The dyno discussion!!!!
#126
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I think you may be misunderstanding - no one said that negative DA wasn't/isn't beneficial. Not speaking for Marcus, but I read his comment to suggest that as DA drops, a vehicle's subsequent improvement in performance isn't necessarily a linear improvement. So, allegedly going from 3,000 to 2,000 in DA could result in a more meaningful improvement than going from +500 to -500 in DA for both dropping E/T and increasing trap speeds, even though both are an improvement of 1,000.
I cannot confirm or deny that observation myself - not enough runs, nor do I ever bother to A. check DA or B. correct said runs. Best of luck if you get into bracket racing, have heard from many that it's an fun and exciting test of drivers' wits and abilities. How consistent are your R/T's?
I cannot confirm or deny that observation myself - not enough runs, nor do I ever bother to A. check DA or B. correct said runs. Best of luck if you get into bracket racing, have heard from many that it's an fun and exciting test of drivers' wits and abilities. How consistent are your R/T's?
As for my RT's....not even worth mentioning because I've solely concentrating on just trying to get a clean launch. The few times I did concentrate on my RT's I did hit .1xx a few times but never down into .0xx. I've only been to drag strip 7 times starting from the beginning of this year.
#127
Super Member
Hey Sneakyneon, I've been doing a little research and it seems like Zeitronix-Dashdaq (my logger) has decided to make their part compatible with each other. It definitely seems more cost effective when compared to Dashdaq's partnership with Innovative motorsports. Maybe when you get a chance you could take a look at Zeitronix and give your opinion on the partnership between the two companies. I'm looking to run EGT and boost through my Dashdaq possibly using their hardware.
Last edited by sneakyneon; 09-06-2009 at 07:20 PM.
#128
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I think you may be misunderstanding - no one said that negative DA wasn't/isn't beneficial. Not speaking for Marcus, but I read his comment to suggest that as DA drops, a vehicle's subsequent improvement in performance isn't necessarily a linear improvement. So, allegedly going from 3,000 to 2,000 in DA could result in a more meaningful improvement than going from +500 to -500 in DA for both dropping E/T and increasing trap speeds, even though both are an improvement of 1,000.
Between you and Mo and your obsession with DA it's hard to discuss these things with you guys. You guys think that with -10000DA your cars would fly to the moon and that is likely because you simply have not run in negative DA conditions, and therefore lack the experience as to what too much negative DA can do to you...... You guys think I'm diffusional with DA but if you want to talk DA with someone else who knows what they are talking about, PM Jay w/ the CL600. He is also an experienced drag racer who actually lives somewhere that has many days with very cold temps and he will tell you that this holy grail of negative DA you guys are hoping for helps but isn't going to give you guys instant rocket boosters.
Marcus believes that Rodney and Alan ran at a difference of 600 ft of DA, but as Rodney stated, his run took place on 11/23/08 not 11/13/08, as there was a date typo in his video. When I checked the DA on 11/23/08 using dragtimes' calculator, I found that the best DA on that day was -950 ft and the worst was -600 ft. I don't know the exact time of Rodney's run but even assuming he ran at the worst DA of the day (which was -600 ft), we still get a difference of 1600 ft. Rodney ran 12.05 @ 125 vs Alan's 11.05 @ 130 mph. As you can see, a difference of approximately 1600 ft in DA (even if taken place near zero level) still generated a difference of nearly 5 mph especially given the fact that Marcus believes the two cars are similarly powered (within 20 rwhp of each other).
Again.... to some, this difference maybe negligible but to others, it is more significant
Contrary to popular belief, we actually use very solid and evident data to estimate the effects of DA on our cars. We travel very long distances and spend a lot of money to run our cars at varying tracks with varying DA and varying conditions. In my personal opinion, I respectfully disagree with Marcus and believe things do get much better than at 1000 ft of DA. Eventually, it is only a matter of time until one (or at least one) of the west coasters is able to run his/her car at -2000 ft of DA and report back the results. And however significant or insignificant they may be, they will definitely make for an interesting analysis.
#129
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Neither Alan nor myself were arguing that the difference in performance is identical for a specific difference in DA. The improvement in performance may not be linear but may still be significant. Marcus, unfortunately, has this idea that we (Alan, myself, Juicee, and others here on the west coast) seem to think of DA as the God of racing or something as evident by his post here....
This assumption that we think that negative DA will give us an instant rocket boost is inherently incorrect. Ironically, almost all of our statements and observations regarding DA come directly from comparisons of real world numbers provided by many members on this site. In fact, we have gathered so much real world data by running our own cars at different tracks with very different DAs, such as, Sacramento, Famoso, Fontana, LACR, etc.... that we are able to predict very closely how the cars will react in different conditions. We even try to expand our data pool by including data from runs in different states then comparing the results. We compare actual real world runs in the east coast versus comparable runs here in the west coast. For instance, when I ran my car (factory stock) at Famoso one day with a DA of +200 ft, I hit 12.24 @ 115 mph; if you compare this run to oldgixxer's run (also a stock E63) which resulted in 11.95 @ 118 mph with a DA of -1400 ft, you get a difference of 0.3 seconds in ET and 3 mph in trap speed. Now this difference may be negligible to some people but it is significant to me and possibly others.
Marcus believes that Rodney and Alan ran at a difference of 600 ft of DA, but as Rodney stated, his run took place on 11/23/08 not 11/13/08, as there was a date typo in his video. When I checked the DA on 11/23/08 using dragtimes' calculator, I found that the best DA on that day was -950 ft and the worst was -600 ft. I don't know the exact time of Rodney's run but even assuming he ran at the worst DA of the day (which was -600 ft), we still get a difference of 1600 ft. Rodney ran 12.05 @ 125 vs Alan's 11.05 @ 130 mph. As you can see, a difference of approximately 1600 ft in DA (even if taken place near zero level) still generated a difference of nearly 5 mph especially given the fact that Marcus believes the two cars are similarly powered (within 20 rwhp of each other).
Again.... to some, this difference maybe negligible but to others, it is more significant
Our data and statements actually prove one of Marus' statements that the effects of DA get much worse at higher values and show that we do not believe, as Marcus stated, that "the lower the DA the better ad infinitum". Compare, for instance, Alan's most recent runs at Sacramento with his runs at Fontana a month earlier: at Fontana, in a DA of +4000 ft (it was actually a bit more but to put some minds at ease, I'm using this estimate), Alan ran 11.6 @ 122 to 123 mph while at Sacramento, in a DA of approximately +1000 ft, he ran an 11.05 @ 130 mph. There was a difference of 7 to 8 mph which is indeed great. However, even though the effects of DA is smaller near zero level, that does not mean they do not or should not count, as they maybe significant to others despite the fact that they are smaller than the effects at higher values.
Contrary to popular belief, we actually use very solid and evident data to estimate the effects of DA on our cars. We travel very long distances and spend a lot of money to run our cars at varying tracks with varying DA and varying conditions. In my personal opinion, I respectfully disagree with Marcus and believe things do get much better than at 1000 ft of DA. Eventually, it is only a matter of time until one (or at least one) of the west coasters is able to run his/her car at -2000 ft of DA and report back the results. And however significant or insignificant they may be, they will definitely make for an interesting analysis.
This assumption that we think that negative DA will give us an instant rocket boost is inherently incorrect. Ironically, almost all of our statements and observations regarding DA come directly from comparisons of real world numbers provided by many members on this site. In fact, we have gathered so much real world data by running our own cars at different tracks with very different DAs, such as, Sacramento, Famoso, Fontana, LACR, etc.... that we are able to predict very closely how the cars will react in different conditions. We even try to expand our data pool by including data from runs in different states then comparing the results. We compare actual real world runs in the east coast versus comparable runs here in the west coast. For instance, when I ran my car (factory stock) at Famoso one day with a DA of +200 ft, I hit 12.24 @ 115 mph; if you compare this run to oldgixxer's run (also a stock E63) which resulted in 11.95 @ 118 mph with a DA of -1400 ft, you get a difference of 0.3 seconds in ET and 3 mph in trap speed. Now this difference may be negligible to some people but it is significant to me and possibly others.
Marcus believes that Rodney and Alan ran at a difference of 600 ft of DA, but as Rodney stated, his run took place on 11/23/08 not 11/13/08, as there was a date typo in his video. When I checked the DA on 11/23/08 using dragtimes' calculator, I found that the best DA on that day was -950 ft and the worst was -600 ft. I don't know the exact time of Rodney's run but even assuming he ran at the worst DA of the day (which was -600 ft), we still get a difference of 1600 ft. Rodney ran 12.05 @ 125 vs Alan's 11.05 @ 130 mph. As you can see, a difference of approximately 1600 ft in DA (even if taken place near zero level) still generated a difference of nearly 5 mph especially given the fact that Marcus believes the two cars are similarly powered (within 20 rwhp of each other).
Again.... to some, this difference maybe negligible but to others, it is more significant
Our data and statements actually prove one of Marus' statements that the effects of DA get much worse at higher values and show that we do not believe, as Marcus stated, that "the lower the DA the better ad infinitum". Compare, for instance, Alan's most recent runs at Sacramento with his runs at Fontana a month earlier: at Fontana, in a DA of +4000 ft (it was actually a bit more but to put some minds at ease, I'm using this estimate), Alan ran 11.6 @ 122 to 123 mph while at Sacramento, in a DA of approximately +1000 ft, he ran an 11.05 @ 130 mph. There was a difference of 7 to 8 mph which is indeed great. However, even though the effects of DA is smaller near zero level, that does not mean they do not or should not count, as they maybe significant to others despite the fact that they are smaller than the effects at higher values.
Contrary to popular belief, we actually use very solid and evident data to estimate the effects of DA on our cars. We travel very long distances and spend a lot of money to run our cars at varying tracks with varying DA and varying conditions. In my personal opinion, I respectfully disagree with Marcus and believe things do get much better than at 1000 ft of DA. Eventually, it is only a matter of time until one (or at least one) of the west coasters is able to run his/her car at -2000 ft of DA and report back the results. And however significant or insignificant they may be, they will definitely make for an interesting analysis.
Of course, since we all agree all these handbuilt AMG motors vary quite a bit in power output, you really can't compare different cars (e.g. you and Rob) and accurately deduce that DA is the sole factor causing the performance (e.g. 0.3 @ 3 mph) differences - just like comparing two different cars' dyno results, different dynos, operators, states, days, etc. is interesting conversation but otherwise not particularly useful. Rob's car may be quicker/faster than yours, or not... you really have to run 'em same track same day to draw any definitive conclusions, I'd think. DA correction factors might get you close - have you corrected Rob's run and your run to sea level for illustrative purposes?
Bottomline, IMHO, if Alan hauls his E55 out to MIR, ATCO, E-town, et. al. for a fall/winter track day with significantly negative DA, I'm confident he'd establish new PBs that he might not ever be able to replicate at his home track(s).
#130
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Agreed that would make an interesting analysis.
Of course, since we all agree all these handbuilt AMG motors vary quite a bit in power output, you really can't compare different cars (e.g. you and Rob) and accurately deduce that DA is the sole factor causing the performance (e.g. 0.3 @ 3 mph) differences - just like comparing two different cars' dyno results, different dynos, operators, states, days, etc. is interesting conversation but otherwise not particularly useful. Rob's car may be quicker/faster than yours, or not... you really have to run 'em same track same day to draw any definitive conclusions, I'd think. DA correction factors might get you close - have you corrected Rob's run and your run to sea level for illustrative purposes?
Bottomline, IMHO, if Alan hauls his E55 out to MIR, ATCO, E-town, et. al. for a fall/winter track day with significantly negative DA, I'm confident he'd establish new PBs that he might not ever be able to replicate at his home track(s).
Of course, since we all agree all these handbuilt AMG motors vary quite a bit in power output, you really can't compare different cars (e.g. you and Rob) and accurately deduce that DA is the sole factor causing the performance (e.g. 0.3 @ 3 mph) differences - just like comparing two different cars' dyno results, different dynos, operators, states, days, etc. is interesting conversation but otherwise not particularly useful. Rob's car may be quicker/faster than yours, or not... you really have to run 'em same track same day to draw any definitive conclusions, I'd think. DA correction factors might get you close - have you corrected Rob's run and your run to sea level for illustrative purposes?
Bottomline, IMHO, if Alan hauls his E55 out to MIR, ATCO, E-town, et. al. for a fall/winter track day with significantly negative DA, I'm confident he'd establish new PBs that he might not ever be able to replicate at his home track(s).
It certainly accounts in our case for the majority of the variance in trap speeds.
Please understand nobody even corrected the time slips. Alan ran 130 mph uncorrected.
My 1.479 is whisked over as a non event when in fact it is the quickest 60 ft time ever achieved in a MB at any track at any DA.
I thought Alans 11.0@130 would finally prove the DA stuff since in the exact same car weeks previous he ran 7-8 mph slower
Last edited by juicee63; 09-07-2009 at 02:37 AM.
#131
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Agreed that would make an interesting analysis.
Of course, since we all agree all these handbuilt AMG motors vary quite a bit in power output, you really can't compare different cars (e.g. you and Rob) and accurately deduce that DA is the sole factor causing the performance (e.g. 0.3 @ 3 mph) differences
Of course, since we all agree all these handbuilt AMG motors vary quite a bit in power output, you really can't compare different cars (e.g. you and Rob) and accurately deduce that DA is the sole factor causing the performance (e.g. 0.3 @ 3 mph) differences
Your statement above concurs with our (west coast guys) beliefs and predictions regarding DA
#132
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Agree it is not the SOLE difference, nobody ever stated this.
It certainly accounts in our case for the majority of the variance in trap speeds.
Please understand nobody even corrected the time slips. Alan ran 130 mph uncorrected.
My 1.479 is whisked over as a non event when in fact it is the quickest 60 ft time ever achieved in a MB at any track at any DA.
I thought Alans 11.0@130 would finally prove the DA stuff since in the exact same car weeks previous he ran 7-8 mph slower
It certainly accounts in our case for the majority of the variance in trap speeds.
Please understand nobody even corrected the time slips. Alan ran 130 mph uncorrected.
My 1.479 is whisked over as a non event when in fact it is the quickest 60 ft time ever achieved in a MB at any track at any DA.
I thought Alans 11.0@130 would finally prove the DA stuff since in the exact same car weeks previous he ran 7-8 mph slower
Second - you're correct, MB Forever didn't say "sole" - but please reread his post, it sure seems to suggest DA differences as the only thing meaningfully different between his run and oldgixxer's - in reality, there are worlds of variables going on... different tracks, track prep differences, different cars, different drivers, different atmospheric conditions, etc.
I'm not saying better DA isn't a factor, but so many other factors are in play here, that it's difficult to draw any definitive conclusions - that's my only point. Heck, they could line up and MB Forever might be a .1 & 1 mph quicker/faster - my point isn't that MB Forever's car is in any way slower... my point is there's no way to know - you know?
Last point - big ups and respect for what the "west coast AMGers" have brought to their respective platforms, at least from this one east-coaster with his lowly 32; no need for
look forward to seeing what the fall/winter brings everyone, including the left coasters!
#134
MBWorld Fanatic!
Dyno number really don't mean squat!! Some dyno can be manipulated. Compare dyno sheets to dyno sheets is only for references. The only thing that really matter is the ET and trap speed at the track!!
#135
Out Of Control!!
If I got to choose a coast I gotta choose the east. I live out there so dont go there. But that dont mean a **** cant rest in the west, see some nice breasts in the west... All I got is beef with those that violate me, I shall annihilate thee
I've been saying this forever
I've been saying this forever
#136
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I ran a great time in summer but yet I have Marcus Frost bringing my name into Dave's thread (when he claims he didn't) referencing me to the high DD dyno in the bay area. Why even do that crap? I was told to back my **** up and I did....period. I don't give a crap if I dynode 400 rwhp and ran my times, but I do give a crap when someone calls BS on my numbers. I shouldn't let haters bug me like that but I just can't help it. Marcus and I use to speak on the phone but yet he can't even congratulate me on my times. I never brag about my car or even post my times in my signature like most do, I just love running my car and that's good enough for me.
Bottom line, don't comment on other peoples **** if you're not out there doing it yourself.
Last edited by bassn_07; 09-07-2009 at 12:51 PM.
#137
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Agree that dynos are simply a point of reference, and you did indeed "back it up" with strong track performance - hope she goes even quicker/faster for you this fall as the weather improves.
The thread you're referring to actually wasn't Dave's thread - it was Fluid's, sharing the dynos of his car after his custom PC tune. A handful of people started in on "bashing" the shop and PC, since the baseline was with an IC malfunction, and the increase was with it fixed. In addition, several of the same posters thought the results seemed low, and that stock E55s are in the same range, etc.
Marcus's post (as I read it) was in defense of the shop and PC, stating that those are good numbers given what he has witnessed on the Chicago area DDs, and that his opinion is the bay area DD that others have experience with (including you) seems a bit high by comparison. Unless there's "behind-the-scenes" info that only you know and he knows, I don't really see much "haterism" in his post...
You've accused him of being "sensitive" but from what I can tell, you're the only one still worked up about this enough to still be posting about it - have noticed several stinging barbs you've put in recent posts, but didn't want to stir the pot so didn't bother replying.
Sincerely hope that eventually we can all move forward without hard feelings or any lingering animosity.
The thread you're referring to actually wasn't Dave's thread - it was Fluid's, sharing the dynos of his car after his custom PC tune. A handful of people started in on "bashing" the shop and PC, since the baseline was with an IC malfunction, and the increase was with it fixed. In addition, several of the same posters thought the results seemed low, and that stock E55s are in the same range, etc.
serge, et. al.
490rwhp on Dyno Dynamics is extremely impressive for an E55. rberga1, with VRP600, pulled 460rwhp on DD and his car ran mid 11s at 123ish MPH (if I recall correctly)
The highest Dave (the guy who's car made this pull) ever dyno'd before his custom tune (basically, with off the shelf EVOSport software) was in the 450rwhp range, also on Dyno Dynamics. So even over that, it's still another 40rwhp.
Dyno Dynamics is NOT Dynojet, and the DD in the Bay Area that you use and Alan uses reads a lot higher than the two DDs (and any other one I've seen) here in Chicago.
Congrats on the killer #s Dave.
-m
490rwhp on Dyno Dynamics is extremely impressive for an E55. rberga1, with VRP600, pulled 460rwhp on DD and his car ran mid 11s at 123ish MPH (if I recall correctly)
The highest Dave (the guy who's car made this pull) ever dyno'd before his custom tune (basically, with off the shelf EVOSport software) was in the 450rwhp range, also on Dyno Dynamics. So even over that, it's still another 40rwhp.
Dyno Dynamics is NOT Dynojet, and the DD in the Bay Area that you use and Alan uses reads a lot higher than the two DDs (and any other one I've seen) here in Chicago.
Congrats on the killer #s Dave.
-m
You've accused him of being "sensitive" but from what I can tell, you're the only one still worked up about this enough to still be posting about it - have noticed several stinging barbs you've put in recent posts, but didn't want to stir the pot so didn't bother replying.
Sincerely hope that eventually we can all move forward without hard feelings or any lingering animosity.
#140
MBWorld Fanatic!
juicee, first things first - your 60' is amazing, I hope it doesn't seem like people don't respect it, I (for one) certainly do. That you did it with the heavier CLS platform makes it all the more noteworthy.
Second - you're correct, MB Forever didn't say "sole" - but please reread his post, it sure seems to suggest DA differences as the only thing meaningfully different between his run and oldgixxer's - in reality, there are worlds of variables going on... different tracks, track prep differences, different cars, different drivers, different atmospheric conditions, etc.
I'm not saying better DA isn't a factor, but so many other factors are in play here, that it's difficult to draw any definitive conclusions - that's my only point. Heck, they could line up and MB Forever might be a .1 & 1 mph quicker/faster - my point isn't that MB Forever's car is in any way slower... my point is there's no way to know - you know?
Last point - big ups and respect for what the "west coast AMGers" have brought to their respective platforms, at least from this one east-coaster with his lowly 32; no need for
look forward to seeing what the fall/winter brings everyone, including the left coasters!
Second - you're correct, MB Forever didn't say "sole" - but please reread his post, it sure seems to suggest DA differences as the only thing meaningfully different between his run and oldgixxer's - in reality, there are worlds of variables going on... different tracks, track prep differences, different cars, different drivers, different atmospheric conditions, etc.
I'm not saying better DA isn't a factor, but so many other factors are in play here, that it's difficult to draw any definitive conclusions - that's my only point. Heck, they could line up and MB Forever might be a .1 & 1 mph quicker/faster - my point isn't that MB Forever's car is in any way slower... my point is there's no way to know - you know?
Last point - big ups and respect for what the "west coast AMGers" have brought to their respective platforms, at least from this one east-coaster with his lowly 32; no need for
look forward to seeing what the fall/winter brings everyone, including the left coasters!
Alan backed up his dyno with a world record pass. Marcus chose to do something illogical. Ignore the track numbers and deflect the discussion to DA?
Hard to drop this when Marcus chose to include several of us in his post that were not involved in his dyno debate whatsoever.
Sorry Im responding to you when I really should be responding to Marcus but he caused a stir then decided to leave.
Last edited by juicee63; 09-07-2009 at 05:11 PM.
#141
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Alan's car is a monster....I've seen it on the dyno and it makes every bit of power he claims.
Alan - You should go with the Phormula Knock Detector....they are great tools and the KS2 / KS3 works out of the box. It comes with an extra Bosch 02 sensor and all you need to do is mount it under the blower and plug it in. We have them installed on a few cars and it's nice to know when the car is having a "bad" day.
Alan - You should go with the Phormula Knock Detector....they are great tools and the KS2 / KS3 works out of the box. It comes with an extra Bosch 02 sensor and all you need to do is mount it under the blower and plug it in. We have them installed on a few cars and it's nice to know when the car is having a "bad" day.
#143
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2005 E55
Rodney it really still doesn't matter. While 1500ft of DA is considerable, it's less significant when it's close to 0. It's much more significant if it were from like 2500 to 1000. Feel free to use the calculator at dragtimes.com and run your times with 1000DA and -500DA. You'll see little difference. I don't like that calculator, but since people don't want to listen to my experience it's another way to support my perspective.
#144
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Hey Rodney, If you run your car in different conditions you'll come up with your own correction factors for your car and your mods. It seems that most of the cars here that are highly modified correct closer to the "Stock and Mildly Modified Naturally Aspirated Engines", but I could only speak for my car. I have several time slips that gives me my own calculations and what to expect in varying conditions. In the end, what you run is what you did but it gives me piece of mind knowing if my car is performing well on that day given the conditions.
Good luck and get your car back to the track!!!!!!
Good luck and get your car back to the track!!!!!!
#145
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Hey Rodney, If you run your car in different conditions you'll come up with your own correction factors for your car and your mods. It seems that most of the cars here that are highly modified correct closer to the "Stock and Mildly Modified Naturally Aspirated Engines", but I could only speak for my car. I have several time slips that gives me my own calculations and what to expect in varying conditions. In the end, what you run is what you did but it gives me piece of mind knowing if my car is performing well on that day given the conditions.
Good luck and get your car back to the track!!!!!!
Good luck and get your car back to the track!!!!!!
Yeah I've only taken my car twice to the track on real cold days in Chicago where the temps were anywhere from 40-60 degrees. Once when I was stock and the other when I ran the 125 trap. Never went to the track on a warm day as I knew the car wouldn't run its fastest.
I would go to the track more often but most of my friends would rather hit the road course than the dragstrip these days. Back in my Supra days from '97-'01 we probably hit the dragstrip at least 10-15 times a year...and on the days of very warm temps my times and traps were really effected.
My car is currently on my lift in the process of installing my midpipe section. My friend accidentally stripped one of the 4 bolts that connects one of the midpipe sections to the vadim's shorty header (Man is it a pain to get those 4 bolts tighetened up! There is barely any room to fit a 13mm socket on the screw as it is right next to the pipe). So once I re-tap that, I can finish it up and head to the track!
Last edited by rberga1; 09-09-2009 at 09:57 PM.
#146
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What does your 130mph at +1000 DA correct to at -600 DA?
Yeah I've only taken my car twice to the track on real cold days in Chicago where the temps were anywhere from 40-60 degrees. Once when I was stock and the other when I ran the 125 trap. Never went to the track on a warm day as I knew the car wouldn't run its fastest.
I would go to the track more often but most of my friends would rather hit the road course than the dragstrip these days. Back in my Supra days from '97-'01 we probably hit the dragstrip at least 10-15 times a year...and on the days of very warm temps my times and traps were really effected.
My car is currently on my lift in the process of installing my midpipe section. My friend accidentally stripped one of the 4 bolts that connects one of the midpipe sections to the vadim's shorty header (Man is it a pain to get those 4 bolts tighetened up! There is barely any room to fit a 13mm socket on the screw as it is right next to the pipe). So once I re-tap that, I can finish it up and head to the track!
Yeah I've only taken my car twice to the track on real cold days in Chicago where the temps were anywhere from 40-60 degrees. Once when I was stock and the other when I ran the 125 trap. Never went to the track on a warm day as I knew the car wouldn't run its fastest.
I would go to the track more often but most of my friends would rather hit the road course than the dragstrip these days. Back in my Supra days from '97-'01 we probably hit the dragstrip at least 10-15 times a year...and on the days of very warm temps my times and traps were really effected.
My car is currently on my lift in the process of installing my midpipe section. My friend accidentally stripped one of the 4 bolts that connects one of the midpipe sections to the vadim's shorty header (Man is it a pain to get those 4 bolts tighetened up! There is barely any room to fit a 13mm socket on the screw as it is right next to the pipe). So once I re-tap that, I can finish it up and head to the track!
Haha...I know what exactly what flange you're talking about. Just make sure you use a long enough bolt, but no too long or you'll have clearance issues on the backside. Did you end up getting the race cats?