Custom LET Tune vs. Stock E55
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Joined: Jun 2009
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From: San Ramon, CA
A Prius because I'm green
Custom LET Tune vs. Stock E55
Ok so help me figure this out. Last night I ran against two other E55s. One had a custom Powerchips tune the other had a custom LET tune. This was perfect since I read great things about LET tunes and I was seriously considering getting one.
After running against the LET tune twice last night I just can't believe what the outcome was. Our first run he got a jump on me and I was on his rear bumper. I remember thinking he should be faster until I hooked and realized my car was running strong. I knew I was going to catch him and in fact I pulled ahead. The second time the same thing happened and that is what the video is of. I'm seriously debating what the issue with his car can be. I was told he had the numbers on the dyno to show it. Also he has a 180mm ASP pulley, HE, -10 degree.
I can only find the tune to be the issue with why he couldn't remain ahead of me or even pull on me. I'm not bashing anyone, I just felt bad for the guy since here he is with a custom tune and stock is beating him. I don't think a custom tune should be having this issue since I ran consistant all day as well as the Powerchips tune.
I'm sure some are happy with LETs tune and I'm happy for them. I just hope you take this for what it's worth since it's your money and your car. I hope more can share what they experience so we can keep the competitive edge out there which is the best part about this all. Also the goal too is to represent MB at the track and to help each other fly that flag right?
http://www.youtube.com/watch?v=7c5-27v397U
After running against the LET tune twice last night I just can't believe what the outcome was. Our first run he got a jump on me and I was on his rear bumper. I remember thinking he should be faster until I hooked and realized my car was running strong. I knew I was going to catch him and in fact I pulled ahead. The second time the same thing happened and that is what the video is of. I'm seriously debating what the issue with his car can be. I was told he had the numbers on the dyno to show it. Also he has a 180mm ASP pulley, HE, -10 degree.
I can only find the tune to be the issue with why he couldn't remain ahead of me or even pull on me. I'm not bashing anyone, I just felt bad for the guy since here he is with a custom tune and stock is beating him. I don't think a custom tune should be having this issue since I ran consistant all day as well as the Powerchips tune.
I'm sure some are happy with LETs tune and I'm happy for them. I just hope you take this for what it's worth since it's your money and your car. I hope more can share what they experience so we can keep the competitive edge out there which is the best part about this all. Also the goal too is to represent MB at the track and to help each other fly that flag right?
http://www.youtube.com/watch?v=7c5-27v397U
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2006 E55 AMG
Yeah, I also felt bad for the guy. I was really surprised of the outcome and his car was trapping very low for his mod, especially a custom tuned car. Take it that my car is definitely modded way more than his but a 1.6 second difference in the 1/4 mile....come on. I was thinking heat could be the issue but he has all the recommended cooling for a tune and 180 pulley...the stock E55 doesn't have anything for cooling.
I'm really hoping it's not the tune but I can't think of anything else. I offered my datalogger to him but he wasn't really that interested in using it. Mike, the stock E55, use my datalogger and he was seeing anywhere from 120 -150 ish, I think. I'll check later on to see exactly what his IAT's were.
Mike, have you decided what tune your going with?
God....I watched that video ten times already.
I'm really hoping it's not the tune but I can't think of anything else. I offered my datalogger to him but he wasn't really that interested in using it. Mike, the stock E55, use my datalogger and he was seeing anywhere from 120 -150 ish, I think. I'll check later on to see exactly what his IAT's were.
Mike, have you decided what tune your going with?
God....I watched that video ten times already.
Thread Starter
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Joined: Jun 2009
Posts: 845
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From: San Ramon, CA
A Prius because I'm green
Yeah, I also felt bad for the guy. I was really surprised of the outcome and his car was trapping very low for his mod, especially a custom tuned car. Take it that my car is definitely modded way more than his but a 1.6 second difference in the 1/4 mile....come on. I was thinking heat could be the issue but he has all the recommended cooling for a tune and 180 pulley...the stock E55 doesn't have anything for cooling.
I'm really hoping it's not the tune but I can't think of anything else. I offered my datalogger to him but he wasn't really that interested in using it. Mike, the stock E55, use my datalogger and he was seeing anywhere from 120 -150 ish, I think. I'll check later on to see exactly what his IAT's were.
Mike, have you decided what tune your going with?
God....I watched that video ten times already.
I'm really hoping it's not the tune but I can't think of anything else. I offered my datalogger to him but he wasn't really that interested in using it. Mike, the stock E55, use my datalogger and he was seeing anywhere from 120 -150 ish, I think. I'll check later on to see exactly what his IAT's were.
Mike, have you decided what tune your going with?
God....I watched that video ten times already.
For the tune I'm definitely going for Powerchips since you ran consistant. Hopefully they can give me a deal and I want them to use your tune as the baseline before fine tuning my little kitten. I just need to get a HE and reservoir installed and some DRs first. That heat and lack of gripped killed my car during the day but it still was fun. Oh and I'm still on that damn debate between MB or Chryslers warranty that's half the price. Decisions decisions! Are the Chrysler warranties a mirror image of the MB like everyone states?
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From: NorCal
W211,E90,E66,E39,E38,NSX,Z32-TT
Against him I was down to 113 to 117 and hit 144 when I trapped and looked. I didn't record that one but the runs before I was 126 to 155.
For the tune I'm definitely going for Powerchips since you ran consistant. Hopefully they can give me a deal and I want them to use your tune as the baseline before fine tuning my little kitten. I just need to get a HE and reservoir installed and some DRs first. That heat and lack of gripped killed my car during the day but it still was fun. Oh and I'm still on that damn debate between MB or Chryslers warranty that's half the price. Decisions decisions! Are the Chrysler warranties a mirror image of the MB like everyone states?
For the tune I'm definitely going for Powerchips since you ran consistant. Hopefully they can give me a deal and I want them to use your tune as the baseline before fine tuning my little kitten. I just need to get a HE and reservoir installed and some DRs first. That heat and lack of gripped killed my car during the day but it still was fun. Oh and I'm still on that damn debate between MB or Chryslers warranty that's half the price. Decisions decisions! Are the Chrysler warranties a mirror image of the MB like everyone states?
Not mirror, but pretty much as comprehensive as "bumper to "bumper" as it can get.
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2006 E55 AMG
If you really think about it, how many times can LET make it over here
? Do you honestly think you could find 5 new customers every time you need a re-tune? Not bashing, but thinking logically. It doesn't make sense when you have reputable tuners within driving distance. JMHO. I've been telling you, GET THE CHRYSLER WARRANTY!!!!! Use the other 2k form mods
.
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211-55
Somethings not right. Get her checked out. I wouldn't immediately point to the tune, but it's definitely a suspect. I went with a PC tune mostly because it was available locally at a local shop in San Francisco, but my neck and butt dyno tells me you can't go wrong with it.
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W211,E90,E66,E39,E38,NSX,Z32-TT
Somethings not right. Get her checked out. I wouldn't immediately point to the tune, but it's definitely a suspect. I went with a PC tune mostly because it was available locally at a local shop in San Francisco, but my neck and butt dyno tells me you can't go wrong with it.
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2015 E63S, 2018 E63S
The more I see things like this the more I consider leaving my car stock. In ok weather I avg 116.5 in the 1/4 and in 50 degree I ran a best of 117.7 My goal is to run into the 11's and with DR's I believe I will get there. On street tires my best 60' is 1.85 and 1/4 12.09. I will wait until either we run into some colder weather or I will just wait until oct-nov to head back to the track.
just to be fair to the E55 with the LET tune, that left lane at Sac is VERY *****ty. I only run in the right lane when at Sac.
just to be fair to the E55 with the LET tune, that left lane at Sac is VERY *****ty. I only run in the right lane when at Sac.
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Joined: Dec 2008
Posts: 574
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From: NorCal
W211,E90,E66,E39,E38,NSX,Z32-TT
Somethings not right. Get her checked out. I wouldn't immediately point to the tune, but it's definitely a suspect. I went with a PC tune mostly because it was available locally at a local shop in San Francisco, but my neck and butt dyno tells me you can't go wrong with it.
I feel that the tune characteristics played out correctly at the track. I had massive traction problems at launch (high TQ) coupled with low trap speed at the 1/4 mile (low HP at peak).
During our last run (video), I thought I got him because we had an identical launch. However, once our tires were hooked, I was so shocked to see him walk away from me! WTH!!!
Either that or it's my driving. :/
Last edited by AZIPOD; Jul 4, 2009 at 04:29 PM.
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From: San Ramon, CA
A Prius because I'm green
Go local, I think it's the best way. After you get your mods installed you'll basically have the same thing as myself. Have PC use my tune as a baseline and tune from there. Remember, I didn't tune with my airbox so it should be close. Just make sure you watch your AFR's and it should be fine.
If you really think about it, how many times can LET make it over here? Do you honestly think you could find 5 new customers every time you need a re-tune? Not bashing, but thinking logically. It doesn't make sense when you have reputable tuners within driving distance. JMHO.
I've been telling you, GET THE CHRYSLER WARRANTY!!!!! Use the other 2k form mods.
If you really think about it, how many times can LET make it over here
? Do you honestly think you could find 5 new customers every time you need a re-tune? Not bashing, but thinking logically. It doesn't make sense when you have reputable tuners within driving distance. JMHO. I've been telling you, GET THE CHRYSLER WARRANTY!!!!! Use the other 2k form mods
.It's Saturday I can't buy anything or I would. I feel like a nerd in a calculator store, which one to buy? Too bad everything is closed! I want to go get the cooling done first if I can and go back up to Sac and run the next TnT.
I'm going to talk to the guy with the purple Camaro about fabricating some air scoops like we were talking about since he does that at work. Plus two other engineers have carbon fiber machines in their garage. I doubt they will do anything but alls I can do is ask.
Totally addicted now
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211-55
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2006 E55 AMG
You should have datalogged Jerry. Next time I'm going to insist on you using my datalogger. If you did many things would have been eliminated. I'm sure you had fun either way and that's all that matters. At least you know there's definitely a issue with your car and it should be checked. Borrow a datalgger and do a few runs to see where your IAT's are.
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2015 E63S, 2018 E63S
When LET dyno tuned my car, they were able to get a tremendous amount of TQ down low but HP was not very impressive at all, considering the mods.
I feel that the tune characteristics played out correctly at the track. I had massive traction problems at launch (high TQ) coupled with low trap speed at the 1/4 mile (low HP at peak).
During our last run (video), I thought I got him because we had an identical launch. However, once our tires were hooked, I was so shocked to see him walk away from me! WTH!!!
Either that or it's my driving. :/
I feel that the tune characteristics played out correctly at the track. I had massive traction problems at launch (high TQ) coupled with low trap speed at the 1/4 mile (low HP at peak).
During our last run (video), I thought I got him because we had an identical launch. However, once our tires were hooked, I was so shocked to see him walk away from me! WTH!!!
Either that or it's my driving. :/
Super Member
Joined: Dec 2008
Posts: 574
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From: NorCal
W211,E90,E66,E39,E38,NSX,Z32-TT
MBWorld Fanatic!
Joined: Jan 2005
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From: Bay Area
2015 E63S, 2018 E63S
Thread Starter
Super Member
Joined: Jun 2009
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From: San Ramon, CA
A Prius because I'm green
I don't have my scanner hooked up but here it is.
Time is 9:57PM
Left Lane Right Lane
Car 131 Car 105
Reaction .336 .567
I1 2.270 2.099
I2 5.729 5.463
I3 8.493 8.210
MPH(I3) 90.088 90.667
I4 10.879 10.577
E.T. 12.880 12.558
MPH 116.234 116.999
The first run earlier was at 6:17pm when it was still low 90s maybe high 80s
Left Lane Right Lane
Car 131 Car 105
Reaction .426 .894
I1 2.258 2.099
I2 5.704 5.465
I3 8.527 8.216
MPH (I3) 88.344 90.601
I4 10.962 10.584
E.T. 13.003 12.565
MPH 113.918 117.071
Last edited by Mikesamg; Jul 4, 2009 at 04:55 PM. Reason: I put 98 when it should be 88.344 for MPH I3 on the second run.
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From: San Diego
E55
The more I see things like this the more I consider leaving my car stock. In ok weather I avg 116.5 in the 1/4 and in 50 degree I ran a best of 117.7 My goal is to run into the 11's and with DR's I believe I will get there. On street tires my best 60' is 1.85 and 1/4 12.09. I will wait until either we run into some colder weather or I will just wait until oct-nov to head back to the track.
just to be fair to the E55 with the LET tune, that left lane at Sac is VERY *****ty. I only run in the right lane when at Sac.
just to be fair to the E55 with the LET tune, that left lane at Sac is VERY *****ty. I only run in the right lane when at Sac.
The guy spraying the water at the last track day was a lazy turd and NEVER put any water on the right side. All I did was spin my left tire during burnout most of the time. That's why one of my dr's are worn and the other has lots of tread. I guess an LSD would have made the difference.
GL on your quest for 11s! If you want my spot, I wont give it up without a fight!
I plan to mod soon so get back out there! 
Last edited by Max.H; Jul 4, 2009 at 05:12 PM.
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2015 E63S, 2018 E63S
I bought drag radials thinking it would help me get better 60 foots. Don't think it helped, here is why... BTW my best 60 foot was still only 1.82 or 1.83. I could have done that on radials.
The guy spraying the water at the last track day was a lazy turd and NEVER put any water on the right side. All I did was spin my left tire during burnout most of the time. That's why one of my dr's are worn and the other has lots of tread. I guess an LSD would have made the difference.
GL on your quest for 11s! If you want my spot, I wont give it up without a fight! I plan to mod soon so get back out there!
The guy spraying the water at the last track day was a lazy turd and NEVER put any water on the right side. All I did was spin my left tire during burnout most of the time. That's why one of my dr's are worn and the other has lots of tread. I guess an LSD would have made the difference.
GL on your quest for 11s! If you want my spot, I wont give it up without a fight!
I plan to mod soon so get back out there! 
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From: San Diego
E55
I don't like to lift early, so I can remove all debris from tires.
