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Dre thanks for shooting the vids! Can you send me my 12.613 vid? That's my PB and I'd love to have it. Or maybe you stuck it in another thread and I just need to find it...
Dre thanks for shooting the vids! Can you send me my 12.613 vid? That's my PB and I'd love to have it. Or maybe you stuck it in another thread and I just need to find it...
Originally Posted by C230 Mulac
Also, thanks for letting me use your drag radials
Uh oh, the fastest run I recorded was a 12.63, is the 12.61 above a typo or did I not see that run???
Here's the 12.63, sorry for the delay and hope I didn't miss the best one! (I also have a 12.66 for you against the same car)
Aww man no big deal! I got the time slip that proves it anyway, thanks for the vid
So as everyone prob knows by now, traction was horrible in the morning, couldn't hook up at all for the first 5-6 runs on street tires. I finally got a decent run in the low 13's and then hit 12.73 on street tires before switching to drags:
Then switched over to dre's radials and slowly worked my way down to 12.613. Was really hoping to get in the 12.5 range but oh well, there's always next time and this is a PB! 13.075 was previous PB.
Here is the one from the video:
Final analysis:
-stock with these heavy a$$ wheels, my previous fastest run was 13.075, don't remember trap but it was around 104
-Kleemann headers, no cats or res, straight pipe to stock mufflers, dyno tune by IAP Racing in Sterling, went down to 12.613 @ 111.4mph on drags, 12.730 @ 110.04mph on street (however I do believe I could have done a little better on street if I kept trying, only had 2 runs with decent traction before switching to the radials)
Last edited by C230 Mulac; 12-02-2014 at 07:25 AM.
Reason: Mods
Nice 60's on the DW's. I was curious how the DWs would do compared to the DWS's. Now i know. I was able to cut 1.90's on the All seasons. Awesome tires.
My only additional mod this time was a one-off intake I recently made. I know this setup has more potential for a higher MPH if I run in manual mode and make the 3 to 4 shift earlier. Right now the engine is running out of power in the top RPMs and the trans is shifting right before the trap. Still no tune and have stock exhaust piping with all 4 cats in place from the shorty headers back.
A big thank you, thank you, thank you to Dustin aka Dre5373 for shooting the video. The system at MIR went down and they had no way to print out the info. If it wasn't for Dustin I would have never known I had ran such a great time.....
2005 C55 black on black aka DVS C55, 2007 C230 sport silver on black for the boss
Originally Posted by super-amg
Howwwww????? You can do 1.7 og 60ft please tell us the secret
My mods are posted below and the rest is practice. Good tires are important. Quickly push the pedal to full throttle but don't just stomp and go. That day I had a couple 1.7x and a few very low 1.8x.
My mods are posted below and the rest is practice. Good tires are important. Quickly push the pedal to full throttle but don't just stomp and go. That day I had a couple 1.7x and a few very low 1.8x.
2005 C55 black on black aka DVS C55, 2007 C230 sport silver on black for the boss
Originally Posted by super-amg
Witch tires you used??
Michelin Pilot Super Sports. I suggest checking out the E55 threads, those guys talk tires more and there are a bunch of great options for tires that get sticky when hot.
i recently made a few passes with my 06 c55 for the first time and was pretty upset with my times, hopefully i can get some tips from veteran c55 racers. best time was 13.18 @107 with a 1.9 60ft, mods are gutted primary cats, deleted secondaries resonators and mufflers, dcai, no spare or tool kit, and was on nitto nt01 245/45/16 drag radials with the 13lb clk forged aluminum wheels. I feel like i should be well into the 12's but it seems traction was my biggest issue. Had the drag radials down to 18psi next time i am thinking 12-13? Ran a 13.2xx my first pass with esp off and manual mode with a 2.0 60ft, then went into dyno mode and s shifting, ran 15 something because of how bad i spun launching from 1500rpm, then i left it in dyno mode, went back to M shifting, lowered tires from 23psi to 18, launched off idle and made the 13.1 pass then the lanes got too crowded, hoping to go back in a week or two
Weather? Elevation? 13.2 and 107 are fairly comparable for a rwd car on street tires. Same with a 1.9 and 2.0 60ft. Do you really have NT01's? NT05's or NT05r's?
NT01's are NOT a drag radial. That could be your problem. They are an auto-x/road course tire, big difference. In fact, the opposite, as they have stiff sidewalls for road racing while the NT05r's(and to an extent, NT05's) have the soft, wanna-be wrinkle walls.
Weather? Elevation? 13.2 and 107 are fairly comparable for a rwd car on street tires. Same with a 1.9 and 2.0 60ft. Do you really have NT01's? NT05's or NT05r's?
NT01's are NOT a drag radial. That could be your problem. They are an auto-x/road course tire, big difference. In fact, the opposite, as they have stiff sidewalls for road racing while the NT05r's(and to an extent, NT05's) have the soft, wanna-be wrinkle walls.
mid 50's was at cecil county drag way. Im an hour+ from any track so i need to drive there thats why i didn't buy a try drag radial, i assume i will have to go very low in pressure to get the sidewalls to come down i didn't think it would be that bad considering its a heavy car
2005 C55 black on black aka DVS C55, 2007 C230 sport silver on black for the boss
I cut mid-high 1.8s many times on Continental Extreme Contact DWs @ 28-30 PSI. I hold the 60ft record for an N/A C55 @ 1.73 on Michelin Pilot Super @ 28psi.
If you go too low on a radial the center of the tread cups in reducing traction because the sidewalls are still pretty rigid but the center doesn't have enough pressure to keep the contact patch pushed out. In addition the rolling resistance increases, slowing the car down.
Rule of thumb is reduction in 60ft times x 2 equals reduction in e.t., as in if you hit 1.88 60ft and were at 1.98 you should see a .20 reduction, or 12.98 down from your 13.18 in the 1/4
Next time out, make sure you let the car cool for an hour minimum before racing but make sure it is warmed up before you make a pass. Keep the tire pressure in the 25-30psi range, launch @ 750rpms, roll into the throttle quick n smooth.
Last edited by EDgineered; 11-12-2015 at 10:31 AM.
mid 50's was at cecil county drag way. Im an hour+ from any track so i need to drive there thats why i didn't buy a try drag radial, i assume i will have to go very low in pressure to get the sidewalls to come down i didn't think it would be that bad considering its a heavy car
Cecil's a good track, and at times, a terrible crowd. But hey, Cecil's the closest to me so at least you've given me an idea!
I dunno if you really understand the NT01's. They aren't drag radials, they aren't faux-drag radials, they aren't even just sticky summer tires. They are R-compound(far as I know), super stiff sidewall tires meant for auto cross. Hence the water channels on the inside but near slicks out side, where a lot of the cornering forces are placed on a tire. It also NEEDS heat. At 50* they probably were well under optimal temp just cooling off between runs. They're meant for a 10 minute track session. As EDgineered said, those sidewalls are tough, so letting tons of air out will only serve to deform the contact patch after a point. Ya just can't change the tire's construction.
The NT05r are basically symetrical in both area and compound I'd assume
If you wanted a great traction, more streetable tire, with more water channels and groves for a not as rough and tumble ride, that'd be the plain NT05
Hope that helps
Last edited by ///AchMeinGott; 11-12-2015 at 12:56 PM.
Cecil's a good track, and at times, a terrible crowd. But hey, Cecil's the closest to me so at least you've given me an idea!
I dunno if you really understand the NT01's. They aren't drag radials, they aren't faux-drag radials, they aren't even just sticky summer tires. They are R-compound(far as I know), super stiff sidewall tires meant for auto cross. Hence the water channels on the inside but near slicks out side, where a lot of the cornering forces are placed on a tire. It also NEEDS heat. At 50* they probably were well under optimal temp just cooling off between runs. They're meant for a 10 minute track session. As EDgineered said, those sidewalls are tough, so letting tons of air out will only serve to deform the contact patch after a point. Ya just can't change the tire's construction.
The NT05r are basically symetrical in both area and compound I'd assume
If you wanted a great traction, more streetable tire, with more water channels and groves for a not as rough and tumble ride, that'd be the plain NT05
Hope that helps
Well its too late now because i already have them and theyre like new, so you think theyre worse than my nt555 high performance summer tires on stock wheels? I'm getting tuned next week and heading back to the track next weekend to hopefully secure a 12 sec run.
You have to talk "worse" in a specific context. The NT01 from what I understand is a great track tire. The 555's seem to be a hot topic. My buddy has them on his 00 Mustang GT and we both think they are so so at best. Others think they are amazing. From a handling perspective, same size tire(width and aspect ratio) the NT01 are head and shoulders above the 555's without question.
For straight line traction... the NT01's have the opposite characteristics you're looking for in a tire though. When extremely heated up, they will be much stickier then the 555's, but I don't know a burnout will even be enough. You may indeed be better with the 555's.
Lol seems like it's been a while since a post but I'll put mine up as I just bought my 05 c55 in Feb 2016...
1.60ft 1.9sec
2.1/4 13.7
3.trap 102mph
4. Kleemann chip and headers 245/45/17 nitto555r
5. Bandimere Speedway. 5800ft. D/A 6900ft
I have plugs and wires to do next on mine (77k miles and need to do valve cover gaskets anyway)- can you recommend wires that might help with performance?
Recently I went to the dragstrip after installing headers and dyno tuning the car, I made 350/367 to the wheels on a dyno jet. Before headers and tune my best E.T. was a 13.2@106, this was 100% stock just playing with pressures on pilot sport 4s, around April of this year. I went back again last week and my best time was 13.0@105. I did 4 runs, using the same technique I have used before. ESP off, sport mode, do a burnout, brake hold the car and launch. I also played with the pressures, I ran the car full weight once again.
Now the issue I had was that on my first 2 runs the car was short shifting, so for my 3rd run I switch to comfort mode and even though I launched pretty bad I still got a bit more mph, on my last run I launched at 2krpm and that's when I broke 104 for the first time that night. I truly believe I would have done a lot better had I switched to comfort mode earlier and upped the RPMs on launch. Still, I was expecting more mph. Sadly the local track won't open until next year, so I will have to wait a few months to find out.
11-28-2014, 10:41 AM
