1/4 mile times with slip
- Thread starter MS3077
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builthatch
Member
wait, you had a top mount? pfft- my boost air temps were sky high due to extreme heat soak when i did that, as opposed to waiting, when they could settle quite a bit, and my traps went up 4 miles an hour by waiting. same thing happened on a dyno for me.
a FMIC will yield MUCH more consistently low boost air temps because it's not trapped under a hood atop an engine. remember, heat rises! so everything off of the turbo, engine, exhaust....radiates up and soaks itself into the topmost thing that'll take it- the IC. I you know this, but for the noobs- the surface area that the IC uses to cool a charge with flowing hood duct air, is even more adept at using that surface area to HEAT itself if the heat is around it! if you were road racing, i'd not worry that much about back to back, but drags? there is no way it's ideal to not wait.
FMOS Racing
Member
- :
- 2008 MS3, plus a pickup and a beater car
I must respectfully disagree. Based on my experience, I believe that seat time is far more important in a driver’s effort to extract the best ET possible from these cars than is the amount of cool down time. I offer the following evidence:
On Tuesday September 9 I arrived at the track at approximately 4:45 pm, went through tech, and then parked the car, about fourth in my lane, with the hood up until my first pass at 5:43 pm. The mph on that pass was 100.91. I followed it immediately with a hot lap at 5:49 pm and had a mph of 102.19.
I waited 15 minutes (not claiming this is a cool down, just saying that I did sit out a few minutes and chatted with some friends) and then went 100.20 mph at 6:06 pm and then hot lapped to a 101.80 mph pass at 6:10 pm.
I made a few more passes and then a 101.94 at 7:03 pm. I mention that because, as I approached the box for my next pass, there was a wet-down on the track which shut down the lanes. I was third in line, approximately 60 feet from the box. My next pass was at 8:37 pm. I sat in staging for approximately 1 hour and 20 minutes with the hood up. To make my next pass I simply shut the hood, started the car, and pulled into the burnout box. My mph was 101.34.
I made several more passes and then at 9:31 pm I ran 101.32 mph. I literally turned off the return road and back into the burnout box to make the last pass of the night at 9:35 pm, and netted 103.71 mph.
Just a few passes from the event back in May where I ran my previous best (I started off the day running 101 mph):
3:30 pm - 105.61 mph
3:56 pm - 105.65 mph
4:25 pm - 104.17 mph
4:28 pm - 105.39 mph
4:40 pm - 105.13 mph
4:47 pm - 106.33 mph
4:55 pm - 106.66 mph
I have tried long cool downs and icing the intercooler, all old school tricks I’ve used with other vehicles with mixed success. It’s just very dependent and I find that EFI vehicles, especially something nearly stock and forced induction, just doesn’t struggle that much with heat soak.
Of course, ymmv and I'm certainly open to being proved wrong. But I've been doing this for a while and used to be an avid bracket racer. I do a pretty decent job of studying and cataloging what works with a particular vehicle.
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FMOS Racing
Member
- :
- 2008 MS3, plus a pickup and a beater car
Hooser makes a drag radial in 225/50R16 that I'm going to try. Same rolling diameter as stock. On a set of Rota Flights, that should shave another 12 lbs per corner.
http://www.jegs.com/webapp/wcs/stor...Id=760685&itemId=379291&langId=-1&showValue=1
Epping Last night? Wish I knew I wanted to go.
yeah i'm glad you didnt i would have been embarrassed lol. there were a lot of people there for a wednesday too i was surprised. i might go up friday to redeem myself you interested?
Specification Sidewall Radius Diameter Circumference Revolutions Speedometer Odometer Difference
215/45-18 3.8" 12.8" 25.6" 80.5" 787/mi 60MPH 10000mi N/A
225/50-16 4.4" 12.4" 24.9" 78.1" 811/mi 62MPH 10306mi -3.0%
225/55-16 4.9" 12.9" 25.7" 80.9" 783/mi 60MPH 9951mi 0.5%
245/50-16 4.8" 12.8" 25.6" 80.6" 786/mi 60MPH 9989mi 0.1%
225/55/16 is closer to stock, but I like 245/50/16 from Nitto. I'd get their drag radial if and when I get some.
i was trying to shift right around 55-5800. but i think i'm just gonna try not lifting off the gas. ive been doin that on the way to work and it seems smoother and faster.
Speed3Rookie
Member
(I/MM) forge bpv and shifter bushings
yeah it did. it was like 47 degrees on my last run. i was so pumped but determined to hit a 13 after hittin the 14.0 but i bogged the start which led to a 14.4
FMOS Racing
Member
- :
- 2008 MS3, plus a pickup and a beater car
Getting better at getting it moving the the heavy ricey wheels. Had a 13.72@103 with a 2.12 60' on those anvils.
Out of 14 passes, about 8 of the them in the 13s, the rest were 14.0s except for one where I accidentally left the traction control on - it was a 14.29, which really surprised me. The last time I did that I ran a 16.2 IIRC. I was really mean to my buddy's brand new Mini S.
I did notice one condition where the heat soak in the stock intercooler is repeatable, and thats on a long crawl through staging to the lanes. If I can hot lap, I think things stay nice and cool, but when I have to creep forward for 20 minutes, a car length at the time, mph drops by a fairly repeatable 1.5 or so.
JDM - there was a MS3 at my track (IRP) last Tuesday running in the 16s, so don't feel too badly. There was also a new Cobalt SS and the Saturn equivalent there, both running mid 14s@101. Looks like they're pretty decent competition for a MS3.
Oh, it's probably worth mentioning that I beat a C5 Z06 twice.
Out of 14 passes, about 8 of the them in the 13s, the rest were 14.0s except for one where I accidentally left the traction control on - it was a 14.29, which really surprised me. The last time I did that I ran a 16.2 IIRC. I was really mean to my buddy's brand new Mini S.
I did notice one condition where the heat soak in the stock intercooler is repeatable, and thats on a long crawl through staging to the lanes. If I can hot lap, I think things stay nice and cool, but when I have to creep forward for 20 minutes, a car length at the time, mph drops by a fairly repeatable 1.5 or so.
JDM - there was a MS3 at my track (IRP) last Tuesday running in the 16s, so don't feel too badly. There was also a new Cobalt SS and the Saturn equivalent there, both running mid 14s@101. Looks like they're pretty decent competition for a MS3.
Oh, it's probably worth mentioning that I beat a C5 Z06 twice.
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