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      10-09-2009, 07:53 PM   #1
krnnerdboy
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1/8 mile results @irwindale

The purpose of getting to the track was to compare stock exhaust vs muffler delete, but unfortunately the night was full of mishaps and a busy night. Lot's of different cars to compare times with that night

My setup...
vmr csl reps 10" wide rears with 275 30/19 dunlop direzzas(no traction)
muffler delete (40lb weight savings)
intake-bmc filter, rpi scoop, streamline elbow
odyssey battery (30lbs weight savings)


my times...out of 3 runs I misshifted one so here are the two. The first launch was at 4500 and dump and second was at 3000 and feathering the clutch

rt 777 573
60' 2.496 2.001
1/8 9.127 8.532
mph 85.05 85.24

I really felt the second time was right in line or even higher w/ what others were getting on dragtimes.com My trap speed was pretty consistent regardless of the launch so I feel I have a pretty good baseline for next week and my stock exhaust.

for comparison...

r35 gtr claimed 600 whp...88 trap w/ no launch(one of the biggest let downs)
e46 m3 stock manual....trapped 80mph and 9.1 (bad driver)
g37s coupe auto...trapped 78 and 9.**
e55 amg 05....8.560 @ 83.31 (I raced him)
05 STI...trapped 80 mph
gallardo spyder....the biggest let down trapped 85 w/ no launch
e90 m3 gigantti supercharged... trapped 92 w/ majpr traction issues
e92 m3 dct.... 89mph trap
ISF ....trapped 84mph
is350 ("intake/exhaust only")....trapped 87 for his bet run, but I figure he was running nitrous.

the reason I paid more attention to the trap was is b/c it has less to with the driver and a better indicator of the car. The 1/8 really is a limitation for our high revving beasts and most other imports who don't have the ground moving torque

What I got out of this experience...
the only cars that were consistent or even driven to the limit were the autos. I can see where people say 80% driver and 20% car, exponentially in the twisties. Regardless I have a lot of respect even for those who live their life in 1/4 mile or 1/8 increments as the adrenaline rush while sitting at the light and the self control exhibited while the adrenaline works against you for the that fraction of a minute.
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      10-16-2009, 04:49 AM   #2
krnnerdboy
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able to get back down to the track again...this time I had my stock exhaust on and was running it for over 200 miles to let the ecu settle...so the question remains as to whether the muffler delete actually makes you lose HP. decide for yourself.

stock exhaust
ET 8.59
mph 83.3
60' 2.001

muffler delete
ET 8.532
mph 85.24
60' 2.001

I wouldn't go as far to say that the muffler delete increased HP but given the noncontrol of the ambient temp, track cond, driver error,etc there certainly doesn't seem to be any loss in HP w/ the muffler delete after giving the dme time to readjust.


saw an e39 540i w/ vf stage I 350 rwhp
ET 9.1
mph 80.2

c5 vette man. mods unknown
et 8.7
mph 83

e90 m3 man (this is a perfect example of a drivers race)
et 8.6
mph 80

f body camaro ss, bolt ons
8.3
80


Overall I'm quite pleased w/ how this little Mroadster was doing in a straightline and to know I'm a decent driver that can pull consistent times. My point was proven and the M won't be hitting the track anymore but my nitroused truck will
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Gone:z4m, boss 302, c6 z06, m6,z3m
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      07-08-2010, 05:14 AM   #3
fr8tdog
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Quote:
Originally Posted by krnnerdboy View Post
able to get back down to the track again...this time I had my stock exhaust on and was running it for over 200 miles to let the ecu settle...so the question remains as to whether the muffler delete actually makes you lose HP. decide for yourself.

stock exhaust
ET 8.59
mph 83.3
60' 2.001

muffler delete
ET 8.532
mph 85.24
60' 2.001

I wouldn't go as far to say that the muffler delete increased HP but given the noncontrol of the ambient temp, track cond, driver error,etc there certainly doesn't seem to be any loss in HP w/ the muffler delete after giving the dme time to readjust.


saw an e39 540i w/ vf stage I 350 rwhp
ET 9.1
mph 80.2

c5 vette man. mods unknown
et 8.7
mph 83

e90 m3 man (this is a perfect example of a drivers race)
et 8.6
mph 80

f body camaro ss, bolt ons
8.3
80


Overall I'm quite pleased w/ how this little Mroadster was doing in a straightline and to know I'm a decent driver that can pull consistent times. My point was proven and the M won't be hitting the track anymore but my nitroused truck will
coll write up and good info When I get my car back from ESS I'll try and get some track info.
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