Reaction time has no correlation to the outcome of your 1/4 mile time. It only matters if you are racing another vehicle to the finish line. Then it gets magnified towards the end.
89 octane! is that calculated the same way as it is here in the US (R+M/2)? If so, that could be part of the problem. If the tires were really worn out, that could also cause some loss of grip off the line. Bald street tires are not like slicks!
Mike
Quote:
Originally Posted by BRN64666
More Details
Tires Condition: Need to be replace
Gas : Pump Gas 89
Engine Tep. : Warm
Sound System : Removed
what else ??!!
__________________
Mike
91 M5 Alpine White II, Silver Gray 3/90 production
17x8/17x9 M system with PS2, 20mm touring roll bar; Ground Control Coilovers; EAT Chip, CD43; bmw/nardi blackline steering wheel, 3.8 Cam Gears
08 535i / 6 speed
Space Gray; Gray; Sport/Premium/Nav
00 M5 Ti Silver; Imola/black sportiv --Sold
Engine:
Supersprint Headers, Dinan CAI kit and MAFS, Throttle Bodies, Cams, Ported heads, Exhaust, Custom dinan software, Evosport Pullies, Dinan clutch and lightened flywheel; Ignition solutions plasma coils
Suspension:
Dinan Stage 3 with front and rear Strut Tower Braces, Beastpower Sway bar brackets, Dinan Wheels with 275/285 PilotSport, X5 Thrust arm bushings, Stoptech 355mm 4 piston front, 355mm 2 piston rear brake kit, Dinan 3.45 diff
Interior/Misc:
Eurodash, updated steering wheel, Bluetooth retrofit, Sirius Retrofit, hardwired V1, Widescreen Mk4 nav, M audio retrofit, Ice Link, BSW Stage 1 speaker upgrade, bmw towbar
For the tire pressure was 35 PSI on street stires ...
11C = 52F...that's perfect.
The 2.261 tells me that you did not get a great launch. You should probably be in the 1.9 range. Every 1/10th in 60' time translates to aprox. ... oh, from memory.... 2/10th's in the 1/4 mile...maybe more, I foget exactly. Lets use 2/10th with a 1.9 60' time. That eliminates 6/10th's putting you right in the low 13 second range where you should be.
171.66 kmh = 106.66 mph which is low. You should be at least in the 108 range (and that's stock). So, your shifts were probably not optimal and/or the gas you are using is too low octane. Again, not sure what your gas equates to but I'm sure your chip is optimized for high octane. The chip doesnt seem to be helping you too much.
OHHH...and your wheels. I just noticed you had 19's. You'll loose speed from them. First, they may be heavier than stock. If so, that's and increase in rotating mass. Also the 19" diameter will give you a bit more top end but hurt your sprints. That may be a 1/10th or 2/10th difference.
__________________ The Car: 2002 Alpine White ///M5 / Lemans Blue extended (sport) leather / aluminum trim The Upgrades: Dinan Stg. 1 / Dinan RSB / TCD Sway Bar Brackets / UUC Evo III SSK / UUC DSSR / UUC Tranny mounts / MKIV Nav Unit / JL 500.1 Amp / JL 12w6v2 Sub
Last edited by boostmiser; 12th February 2005 at 23:52.
The 2.261 tells me that you did not get a great launch. You should probably be in the 1.9 range. Every 1/10th in 60' time translates to aprox. ... oh, from memory.... 2/10th's in the 1/4 mile...maybe more, I foget exactly. Lets use 2/10th with a 1.9 60' time. That eliminates 6/10th's putting you right in the low 13 second range where you should be.
171.66 kmh = 106.66 mph which is low. You should be at least in the 108 range (and that's stock). So, your shifts were probably not optimal and/or the gas you are using is too low octane. Again, not sure what your gas equates to but I'm sure your chip is optimized for high octane. The chip doesnt seem to be helping you too much.
OHHH...and your wheels. I just noticed you had 19's. You'll loose speed from them. First, they may be heavier than stock. If so, that's and increase in rotating mass. Also the 19" diameter will give you a bit more top end but hurt your sprints. That may be a 1/10th or 2/10th difference.
You are right .... My ECU upgrade optimized for 99 octane and I was runinng on 89 which is really low octeans .....
for the wheels .... I was testing the car with stock wheels ...not with 19s
One more thing too,
You got to have the revs higher..like 2000-2500.
Problem is you got to slip the clutch almost all of first. atleats a bit to really get a low 60'. Where is ELEVENS... He is the "drag master" in the M5.
Make sure those shifts have no delays. Fast shifts are real important.
good luck.
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