Rev-it up stage one 102.56mph 1/4mi
02-23-2006, 12:58 AM
#1
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Rev-it up stage one 102.56mph 1/4mi
Well I just got back from the track and was quite dissappointed in my clutch, well the old stocker has about had it. Can't wait for the stage 2+. Due to my clutch failure I was unable to post any 13sec runs. I did however increase my MPH to 102.56
r/t : .799...60ft: 2.437...1/4: 14.536...MPH 102.56
That mph should put me into the 13's if I can get a good launch with my new clutch which is possible. My 60ft sucked and my reaction time sucked it would help a lot if the clutch worked instantly. I started launching the car at 2500rpms but I was not coming out the hole quick enough. The next launch I choose 3500rpms which was the 102.56 run. THe next run I launched at 4000rpms and fried the clutch more. The clutch slippage probally cost me .3-.4sec per run.
Boost is at 10psi @ 3000rpms and goes to 15psi at around 5k with the 2.9"pully. Won't be able to do anymore testing till the new clutch arrives, but as soon as it does back to the track to post some 13's. With a 2.00 60ft a 13.7 is feasible.
Oh yea its 75 degrees and humity is very high 90%. Superchargers don't like warm humid air.
DR's set to 25psi.
r/t : .799...60ft: 2.437...1/4: 14.536...MPH 102.56
That mph should put me into the 13's if I can get a good launch with my new clutch which is possible. My 60ft sucked and my reaction time sucked it would help a lot if the clutch worked instantly. I started launching the car at 2500rpms but I was not coming out the hole quick enough. The next launch I choose 3500rpms which was the 102.56 run. THe next run I launched at 4000rpms and fried the clutch more. The clutch slippage probally cost me .3-.4sec per run.
Boost is at 10psi @ 3000rpms and goes to 15psi at around 5k with the 2.9"pully. Won't be able to do anymore testing till the new clutch arrives, but as soon as it does back to the track to post some 13's. With a 2.00 60ft a 13.7 is feasible.
Oh yea its 75 degrees and humity is very high 90%. Superchargers don't like warm humid air.
DR's set to 25psi.
Last edited by BoomInIt; 02-23-2006 at 01:18 AM.
02-23-2006, 01:23 AM
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Sucks about the clutch, maybe this is why gm is holding off on the stage kits, they are waiting until they build enough replacement clutches for all the ones that we are going to burn up 
. Did you spin your wheels at all while launching since you launched at such a hig rpm?
. Did you spin your wheels at all while launching since you launched at such a hig rpm?
02-23-2006, 01:24 AM
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Originally Posted by gonzo
Sucks about the clutch, maybe this is why gm is holding off on the stage kits, they are waiting until they build enough replacement clutches for all the ones that we are going to burn up . Did you spin your wheels at all while launching since you launched at such a hig rpm?
. Did you spin your wheels at all while launching since you launched at such a hig rpm?
02-23-2006, 01:34 AM
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Originally Posted by gonzo
Sucks about the clutch, maybe this is why gm is holding off on the stage kits, they are waiting until they build enough replacement clutches for all the ones that we are going to burn up . Did you spin your wheels at all while launching since you launched at such a hig rpm?
. Did you spin your wheels at all while launching since you launched at such a hig rpm?
02-23-2006, 08:38 AM
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Originally Posted by R33P3R007
I was going to say, with a better launch that speed should be good for high 13's. Since I ran a 14.52 at 99.96
Dan
02-23-2006, 08:50 AM
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You are making some good power with a 102mph trap.
Figure a curb weight of roughly 3160lbs with you in it would equal about 265whp at say 16% drivetrain loss that is 306 crank HP.
Figure a curb weight of roughly 3160lbs with you in it would equal about 265whp at say 16% drivetrain loss that is 306 crank HP.
Last edited by Twincharged; 02-23-2006 at 09:17 AM.
02-23-2006, 08:58 AM
#13
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These cars have bad traction issues. I mean some people trap as high as 98-99 stock (from what i've read about on these forums) and they are aonly getting like 14.6-14.8's with 2.4-2.5 60' times. If you were to put drag radials on a stock cobalt ss/sc, I really belive that the car could do 14.0 flat.
02-23-2006, 10:37 AM
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Originally Posted by djt81185
wait so which pulley did you use. You stated 2.9 in the post but your profile says 2.7. I'm confused but awesome trap speed man.
Dan
Dan
Gonna try and get my time slip scanned today.
02-23-2006, 10:44 AM
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Originally Posted by djt81185
I think he can go deeper than high 13s. I ran a 14.40 @ 96.6 adding 7mph is a pretty big accomplishment.
Dan
Dan
i was just saying... my 99.96 was stock.
02-23-2006, 10:56 AM
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Originally Posted by BoomInIt
r/t : .799...60ft: 2.437...1/4: 14.536...MPH 102.56
02-23-2006, 11:01 AM
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Nice MPH! At that speed with a good 60' you should hit a 13.6-13.7
Not sure why you didn't run the 2.8 though
Tried to tell everyone the stock clutch will NEVER hold once you get traction!
Not sure why you didn't run the 2.8 though
Tried to tell everyone the stock clutch will NEVER hold once you get traction!
02-23-2006, 07:27 PM
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its all on the driving our cobalt ss driven by my wife with stage 1 has stock clutch and no signs of giving up on us.
our redline driven by mike and his fiance has stage 1 but the clutch is starting to give. they have 16kmiles on it our cobalt has 6k and is a year old
our redline driven by mike and his fiance has stage 1 but the clutch is starting to give. they have 16kmiles on it our cobalt has 6k and is a year old
02-23-2006, 07:51 PM
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Sweet boom. I may have some track times this weekend my self. Etown opens this weekend. I'll be on stock tires don't want to blow my clutch. I want stage 2 from rev it up first than I change my clutch.
Hey ray how come my boost gauge doesn't read more than 12 lbs of boost. I do have the bypass mod. Thanks
Joe
Hey ray how come my boost gauge doesn't read more than 12 lbs of boost. I do have the bypass mod. Thanks
Joe
02-23-2006, 07:55 PM
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Originally Posted by JAESS
Sweet boom. I may have some track times this weekend my self. Etown opens this weekend. I'll be on stock tires don't want to blow my clutch. I want stage 2 from rev it up first than I change my clutch.
Hey ray how come my boost gauge doesn't read more than 12 lbs of boost. I do have the bypass mod. Thanks
Joe
Hey ray how come my boost gauge doesn't read more than 12 lbs of boost. I do have the bypass mod. Thanks
Joe
gm was a lil gay wit their boost gauge design and it is pcm controlled. chage to a mechanical
02-23-2006, 10:35 PM
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went to the 1/8 th mile and got
rt .600
330ft 6.1
60 ft 2.147
1/8 9.217 @79.95 mph
spining throu second lots of room for improvment ......going sat and hope to have a little juice .....
and at least 8.5
rt .600
330ft 6.1
60 ft 2.147
1/8 9.217 @79.95 mph
spining throu second lots of room for improvment ......going sat and hope to have a little juice .....
and at least 8.5