fastest gm847 cars
07-31-2006, 06:29 PM
#18
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Join Date: May 2002
Location: Saskatchewan, Canada
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Re: fastest gm847 cars
Originally Posted by calfirebird
Mine with Le2 heads makes 417rwhp with a 2800 and all i can manage is 11.80 at 115. with 342s out back. It also has the 847 cam. with stock suspension. I know the car can run faster but why am i 4-5 mph slower? Yea tq management is a mother of an issue.
07-31-2006, 06:45 PM
#21
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Join Date: Apr 2006
Location: B'ville
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Re: fastest gm847 cars
The weight has alot to do with it, the lighter the car the faster it goes. I guess it's all in the combination gears, trans, tunning etc.. etc... I also plan on running a simular set up as jeffs. Mine will be a 383 or a 357 with the LE3 heads and cam which is bigger than the GM847. I just hope to run simular times.
07-31-2006, 09:29 PM
#23
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Join Date: Oct 2003
Location: Chicago, IL
Posts: 739
Re: fastest gm847 cars
Excellent info.. My car is a fat pig and needs a diet i think with that and a 12 bolt i can see 11's in the future, But now I wanna throw some ported Trick flows on and see what this stock bottom end can do with the 847.
Last edited by My Iroc Z28; 07-31-2006 at 09:32 PM.
07-31-2006, 09:54 PM
#25
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Join Date: Apr 2006
Location: B'ville
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Re: fastest gm847 cars
I'm going with a tubular K-member with the a-arms BMR claims that with this set up with Qa1 shocks and lighter brake system you can loose up to about 100lbs that's alot of weight. I assume that a standard Z28 weighs about 3500lbs. Remove bumper supports, and all the other stuff not needed and you can weigh in a 3400 to 3300lbs.
08-01-2006, 08:32 AM
#27
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Location: Oklahoma where trees are made of wood.
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Re: fastest gm847 cars
Originally Posted by calfirebird
Mine with Le2 heads makes 417rwhp with a 2800 and all i can manage is 11.80 at 115. with 342s out back. It also has the 847 cam. with stock suspension. I know the car can run faster but why am i 4-5 mph slower? Yea tq management is a mother of an issue.
I guarantee you will gain 3 mph just from going to 3.73s. Also you'd probably gain a tenth or 2 in the 1/4 as well.
3.42s lug the motor too much for this cam.
08-01-2006, 09:56 AM
#28
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Join Date: Sep 2002
Location: tulsa ok
Posts: 490
Re: fastest gm847 cars
Originally Posted by WS Sick
The biggest Obstacle my car has is that my present motor only has about 9.8:1 compression. I know Jeff has closer to 12:1 and his car is lightened.
also had 12.43:1 comp and 10.3 DCR flat top pistons
08-01-2006, 10:00 AM
#29
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Join Date: Sep 2002
Location: tulsa ok
Posts: 490
Re: fastest gm847 cars
Originally Posted by Jlo
Here is one of his vid's on LS1Tech, it's one of my favorites hands down, I just like this car alot looks awsome
Great job jeff. What clutch are you using??
http://www.ls1tech.com/forums/showthread.php?t=260288
click on the car pictue on the bottom.
Great job jeff. What clutch are you using??http://www.ls1tech.com/forums/showthread.php?t=260288
click on the car pictue on the bottom.
car prob weighed close to 3200-3300 with me in it and no roll bar
all BMR front to rear r-series qa1's comp eng rear shocks
08-01-2006, 10:02 AM
#30
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Join Date: Dec 2003
Location: Oklahoma where trees are made of wood.
Posts: 2,725
Re: fastest gm847 cars
Originally Posted by Z284thgen
it was on oct 30 when it did its best
I was thinking you ran a really really low 11 in the heat.