LT1-LT4 Modifications 1993-97 Gen II Small Block V8

First time at the 1/8th mile - Times inside

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Old 06-25-2012, 03:25 PM
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keep in mind guys with a 5200ft elevation his number will be no were close to what most people run. and i am sure his corrected altitude is worse than 5200ft
hes supercharged (makes his own air)

He shouldnt be much slower, atleast not like a n/a 500ft vs n/a at 5200ft. May be slower, but shouldnt be by much. Thats one of the beauties of forced induction
Old 06-25-2012, 03:51 PM
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Originally Posted by trilkb
hes supercharged (makes his own air)

He shouldnt be much slower, atleast not like a n/a 500ft vs n/a at 5200ft. May be slower, but shouldnt be by much. Thats one of the beauties of forced induction
Old 06-25-2012, 04:48 PM
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Originally Posted by Badazz 97 TA
Correct, time doesnt start until you cross the line. Shift at like 6000 minimum. shifting at 5 is way too low.
6000 would be way too much for a stock car. The problem is that with stock valves springs the extra 4 lbs of boost on the valves reduces the amount of delta spring pressure to control the valve properly. With it being that the springs already (typically) have lost some of there spring rate as it is, the problem only worsens. 5000 is probably past the limit or right at it.
Old 06-25-2012, 04:54 PM
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Hell Ive been wrong befor lol.

If his diverter valve is 4 psi and its making more then 4psi, wouldnt it not be affected?

Its probably more complicated then that. Whatever, chalk that one up as talking out of my ***

Last edited by trilkb; 06-25-2012 at 05:22 PM.
Old 06-25-2012, 05:30 PM
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Originally Posted by nitrous2fast
6000 would be way too much for a stock car. The problem is that with stock valves springs the extra 4 lbs of boost on the valves reduces the amount of delta spring pressure to control the valve properly. With it being that the springs already (typically) have lost some of there spring rate as it is, the problem only worsens. 5000 is probably past the limit or right at it.
This^

Thats what i was afraid of. The car stilll felt strong at 5k rpm.

Not that this would be my first choice of action on my car considering there are 1000million things i could do first and be more beneficial, but would the AFR "Hydra rev" thing aid this? Or is that something completely off base.
Old 06-25-2012, 06:28 PM
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just a good spring upgrade would be beneficial...
the patriot extreme spring kit might be just up your alley...
well any good spring kit will help.
Old 06-25-2012, 06:34 PM
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Originally Posted by BigBadWhitey
This^

Thats what i was afraid of. The car stilll felt strong at 5k rpm.

Not that this would be my first choice of action on my car considering there are 1000million things i could do first and be more beneficial, but would the AFR "Hydra rev" thing aid this? Or is that something completely off base.
rev kits work but in your situation you would be better off picking a good valve spring pkg. and imo 4 psi of boost is not going to have any real affect on valve float.
Old 06-25-2012, 06:49 PM
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thats 11lbs off the seat.... thats like going from a 120# seat spring to a 110# seat. If you dont think that matters from 5500 to 6500 rpm then you are crazy.
Old 06-25-2012, 07:05 PM
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Originally Posted by nitrous2fast
thats 11lbs off the seat.... thats like going from a 120# seat spring to a 110# seat. If you dont think that matters from 5500 to 6500 rpm then you are crazy.
There are dynamics going on on both sides of the valve not just one side.
Old 06-25-2012, 07:11 PM
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Originally Posted by BIGCAT7274
There are dynamics going on on both sides of the valve not just one side.
Im no stranger to boosted vehicles....
Old 06-27-2012, 12:31 AM
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So for my rolling issue, ive been looking into a line lock/roll control. They seem pretty cheap at around 100$ locally, and im in the process of doing c5 brakes anyways so if i gotta bleed them, might as well do it all at once?
Old 06-27-2012, 06:56 AM
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Not sure why you'd be rolling at the start unless the pad is uneven or your clutch is dragging? I've always used my e-brake if launching on an uneven surface. Works well.
Old 06-27-2012, 11:17 AM
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The pad there is uneven. Its not raelly a big name race track, only has a few races a year so its not spectacular. The pads have a slight decline and the track has about a 1% grade incline.



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