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

Large duration cam guys in here

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Old 08-30-2008, 03:58 PM
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Default Large duration cam guys in here

How big are you going and what kind of numbers are you making? Track and dyno. You can elaborate as much as you wish i.e heads, intakes, and supporting mods. Trying to get an idea of what a current project should make. The cam is 248/252 with some AI heads. TIA
Old 08-30-2008, 04:06 PM
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mine is 264/271 it made 451rwhp through a 12 bolt,th400 and a 5200 converter
the 451 rwhp was at only 7000 rpm where the stock computer gave out
I know when the cam was in Steve Quins motor he used to spin it to 8500 and ran 9.7 with it N/A

248/252 sounds like the Joe Overton cam I had before this one and made crap power
Old 08-30-2008, 04:17 PM
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Time for an aftermarket computer!!
Old 08-30-2008, 04:30 PM
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Originally Posted by Dave J
mine is 264/271 it made 451rwhp through a 12 bolt,th400 and a 5200 converter
the 451 rwhp was at only 7000 rpm where the stock computer gave out
I know when the cam was in Steve Quins motor he used to spin it to 8500 and ran 9.7 with it N/A

248/252 sounds like the Joe Overton cam I had before this one and made crap power
I see your solid roller with the new cam. We're just starting on a solid roller 396 for a track car. Hope we have better luck than you did with this cam. It's a cammotions grind. What LSA was it and what heads were you using?
Old 08-30-2008, 04:40 PM
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Originally Posted by UDNTCME
I see your solid roller with the new cam. We're just starting on a solid roller 396 for a track car. Hope we have better luck than you did with this cam. It's a cammotions grind. What LSA was it and what heads were you using?
It was 109 lsa I think and small lift high 590`s
it was cam motions also and I was using afr 210 heads that I have now(wish I went afr 227 now)
I make 70 rwhp more with this cam
same everything only the cam change
Old 08-30-2008, 05:20 PM
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Dave, who did Squinn's cam for him, back then? (design/grind it)
Old 08-30-2008, 05:28 PM
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Originally Posted by Dave J
It was 109 lsa I think and small lift high 590`s
it was cam motions also and I was using afr 210 heads that I have now(wish I went afr 227 now)
I make 70 rwhp more with this cam
same everything only the cam change
Sounds good. This one is 609 613 lift.
Old 08-30-2008, 06:09 PM
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242 duration, 610 lift,stock casting heads.
Old 08-30-2008, 06:22 PM
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Originally Posted by flyinZ
242 duration, 610 lift,stock casting heads.
Any numbers?
Old 08-30-2008, 07:25 PM
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246/254 .613/.590 112 installed on a 108....ran 11.3 @ 119 NA and 10.4 @ 130 on a 150 shot...dyno'd 390 NA and 500 on the 150.....swapped the LT1 castings for AFR 227's, and made 410 NA, 529 on a 100 shot, and 63x on 200.

My car has never dyno'd well with the Auto....for reference it dyno'd 422/447 with a 222/228 .544/.538 112 with a 6 speed...swapped in the auto and ran 11.6's...swapped in the 246/254 and picked up .3 NA and .5 on the bottle
Old 08-30-2008, 09:51 PM
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Originally Posted by UDNTCME
Any numbers?
387/387,and thats with an M6 w/McLeod Twin Disk clutch, steel flywheel, and a S60 rear, 35 spline axles..Dont feel bad Ray, me either

Im going to the track in a week or two, so i'll let ya know, then.
Old 08-31-2008, 08:33 AM
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I went 10.50 @ 3200 lbs N/A with a stock lift cam 260/266 @ .050. The heads were blueprinted, unported stock castings. Stock stroke and .060 bore.
Old 08-31-2008, 09:24 AM
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Originally Posted by GIZMO
I went 10.50 @ 3200 lbs N/A with a stock lift cam 260/266 @ .050. The heads were blueprinted, unported stock castings. Stock stroke and .060 bore.
superstock?
Old 08-31-2008, 01:18 PM
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Originally Posted by Dave J
superstock?
Stock Eliminator.



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