LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What are your seat pressures?

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Old 02-23-2008, 08:35 PM
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What are your seat pressures?

What are you running on the seat for your hyd. cams?

Just wondering what everyone is running on average.....I'm about to try something
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Old 02-23-2008, 09:10 PM
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im running 135 w/ the 847.
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Old 02-23-2008, 09:53 PM
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I'm running 165#. Had a pretty big Hydraulic cam in mine, swapping it out to a solid roller now. Hyrdaulic specs are 625/576 lift duration is 236/242. And get this I was running Comp R's and did not have a single one that failed in the past three years. I was expecting to see some broken but I found everyone to be perfectly fine.
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Old 02-23-2008, 10:02 PM
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175 @ 1.95 installed height.
450 or 475 psi (cant remember now) @ .6 lift

on stock lifters... never a problem...
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Old 02-23-2008, 10:19 PM
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Originally Posted by mdacton
What are you running on the seat for your hyd. cams?

Just wondering what everyone is running on average.....I'm about to try something
ur **** is a turd.
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Old 02-23-2008, 10:42 PM
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Originally Posted by SS RRR
ur **** is a turd.
[zrated94] You are a phony and your car doesn't exist [/zrated94]




Oh and to the OP it might help if you tell us what your valvetrain setup is going to be (cam and lobes, ect.)

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Old 02-24-2008, 06:41 AM
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[QUOTE=speed_demon24;5203620Oh and to the OP it might help if you tell us what your valvetrain setup is going to be (cam and lobes, ect.)[/QUOTE]

Its all top secret, and not my car....I have 260 on the seat

But I was going to run a spring I used a long time ago that has a light seat but its strong open, its only 135 or so on the seat
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Old 02-24-2008, 06:03 PM
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PAC1218s at ~140.
1.75"
GM847
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Old 02-25-2008, 05:19 PM
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Originally Posted by 11secgen
im running 135 w/ the 847.
Man your skinny. I'm 175. So my driver seat pressure is 175.
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Old 02-25-2008, 05:24 PM
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Well checked the springs, they are more like 160# on the seat 430# open
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Old 02-25-2008, 05:44 PM
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wait, that was a typo, i meant 185 lbs@ 1.78,385 1.20 and 465 at max vale lift.i had to check my spring card from p.s.i.
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Old 02-25-2008, 05:57 PM
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260 closed and 660 open. But it is a solid roller.
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Old 02-25-2008, 06:41 PM
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Originally Posted by jakesz28
260 closed and 660 open. But it is a solid roller.
yeah so thanks for nothing
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Old 02-25-2008, 07:50 PM
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Sorry had to dig thru some paper work 138# closed 325# open is what was in the old motor.
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Old 02-25-2008, 10:43 PM
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Check the Valve Spring Chart in my sig if you want to see a bunch of
common HR springs in use by the LT1 crowd. I'm using the Crane 96872s
at 1.82" closed and 1.27" open.

I still don't see the point in your vague question.

Last edited by truedualws6; 02-25-2008 at 10:47 PM.
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