Building 396 lt1 - LS1TECH - Camaro and Firebird Forum Discussion



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

Building 396 lt1

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Old 01-11-2018, 07:38 PM   #1
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Default Building 396 lt1

This so far the build

3.875 crank forged
6.0 h beam forged forged
-34 pistons

Stock heads so far

Anyone know the what compression will be
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Old 01-11-2018, 09:49 PM   #2
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canít know without cc of your combustion chambers, head gasket thickness and deck height.
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Old 01-12-2018, 12:33 AM   #3
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The deck height very little is being taken. More say just even it up make it even and flat.. the heads should be 54.5 whatever stocks heads. The gasket I want keep this car around 8.8 to 9.0 as it will be running 16 pounds of boost


Sto I remember what deck height will be I know it will be hard to say
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Old 01-12-2018, 12:22 PM   #4
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According to this calculator with a stock deck height you'd be right around 9:1 with a .040 head gasket:

http://www.wallaceracing.com/cr_test2.php
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Old 01-12-2018, 12:36 PM   #5
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Would Happen to know what vavle size I should go with for optima power
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Old 01-12-2018, 01:21 PM   #6
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Nnnnnnnnnnnope. I've never done a FI engine. Two blokes that have are Blackbirdws6 and ShownoMercy who are sometimes on this forum.
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Old 01-12-2018, 01:30 PM   #7
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9.1 still little high maybe cometic has 50 inch gasket I want 8.8


The valves I. Running titiaum intake and stainless exhaust I just need to know what size I should buy to get all power possible
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Old 01-12-2018, 01:31 PM   #8
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What your motor putting out
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Old 01-12-2018, 02:36 PM   #9
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9.1 isnt high, I run 9.4.1 with LT4 heads and at 12lbs of boost my motor makes 806HP...
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Old 01-12-2018, 02:57 PM   #10
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The piston I got are rated at 20 pounds they are diamond blow through pistons i got them gapped at 16 that's the reason why I want it little lower then 9.0 just for peace of mind plus it's going be street /strip car still running intercooled and stage 2 snow system oil cooler. Rated at 650 HP 160 pound injectors

I just need to know a good vavle size to go with
My t56 will probably blow up. But will worry about that when it does
500+ fuel pump

Also what what supercharger crank dampener I called ATI
they werent sure if it works with vortec super charger

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Old 01-12-2018, 04:40 PM   #11
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Quote:
Originally Posted by Lsp Przy View Post
What your motor putting out
Heads/cam 396. Nothing special.
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Originally Posted by Lsp Przy View Post
9.1 still little high maybe cometic has 50 inch gasket I want 8.8
Keep your quench as tight as possible. If you are wanting less CR then use a different piston or get the chambers worked over.
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9.1 isnt high, I run 9.4.1 with LT4 heads and at 12lbs of boost my motor makes 806HP...
And yeah, this ******' guy knows some ****.
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Old 01-12-2018, 06:26 PM   #12
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Yea I'm talking to Loyd on his trick flow heads ported for stroker blower app let him do the cam too

I have 1.7 rockers scropion hopefully Loyd can put the heads and bigger vavles where I like it
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Old 01-13-2018, 02:59 AM   #13
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Quote:
Originally Posted by Lsp Przy View Post
..........I want keep this car around 8.8 to 9.0 as it will be running 16 pounds of boost..........
With that much boost, I would do a 383ci (maybe even a 355) before going with a 396ci.

But that's just me.

KW
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Old 01-13-2018, 05:50 PM   #14
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I had a budget cast boosted 383 that went 137+mph in the 1/4 at 3850lb with stock (cleaned casting flash) heads with stock sized Manley valves. I was told a good 5 angle valve job was as important as valve size.
I'd just let Loyd decide. He is a master.
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