Valve train help!

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Feb 3, 2009 | 06:45 PM

BoostJunkieXL

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From: Lake Jackson, Tx

Valve train help!

Alright all you LSx Guru's...I need help selecting the right brand/size valves for my heads. I'm still up in the air about what heads I'm going to use. I got a set of 853's I was thinking about having ported but I also found a set from an LS2. I am going to use a Comp Cams XR275HR-12 cam and comp 918 springs. Someone help me out here! Thanks!

Last edited by BoostJunkieXL; Feb 3, 2009 at 07:00 PM.

Feb 3, 2009 | 09:58 PM

JPH

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Ferrea or Manley. 2.02/1.57 with the LS2s.

Last edited by JPH; Feb 3, 2009 at 10:06 PM.

Feb 3, 2009 | 10:04 PM

sidewayz28

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From: seattle

use the ls2 heads..

Feb 4, 2009 | 03:13 AM

Chris10an

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From: Norway

The Gm 317 heads is exelent, spes if you going to use blower or turbo.

Feb 4, 2009 | 04:29 PM

IWGF

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From: Aztec, NM

Quote:

Ferrea or Manley. 2.02/1.57 with the LS2s.

What this guy said... Ferrea is some good stuff.

Feb 4, 2009 | 04:51 PM

elias_799

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From: toronto ontario canada

Quote:

Originally Posted by Chris10an

The Gm 317 heads is exelent, spes if you going to use blower or turbo.

+1. if you want to lower your cr get some 317's they also flow better then the 241 heads.

Feb 4, 2009 | 07:00 PM

BoostJunkieXL

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From: Lake Jackson, Tx

ok...So say I buy the LS2 heads...I was told that on an LS1 block there may be piston to valve clearance issues. Is this true? Also, would I use LS1 or LS2 head, intake and exhaust gaskets? What about intake manifolds? Would the stock LS1/LS6 mainfold work? Sorry for so many questions...I'm a newbie to the LSx nation! Thanks for all the help guys!!

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Feb 4, 2009 | 11:40 PM

BoostJunkieXL

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From: Lake Jackson, Tx

N/A for now. Planning on going turbo in the near future.

Feb 5, 2009 | 10:19 PM

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elias_799

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From: toronto ontario canada

the get the 317 heads. you don't want to raise the CR any more for a FI application. good luck

Feb 6, 2009 | 06:46 PM

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BoostJunkieXL

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From: Lake Jackson, Tx

Will I lose power with the slight drop in Compression?

Feb 6, 2009 | 11:31 PM

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elias_799

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From: toronto ontario canada

if you are going to stay na for a while, yes you will loose hp with lower cr. but if you go fi then it will help you run more boost on pump gas reliably. good luck