Valve to piston clearance??

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Jul 21, 2002 | 01:27 AM

Chris81

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From: Midland, Tx

Valve to piston clearance??

Hello, i was just wondering what lift you have to start worrying about valve to piston clearance if there is any, me and my dad have been trying to learn as much as possible about the LS1 since we just bought one not long ago and that topic has been bugging my dad, i figured i would try this site since most of you guys know what you are doing and could probably answer our question...

Thanks

Chris

Jul 21, 2002 | 04:55 AM

AlonzoVersion 1.0

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From: Fort Worth,TX

Re: Valve to piston clearance??

I have 5.7 heads and my cam specs are 227/227 dur .599/.599 lift 111lsa and I have no piston to valve clearance.Also my heads are milled .030 thous and I have thinner heads gaskets .050 I beleive they are.On stock heads I wouldnt go past 232 duration and 600 lift area but thats just me though.

Jul 21, 2002 | 09:48 AM

MDL-01C5

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Re: Valve to piston clearance??

Alonzo-- did you actually measure your clearance?
Do you have the minimum 100 thousanths?
Thanks <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
Oh yeah...what size valves you using--that's important...

Jul 21, 2002 | 10:43 AM

Chris81

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Re: Valve to piston clearance??

so, should there be 100 thousandths clearance?

Jul 21, 2002 | 04:05 PM

Chris81

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Re: Valve to piston clearance??

ok cool, thanks for the input guys <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Jul 21, 2002 | 04:19 PM

DriveATransAm

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Re: Valve to piston clearance??

i found out that the circle base can be smaller on some cams... that means you would need a longer pushrod to offset the smaller base circle. might want to keep that in mind when checking valve clearance/getting p.rods.

Jul 21, 2002 | 05:59 PM

bparker

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Re: Valve to piston clearance??

<blockquote>quote:<hr />Originally posted by DriveATransAm:
i found out that the circle base can be smaller on some cams... that means you would need a longer pushrod to offset the smaller base circle. might want to keep that in mind when checking valve clearance/getting p.rods.<hr /></blockquote>The 2002 Z06 is said to have a smaller inner circle diameter cam - thus I thought it would use/have longer pushrods and when I bent two of them by missing a 4th shift - I checked at the dealer if they 2002 Z06 has longer rods that the LS1s and the part #s are the same..

Weird eh?

I do know that the valves are said to be longer too..

[ July 21, 2002, 06:00 PM: Message edited by: bparker ]