LQ9 piston to valve clearance
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Teching In
Joined: Feb 2022
Posts: 3
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LQ9 piston to valve clearance Currently building LQ9 have a set of 243 heads was thinking about running Comp 45-469-11 cam
intake duration 281
exhaust duration 247
LSA 113
int. Lift .624
exh. Lift.617
with factory rockers.
I was wondering if I will have issues with piston to valve clearance ?
intake duration 281
exhaust duration 247
LSA 113
int. Lift .624
exh. Lift.617
with factory rockers.
I was wondering if I will have issues with piston to valve clearance ?
TECH Senior Member
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
Are you sure about those duration numbers?? You have WAY more intake duration than exhaust, and that shouldn't be.
Edit- the cam is 54-469-11, and the duration is 281/297, lift is .617/624.
You might edit your post to reflect the correct specs
Edit- the cam is 54-469-11, and the duration is 281/297, lift is .617/624.
You might edit your post to reflect the correct specs
Last edited by G Atsma; Feb 14, 2022 at 06:52 PM.
Could it be 54-469-11 that Richard Holdener runs in practically everything? 231/247 @ .050
What type of piston? Does it have valve reliefs?
6-0l-piston-questions-ls3-heads-w-comp-54-469-11
This may have some helpful information.
TECH Senior Member
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
I can't find #45-469-11 any where.
Could it be 54-469-11 that Richard Holdener runs in practically everything? 231/247 @ .050
What type of piston? Does it have valve reliefs?
6-0l-piston-questions-ls3-heads-w-comp-54-469-11
This may have some helpful information.
Could it be 54-469-11 that Richard Holdener runs in practically everything? 231/247 @ .050
What type of piston? Does it have valve reliefs?
6-0l-piston-questions-ls3-heads-w-comp-54-469-11
This may have some helpful information.
