Milling L92 question's
Milling L92 question's How much can you safely mill L92 heads for a ly6 for more compression b4 you have problems?
my local speed shop said around 20thou? sound about rite?
my cam is a 226/234/.602 and my pushrod length is 7.425
my local speed shop said around 20thou? sound about rite?
my cam is a 226/234/.602 and my pushrod length is 7.425
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Well i sent pat g a email on this subject here is his reply.
"Rick,
I wouldn't mill too much...maybe .010". P to V is tight with no valve
reliefs.
Geoff"
i have decided not to cut in the future i might do a 408 untill then there going to stay stock.
"Rick,
I wouldn't mill too much...maybe .010". P to V is tight with no valve
reliefs.
Geoff"
i have decided not to cut in the future i might do a 408 untill then there going to stay stock.
Joined: Jul 2005
Posts: 531
Likes: 1
From: Texas, Europe, Iraq & Afghanistan
I have always wondered this. I once considered a set of L92 heads but the vendors were reluctant to mill to anything less than 62cc saying the flow is disrupted and the chamber would need rebuilding. But, my thought is that a shallow chamber gets the valve into the larger cylinder area earlier where flow is unrestricted. Maybe it is a turbulence thing.
My LS6 style heads have 53cc chambers and I run like 12.2:1 static and 8.5 dynamic. In the past, the ET Heads people offered chambers as small as 35cc I believe.
With this I am not including the issue of deck thickness or warping because it was mentioned, but not considered a factor for a N/A engine without extreme compression. I have had no head gasket/sealing issues. P/V clearance and push rod length should also be ignored for argument. They are adjusted and fine.
I'm just throwing this in the mix for conversation.
Thanks!
My LS6 style heads have 53cc chambers and I run like 12.2:1 static and 8.5 dynamic. In the past, the ET Heads people offered chambers as small as 35cc I believe.
With this I am not including the issue of deck thickness or warping because it was mentioned, but not considered a factor for a N/A engine without extreme compression. I have had no head gasket/sealing issues. P/V clearance and push rod length should also be ignored for argument. They are adjusted and fine.
I'm just throwing this in the mix for conversation.
Thanks!
I am opposite of you all lol. I am saving for the stage 3 l92 west coast cylinder heads and I'm looking to open the chambers up. If I remember right rich said they can open up to a 75cc chamber.
I's guess that you're talking to me lol.
Because of my setup and to get the CR that I want I need a larger chamber. If I go the other route and dish the pistons to get the desired CR, that would make them to thin and top ring land to weak.
Because of my setup and to get the CR that I want I need a larger chamber. If I go the other route and dish the pistons to get the desired CR, that would make them to thin and top ring land to weak.
Teching In
Joined: Jul 2011
Posts: 7
Likes: 0
From: Auckland, New Zealand
Small bore [QUOTE=Gregory;14948669]I have always wondered this. I once considered a set of L92 heads but the vendors were reluctant to mill to anything less than 62cc saying the flow is disrupted and the chamber would need rebuilding. But, my thought is that a shallow chamber gets the valve into the larger cylinder area earlier where flow is unrestricted. Maybe it is a turbulence thing.
I think the 'cylinder area' might be just the problem. On an L92 engine the bore is actually smaller than the chamber in the head. The bore itself shrouds the valve. Cutting the head makes things worse because the valve now goes deeper into the bore.
I think the 'cylinder area' might be just the problem. On an L92 engine the bore is actually smaller than the chamber in the head. The bore itself shrouds the valve. Cutting the head makes things worse because the valve now goes deeper into the bore.
