LS3 stroker w/cathedral cam?
LS3 stroker w/cathedral cam? I'm swapping over to an LS3 top end and wondering how far off my current cam specs are for an LS3 head.
Current cam is a 239/246 - .624/.595 - 113+2 which was spec'd for a daily driver 400 inch motor with cathedrals (driveability has been excellent).
Now going to Stock LS3 0821 heads - planning to mill about 50 - 60 thou to retain 11.2 scr.
I'd like to go Low-lash solid but can't afford the conversion right now. Rather than buy a new hydraulic cam spec'd around LS3 I'd rather run what I have and
save my pennies for later.
How much power do you think I might be leaving behind with the current cam vs. an appropriately spec'd HYD cam?
Current cam is a 239/246 - .624/.595 - 113+2 which was spec'd for a daily driver 400 inch motor with cathedrals (driveability has been excellent).
Now going to Stock LS3 0821 heads - planning to mill about 50 - 60 thou to retain 11.2 scr.
I'd like to go Low-lash solid but can't afford the conversion right now. Rather than buy a new hydraulic cam spec'd around LS3 I'd rather run what I have and
save my pennies for later.
How much power do you think I might be leaving behind with the current cam vs. an appropriately spec'd HYD cam?
TECH Enthusiast
Joined: Jul 2012
Posts: 552
Likes: 1
I'm swapping over to an LS3 top end and wondering how far off my current cam specs are for an LS3 head.
Current cam is a 239/246 - .624/.595 - 113+2 which was spec'd for a daily driver 400 inch motor with cathedrals (driveability has been excellent).
Now going to Stock LS3 0821 heads - planning to mill about 50 - 60 thou to retain 11.2 scr.
I'd like to go Low-lash solid but can't afford the conversion right now. Rather than buy a new hydraulic cam spec'd around LS3 I'd rather run what I have and
save my pennies for later.
How much power do you think I might be leaving behind with the current cam vs. an appropriately spec'd HYD cam?
Current cam is a 239/246 - .624/.595 - 113+2 which was spec'd for a daily driver 400 inch motor with cathedrals (driveability has been excellent).
Now going to Stock LS3 0821 heads - planning to mill about 50 - 60 thou to retain 11.2 scr.
I'd like to go Low-lash solid but can't afford the conversion right now. Rather than buy a new hydraulic cam spec'd around LS3 I'd rather run what I have and
save my pennies for later.
How much power do you think I might be leaving behind with the current cam vs. an appropriately spec'd HYD cam?
I found the article, I hope this helps you.
http://www.superchevy.com/how-to/ght...-head-to-head/
Launching!
Joined: Dec 2014
Posts: 235
Likes: 0
From: Leesburg, Virginia
With that cam I wouldn't be too worried. The ls3 heads love a big split, but if you're interested in a LLSR, I'd run what you have for now and get a new cam spec'd once you're ready. You'd leave more on the table not going to a solid imo.
heads up... You will be good with that cam with ls3 heads and it should make power above the cathedrals.
You'll see a tenth of a point of compression gain for every 5.8 thousands milled off 69 cc chamber heads.
You'll see a tenth of a point of compression gain for every 5.8 thousands milled off 69 cc chamber heads.
Trending Topics
Joined: Jul 2007
Posts: 1,502
Likes: 177
From: ELSA, South TEXAS (956) 802-7700
I run a 6 degree split cat cam in my lq9 with ls3 heads and love it. Yours has a 7 degree split and with some porting on the exhausts can be optimal. I ported my own heads. 
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
