Stock Cube ls2 build ideas
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On The Tree
Joined: May 2009
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From: Grove City, Oh
Stock Cube ls2 build ideas Like the title says im looking at some possible directions to go next with my car and some help and guidance would be much appreciated.
My car is h/c and sprayed ls2 vette, Im looking to just add forged pistons and rods and all new bearings and stay stock cubic inch.
What would be a good compression ratio to go with? I was thinking i want to get as close to 12.0-1 unless there is a more optomal cr. I will be running the car on e85 so the compression wont be an issue.
I am running stock l92 heads that I plan on porting and milling and I am going to be looking for a new cam as well. The car will also still be sprayed and I will most likely be hitting it with a 200-250 shot.
What do you guys think think I should do cam wise? Im looking to make 500 wheel on motor and if there are any ideas on how more power could be made with this fairly simple set up your info would be appreciated. It is going to be mainly a street car so I dont want anything to radical but im not scared of losing some driveability.
My car is h/c and sprayed ls2 vette, Im looking to just add forged pistons and rods and all new bearings and stay stock cubic inch.
What would be a good compression ratio to go with? I was thinking i want to get as close to 12.0-1 unless there is a more optomal cr. I will be running the car on e85 so the compression wont be an issue.
I am running stock l92 heads that I plan on porting and milling and I am going to be looking for a new cam as well. The car will also still be sprayed and I will most likely be hitting it with a 200-250 shot.
What do you guys think think I should do cam wise? Im looking to make 500 wheel on motor and if there are any ideas on how more power could be made with this fairly simple set up your info would be appreciated. It is going to be mainly a street car so I dont want anything to radical but im not scared of losing some driveability.
Last edited by lilmiller74; May 8, 2013 at 04:11 AM.
Personally i would rather see u send out your 243 heads to get ported/milled. You will get alot more velocity with those heads where the l92's may be too large especially on only a 4.00" bore. With e85 people run as much as 15:1 SCR. Plus from what i have read the ls3/l92 heads don't like a 4.00" bore. They are more effective on a 4.030"+ bore. Just my .02
Personally i would rather see u send out your 243 heads to get ported/milled. You will get alot more velocity with those heads where the l92's may be too large especially on only a 4.00" bore. With e85 people run as much as 15:1 SCR. Plus from what i have read the ls3/l92 heads don't like a 4.00" bore. They are more effective on a 4.030"+ bore. Just my .02
Honestly Casey, When you have the motor out, bore it for a 4.030". Get the valves unshrouded. Find a set of pistons with a small dome to make up for the valve releifs for the L92 valves. Mill the Heads to get the compression up close to 13:1. Have Rick Crawford port them and reshape the valves and get a good 5 or 7 angle valve job. Ditch teh stock valves for a set of ls3 hollow valves. Get Pat G to spec you a custom cam so you can wind it out to 7500 Rpm and let her rip.
This should let you run with IMSTOCK2
Personally i would rather see u send out your 243 heads to get ported/milled. You will get alot more velocity with those heads where the l92's may be too large especially on only a 4.00" bore. With e85 people run as much as 15:1 SCR. Plus from what i have read the ls3/l92 heads don't like a 4.00" bore. They are more effective on a 4.030"+ bore. Just my .02
Air speed in the intake runner is all about how much CFM you can move through a given orifice at a given amount of lift.
I agree about the valve shrouding though as with a 4.00" bore the intake valve is jammed up against the cylinder wall bad between .150"-.350"/.400" valve lift. On a 4.0" bore I'd like to see a maximum of a 2.05" intake valve.
I also agree with the compression ratio as I have several customers running 13:1-14:1 on E85 in street cars.
I run 12:1 with customers on 93 pump gas in 80% of the forged N/A builds I help spec for people that come to me for that service. I wouldn't even run E85 N/A unless my CR was 12.5:1 or higher.
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Your not gonna have much room to bore out that aluminum block. Maybe .005-.010 which will only get you an extra 1-2 cubic inches but that's about it. Someone correct me if I'm wrong...
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Verdad Gallardo I'm just curious because i've seen many 383ci+ builds using trickflow/AFR 225/235cc cylinder heads, and if i'm not mistaken the l92's are 260cc runner. Just my way of thinking if a 225/235cc runner is big enough to support 383ci then wouldnt a 260cc runner just be overkill for a 364?
Would u say that a stock l92 heads would make the same or more power on 4.000" bore then a set of CNC ported 243's? Also i suggested 243's because of the 64cc chamber and would help bump up the compression ratio. milling a set of L92's enough to get a 13:1SCR+ would cut down flow numbers wouldnt it?
I'm just curious because i've seen many 383ci+ builds using trickflow/AFR 225/235cc cylinder heads, and if i'm not mistaken the l92's are 260cc runner. Just my way of thinking if a 225/235cc runner is big enough to support 383ci then wouldnt a 260cc runner just be overkill for a 364?
I'm just curious because i've seen many 383ci+ builds using trickflow/AFR 225/235cc cylinder heads, and if i'm not mistaken the l92's are 260cc runner. Just my way of thinking if a 225/235cc runner is big enough to support 383ci then wouldnt a 260cc runner just be overkill for a 364?
We actually just used those PRC as cast 225cc heads with our V.2 Polluter camshaft to make 506rwhp/443rwtq on a stock bottom end 6.0 GTO.
Joined: Jul 2007
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From: ELSA, South TEXAS (956) 802-7700
If I could personally choose a cylinder head for a 4.0" bore motor it would be a 220-230cc runner every time with no larger than a 2.055" intake valve or a 2.06" intake valve like PRC uses on their As Cast 225cc heads.
We actually just used those PRC as cast 225cc heads with our V.2 Polluter camshaft to make 506rwhp/443rwtq on a stock bottom end 6.0 GTO.
We actually just used those PRC as cast 225cc heads with our V.2 Polluter camshaft to make 506rwhp/443rwtq on a stock bottom end 6.0 GTO.
Thread Starter
On The Tree
Joined: May 2009
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From: Grove City, Oh
