ls2 vrs ls3
Thread Starter
Launching!
Joined: Dec 2005
Posts: 295
Likes: 0
From: fortwayne indiana
ls2 vrs ls3 Ok fellas what is the biggest advantage of going with a ls3 vrs the ls2? this engine will have stage 1 prc ls6 head on it. I have yet to spec a cam I kinda wanted to wait till i got the short block at my house. but the idea is to run boost so far this is where im at.
Last edited by mightybird; Jan 30, 2012 at 12:40 PM. Reason: spelling
ls3 hands down. more displacement, larger bore, badass flowing heads and intake, most recent technology. what more could you want?
BTW no ls6 heads for ls3!!! the stock heads outflow the ported ls6 ones you have.
BTW no ls6 heads for ls3!!! the stock heads outflow the ported ls6 ones you have.
Yeah...stock LS3 heads are pretty dam great compared to older GM castings.
The difference from say the LS6 to the LS2 wasn't as big a deal...they went up 0.3 liters but they used the same heads on the new engine that they used on the old one...when they went to the LS3, they opened up the bore even further, which really helps flow a lot, then they completely changed the port design...which really helps move a good bit more air. LS3 ports almost look like they're stolen from a big block.
The difference from say the LS6 to the LS2 wasn't as big a deal...they went up 0.3 liters but they used the same heads on the new engine that they used on the old one...when they went to the LS3, they opened up the bore even further, which really helps flow a lot, then they completely changed the port design...which really helps move a good bit more air. LS3 ports almost look like they're stolen from a big block.
On The Tree
Joined: Mar 2009
Posts: 175
Likes: 1
From: shrewsbury, ma
i did the opposite of what most are telling you and was happy with the results. i used my prc 5.3 heads that i allready had on top of a used stock bottom end l92. i think the 126 traps for a 3700 pound car were decent for the money spent.
Thread Starter
Launching!
Joined: Dec 2005
Posts: 295
Likes: 0
From: fortwayne indiana
well i do agree the ls3 heads are much better but this is what i have for now. I will buy a forged bottom end ls3 short block and use my heads and intake till i save up more money for the better heads and intake.
Trending Topics
Thread Starter
Launching!
Joined: Dec 2005
Posts: 295
Likes: 0
From: fortwayne indiana
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 Without milling the ls3 heads down, you will lose some compression. Your heads have a much smaller chamber than the l92
Thread Starter
Launching!
Joined: Dec 2005
Posts: 295
Likes: 0
From: fortwayne indiana
im going with a forged bottom end ls3 and will run my prc heads till i save up for some prc ported ls3 heads i plan to run the kypt turbo kit on the car as well.
On The Tree
Joined: Mar 2009
Posts: 175
Likes: 1
From: shrewsbury, ma
You are correct. I think we are looking at 11.46:1 with these 62cc 5.3 heads. I did exactly what the op is doing. Use what we had at the time and save for better heads down the road. It still should be a solid setup.
I misunderstood your original post. I thought you meant an LS2 with 5.3 heads versus an LS3 with LS3 heads...given the same heads on both, go for the LS3 if price is reasonable just to have the bigger bore, but it's not really going to be a major difference.
