ls6 #243 or 5.3 heads
Thread Starter
Teching In
Joined: Feb 2010
Posts: 11
Likes: 0
From: Waco,Tx.
ls6 #243 or 5.3 heads I have a 99 Z28 m6 with hooker lt's ,ory, flowmaster exhaust and slp airlid so far.I recently bought a ls6 intake and a cam (218 234 .60x .59x 111+2 lsa) to do a upgrade. Want to find some heads so i can do all at one time. What would be better the ls6 heads or the 5.3 heads? And what is the difference between them?
11 Second Club
Joined: Aug 2008
Posts: 252
Likes: 0
I have a 99 Z28 m6 with hooker lt's ,ory, flowmaster exhaust and slp airlid so far.I recently bought a ls6 intake and a cam (218 234 .60x .59x 111+2 lsa) to do a upgrade. Want to find some heads so i can do all at one time. What would be better the ls6 heads or the 5.3 heads? And what is the difference between them?
218/234...that's a BIG split!
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 For SURE stock for stock as the 243's flow about 30cfm more at .600. Even both ported I think they are a better head.
And the compression bump is not as much as you think because once they open up the 5.3 chamber for the bigger bore 346 they are 63cc and some change. I measured my TSP 5.3's after they came off my motor so this is not heresay.....
And the compression bump is not as much as you think because once they open up the 5.3 chamber for the bigger bore 346 they are 63cc and some change. I measured my TSP 5.3's after they came off my motor so this is not heresay.....
I run the ported 5.3 heads on mine and I DARE a car with LS6 heads to step up. Ha I say this because I have had some work done to mine and I love them. The compression bump helped my car out but it worked good with my combo. LS6 heads are good heads though.
i'll step up at the end of the year when my planter box is running lol are you running a cam also?
ok heres my beef: if you FIND 243s with sodium filled valves why would u swap them out? doesnt a lighter valve train = mo' betta'?
but i agree, i wish i would have gotten my 243s ported but i didnt have the cash at the time.. so their flat out stock
but i agree, i wish i would have gotten my 243s ported but i didnt have the cash at the time.. so their flat out stock
