ccstarnes7

I feel like this is a dumb question but im wanting ls6 heads for my car. Do i just need ls6 heads or do i just need a set of 243 heads?

LASTOFTHEBREED02T/A

iTrader: (15)

Same thing... If you go 243 try to find the ones with sodium filled valves. Are you going to PnP them? If you are, I'd just look for a good used set here on the site.

ccstarnes7

Yeah that's the over all plan. I just know there popular on the f-body. They seem to be reliable for a street/ drag setup

garygnu

799 heads have the same port as 243s .

My6speedZ

iTrader: (18)

Correct, I believe the only difference is 799's are cast in Canda right?

LASTOFTHEBREED02T/A

iTrader: (15)

It is very popular, and its been proven to be a great choice. Another head that seems to be right with it is the 5.3 (862) which is what i recently purchased, but they are TSP CNC'd, dual springs .650, larger valves. Some like these more because of the Compression, 11:1 and are decent for spraying.

So many choices tho, just take your time and pick whatever is best for your set up/future plans.

2000PewterT/A

I waited and found my 243 heads for $325 bucks brand new on ebay, just keep a eye out for the good deals and you can find some.

R6cowboy

iTrader: (3)

You know you could save yourself some cash by getting the same cnc work done to your stock LS1 heads that you would to the 243 heads and get nearly the same performance.

LASTOFTHEBREED02T/A

iTrader: (15)

Any head with a port job will have a noticible gain. A set of ported 241's will outperform a stock set of 243's all day. But once you get some work done to the 243's there is no comparison. The 241 is a little thinner than the 243, therefore not being able to get the full desired angles.

Im my opinion OP, you should avoid headaches, and just get some used cnc'd 862's or 243's. 241's can only take you so far.
Some claim the 317 is also a good choice once the valves are milled, but im not very familiar with them. (Piston slap maybe a problem).

Keep us posted!!!

R6cowboy

iTrader: (3)

Not what I heard one of the very well known cnc companies last time I was cylinder head shopping. With the exact same porting and cnc work, both heads perform very similar. And the same porting can be done to both. True 243s still flow a little more then 241s, but not by a big margin. 243s are just so much more glorified on the forums.

LASTOFTHEBREED02T/A

iTrader: (15)

Really? Always known the 243 had more meat in it for a better port job, where the 241 lacks. Thought you could only port the 241 so far before getting into the water.

I stand corrected!

weldermike27408

317's have more material from what one cylinder head guy told me.. 243's are a great head i think

garygnu

317 heads have large chambers, but the same ports.do you want 243s with the sodium filled valves ?look at some Texas Speed heads if your budget allows.

Karl101

this is a newb question for me since i know nothing about heads and cams. seeing how 243's are really popular, what kind of cam will work really well with it? ported and unported? what's the difference between the stage 1, 2.5, and the stage 3 ls6 heads?

ccstarnes7

For me money is an issue but if I don't mind putting back a little longer if something else would be superior... How much would it run on average to get stock heads done?

R6cowboy

iTrader: (3)

Back when I was shopping for heads I was working with a budget (like most of us) and already had the stock set of 853 heads (same as 241 heads) off my car. A rep at TEA had told me I would get more/better performance using my cylinder head budget getting the 853/241 heads cnc'd rather then using approximately $400 of my budget buying a used set of 243's and getting those cnc'd, working with the same amount of money.

So if you're on a budget and only have lets say approx. $1300 to spend on heads and you already have a set of 241's. You're going to get more performance putting the money towards the 241's rather than buying a set of 243's and using the remainder of the money to cnc those.

About $1300 at AI (Advanced Induction) or TEA (Total Engine Airflow). You can't go wrong with either company, they're both top notch.

MikeWS6

The stg1 ls6 heads from Tsp would be a good choice.

ccstarnes7

So lets say i took my stock heads off and sent them in to be cnc. That would get me just as much preformace as getting 243 heads and getting those cnc'd?

R6cowboy

iTrader: (3)

Depends how much money you have to spend.