I do know that the more air flow flowing through the engine the the greater the potential for the engine to make the most HP granted there are muvh more that variables that go into the equation.

My question is idealy where will 300cfm put me Hp wise. I only ask this because the heads that I have going to be worked on are a pair of TFS LT4 stroker heads. 2.02-1.60 valves. My machine guy gauranteed me 300 cfm at least, and he is damn good so i dont think that will be a problem. Im just curious provided everthing else works correctly wh at numbers will I be capable of seeing put down.


thanks guys,
-john

 

http://web.camaross.com/forums/showthread.php?t=294913

 

That thread should be bookmarked.

 

John,

The TFS heads are not going to easily get 300cfm out of them. Based on valve area and cfm 2.02 valves really have to do some serious work to get 300cfm out of them. I've talked to quite a few people about the TFS heads and most of them have seen 280-290cfm out of a good set of ported heads, even TFS themselves has only seen this much. To get more than the aveage bear out of these heads you need a very good head porter and a ton more valve than a 2.02.

BTW It's rare to see a standard port 23deg head move more than 300cfm on a real flow bench. I've seen too many "300cfm" heads show only 280-290cfm on the bench and some of them have such weak numbers in the midrange that they really don't live up to the peak numbers.

That thread on the HP per CFM is very good.

Bret

 

Bret,

what would you suggest for head selection granted I havent given you all of my info yet. Granted this is going to be on somewhat of a budget (6 or 7gs for everything not just the motor) i am willing to spend the money where it will do me the most good. I want to shoot for around 300 cfm whatever set up. Matts heads were TEAs correct? what did his end up flowing and how much did he put into them when it was said and done?

Any chance your gonna be going up to Rochester this weekend for the dinner with Gary and Jason? We can start talking about my plans this winter.


thanks,
-john

 

solution:

get 15/18* heads

 

i like seeing that answer but my only question is how much will the headers cost and where can i get them?? if you can tell me i will have a set of afr 195's for sale and a set of hooker long tubes before the winter is out.

 

well, i never looked into it since i cant afford the heads.. lol. if they dont sell one, then its custom..


and if you're having a custom header made, it might as well be made to hold a turbo, right?

 

If you're really interested in running 15 or 18º heads on the LT1 block then you need to do a search. It's been discussed many times.

You also need to determine some goals and outline those with some kind of budget.

I'm just like many of you guys... I'd like to have a 1000hp small block between the fenders of my 4th gen but I don't want nitrous, turbos, supercharger or big block chevy. So that kind of puts a limit on the hp I can make.
Have to figure out what you're willing to put up with maintenance wise and how much you want to spend, then go from there. HP costs money... how fast do you want to go?

-Mindgame

 

one thing i have learned....

a good combo of time, skill, tools, downright luck and good friends can really offset the cost thing


edit:

i suggest you use all your free time honing your skills at your good friends machine shop... that ougta offset the cost some.

 

I suggest that one of these "good friends" be a world-class head porter who gives away his talent to his friends.

 

excelent suggestion.