CuekooZ28

Im just looking to do a head and cam swap on my car, but i would like to keep my cost as low as possible for now. Im leaning toward a TSP 224r cam and the 317 heads. I found a pair of 317's in town for 150$.

My question is, will the 317's lower my compression and cause a loss in power? should i pay more for 243's? keep budget in mind.... I definitly want to upgrade from the stock heads. Give me you input, it is very much appreciated. Im in california also, i want to be smog legal as well.

KCS

iTrader: (20)

I think you mean 317 castings. With the larger chambers, the 317's probably won't offer much gain. They have better port shape than the 241's, but with the loss of compression, it'll be a wash. The $150 would probably be better spent elsewhere.

2000PewterT/A

I would go with 243's. Search and you will find a good deal, I found mine on ebay for $325 Brand New! The deals are out there its just hard to find them sometimes, just be patient.

Sales4@Texas-Speed

iTrader: (4)

Yeah I agree with the above statements. 317s lower compression which would negate any pick up from flow. With just a little more cash some 243 could be had, I would stick with the 241s before putting the 317s on there for an N/A build.

CuekooZ28

Thanks for the input. i'll wait for some 243's to pop up.

usnfenix

iTrader: (11)

317's are ideal for forced induction, not for N/A heads and cam cars

CuekooZ28

That is true, i will have to just stick to 243's and a cam for my build. baby steps for this build

03_Denali

iTrader: (1)

or mill the 317s .030. That should bring your compression back, then you would have 243 heads.

wildcamaro

iTrader: (15)

Stick with the ls1 heads!

CuekooZ28

why? what would be the benefit?

CuekooZ28

how much would a machine shop charge to mill the heads .030?

ScottyBG

I had my 317's milled 0.060", and ran a 227/235 113+2 cam with them. PTV was checked with stock MLS gaskets and tight but ok with good springs, about 0.065" on the intake about 0.080" on the exhaust. It picked up almost a full point of compression over the stock 806's that came on my car. For $150 bucks plus the cost of milling probably isn't a bad combo if you want to stay low buck. Not a smog legal cam there though, you would need somthing a little smaller.

garygnu

you can get the heads milled for less then $100.then pick the correct thickness head gasket to get your compression where you want it.

CuekooZ28

I scanned the threads and it seems like the 224r w/ 114lsa is the largest smog legal cam out there. That was about a year ago though, unless there has been a new development. What kind of power did you make with that combo? Having the heads milled sounds like a good choice

wildcamaro

iTrader: (15)

Unless milled the 317s aren't an upgrade from ls1 heads...

CuekooZ28

thanks everyone. going for the 243's. i dont want to have to worry about valve clearance all that much. let the money pit begin.

01ssreda4

iTrader: (96)

No you wouldn't. Contrary to what some newbies might say, the 799 and 317 are not exact copies of a 243 (not talking about compression differences either).

And that would even depend on how much. I've run .025 cut 241s that pulled harder then stock 799s. Milling the living crap out of a set of 317s isn't the first class ticket to a great set of heads.

03_Denali

iTrader: (1)

Not a newb, but for around $250 you can have a set of heads that flow as well as the 243/799 and have the same compression ratio. No, they are not exact copies, but close enough that the difference in airflow wouldn't be detected by a butt dyno. I guess it boils down to your budget and cam you choose.....

01ssreda4

iTrader: (96)

Have you run both or any of these heads on your car back to back?

Fbodyjunkie06

iTrader: (10)

I prefer the 799 casting in a budget situation over the 243's.

Mainly because they can be found a LOT cheaper than 243's and aside from the foundry they were cast in they are the same head.

I can guide you in the right direction as far as cam wise and can put you a cam package together for 690+shipping.