pvt num 11

WARNING! NEWBIE QUESTION!

I'm considering aluminum heads for my L98. I'm going to eventually ditch the TPI setup and go Super Ram and stroke the thing out to 383 cubes. I was wondering if I could use one of the older Corvette heads (14101128 or 10088113) for this and retain streetability, a lower budget and good results. Would these support the airflow the 383 would demand? It must be streetable and I'm aiming for 20 mpg's after it's all said and done. No, I haven't a clue what cam to run, but I'm open to suggestions. Also, what intake manifold would this require?

brutalform

The 10088113 with an intake/163, and exhaust/58 port volume should be fine. I know guys using them. With some port work, and the LPE 74219 roller cam, you will have a great 383 combo. All this along with the fore mentioned S/R intake, is a matched and proven combo. The S/R is also more suited to an automatic equipped car as yours.

Floor guy

If emissions are a concern in your state, the vette heads have no egr passage in the head. Vettes get the egr from the exhaust manifold.

pvt num 11

Oh. Hawaii doesn't have emissions testing of any form here (so no EGR is not a big deal) , but we do have stupid safety regulations. Still, they NEVER crack the hood open, so I'm safe from the motor-*****. One of my co-workes is dead-set on me getting some Edelbrock Performer RPM heads, and they are rather nice, but gosh, they're spendy. I'd like to cut costs without cutting corners, I figurd that the 'vette heads woudl be a good compromise. Plus, a little pocket porting couldn't hurt much.

Guess I'll live without EGR. I'll have to keep that in mind for when I get a new PROM burned to cover the modifications.

Floor guy

I have been running the 113 heads on my car since day 1. I had some porting done by another floor guy. He ports heads for a hobby. I have been happy with the heads. They are capable of decent power. Just be careful not to wrap up a ton of money in them. It is easy to do. I have more in my heads than a set of aftermarket heads. I also have a set of ported edelbrock rpm heads about to go on my 406. I will post numbers(et) at a later date. These heads were done up by a pro . Hopefully they are better than home ported 113 heads. We will see.

brutalform

Indeed, that will be interesting to see! Will the stock castings, ported by a ceramic tile guy outflow the professionally ported Edelbrocks? I think you will be a smiles when the hammer drops on that 406...

WS6Formula350

which casting number is better for teh vette heads and why?if theer are no passages for the egr and you put the heads on a 90 350 tpi what will happen?

Floor guy

The 113 casting is the better casting. If installed on a 90 f-body you will not have egr unless you create a similar exhaust header to the corvette.

WS6Formula350

what years are the 113 castings and at that point would u just block off and remove teh egr from the base?if si would this affect anything else and i have to play w/the computer.thanks

Floor guy

The 113 head was available on 88-91 vettes. They are available thru gm performance parts new as well.The head does not have the egr port so you could simply install your fbody intake and leave the valve in place. Air cannot get to it so it cannot work. My car is mass air and it is fine w/ no programming change. Map sensor cars need to have the chip altered to burn egr out.

WS6Formula350

ok thank you...so bascially having 90 formula 350 w/speed density there are no heads that i can get better gains outta of over stock without burning a chip.looks like it's come down to a port and rebuild job for the stockers????

Floor guy

I cannot speak from experience regarding the programming issue and how important it is after head swap. I have a mass air car and it seems to tolerate quite a bit without throwing my check engine light. You may want to ask what is really involved from guys who do it. The diy prom section is a good place to check..