SO it turns out that I was pulling out the rocker studs and the valve seats are bad on the head I was using on the car. Go figure! Any ways I am in the market for a new set of affordable heads and was hoping i could get some recommendations from you guys. plan on running around 10psi of boost as this is mostly a street car. If my math is correct I will be looking for 70-76cc heads.Also the selected cam is :
http://www.compcams.com/Company/CC/c...?csid=129&sb=0

I was told that something like this would work decently.
http://www.summitracing.com/parts/dr...make/chevrolet

and once that is figured out maybe a good stall to run?

 

Looks good to me. What cubes tho? Could go bigger on cam, that is a very mild cam

 

Sorry, Cam is a bit small i feel but its a 355 very mild build. Only really wanting to hit the 400s hp wise. Think thatll make it happen? Oh and btw Orr i blame you and your build for making me go for twins.. lol

 

Lol turbos are fun when everything works as it should.

Cam will work fine then. Should be like a stock L98 with 275-300 hp with those heads depending which intake and with few psi should make nice power.

 

Thats all im really aiming for considering im only 22 and have only had a 305 car. So itll be a big upgrade for me. The price on those head pretty decent then? Is there a similar pair for a little bit less? As far as heads go theyre all a bit pricey. At least to me haha

 

Yeah all aftermarket aluminums are pricey. Jegs brand heads and dart shp are among the cheapest that still have some good quality

If you need budget aluminum thats about as good as it gets

 

Those heads were actually cheaper than some of the iron heads. Unless i wanted to get the small intake runners these look about as good as it gets. Thanks Orr

 

You dont necessarily neeed them for your goal but they will allow for future growth. If your compression was good a set of iron vortecs could make good power and be cheap. May need to run more boost but thats easy to adjust with turbos

 

About 70 cc is about as low as i can go. I think iv seen a few at 67? But thats as high as it goes really if im correct. As far as those heads go the price vs intake runner is about as good and cheap as you go. 180 runners were actually a bit more. I did see a few sets that were in the 300s but they were 165 runners and i figured that would be a bit restrictive but the 200s like you said will allow for future growth. Only problem with that is im still running the stock bottom end minus new pistons and rings. If that ever goes i may just run and join the ls World

 

True. Cant go wrong with ls for budget turbo builds making big numbers. Stock sbc crank and good pistons with good tune should live. Rod bolt upgrade would really help, else keep rpms low

 

Thats the plan, try to keep it mostly stock since we had most of the stuff laying around we went for it. Figured we can play and learn with this and can always upgrade later. I dont plan on reving the **** outta it so it should make decent numbers and still have good street capabilities.

 

So I just found out my Step dad has a pair of heads # is 3932441. Theyre already ported and polished and with bigger valves installed also with screw in studs. only wants 400$ for them. Think this would work better rather than spending the 1000+ for the summit heads. I think ultimately ill be doing a ls motor and selling the setup to provide the cash for it. Id rather not dump 1000s into a set of heads with my mild build with moderate power goals. I think these would get me to the 400s still? Oh and they were milled .045 as well.

 

What would the compression be? What are the flow numbers if ported?

 

I was told to figure 1cc per .07 milled. so my comp is still under 9:1. as far as flow numbers all iv have seen really are " they flow about 152 cfm through the intake valve and 93.2 cfm through the exhaust valve stock 1.94 intakes, 1.5 exhaust." Theyre probably not the greatest but id guess they still would flow decently enough. He said he swapped heads when he rebuilt his 355 in his nova. Said that when he had the motor on the dyno they made 425 hp ended up swapping these for a new pair but are ready to go just need new rockers.

 

With new valves and porting work its hard to say what they will do without having the data handy. They likely will work tho, just may need to run more boost to get the power out of them and i would increase cam abit

 

I would not use a 200cc intake runner on a 355. I am building a 383 and will be running the AFR195's. I could go to 210's for the exact same price, but I would seriously compromise streetability. Velocity is everything at low end not just air flow. Without velocity the fuel will fall not vaporize for lack of a better term into the combustion chamber. I would go with the smallest intake runner that produces the flow numbers you are looking for. 180 to me seems more appropriate.

 

There will be plenty of air speed with 200cc and then a turbo on top. Plenty of torque available. Trust me

 

I don't disagree. I was just thinking bottom end.

 

I'll just grab up these heads for now and when the time comes a more aggressive cam and bigger heads. I can always sell these off later on. Once im sure im not going to break anything I might increase the boost, she should handle it

 

Well motor is almost ready. Just gotta clean up the heads a bit more, btw it has three springs on them atm should I take one out? or will it be ok just overkill?

 

ill get hung for this but id have stuck a set of pc 195 or 210s on it and called it a day
http://www.ebay.com/itm/SBC-CHEVY-210CC-FULLY-BUILT-ALUMINUM-HEADS-64CC-CNCd-/370398568479?pt=Motors_Car_Truck_Parts_Accessories&hash=item563d79a01f&vxp=mtr

 

Just take them out and replace with a proper flat tappet spring. Comp 983 recommended springs should work.

Triple springs are race solid roller type springs that have high pressure and will flatten a hyd cam lobe and lifter in no time

 

Sounds good, ill just run my old springs then since thats what they were. Thanks Orr