chevy 350 piston advice

[kennyhammond]

making a little hopped up 350 for a 89 chevy ... the guy wants a big cam and flat tops i tore the motor down and found a bent valve and dish pistons .. he has a set of heads with 1.94 valves .. now i am thinking the dish pistons will be better for the rebuild but .. want a little advice ..and i dont know what cam i should use

[manimal]

open chamber or closed chamber heads? Carb or EFI?,what cam? full dual exhaust or single?...lots of variables. Need more info.

[hotrod 80]

Need more info . Are the heads 89' also ?

[kennyhammond]

Don't know much about heads....they came off a Corvette ....the Guy went with aluminum instead....
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[Marv D]

Originally Posted by kennyhammond

Don't know much about heads....they came off a Corvette ....the Guy went with aluminum instead....
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I love that... everyone has 'Corvette" heads. And no one wants to talk about the lame 265HP 350's or the 210HP TBI motors that were mainstream mid-70's to 80's corvettes.

[fastwillie 696969]

get the numbers of the engine and heads

[fastwillie 696969]

i refuse to own any corvette from mid 80s . 84-87 just dont like them ,when i work for chevy it seem all i was doing was recall work half the time ,and warranty work dont pay

[kennyhammond]

man i dont know anything about the heads... worst case is i have a set of vortecs in my garage but i dont want to give them up so he is providing the heads... witch he said are corvette heads... so i baught a 268h comp cam and am going to use the dish pisonts with a weimand 7502 intake

[hotrod 80]

Originally Posted by kennyhammond

man i dont know anything about the heads... worst case is i have a set of vortecs in my garage but i dont want to give them up so he is providing the heads... witch he said are corvette heads... so i baught a 268h comp cam and am going to use the dish pisonts with a weimand 7502 intake

I had good luck with that cam , Vortec heads and a 4 valve relief flat top . Is this carburated or TBI ?

[cableguy0]

"Corvette heads" means nothing. They are nothing special especially if they are alum heads from the 80's. Its not going to perform well because like everything else from the smog era they sucked.

[Rannos]

Any more it doesn't make sence to use factory heads for even a mild sbc build. You can buy Egine Quest Heads for around $500-600 complete for just about any sbc build ya want. They are cast by the same company that use to cast RHS heads. They use the same molds as RHS did before they dropped their Iron heads. For the price you will spend on machine work on a set of vortecs you can get brand new heads. Plus if your combo. is remotly accurate they will out proform the vortecs 2 fold. For a mild 350 build get something like the 170's or 185's with a decent hydraulic cam. On a 355 with 9-10 to 1 you can get a mild mannered 375-400hp.

If your buddy is set on aluminium heads, you can get Patriots complete for just over $800. IMO some of best bang for your buck heads out there. A flat top 355 with a good set of patriot 185's with a Hydraulic roller and you can get 420-430hp and still be rather street friendly.

One thing to not over look if your building even a mild motor is rods. Spend some moeny on rod bolts or even a new set of rods. Scat SIR rods aren't that expensive and are pretty d*mn good rods.

[ll____b0t____ll]

I wouldnt use dished pistons on anything unless it was being forced inducted like a blower , turbo or perhaps larg amounts of NOS.
And if your going to be running a decent aluminuim head take advantage of the heat disapation and abilty to run higher compression on pump gas without pinging and go atleast flat tops or even a speed pro with a slight dome.