Hybrid 2.8L stroker with Aluminum Heads & Pistons.

[rvbilly]

Hi all, if an individual was too use a 88 2.8L block, + 3.1 Crank, + 3.1 aluminum head pistons with the 26.4 dish and valve reliefs,+ 3.1 aluminum heads,+ a 40 thou head gasket and have the block 0 Decked it would give a respectable 9.94 to 1 compresion , because using the dished pistons with reliefs the splayed valves of the Aluminum heads shouldn`t hit the pistons in theory Correct ?? People have said in other posts to use the iron head pistons with iron heads , that gives a Sh___ compresion ratio, so my thinking is eliminate this problem by using both the Aluminum pistons and Aluminum heads in my 2.8L block,,, better breathing for the engine ( better head flow ) and a good compresion for a NA sreet buildup, what intake could I get away with using? I would still like to use the 2.8L TBI intakes or the Eldelbrock LIM & UIM with the Holley 390 cfm, could I use the Aluminum heads off the 2.8L Camaro block?? thanks for all help,, Bill..

[geoffinbc]

There is no such thing as a Camaro V6 with aluminum heads. They were all iron heads and all iron heads were identical after 1986 until 1995.

You cannot use an iron head intake with aluminum heads. There is also no know aftermarket intaket for aluminum heads that accepts a Carb or TBI.

Your only option is to use a Gen II intakes with gen II heads.

[fivepointhustla]

I'm not quite sure what you are trying to say but there is a compression calculator in the sidebar, called "CR Calculator".

[rvbilly]

2.8 Stroker

All I`m saying is I should be able to use the pistons and heads from a block with aluminum heads for a 2.8 stroker , rather than my 2.8 iron heads, the iron head setup has a weak compresion ratio when building the 3.2L hybrid, I calculated all this with that CR Calculater, I was just curious as to what intake system I would have to use,,, Bill.., did the Fiero blocks use Aluminum heads?

[Guest]

using a 2.8 block with a 3.1 crank is still going to make it a 3.1. There is no hybrid about it. the 3.1 and 2.8 blocks were the same. Only difference was the cranks used and the pistons, pending on which heads were used

[86euro]

All I`m saying is I should be able to use the pistons and heads from a block with aluminum heads for a 2.8 stroker , rather than my 2.8 iron heads, the iron head setup has a weak compresion ratio when building the 3.2L hybrid, I calculated all this with that CR Calculater, I was just curious as to what intake system I would have to use,,, Bill.., did the Fiero blocks use Aluminum heads?

That just makes a 3.1 FWD motor. No, the fiero didn't have aluminum heads.

[rvbilly]

RWD 3.2

3.2L RWD, my block is in a S10 and going back into it, It`s nearly imposable here to get a 3.4 out of a Camaro, so 3.1 crank with 40 over pistons is the largest displacement I can achieve for a direct bolt in, don`t like the 4.3 s ,might as well put a v8 in that case,, Bill...

[fivepointhustla]

The aluminum and iron intakes are not interchangeable. Use the iron intake with iron heads and the same for the other. I plan to run the aluminum heads on my 3.2 this summer. The 11.3cr, nitrous and my cam will make an awesome combination.

[rvbilly]

Fivepoint

Hi fivepoint,, what gas are you planning on using with the 11.3 to 1? Do ya think you`ll have detonation problems using the iron heads with that much compresion? thanks Bill..

[fivepointhustla]

I meant to say I will be using the aluminum heads. I have most of the parts just don't have the cash or a clue on the routing for custom headers. I plan to run 92/93 because that is all we have as far as premium goes. A station down the street sells sunoco 110, but I don't plan on visiting them with the price at 5.50/gallon.

[ForcedFirebird]

Remember that the iron head 2.8 and iron head 3.1 pistons are different also. Somebody correct me if I'm wrong, but they both use the same rods so the wristpin is located higher on the piston for 3.1's. The dish on the pistons are different on the iron vs. aluminum headed engines. I'm planning to start a motor soon boring a 3.1 .030 over and using the RWD pistons (forged) with Aluminum heads to yeald a high compression ratio (trying to get around 11:1). Obtaining this by enlarging the combustion chambers and possibly enlarging the dish in the pistons (I need about 3cc's of material to be removed).