in regardes to the 3.4 to 3400 head and intake swap

[Mr. Manka 93]

Hello all,

I recently picked up a 93 Firebird V6 for cheap, and am planing on doing alot of modding over several stages.

First off, I will be switching out the old intake and heads in favor of the newer alu. 3400 heads/intake. I have a few questions though. I am aware that I will also need to replace the pistons, to lower the Compression Ratio, but, I would like to lower the ratio ever further, as I will be turbocharging the car in Phase 2.
Would It be possible to lower the CR with a thicker head gasket, Or would I get a very small drop in the CR?

Secondly, do the pace setter headders that are made for the 3.4 V6 Bolt up to the 3400 heads? Because I plan to mount the turbo outside of the engine compartment.

Lastly, Who makes good gaskets for the 3.4V6/3400, as I really dont want to use that cheap Autizone crap.

Thanks for bearing with me, and I hope I can get the answers I am looking for.

Rich

[camaroman1181]

Re: in regardes to the 3.4 to 3400 head and intake swap

the FWD head gaskets are thicker than the RWD gaskets, so you could lower the cr slightly by using them. but in order to make it work properly on pump gas, you wnt to change the pistons. especially since you mentioned a turbo.

as for the gaskets... whats wrong with Autozone gaskets? They stock Felpro's just like everyone else. The only oither alternative that im aware of is the factory gaskets. if you are lookin to boost, there might be a set of copper gaskets somewhere, but im not sure where youd find them...

[Mr. Manka 93]

Re: in regardes to the 3.4 to 3400 head and intake swap

[QUOTE=camaroman1181]the FWD head gaskets are thicker than the RWD gaskets, so you could lower the cr slightly by using them. but in order to make it work properly on pump gas, you wnt to change the pistons. especially since you mentioned a turbo.
/QUOTE]

I plan on using the FWD pistons, I am just wanting to lower the compression even more. Somewhere around 8.6:1 would be desireable.


Also with the changing to Alu heads, Will I need longer pushrods or will the stock ones do?

[vanbibber]

Re: in regardes to the 3.4 to 3400 head and intake swap

im pretty sure the stockers are fine.

[3.4Lstallion]

Re: in regardes to the 3.4 to 3400 head and intake swap

[QUOTE=Mr. Manka 93]

the FWD head gaskets are thicker than the RWD gaskets, so you could lower the cr slightly by using them. but in order to make it work properly on pump gas, you wnt to change the pistons. especially since you mentioned a turbo.
/QUOTE]

I plan on using the FWD pistons, I am just wanting to lower the compression even more. Somewhere around 8.6:1 would be desireable.


Also with the changing to Alu heads, Will I need longer pushrods or will the stock ones do?

No Mr. Manka 93 the stock pushrods to not work for the 3X00 head swap. I am in the middle of it as of 9/5/06 and I discovered that when I started to tighten down the rockers. The stock pushrods are too short. Also, bolts don't line up for the stock exhaust manifolds. I missed that when I read black34v6's posts. I'm going to attempt to machine the manifolds to fit, because I want to get my car back together without buying $500 headers. Don't make my mistake. Read the whole thread, because the only thing that is the same from the heads on up is the vacuum line hookups (although they are in different locations.) In fact I believe I'll have to modify my powersteering and A/C brackets to fit because those bolt holes are spaced differently as well.

[3.4Lstallion]

Re: in regardes to the 3.4 to 3400 head and intake swap

I ordered my gaskets from www.rockauto.com. They are fel-pro. Autozone sells felpro too.

[vanbibber]

Re: in regardes to the 3.4 to 3400 head and intake swap

the stock 3.4 pushrods are to short or the 3400 pushrods? i was talking about the 3400 pushrods.

[Mr. Manka 93]

Re: in regardes to the 3.4 to 3400 head and intake swap

so let me get this straight, I WILL NEED the 3400 pushrods, correct?

Also, do the Pace-Setter headders for the 3.4 bold up to the 3400 heads?

anything else i need to know?

[3.4Lstallion]

Re: in regardes to the 3.4 to 3400 head and intake swap

I ordered 3100 pushrods. I ordered them for a 94 beretta (so they could find the part), because I believe the 3400 uses a roller cam and I didn't want to take the chance on the length being different as a result of that although it may not matter. I'll find out tonight how the pushrods I ordered work.

The headers. The RKSport headers work, because they are slotted so they fit 3.4s and 3.8s (one size fits all kind of deal). Judging from the pics on summit the pacesetter headers are not slotted, but I can't tell without seeing them in person and a hack saw can fix that(like it fixed my manifolds). The RKSport headers have no emissions hookups though and that would cause my car to fail inspection.

[Mr. Manka 93]

Re: in regardes to the 3.4 to 3400 head and intake swap

Are the primaries the same size and spaced the same?

Because I know a machineist and can get new flanges made for free.
I just gotta pay to get em welded up.

[3.4Lstallion]

Re: in regardes to the 3.4 to 3400 head and intake swap

The primaries for the exhaust manifolds are the same. Making new flanges would work.

I got my new pushrods in today and the intake pushrods for the 3100/3400 are shorter yet. The exhaust pushrods are the same length as the 3.4 push rods. I'm lost.

I know I need different sizes than what I have. What pushrods and lifters do I need to complete this project? There is 1/4 inch gap between the end of my pushrods and the rockers.

I'm losing my mind. This is why people give up and buy V8s.

[3.4Lstallion]

Re: in regardes to the 3.4 to 3400 head and intake swap

Well I read the sticky again and I guess the stock 3.4 pushrods work. I'll try again. sigh.

[Mr. Manka 93]

Re: in regardes to the 3.4 to 3400 head and intake swap

lol good.

Im going to the Salvage Yard this weekend, Ill see If I can find a buch of intakes/pistons/heads, for everybody:)

[3.4Lstallion]

Re: in regardes to the 3.4 to 3400 head and intake swap

Nope. half of the 3.4 pushrods work. The exhaust rods are still to short. I suspect it has something to do with the roller rockers on my Gen III heads.