this is probably a stupid question.

the two engines im referring to are the fbody iron head/block 3.4l and the newer aluminum head 3400 engine in fwd setups.

does a 3400 just drop right into a fiero?

i have the whole 3400 top end as i was going to build the hybrid for my camaro (thinking back, what was the issue with using the fwd engine in an fbody, i guess the trans.)

what trans would you use with the 3400 in a fiero, would the stock fiero one work or the one that wouldve been stock with the 3400?

so is there any point in having the top end to build a hybrid or should i just sell it all? i really dont think ill be doing it for my camaro id rather just get an lsx at this point. i also dont really want to pull the 3.4 out of my camaro and rebuild it for the fiero as it has 196k on it and low oil pressure. not sure itd be worth it, could just pick up a junkyard 3.4 or 3400 really.

Here's a link to Fierosound's site. I think it's worth it.

http://www.fierosound.com/34engine/3400details.htm

Enjoy!

Nolan

[This message has been edited by Sourmug (edited 07-15-2010).]

thats actually the opposite of what i would want to do.

id be using the 3400 (la1) top end on a 3.4l (l32) block.

the aluminum heads/intake flow way better than the iron stuff. i just dont know if theres any reason to use the l32 block over the la1 block in a fiero.

Sorry about that I mis-read your post.

Nolan

np man, im just confused.

im guessing the point of building a hybrid is to not have to replace your whole engine. '*shrug*

Curious how that would work. Isn't the 3.4 a pushrod engine and the 3400 a overhead cam engine?

I might be mistaken though.

edit: Just checked. It's the LQ1 that's overhead cam.

quote 3.4/3400 GM produced three 3.4 L (204 CID/3,350 cc) variants of the 60° block: The L32, a normal large-bore OHV descendant of the 3.1 L (not to be confused with the 90° Series III L32 supercharged), the LA1, and a performance-oriented DOHC version, the LQ1.

[This message has been edited by Khw (edited 07-16-2010).]

The problem you run into is clearence. The iron head engine has a combustion chamber in the head, but the aluminum heads are designed to combust lower in the chamber. Imo you'll end up with a bad case of piston slap. Also the mounts and bolt pattern line up you need dis and a 7730 comp, but as far as a swap goes its not bad. Ive got a 3100 bolted to an Isuzu trans. Runs great just currently really homing it to a new car. Yay car wrecks.

I personally do NOT think it is worth it. Step up to the complete 3400. Better mileage, driveability, power...the list goes on and on

quote Originally posted by IROCTAFIERO: I personally do NOT think it is worth it. Step up to the complete 3400. Better mileage, driveability, power...the list goes on and on

Yeah, I don't see any valid reason to not just go full swing. Trying to mix and match parts gets expensive and a pain to deal with. And if you can go all-aluminum, there's no real good reason to keep any of the iron around.

quote Originally posted by IROCTAFIERO: I personally do NOT think it is worth it. Step up to the complete 3400. Better mileage, driveability, power...the list goes on and on

All true... Unless you want to maintain the "factory look" engine (what I wanted at the time).
If I were "doing over" knowing what I know now - I'd go 3800 S/C.


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[This message has been edited by fierosound (edited 07-02-2011).]

quote Originally posted by fierosound: Unless you want to maintain the "factory look" engine (what I wanted at the time). If I were "doing over" - I'd go 3800 S/C.

I'm 'doing over' but also looking to maintain the 'factory look' in my swap. In other words, I want it to look like it rolled off the line, with the new stuff in it. Not going to be easy, and probably not the cheapest, but it will be fun to get it running.

quote Originally posted by fierosound: All true... Unless you want to maintain the "factory look" engine (what I wanted at the time). If I were "doing over" knowing what I know now - I'd go 3800 S/C.

you wouldve seen a decent performance increase if you had kept the aluminum heads and top end. though with a supercharger its less aparent.

i think the reason people built the hybrid for fbodies is that the oil pain on the 3x00 doesnt fit the camaro cross member. and since its structural you cant really change it. makes sense.

[This message has been edited by notsonic (edited 07-16-2010).]

not worth the effort to do this. you are doing ALOT of work for very little gain.

as mentioned above - the cumbustion areas are different between the iron & alum heads - which norally requires a piston change. I always think an alternate idea is to grind 15CC's out of each cylinder area to make a little more combustion area to accomodate the iron head pistons, and give it a decent bump in compression ratio.

so, now you got alum heads, good flow & higher compression. I think this is a recipe for 250HP 3.4
tho - I dont know if that would compromise the strength of the heads.

You have a PM re: 3400 swap