3500 (LX9) swap into a Fiero

[02dohc]

hey i'm in the process of doing a 3500 swap into my 4 speed 85 gt. i'm also installing a getrag 5 speed tranny. im mocking up a true dual exhaust system for it and still having the trunk. im running 2.5" exhaust. and a cross flow dynomax muffler with dual inlets and dual outlets. i did flip the exhaust manifolds to the opposite sides of the egine so the one that comes straight down is visual when looking at the engine in the car. thats just the way im doing my exhaust for thought if you needed some.

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[natebee]

Quite the write up. I'm trying to do some research for a fellow employee who wants to swap a 3400 into a 1985 Fiero 2.8L. Only thing that concerns me is the motor mount holes, did GM change the mounting hole locations from 85 to 1999?

[flimbob]

Quite the write up. I'm trying to do some research for a fellow employee who wants to swap a 3400 into a 1985 Fiero 2.8L. Only thing that concerns me is the motor mount holes, did GM change the mounting hole locations from 85 to 1999?

No change in mounting holes. The 85 mount needs just a little taken off to fit correctly.

[natebee]

No change in mounting holes. The 85 mount needs just a little taken off to fit correctly.

Wow, thats amazing they kept the same mount location after all these years!! Yay for us! Should be a fun swap then. Thanks bob. Can't wait to see your finished project

[flimbob]

I'm hoping 2012 will be the year I finally get my swap going. My swap is my dd and I can't afford alot of downtime caused by unknowns. Unfortunately there will be unknowns caused by various things. Had to do an emergency motor swap using a stock 2.8 because the original motor decided to give out after 200k miles. As it stands, I'm still waiting on:

Exhaust design
plumbing
small amount of harness wiring

[caffeine]

I'm hoping 2012 will be the year I finally get my swap going. My swap is my dd and I can't afford alot of downtime caused by unknowns. Unfortunately there will be unknowns caused by various things. Had to do an emergency motor swap using a stock 2.8 because the original motor decided to give out after 200k miles. As it stands, I'm still waiting on:

Exhaust design
plumbing
small amount of harness wiring

Not sure if this helps, but for exhaust I'm getting a y-pipe made that utilizes a stock-style muffler and tail pipes, to simplify the setup and keep it inexpensive. For the intake side, I used the stock air cleaner canister with a 45* 3" coupler, 6" long section of 3" exhaust pipe, and a straight 3" coupler to to throttle body (lx5 65mm throttle body). The 45* coupler cost me about $20 and the exhaust pipe cost me $6. And the 3" straight coupler I already had. I was nervous at first about the wiring but it's pretty straight forward I just took my time and double-checked my work.

Actually the only thing that held up firing up my swap was clogged fuel injectors. It always pays to have injectors tested in my experience.