|Originally posted by Blacktree:|
If you're going to swap in another engine, you might as well go for the 3.4, rather than the 3.1. There are a couple reasons for this. First of all, the 3.4 will generate more torque. Second of all, the 3.4 has improved bottom-end oiling, which improves durability.
Besides, drilling a couple holes isn't hard. Rodney Dickman sells a drill jig that makes it a piece of cake.
Also FYI, GM made three different V6 engines which all displaced 3.4 liters. It's easy to get them confused with each other. The one we're talking about has iron block and heads, and the camshaft in the block. It came in the '93-95 Camaro / Firebird. The other two engines (the 3400 V6 and 3.4 DOHC) can also be swapped into a Fiero, but require more work.
For specifics on actually bringing about a 3.4L "Camarobird" engine swap for a 2.8L Fiero, here is a link to a concisely-written "How-To" article (equivalent to roughly 10 pages of hard copy, not hundreds): http://fiero34swap.eleventenths.org
. Written by PFF member, crazyd
, and titled, "Fiero 3.4 F-Body Engine Conversion
", that article is an updated version of what I relied upon in late 2006 for my own 3.4L engine swap.
That 3.4L engine swap was completed New Year's Eve, 2006 --- exactly 7 years ago --- and I'm pleased to note that its 3.4L engine still
starts and runs far better than I do at -150
Incidentally, I suggest you not throw away your `85 Fiero 2.8L engine just yet. Some of its parts (e.g., the intake manifold and the oil pan, if they're in good shape) can be transferred to the 3.4L engine --- as is pointed out in the article I mentioned above.
Also, if they're in better shape than the 3.4L engine's are, the 2.8L Fiero cylinder heads could be used instead of the 3.4L heads, because they're identical in their design, as is the camshaft of both engines.
In any case, good luck to you with your 3.4L engine swap project, and welcome to Pennock's Fiero Forum!
[This message has been edited by project34 (edited 12-31-2013).]