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| 2.8 vs 3.4 (Page 2/2) |
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pmbrunelle
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JUL 29, 12:10 AM
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BillS
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JUL 29, 06:39 PM
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You can go part way - I did a turbo engine for my 88 Gt - it was a 2.8 block but used a 3.1 longer stroke crank and I bored it so that I ended up with 3.2.
I run a full 3.4 with a bunch of headwork and a fair bit of cam for around 200 bhp, in a 2000 lb. British sports car. The manifolding is superor on the 3.4 and it is a good idea to do that unless you really want to make it look like a stock Fiero.
This is what the 3.4 engine looks like (the MG on the upper plenum was done by me of course):
 [This message has been edited by BillS (edited 07-29-2023).]
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fredtoast
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JUL 30, 12:42 PM
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It might sound expensive to start rebuilding a 3.4 to make more power, but when you are looking at doner motors that are 20 years old you might want to consider a rebuild anyway.
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olejoedad
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JUL 30, 12:55 PM
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3.4 engines are available as rebuilds from most auto parts suppliers, and come with a warranty.
Very few commercial rebuilders offer the 2.8 anymore, chances are if you order one it will be a 3.4.
You may be asked for a VIN for the warranty, if so find a 93-95 Camarobird in the wrecking yard and use it.
Chances are they would accept a Fiero VIN if they do not offer the 2.8.
Overall cost is very close to the same, DIY or commercial.
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