What engine can you put in a 1987 Pontiac Fiero?

Answer 1

2.5 four came in the 4 cyl cars

2.8 V6 came in V6 cars

V6 Bolt in replacements:

• 2.8 from any front drive GM
• 3.1 from any front drive GM but requires changing all covers pans etc
• 3.4 Crate motors used to be available from GM Requires drilling starter bolt holes.

Engine swaps:

• 3.4 front drive engines, requires changing to 2.8 heads and custom push rod length
• Quad four engine. Substantial wiring, computer, mount and clutch modifications
• Old aluminum Cadillac V8 again requires substantial modification and will need relocation of transmission
• 3.8 V6, most common is super charged. No difficult clearance issues. Need substantial wiring and exhaust rework. Mounts need to be built and either use automatic trans or special order clutch needed (This is mine)
• Northstar Cadillac V8 Really sweet runner. Big job.
• Chevy Small block. This swap produces the fastest Fiero. solid 10 second 1/4s with no drama. This swap requires rework for substantial side to side clearance issues. Special clutches and adapter kits. Fuel injection requires substantial wiring rework.