2.8-3.1-3.4...
Thread Starter
Junior Member
Joined: Jun 2004
Posts: 18
Likes: 0
From: delaware
Car: 1987 Pontiac Firebird
Engine: 2.8L
Transmission: 700R4
2.8-3.1-3.4...
what is the main difference in these ....
are they essentially the same engine, each 30 over the previous?
what are all the mods to be done, to get any spare hp out of them?
are they essentially the same engine, each 30 over the previous?
what are all the mods to be done, to get any spare hp out of them?
Supreme Member
Joined: Dec 2002
Posts: 2,564
Likes: 1
From: Central FL
Car: 91 Camaro
Engine: 3.1...not hardly stock
Transmission: 700r4....not stock either
Axle/Gears: 3.73
3.1 is a 2.8 with a longer stroke. a 3.4 is a 3.1 bored farther than you can safely bore a 3.1 block. you can do any mods to one of these engines as you can any other engine its just that parts are not as readily available. i think i'm making over 200 hp at the flywheel on my 3.1 but that's with extensive mods.