Need HP on a 3.1 FWD..!!!

[Superdave]

I think i'm now gonna build 2 versions. One for the CAV. and the other one for the spare car (beretta Gt ..)

First one will get the new cam (440lift) with the 1.6 roller rocker. Ported heads (if i can finally get in touch with SHAUN...) Ported UIM and LIM. also put 3400 exhaust man. Everything with the GEN2 stuff.. (Also have the ligntweight crank pulley, chip and 180 F thermostat.). Maybe a lightweight flywheel if i found one, as a bored TB.

For the 2nd, i really like the idea from Super Dave (I think..)3400, with 2.8 RWD piston and ported everything GEN2 Stuff. Maybe the 2.8 crank too... But we really need the extra punch in exit of the turn from the 3.1 crank.
For this one, we will continue to look at some extra mod...

thanks

you'd need a 3100 to do the 2.8 piston swap "2800" the 3.1 and 2.8 share the same bore but the 2.8 has a slightly shorter stroke.

[RedBird]

3400 block, 2.8 crank, whichever rods work(help me out here Dave lol) and 3.4L RWD pistons. oh and race gas for that high compression IIRC that will still leave you at around 3.1L for displacement, but it'll liek to rev high

[Superdave]

3400 block, 2.8 crank, whichever rods work(help me out here Dave lol) and 3.4L RWD pistons. oh and race gas for that high compression IIRC that will still leave you at around 3.1L for displacement, but it'll liek to rev high

lol.. you'd probably need custom pistons to get any kind of respectable compression. When spring rolls around we should go junkyarding and collect up a bunch of random stuff..

[RedBird]

i thought that 3.4 RWD pistons gave you crazy compression, like 12.5:1? hell i remember you saying it before......

[Superdave]

i thought that 3.4 RWD pistons gave you crazy compression, like 12.5:1? hell i remember you saying it before......

right, but the 2.8 crank drops the piston in the cyl like 8mm so you need a taller piston to make up for that difference.

[El_Diablo]

define old better..... if he got a 3100 with alot of miles then how would they know the real difference? The 3100's still have a 3100 on the UIM and he could just ask ben to have a 3100 UIM without the SFI on it. If he wants it to look old then get an engine with plenty of miles on it and clean the interior of the engine up a bit to free up any HP losses from the age.... I dont see any problem with this? Srry about rwd i mis intrepreted what he origionally wanted.

it doesn't work like that, they're not looking for an "oily", high mileage engine, they're looking for one that looks period correct and if you know anything at all about gm over the past 10 years its not hard to tell that a newer 3x00 plenum is not period correct for his car