Thread: 3100to3800 swap

I got a great deal on a 3800 out of a 94 boneville,I want to know what it will take to put it in a 98 grand prix that had a 3100 originally.I know harness and computer but what else?

i dont know if that 3800 is a series2, but i hope it is because otherwise someone sold you the wrong damn motor.

Nope.

'94 Bonne is a Series I.

You got the wrong engine.

Series I is a different beast.

Much larger differences between I and II, than II and III.

I have not bought it just said its a sweet deal,I have been lookin at quite a few engines just not sure what will be an easy swap,that's why I'm asking for info,opinions on what's best.

3400 from a Grand Am would be easiest...I'm sure with a ported top end and a decent set of headers/head work/cam/larger TB/wideband tune...I don't see why you wouldn't net at least 200 WHP out of the thing and be just as fast as a stock supercharged 3800..

Series one is fail. And either way you'll need a trans too.

not to mention swapping mounts because the boni mounts different. the series II from any Wbody will mount fine. and they are not hard to find. save your self the hassle and get one that will fit.

i dont agree with the 3400 option. it will be much simpler, but after all that work and some time or money in mods your keeping up with a stock L67. if you swap to an l67 you are there without any into mods.

^this