Originally Posted by 2000SilverBullet
You would probably be safe to around 20 psi. Go ahead and try, then let us know.
How'* he going to get 20 psi? the smallest pulley available is a 1.9" and that'd only get him about 15-16 psi, and that'* enough to pretty much put him even with a non-sc'ed bonneville performance wise.
16 psi is alot of boost from an M62, especially from a GEN I and he'd probably see around 15* KR, thus his computer would be pulling all the advance timing it can give, which would translate into the engine practically stalling.
That is unless he has the supporting mods. With a CAI, colder plugs, full exhaust, cam, ported heads, ported Exhaust mani'*, water injection, race fuel, and a pcm programmed for such mods he might be safe, but from what we've seen here on BC it'd take more than anyone has pulled from their wallet for a SI 3800, save maybe DR. J.