Originally Posted by
fastback
So who knows what the differences between the 90-91 and the 92-93 B18a1 are? I noticed that peak torque is the same (but comes at a lower RPM), but peak HP is different - 130 vs 140?
*edit - the only info I could find indicated different cams with higher lift and longer duration on the 92-93 cams. If you were going to swap cams though, aftermarket is definitely going to give you more of everything. Other than the fact that stock cams might be cheaper, I don't see why anyone wouldn't just go aftermarket.
Any cam worth buying for the B18A1 is going to required upgraded springs and retainers.. so that's at least $800 right there. Add another $100 for cam gears and $100 for dyno time to dial them in.
By that time, you're looking at $1000 for 12-16 hp. And that figure assumes you've already ponied up the dinero for an exhaust header, intake and cat-back.
And if you're in a state that follows CA smog laws, the whole point is moot... because there are no CARB-certified cams for the B18A1.
If you found a set of 93 ls cams for free and they were in good shape, you could certainly try... but IMO, the B18A1 is not a stellar candidate for a naturally-aspirated build.