6psi if probably the limit you'd want to use on a stock short even with a safe tune a full point fat. The oem lt1 pistons are known to cracking ring lands under boost.

Here are some numbers FWIW. ;)

My Impala has 177k miles on it and dyno'd (at the wheels) 286 rwhp 335 rwtq. :yes: It only has tri-y headers, cold air intake, underdrive pullies, and a tune for 92 octane. The valvetrain is all stock. That is it.

Some friends have a similar setup with the GM Hot Cam and getting in the 320's. Another friend has a 383 CID with ported stock aluminum castings and a mild cam which is putting down 398 RWHP and is very driveable.

The Impala's came with the iron head LT1 and a little less aggressive cam, so they were rated at 260hp (crank) by the factory.

Like a lot of engines, some headwork and a decent cam will really wake these things up. It is ju$t a matter of how fa$t your ca$h i$. :yes:

Randy

I have a 96 lt1 high miles I drive hard all the time, race it evey mouth a few times at the track.It has a vortec blower and nos all stock other then that (injectors programing exhaust) puts down 480 rwhp and runs 11.90 at 120 full weight.Very imprest with the lt1 motor like i said im not easy on this car.