[bstockum]

Quote from JOEM;
"Just for clairification, then, your answer to the question of whether the safe zone for the factory Cruiser engine (no heavy duty pieces added) is no more than 6 psi (around 30 HP added) with an aftermarket turbo is...yes. Thanks." /End quote

... I don't think I ever put a HP number on the 6 PSI boost limit I have been talking about, with stock internals! .

... The HP you get with 6 PSI boost will depend on a lot of factors. With a good exhaust system, #10 or 14 cams, bored TB, cool air intake, bigger injectors, head/port work, over-sized valves, Crane boost retard ignition, Intercooler, water-cooling the turbo, cooler air intake, better filter system, GT intake upgrade, ..... may some others too! (most of these would not be considered major engine mods. They are add-ons, that really make a difference to the turbo's / engine's performance.

... In My Opinion, a properly tuned turbo at 6 Psi boost will make more power than a SC at the same boost, .... especially once you get rolling! The small difference in lag, (between the SC and turbo engine), is almost completly taken away, by the way the driver handles his car. If you are in a race mode and treat the turbo right, (how you use the gas and brake), ... you can leave the line with both tires smoking ! ! ! ! ... so where is the big benefite of the SC. .... (YES, .. if you are both lugging around at 15 MPH and both hit the gas at the same time, ... the SC will take off first. .. But once you get rolling, ... the turbo will roll right on by, .. if everything else is equal. ... IMO

I think that FLASHY and PHATDAD, who have both tweaked their cars to around 14 PSI steady, have found that their cars are pretty equal in performance. (FLASHBACK's is a GT / 5 speed and PHATDAD's is a Hahn turbo / automatic.
There are certian speeds where FLASY has an advantage if he down shifts and can "catch the automatic", in a higher gear and he can pull on the automatic some. This would be expected.

I was quite pleased to see an automatic Hahn car, run right with a GT with, the boost held at 13-14 psi. You would normally expect the 5 speed car to "run away from" the automatic car!!
(I think the Super 16g turbo from Hahn is a more efficient unit and is why the Hahn automatic is making more power than the GT at the same boost level. Phatdad's ex system is OK, .... but there is probably still more to be had there along with some larger injectors.

We have been VERY successful, .. turning up the boost / performance on the turbo systems. I am not so sure that many people have been able to do the same, ... with the SC cars.

Back to the orig. topic of this thread, .... I don't think I can "attach" a HP figure to the 6 PSI boost level, ... for the reasons mentioned above, ... unless you are speaking about a totally stock engine, with the turbo added. ... thren your figure is about right. (stock ex system KILLS the add-on turbo), ... it really needs to be upgraded at the same time!!

Still, ... we are learning almost daily that larger injectors and open exhaust/ CAT wake the system up quite a bit in both responce and overall power. ... We have not dyno'd every possible configuration, .... it just gets too expensive to do that!!

Bob