well 367 rwhp at 9 psi was to much had to put new lentech transmission.
just put a roush 427 supercharger on the 2008 converible i justbought and we dyno it and only made 300 horse power @ 3300 feetabove sea levelthis is an automatic car tested on mustang dyno.

 

Ok so someone guess my potential HP if I get.....

JLT CAI (Brenspeed, 93 octane)
Kooks headers with the high flow cats
UDPs
One Piece driveshaft

 

CAI
CUSTOM dyno tune by a good shop
UDP's
offroad midpipe
CMDP's

this really should get you there easily. if not, add lth's and mix well

 

I wouldn't be surprised at all to be over 300 with those mods.

 

I was at 300.8 RWHP and 304 torque with C+L CAI with Evolution perfromance tune, kooks headers and catted x-pipe. much higher than that now..

 

What is a Rousch 427 supercharger? Is it the same as their regular roots blower?

I have about 490 RWHP and my trans blew up at only 444 RWHP.
I have an upgraded level 10 transmission now.

 

My 2005 was an auto and was in the 450rwhp range but my problem wasn't the trans it would hang on the rev limiter. We got over 500 out of it but that was at .020 over a stroker kit/ Vortec H at 15psi boost, header lots of partsand the trans held up ok. The rest wasn't the cars fault it was the Pro shops for installing 4 valve pistons in a 3 valve motor. SVT told me just driving hot rodding NOT racing the trans would hold up to under 500rwhp if it wasn't raced. It's not an SVT car but I called about my GT Super car and just ask.



John

 

I might be just a tad over 300.

No problems so far.

 

I dyno'd 290 rwhp in theJune in Houston and that was the 5th pull in 2 hours. That was with CAI, Kooks LT's , x-pipe, and tune. I would suspect 300 with better conditions.

I also have UDP's and have seen zero problems with them. Don't even realize they are there.(except for the pull )

Later

 

Id say somewhere in the 290 range. Fyi UDP's are a waste, dont waste your money on them.