UFGatorGuy20

Love the forums. Tons of info. But, I couldn't find much related to my specific question with the search function.

I've got a 2004 Mystichrome with the following power upgrades:

Whipple (tuned to 13psi)
K&N Air Filter
Bassani X Pipe
Borla Cat Back Exhaust

On a dynojet, my car put out 545.50rwhp / 481.93 ft-lbs torque. I was expecting to see ~ 500rwhp. A few members on here noted that my torque was low and that I should get it checked. Others have said this is typical of some aftermarket superchargers at low psi. I know running @ 13 psi is kind of pointless with a Whipple since you can port an Eaton and get 14 psi +-. But, I just want to stay safe right now. (I've only had the car for 4 days). I've read that 600rwhp is the magical number to avoid, unless you want to chance damaging heads and rods, etc. So, I'm not sure I want to retune to a higher psi yet.

So opinions: torque problem that needs to be investigated, or just typical of a whipple @ 13psi?

xxkazp3rxx

Not sure about what to expect... but on a stock eaton with 14psi, I had 480lb ft tor... That number just doesn't sound right to me... more displaced blower + more efficiency = same torque?

03supercobra

i though the cobra could handle 600 horses easily with out damaging anything?

xxkazp3rxx

They can... they get a bit iffy over 700rwhp, and dangerzone is above 800rwhp, but ive seen Cobras do 900rwhp on the stock block... he did it for a few weeks until his built shortblock came in... and i know a couple with mid 800s on the stock block... but there have also been a lot blown at that number too...

spray175

my car made 525rwhp and 498rwtq on a mustang dyno at 13psi with the whipple. want more torque than get a lower pulley. You can add mild boost without a retune.

mattmoto441

well i just got into the whipple myself and from what i read that you hp is a hair high but your Tq is right on. how much timing you running and on what oct of gas?

UFGatorGuy20

I was on 93 octane. Also, I've got a 3.5 pulley. Someone told me that if I replace it with a 3.0, I would see better torque #'s.

xxkazp3rxx

I would run more boost through that whipple... To me it doesn't make sense to run a more efficient blower at a PSI where, the inferior eaton is efficient... swap that pulley!!!

-Also, I don't know that i'd want the more hp, with the torque lacking.... He has around 20-25more rwhp then most ported eatons, and around 25lb ft torque less... For whoever spent the money on the blower (as I know the OP bought the car with the whipple), that's just not economic to me.... $3,000 for 25rwhp and torque loss???

PWORLDSTANG

Welcome the site!

IMO you TQ is a little low. I'd expect it to be closer to 500 ft/lbs. But your HP numbers are in the correct range it should be. I wouldn't be too worried.

If you want more TQ, a lower pulley will definitely put you over the 500 ft/lb mark. Also, when you want more power, you still have the option to get an upper pulley for your Whipple. That will also give you more TQ.

Matts00GT

Add more boost. Or you can spray it. Nitrous really makes your torque shoot up.