Can anyone tell me what the dyno numbers shoud be 2003 2500 HD whipple supercharged 8psi pulley everything else stock except 6inch procomp lift 36-12.5-r20 and 4.10 gears. I ran it on a Mustang eddy current and it only made 267rwhp. Can anyone tell me if this is low or not. I was dissapointed. Sounded low to me.

 

well, the mustang dyno is much lower than a dynojet. Id say theres 30-40horse right there. the 36-1250-20s lost you at least another 20. stock wheels on a dynoject and you woulda been 330ish in my eyes

 

I agree

 

forgot to tell ya 1 month later ran it on a dynojet it made 319rwhp 446 rwt in the sam conditons as before 36s and 8psi pulley

 

thats stout with those big tires! Nice

 

thinking about doing away with whipple computer 10 or 11psi pulley 43lb injectors dyno tune with intercooler and 4.88 gears to take care of those tires. Any thing i should know. I want to make 425 to 450 rwhp

 

Sounds like you will have similar mods to me other than I am running a Procharger and 35" tires. I have a couple tuning issues to workout, but when I had the 4.10's and stock injectors it was putting down 330HP and 360lbft at the rear wheels. The 4.88's made a big difference as well as the 43lb injectors. The tranny part of the tune needs some work (it's doing all kind of weird stuff) and I need to get a better fuel pump (ordered today) as I am running low on pressure at wot & high RPM, I'd guess it'll be closer to 400rwhp and 400+ rwtq next time I dyno, hope to get back on a dyno soon. The 4.88's really make a difference (and will be especially nice with your blower) just be ready to spin almost 3000 rpm to do 75mph in OD!!