Join Date: Mar 2005
Location: Mt. Prospect, IL
Hey guys, thanks for all the good info!! Never can learn too much.
Yeah I set it all up with AFRs #s. I know they used a bigger bore, saw that on their website, but I really didnt care for my purpose. I'm basically just making cam profiles off of a bunch of different cams I was thinking of using. I figured instead of going around and asking what cam is good and what is not, i would just plug in the #s and see for myself. Being able to simulate my 347/AFR combo is a real plus.
The dyno program turns out #s a little bit lower compared to some magazine articles I have read. For instance, 5.0 Mustang & Super Ford did a comparison in the August '05 issue on AFR 165 vs. 185. The motor they used is IDENTICAL to what i want to run: 347, AFR 185s, Edelbrock Performer RPM II intake, 80mm TB, etc. The only thing is they used a pretty mild comp cam. I set their engine and cam specs up in Desktop Dyno and the #s were a bit lower (about 40 hp or so) but still proportional with their power and torque curves.
So, I may not have a good way to say exactly what power my motor will be making, but it serves the purpose for entering cam profiles and see what they do to the power band. I started using an E303 cam, and tinkered around from there. It's neat to watch your torque curve shift up or down and how the bell mouth changes. I did find with the identical setup that a 331 vs 347 makes the same HP. However the peak for the 331 is always 500 rpm higher (i.e.: 372HP @5500 rpm w/331, 372HP@5000RPM w/347). The torque #s peak at the same for both motors which is usually in the 3500RPM neightborhood, BUT the 331 is consistantly at least 20 lb-ft less than the 347.
I am set on my choice with the 347 because the peak output numbers are slightly lower in the powerband and the torque curves are slightly better for my street driving that I will be using it for. I'm not the type of guy that is gonna crank my motor out to the redline often.
So far, the best cam profile with the biggest #s and widest, nastiest torque curve is the Anderson N-41 cam. I did have my heart set on a Lunati Voodoo (p/n 61011) thanks to their great market and the cool logo (shame on me for buying the damn t-shirt!!!) but the N-41s torque curve pulls higher and harder and for longer than the voodoos does.
Matt - GM World Class Tech - ASE Master Certified
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs | KB Street Cage | '00 Cobra R brakes & seats