Originally Posted by Barry.M
I think your combo is well balanced for mid-range power
. The only thing that I think that needs improvement (IMO) is the exhaust and maybe a 2000 rpm stall converter ?. Shorty headers look cool but don't flow much better than stock manifolds. I'd put a proper set of headers on it and "X" pipe hooked up to your dual exhaust. But it's something that you could change later.
Let us know how it goes once you've run it in.
Well, wow, how time flies!
I got the motor in and "running" in mid 2009 but I had lots of issues getting it running right. I went through 3 sets of valve springs (Different valve spring broke on each set) before I replaced the whole Lunati set with a set from Comp but I had to have them "shimmed" to fit right? No issues since.
Anyway, using the factory Qjet with a rebuild on it I dynoed 238hp originally (I forgot the Torque) to the rear wheels. There was maybe 300 miles on the motor at this time. It has issues idling and running at lower RPMs.
Fast forward to 2010 and the military then shipped me to England. Enroute I bought a "new" Quadrajet from Cliff Ruggles at Cliffs High performance. He "Built" the carb using my engine/drivetrain specs. I got it installed and did a "rough" tune on it. In England I found a Pontiac specialist, Robin Grey at "AutoPontiac" in London who among other things Tuned the carb. She purred like a kitten after that. I was even able to take her when I went to Germany for military training. Yeah, 6 weeks and the Autobahn...what a trip!
Fast Forward now to 2013 and the Military brought me back to Utah. The motor now has 30000ish miles on it as the car was my daily driver in Europe and I had it Dynoed a few weeks back. It came back pushing 261hp and 281ft-lb of torque to the wheels.
Now, other than a few more miles and a properly built and tuned carb, I've done nothing and picked up 23hp!
The trasmission is now slipping so I'm getting a rebuild kit from Probuilt Autmatics in California and a Vigilante Torque Converter from Presision industries with a 2600rpm (estimated) stall. I can't wait to try these out.