421 Stroker with Trick Flow Heads/Intake Dyno - Redux

The results are in! Best pull made 551tq @ 4200 and 528hp @ 5600. We made a few additional pulls to 6000 rpms and it leveled off until 6300. Got to 531hp, but you could hear her laboring to get there.

Learned a lot today. First, the 190 intake volume on these heads has its limitations and is good for 360-410 displacement. Any more cubes and the heads simply run out of air. The tradeoff is I got gobs of torque down low with the longer stroke. Considering this motor is going into a street car, I'm okay with these results. I wanted 530hp and I got 528. Not bad. Not earth shattering either. I'm sure with some porting, it could make bigger numbers, but I'm not chasing it with this motor. A set of worked Indy heads or W heads will absolutely perform better on a larger displacement motor. End of story. These heads are intended for the guy that wants better-than-average flowing heads out of the box on a stroker less than 416ci.

Overall, I really like these heads and the intake. The fit and finish is excellent and what you'd expect from TrickFlow. As long as you have reasonable expectations, I'd highly recommend them.