Re: Aluminum heads or full roller valvetrain?
Thanks for the input everybody!
The car is consistent. I want to chase more often. I don't *think* it spins. It doesn't feel like it, and I would think I would see it on my time slips.
I believe the converter is around 3300 stall, but I'm not 100% on that. The TH350 has a band delete and a shift kit. I'm not really sure what the trap RPM is but I'm thinking it's up around 5000. Let's do the math!
According to Hoosier, my slicks have an 87.5" circumference, which means that the car travels 87.5" / 4.11 = 21.3" per engine revolution.
103 miles / hour * 1 revolution / 21.3 inches * 12 inches / foot * 5280 foot / mile * 1 hour / 60 minutes = 5100 RPM which sounds about right. I'm pretty sure the shift light (5000 RPM) comes on just before I hit the finish.
For the folks who have suggested shifting higher, I'll give it a shot but I'm skeptical. In the past the car has nosed over after 5000 RPM, particularly in 1st gear. I can shift anywhere from 4000-5000 and it will run basically the same times. If I hold on any longer, it slows down. That's one of the main reasons I'm considering the valvetrain. I don't think I can spin much faster on my hydraulic flat-tappet cam. It does still pull pretty hard in 3rd after the finish line though.
As 427L88 mentioned, I may be limited in the total lift I can go to with the Vortecs. They're advertised as max lift of .475 and I'm already running .480. I'm not sure if they can be machined a bit for some additional clearance. Anybody have any experience with that?
I'm definitely not against leaving the engine alone and working on the suspension, though I'm not really sure where to start in that regard. Shocks? In the back I've got boxed control arms and racing springs, but that's about as far as I've gone in the suspension department.