Originally Posted by fast68plymouth
Here’s the questions to ask yourself......

How much of a gain in power would you have to see out of the SFT to roller swap to justify the cost.......and does that seem realistic?

Quote
If it helps, here are the number 1 & 2 times for our combination:

11.52 120.28

11.58 117.98

Both were 511ci. I know for sure the second had a solid roller; pretty sure the first did also but, can't confirm.


The #1 motor made way more power than the #2 motor.
It just shows how important the overall set up is, as motors with very similar power to that one have gone well into 10’s in heavier cars.
There was def a fair amount of ET left in that car.


That’s kind of what I’m trying to determine. I’d prefer to stay solid flat tappet, but if there’s more than a tenth in going roller I’d likely take that step. I expect to get everything out of either package when it’s done just would not want to do it twice.

B


1968 Road Runner 383 727 3.91 8 3/4 3520 with driver 11.04 @ 124.26 with 1.67 60’
Done on G70-14 redlines thru factory manifolds New quickest ever 383 build in FAST.
10:1 451” replaced with 14:1 499”.