Just found this old post from Larry. Feeling a bit better about these and my two sets of 781's.
Lets put Larry's statement into perspective. .070 over 454s with flattop pistons, peanut port 236 heads, 2.065/1.720 valves, and QuadraJets make 720 STP corrected HP. The same setup except for 049/781 heads make 740 corrected STP HP.
I will guess this is one of your combos, Mark?
This engine is not mine, but I was aware of the testing data from this SSGTA engine built by Gary Hettler, the car set the record @ 8.77 @ 147 in GTAA. The car was Frank Grossi, heres a video. I believe it was 720 STP HP on a SF dyno. One other thing to note is this: 1320 divided by 147 = 8.97 60 foot was 1.19. https://youtu.be/kVB8Fca9w0k
Racing a NA NHRA stocker should be mandatory before any posting.
Finally getting enough time and money to put this engine together... I just ordered a COS solid flat tappet cam for this from Terry Walters. It will be interesting to see what they select for this. The next go around will be solid roller after I have the lifter bores bored/indexed but it's not in the cards for now.
gmrocket wrote: ↑Wed Aug 07, 2019 9:42 pm
I love this new speedtalk and how it brings up old similar posts...
Did this motor get done Charlie or Bob?
The motor is ready to assemble but the car is still a long ways from being ready... spending too much time on other people's projects. I might put it together this fall and schedule a dyno session just to get project moving in the right direction. I eneded up getting a cam through Terry Walters spec'd with I think Vizard's cos program. It's a solid lifter flat Comp custom grind with the plasma nitriding and edm lifters. Rockers are 1.8 scorpions which I've been told are closer to 1.88. We'll see if the cam lives! Also wondering if tool steel lifters with the edm hole would be a good idea.
Have you had the misfortune of having to port Gen V, BBC I guess "peanut port" heads while having to leave the factory valves in place? If so, how did they work out?
RevTheory wrote: ↑Sat Aug 10, 2019 7:20 pm
Charlie,
Have you had the misfortune of having to port Gen V, BBC I guess "peanut port" heads while having to leave the factory valves in place? If so, how did they work out?
I have done gen 4 peanuts cut for 2.19/ 1.88. They ran hard but had a ton of metal removed.
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