What do you guys think a 9.7 compression 427 with a 350 HP 396 cam 390 HP 427 cam 214/218/460/480 factory cast iron intake (427) and Q-Jet will make for power, and where it would peak, I know the cam is not well liked. Interested in all opinions.
427
VORTECPRO
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I'm doing a 427 (4.32 bore...440ci) with a 6.385 rod and the same heads, pump gas, hyd roller, GM alum. dual plane. Should be done this spring. Looking for 600hp.Soon..........
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what/whose pistons are those??
Autotec
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Is that cam as sold by GM or a "blueprint" version? I had the engine (427/390) in a '69 Vette NHRA stocker 40+ years ago but had a "blueprint" version of that cam and normal stocker engine blueprinting. Ran 11.50's at 117. 4.56 rear, 9" slicks, TH400, etc. Weight with driver was 3485 min so around 3500 actual. Never had it on a dyno but I was guessing around 450 hp. Later added the 3x2 setup and added weight to stay in B/SA. Eventually got it to a best of 11.28 under the old stocker rules.
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Mark, I would think you'd have a hard time even matching the TQ of your 500HP build, but maybe with your customary fastidious machining and assembly....? 520 FT lbs, 470 HP, aka HP and TQ cross at 5250 and it peaks at 5750 is where that # comes from.
Never liked the w-i-d-e- lsa of those early cams, even at 11:1 comp. But they are forgiving.
PS will be calling soon to see if we can fit an approx 450 ft lb 383 into your build schedule this year, or maybe into early next. Higher end custom build of a Hilux, EFI required. It will have to spin a 14 bolt and Dana 60, so good ft lbs are required.
Never liked the w-i-d-e- lsa of those early cams, even at 11:1 comp. But they are forgiving.
PS will be calling soon to see if we can fit an approx 450 ft lb 383 into your build schedule this year, or maybe into early next. Higher end custom build of a Hilux, EFI required. It will have to spin a 14 bolt and Dana 60, so good ft lbs are required.
I never tested it without the spacer.
I used 7/16 fine nuts up against the rocker ball the the factory nut as a jam nut, makes no metal that way.
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MJ always comes through. Great builder.
The cam is a exact copy of a 350/390 HP 396/427 cam 214/218/460/480 but I did have my cam grinder (Redline) change the LC to 112. It was ground on a original 1960s GM cam core, I used 1970s TRW hyd lifters. Vacuum would be 19 inches @ 780 RPM. I wanted very slow GM engineered lobes for reliability and a very smooth idle. It runs so good!
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