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Dyno tuned 434 SBC 11:1 AFR 245 Solid Roller

16K views 73 replies 13 participants last post by  ChopperScott  
#1 · (Edited)
Hello ladies and gentlemen. I'd like to share the latest build for my NETO/N Pro-street bracket car...

•Long block assembly by Big Sal's Racing Engines
•Dyno tuning at Bison Engine and Machine
•427 .030 over (434 cu in) Small Block Chevy
•4.155 bore x 4.000 stroke
•11:1 compression
•Dart SHP block
•Callies Magnum crank
•Scat H-beam rods
•CP Carillo Bullet pistons
•AFR 245 NPP heads 70cc
•Custom grind .680/.672, 256/264, 108, solid roller cam with 4/7 swap
•Morel Ultra Pro lifters
•T&D 1.6 shaft rockers
•Comp Cams billet double roller timing chain
•Edelbrock 2892 Super Victor II intake manifold
•Wilson Manifolds 1" tapered spacer
•Holley Ultra XP 850
•MSD Pro Billet distributor
•Timing @ 35

•Horsepower: 667 @ 6500 rpm
•Torque: 617 @ 4900 rpm

We tried three different carbs with multiple spacers. A custom built 1000 cfm, a Quick Fuel Q-950, and a Holley Ultra HP 850. In the end, the 850 made the most power. The best pull by the 1000 cfm, built by an experienced carb guy, who was present and tuning it for this engine, was 654 hp @ 6400, and 613 lb-ft @ 5000.

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#16 ·
johnsongrass1 said:
Why do you stop at 11:1
To maintain a manageable pump gas street/strip car for cruise nights, car shows, and exhibitions. At 3000 lbs race weight for the track, I have no intention of exceeding the class limit of 10.00 in the 1/4 mile.