big block hp question.
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harryman
- Renting Helmet
- Posts: 5
- Joined: Sun Jun 02, 2013 9:27 pm
big block hp question.
new to drag racing :freakout . first big block ever, building for a weekend track toy. the block is a 69 427 bored to 4.320 with wisco pistons 1.645 compression height /+.36cc / +.455 domes. A forged 4340 crank 4.00stroke,6.135 H-beam rods, heads are chevy closed chamber l-s 6 292 rectangle port that have been port matched,the intake is a victor jr 454r ,1.7 gold roller rockers,the cam is a crane f-256, with 292/300 adv duration 256/264 @ .50 with .618-.638 lift and 108 lobe separation,the carb is a preform 950cfm.forgot the compression should be 13.5-1 with the heads being milled to 105 chambers. any ideas of horse power with this combo?? thanks for any info..
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10wideBu
- Burnout Box
- Posts: 12
- Joined: Tue Dec 10, 2013 6:44 pm
Re: big block hp question.
650 plus, that motor will like rpms probably could use duration and lift. Don't know the rest of combo, chassis and gearing,cyl peak cyl flow at what lift. I would just put it together and run it .