The 1947 - Present Chevrolet & GMC Truck Message Board Network

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- 67-72 Chevrolet & GMC Pickups Projects and Builds (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=115)

- - 1970 402 BBC build (https://67-72chevytrucks.com/vboard/showthread.php?t=556742)

dakotaf

12-17-2012 09:09 PM

1970 402 BBC build

hey i was wonding if anyone could tell me if i can get 400 hp 450-500 torque going .030 over on a 402? and if i do a stock rebuild can i get 350 hp 400 torque? and what is stock compression ratio? it is going in my 72 c10 lwb.

derrickmanx1

12-17-2012 09:27 PM

Re: 1970 402 BBC build

I'm building one right now hopefully 500hp and 500tq. I have a complete rotating assembly cast crank fresh turned .010 and forged pistons w/rings .030 for a 402 or .060 for a 396. I have a Lunati voodoo cam 218 228 @ .050 brand new was installed but never ran. I pulled it because I went with a hydraulic roller and steel crank and rods. If your interested pm me. 400-430hp would be easy with this set-up if the heads are right.

dakotaf

12-17-2012 09:52 PM

Re: 1970 402 BBC build

awesome. im using the stock oval port heads and im gonna get the full works o n them through the machine shop im using.

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