Quote:
Originally Posted by JoeC
I'm not an expert on the 1970 NHRA rules but read that 1970 Pro Stock was run on 7 HP per pound so the 430 Chevy could run in a 3010 lb Camaro.
by 1971 they were going into the mid 9s in NHRA Pro Stock so were making pretty good power on gas with tunnel ram 2x4bbs
the online ET-MPH-HP calculator says " Your HP is 693.88 computed from your vehicle weight of 3010 pounds and ET of 9.50 seconds"
The 430 CamAm engines were making good power also here is a youtube vid
Dyno Testing - 1973 McLaren Can-Am Big Block Chevy
where it pulls 750hp
They don't say if its a 430, 465, or 495 cu in engine
https://www.youtube.com/watch?time_c...ature=emb_logo |
I don't know what MPH a 430 inch Pro Stock ran back in the day, but HP is calculated by MPH over 1320 feet, and 139 MPH for example is 622 HP @ 3010 pounds. I would find it very hard to believe 1970 Pro stocks made over 700 HP on todays dynos, but the tunnel ram does help.
Although, 149.7 is over 770 observed crankshaft HP @ 3010, based on the information on page 4. Typically a A/S 375 HP 396 makes 620s for HP on my dyno, can run 9.80s @ 3450 @ 135 MPH. So a factory ZL1 making 601 seems very reasonable to me, although I'd like to see the 7300 RPM peak myself, seeing the 375 HP stocker peaks just under 7000 RPM but is run to 7800 RPM plus.