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#1
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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 |
#2
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Don't forget those Buick Nail Head motors...lots of torque.
-wilma
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02 Berger 380hp #95 Lots of L78 Novas Join National Nostalgic Nova! 70 Orange Cooler 69 Camaro |
#3
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That picture shown is of the replacement 430 cu. in. 360hp Buick engine built for 1967-1969 Buicks before going to 455 Cu. in. Buick engine of the same design. It was a totally different design departure from the earlier Nail Head Buick engines.The Last year for a Nail Head Buick was 1966 at 401 cu. in. However, your statement that Buick engines had torque in spades is quite true.
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#4
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https://youtu.be/YvEwFnPx8rs |
#5
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#6
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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. Last edited by Vortecpro; 05-15-2020 at 12:05 PM. |
The Following 2 Users Say Thank You to Vortecpro For This Useful Post: | ||
Arrowsmith (05-15-2020), JoeC (05-15-2020) |
#7
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the NHRA Pro Stock records are
1970 144.48 mph 1971 146.10 mph 1972 149.50 mph I put 700 hp and 3010 lbs in the calculator and came back with ... Your ET / MPH computed from your vehicle weight of 3010 pounds and HP of 700 is 9.47 seconds and MPH of 142.68 MPH. |
#8
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Take a look at this MPH calculator its close. http://www.wallaceracing.com/et-hp-mph.php I get 707 HP for 145 MPH @ 3010, big power back in 1970! Last edited by Vortecpro; 05-15-2020 at 12:18 PM. |
#9
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Joe and Mark, one main issue is that the MMPS and "Match races" were not at 3000+ lbs? They took the weights out, used bigger engines and ran them! This why the 1970 times were 9.90 or there abouts and the Match racers were around 9.40's.
Don't forget that most of the cars in 72 were small blocks and lighter, not the 3000+ lbs like the 70/71 years. So to use the 144+ MPH is NOT the 427430 inch motors? These were the match race 490/500+ inchers that ran light. Just putting the MPH/Weight ratio into prospective.
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'58 Apache pick up restomodding with twin turbo 522 '78 Z28 4sp being restored '78 Z28 32,000 survivor, Og Yellow paint, AC. '70 W30 convert TRIBUTE '70 CANADIAN Nova SS396 L78 Pro Street '69 CANADIAN Nova SS 396/350 hp '67 CANADIAN Nova SS 427 10 sec. driver '66 CANADIAN Nova SS Race Car '69 FIREBIRD Tubbed Racecar '61 CANADIAN Pontiac Bubble top 409+/4sp (SOLD) '31 ALL STEEL Chevy P.U. GONE (EX-WIFES NOW) |
#10
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DragList shows numbers for "Pro Stock Classic" with a 430 cu in limit and "Pro Stock Mountain" with a 500 cu in limit
I was using the record numbers for PS Classic example for 1971 they show ... PS Classic 1971 Records: 1/4 Mile: 9.485 ET, 146.10 MPH PS Mountain 1971 Records: 1/4 Mile: 9.265 ET, 149.76 MPH |
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