most powerful production NA engine.
07-17-2005, 02:25 PM
#11
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: most powerful production NA engine.
632 c.i.d. "Monster Merlin" - 780 HP on Pump Gas!
http://www.theengineshop.com/engine4.shtml
Bill Mitchell's brawny 427 c.i.d. small block can deliver over 500 horsepower
http://www.worldcastings.com/new/feature0307.shtml
http://www.theengineshop.com/engine4.shtml
Bill Mitchell's brawny 427 c.i.d. small block can deliver over 500 horsepower
http://www.worldcastings.com/new/feature0307.shtml
07-17-2005, 02:50 PM
#13
1.5 BAR
Thread Starter
Join Date: Dec 2002
Posts: 1,230
Re: most powerful production NA engine.
Originally Posted by AbaZ
I didnt know GM had anything from the factory that was over 500hp (stock rated)
??
??
07-17-2005, 03:41 PM
#14
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Join Date: Dec 2002
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Re: most powerful production NA engine.
Originally Posted by AbaZ
I didnt know GM had anything from the factory that was over 500hp (stock rated)
??
??
they made around and over 600 horse but were rated back in late 60s early 70s far lower for insurance reasons.
the only thing GM made production that is rated at 500 horse or close is the c6 z06 and it hasnt came out yet.
the all alum 427 and some of the 454s made close to 600 horse stock.
07-17-2005, 03:46 PM
#15
3.0 BAR
Join Date: Jul 2003
Posts: 6,449
Re: most powerful production NA engine.
Originally Posted by random-strike
Originally Posted by AbaZ
I didnt know GM had anything from the factory that was over 500hp (stock rated)
??
??
they made around and over 600 horse but were rated back in late 60s early 70s far lower for insurance reasons.
the only thing GM made production that is 500 horse or close is the c6 z06 and it hasnt came out yet.
the all alum 427 and some of the 454s made close to 600 horse stock.
This didnt claim to have the highest output NA motor...just the highest output V8 naturally aspirated
I'll take two please
07-17-2005, 03:47 PM
#16
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: most powerful production NA engine.
L88 427
600 @ 5800
550 @ 4000
12.5:1
4bbl Holley
Alloy Aluminum
Mechanical
Dual 2.0"
6qts w/filter
ACR43XL
L71 427
435 @ 5800
460 @ 4000
11:1
3x2bbl Holley
Alloy Aluminum
Mechanical
Dual 2.0"
6qts w/filter
ACR43N
L36/L68 427
400 @ 5400
460 @ 4000
10.25:1
2bbl Holley
Alloy Aluminum
Hydraulic
Dual, 2.0"
6qts w/filter
ACR43N
600 @ 5800
550 @ 4000
12.5:1
4bbl Holley
Alloy Aluminum
Mechanical
Dual 2.0"
6qts w/filter
ACR43XL
L71 427
435 @ 5800
460 @ 4000
11:1
3x2bbl Holley
Alloy Aluminum
Mechanical
Dual 2.0"
6qts w/filter
ACR43N
L36/L68 427
400 @ 5400
460 @ 4000
10.25:1
2bbl Holley
Alloy Aluminum
Hydraulic
Dual, 2.0"
6qts w/filter
ACR43N
07-17-2005, 03:48 PM
#17
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: most powerful production NA engine.
Originally Posted by xenocron
Originally Posted by random-strike
Originally Posted by AbaZ
I didnt know GM had anything from the factory that was over 500hp (stock rated)
??
??
they made around and over 600 horse but were rated back in late 60s early 70s far lower for insurance reasons.
the only thing GM made production that is 500 horse or close is the c6 z06 and it hasnt came out yet.
the all alum 427 and some of the 454s made close to 600 horse stock.
This didnt claim to have the highest output NA motor...just the highest output V8 naturally aspirated
I'll take two please
07-17-2005, 03:49 PM
#18
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: most powerful production NA engine.
Although few knew it at the time, 1970 marked the pinnacle of the Muscle Car era. Thereafter, rising insurance and fuel economy concerns effectively drove these cars to extinction, but, while the lived, muscle cars ruled the streets. At the top of the Muscle Car hill stood the awesome 1970 Chevelle ss454. When equipped with the LS6 option, the SS454 is likely the fastest production car ever built.
Truly the "ultimate" muscle car, the LS6 Chevelle did everything well. Handling, braking, and comfort were the strong points, but the LS6 454's forte was brute force and acceleration. Fed by a Holley 800 cfm four barrel carb, the LS6 was conservatively rated at 450 horsepower and 500 lb.ft of torque, but in reality it was much more potent. Cold air was fed into the carb by the cowl-induction louver in the hood which opened under heavy acceleration. Quarter mile times of just over 13 seconds at over 110 mph were easily achievable.
Truly the "ultimate" muscle car, the LS6 Chevelle did everything well. Handling, braking, and comfort were the strong points, but the LS6 454's forte was brute force and acceleration. Fed by a Holley 800 cfm four barrel carb, the LS6 was conservatively rated at 450 horsepower and 500 lb.ft of torque, but in reality it was much more potent. Cold air was fed into the carb by the cowl-induction louver in the hood which opened under heavy acceleration. Quarter mile times of just over 13 seconds at over 110 mph were easily achievable.
07-17-2005, 03:56 PM
#19
3.0 BAR
Join Date: Apr 2003
Posts: 2,579
Re: most powerful production NA engine.
1970 LS6
454 ci
450 hp
500 ft/lb
1970 Buick 455
350 hp
510 ft/lb at 2800
Quote from musclecar club .com
Chevrolet 427 ZL1 1969
The ZL1 engine was based on the regular Chevrolet 427 engine. However, instead of the regular iron-block and head L72 found in the regular 427 engine, the ZL1 sported aluminum heads and the first aluminum block ever made by Chevrolet. It shared the L88 aluminum head/iron block's engine rating of 430bhp but made closer to 500bhp -- making it probably the most powerful engine Chevrolet ever offered to the public. And the engine weighed just 500 pounds, the same as Chevy's 327 small block. The ZL-1 was made available only for 1969 under COPO 9560 and Chevrolet needed to install 50 copies to qualify the ZL1 Camaro for racing. Chevrolet eventually built 69 Camaros and 2 Corvettes with the ZL1 engine. ZL1 cars were blessed with a 5 year/50,000 mile warranty and were fully street legal. With factory exhausts and tires, ZL1 Camaros could turn low 13s; with headers and slicks, they could turn 11.6s @ 122mph. This was the fastest car ever produced by Chevrolet. Performance had its price - $4,160 for the ZL1 engine alone pushing the price of the Camaro ZL1 to an unbelieveable $7,200 (about double the price for a SS396 Camaro).
Ratings:
427 V8 430bhp@5200rpm, 450lb-ft@4400rpm
Installation:
1969 Chevrolet Camaros: 69.
1969 Chevrolet Corvettes: 2
Total Production: 71.
</quote>
And the new ls6 will be pretty much the best motor ever
454 ci
450 hp
500 ft/lb
1970 Buick 455
350 hp
510 ft/lb at 2800
Quote from musclecar club .com
Chevrolet 427 ZL1 1969
The ZL1 engine was based on the regular Chevrolet 427 engine. However, instead of the regular iron-block and head L72 found in the regular 427 engine, the ZL1 sported aluminum heads and the first aluminum block ever made by Chevrolet. It shared the L88 aluminum head/iron block's engine rating of 430bhp but made closer to 500bhp -- making it probably the most powerful engine Chevrolet ever offered to the public. And the engine weighed just 500 pounds, the same as Chevy's 327 small block. The ZL-1 was made available only for 1969 under COPO 9560 and Chevrolet needed to install 50 copies to qualify the ZL1 Camaro for racing. Chevrolet eventually built 69 Camaros and 2 Corvettes with the ZL1 engine. ZL1 cars were blessed with a 5 year/50,000 mile warranty and were fully street legal. With factory exhausts and tires, ZL1 Camaros could turn low 13s; with headers and slicks, they could turn 11.6s @ 122mph. This was the fastest car ever produced by Chevrolet. Performance had its price - $4,160 for the ZL1 engine alone pushing the price of the Camaro ZL1 to an unbelieveable $7,200 (about double the price for a SS396 Camaro).
Ratings:
427 V8 430bhp@5200rpm, 450lb-ft@4400rpm
Installation:
1969 Chevrolet Camaros: 69.
1969 Chevrolet Corvettes: 2
Total Production: 71.
</quote>
And the new ls6 will be pretty much the best motor ever
