2023 COPO Camaro 632

[GUMP]

Originally Posted by JeremyDuncan

As delivered..........

1969 COPO 427 ZL1 Camaro's were 12 second cars as delivered......

The ZL1 was not "dragstrip ready" as delivered. Do those modifications and it ran A LOT better. Add 50+ years of rule changes and it's rated only 15 HP above the factory rating. Do you have dyno numbers that you can share on that combination? It was competitive in 1969 with very few modifications and I believe it's still competitive at it's current rating?

[JeremyDuncan]

Originally Posted by GUMP

The ZL1 was not "dragstrip ready" as delivered. Do those modifications and it ran A LOT better. Add 50+ years of rule changes and it's rated only 15 HP above the factory rating. Do you have dyno numbers that you can share on that combination? It was competitive in 1969 with very few modifications and I believe it's still competitive at it's current rating?

2022 572 COPO 500HP FACTOR
.720/.720 CAM LIFT
13.8 actual compression ratio
GM 401 ALUMINUM HEADS
2.25/1.885 VALVES
340CC/130CC RUNNERS
90mm throttle body that flows 1000cfm( Rumor has it Patterson made over 1000hp with the SS version of it with same 90mm throttle body)

1969 427 430/445 HP
.580/.620 lift
13.8 actual compression ratio
GM 401 ALUMINUM HEADS
2.195/1.885 VALVES
320CC/120CC RUNNERS
850CFM Holley Carb

[Tom P]

Chevy makes a big deal about those engines making 1000hp.... why can't it be rated at that? I'm sure with the allowable overbore and cam duration and blueprinting it should be OK. It's as legit a Stock combination as the injected 427 SOHC flip top 67 Comets are...

[GUMP]

Originally Posted by Tom P

Chevy makes a big deal about those engines making 1000hp.... why can't it be rated at that?

For the same reason that the ZL1 wasn't rated 550 HP in 1969...

[Randy Guest]

Im new to the COPO deal i have raced stock with a c/sa 68 chevelle 396/375. I have a 2022 COPO 427 i got the car at the end of november with no place to test. I live in New Mexico so that does not give you a lot of places to go in the winter time . does any one know how fast the car should run at sea level. the way it came from the build center. I was just wondering what to expect. I know i will have to change up tune ups as i go. Thanks

[Tinker Toy 2]

Originally Posted by Randy Guest

Im new to the COPO deal i have raced stock with a c/sa 68 chevelle 396/375. I have a 2022 COPO 427 i got the car at the end of november with no place to test. I live in New Mexico so that does not give you a lot of places to go in the winter time . does any one know how fast the car should run at sea level. the way it came from the build center. I was just wondering what to expect. I know i will have to change up tune ups as i go. Thanks

Randy, depends on class you intend to run ( weight ). Car at FS/B weight
from the factory, my estimate would be .4-.5 under index. But you will
need to get a good tune on Holley. Welcome to the world of COPO racing.

[Randy Guest]

thank you for the info just wanted an idea of what to expect.
Randy Guest