2023 COPO Camaro 632

[Mike Gray]

Originally Posted by GUMP

The 572 won't get near that as delivered. The original rating submitted was 430 HP, which is a much more realistic number. My 6.2 LT will out run it at C weight....
That 1,000 HP is what the motor made on the dyno. Since when has any Stocker been rated at the TRUE number ?

if your comparing rated hp/weight performance I can understand it needs a rating to wind up in a class and be somewhat competitive. Most ratings are low compared to true hp, but the specs on the 572 are far above most of the high hp stockers and its potential should be far above them also. Is there a cork somewhere in that engine?

[GUMP]

Originally Posted by Mike Gray

if your comparing rated hp/weight performance I can understand it needs a rating to wind up in a class and be somewhat competitive. Most ratings are low compared to true hp, but the specs on the 572 are far above most of the high hp stockers and its potential should be far above them also. Is there a cork somewhere in that engine?

We received the first 572 COPO in February last year and had it at a track two days later. So, I have quite a bit of experience with this combination.

It is probably the most consistent COPO that I own.

The throttle body is the same one that's on my 302. The cylinder heads are the same castings as the 396/375. I have a pretty good idea of how Chevrolet's test session went. I also have my own data. I ordered the car with the understanding that the HP would be 430. The 500 HP rating that the combination was given is a big disappointment to us.

As delivered, the 572 made just a little over 720 HP on Jeff's engine dyno. My 302 made right around 600 HP on Holley's when I lent it to them to test the Terminator X.

I have no doubt that there is room to pick the combination up. We are experimenting with some stuff right now. I just can't bring myself to throw a big pile of money at this car.

[Larry Hill]

My '15 DP 392 is rated at 430.

[GUMP]

Originally Posted by Larry Hill

My '15 DP 392 is rated at 430.

Yes, and it will outrun my 572 all day long....

[Casey Miles]

Originally Posted by GUMP

Yes, and it will outrun my 572 all day long....

What gear ratios does the 572 come with from factory?

[GUMP]

Originally Posted by Casey Miles

What gear ratios does the 572 come with from factory?

It has a 2.48 first and 4.11 rear. The stock tune hits the rev limiter before the mph clocks.

[Casey Miles]

Daren Poole-Adams, sent a private message.

[JeremyDuncan]

Originally Posted by GUMP

Yes, and it will outrun my 572 all day long....

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

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

[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