GREAT Deal On 572 COPO
 

The new 572 COPO is just going to be a Index killer.
The crate motor is advertised at 720 Hp. with a smaller cam and a carburetor.
The 376 COPO is rated at 425 HP per NHRA Engine Specifications. Classification guide HP 415
The 427 COPO is rated at 470 HP per NHRA Engine Specifications.
The 572 COPO is rated at 500 HP per NHRA Engine Specifications.

Since I have my shoes of I will be able to do some simple math.

427-376 = 51 cu. in.
470-425 = 45 HP 470-415= 55 HP

45 HP/51 cu. in. = .882 HP per cu. in. . 55 HP/51 cu. in. = 1.078 HP per cu.in.

572-427 = 145 cu. in.
500-470 = 30 HP

30 HP /145 cu. in. = .207 HP per cu. in.

To me that is one heck of a deal, but is that fair to the rest of us?

GM thinks the 572 makes 1.25 HP per cu.in. How could NHRA assign such a low number to such a powerful engine?
I'm glad that the new COPO is here, but so disappointed at the HP rating.

I'm always surprised how much information I learn when I do a little home work, ie the 572 COPO is only 35 lbs heaver than a 302, 376, or 427 COPO's and it is 70 lbs lighter than the 350 blower COPO. And we wonder how the shipping weights get askew.

So if anyone has hopes of being number qualifier at this years US Nationals, get a 572 COPO or cross your fingers and hope the parachute deploys every qualifying run, because at .874 HP per cu.in. it an't going to happen!

From a rulebook "......providing the opportunity for fair competition; and
ever-present concern for safety"

Re: GREAT Deal On 572 COPO
 

Larry no different than the Fords And Mopars that started the stock eliminator evolution
Of BOGUS HP ratings
As I recall a new Denali has a higher HP rating on the valve cover that NHRA HP rated it for racing
Go figure

Re: GREAT Deal On 572 COPO
 

Larry,

You are WAY too smart to be posting something this dumb.....

Re: GREAT Deal On 572 COPO
 

A little bench racing info -
Max. bore 4.64, Max stroke 4.39 = 593.9ci Solid roller .731 lift, 2.25/1.88 valves dome piston, max compression 13.83 rated at 500hp in aa/s 3920lb and ss/a 3190lb.

Re: GREAT Deal On 572 COPO
 

I wondered how long it would take Darren to respond lol. I am not sure that combo is near as fast as Larry is making it sound. As I have seen one run at a mineshaft race and honestly not near as impressive as those calculations make it sound. Not saying it doesn't have some potential but.....

Re: GREAT Deal On 572 COPO
 

And the 90mm throttle body would be over 1100 cfm

Re: GREAT Deal On 572 COPO
 

Mike this is an FS car

Re: GREAT Deal On 572 COPO
 

Is anyone running one yet?

Re: GREAT Deal On 572 COPO
 

Letters have caused HP to be low for years,

Re: GREAT Deal On 572 COPO
 

Steve Foley is driving the first delivered 572 COPO at the Baby Gators and Gators.

I had the pleasure of racing him in class on Thursday. I red lighted and then lifted to his full run.

He ran 9.32 on what I think is a 9.70 index. The correction was 1.01 IRRC correctly.

They worked to get it to run that number. It's going to take a little more to make it a killer combination.

Robin

Re: GREAT Deal On 572 COPO
 

Thanks Robin. I watched a video on Friday of Dennis Collins getting 572 COPO VIN #1, wasn't sure when that was filmed. It showed several others with the same grey with orange "572" paint scheme being made.

https://www.youtube.com/watch?v=2Vg7-CwbMC4

Re: GREAT Deal On 572 COPO
 

I took delivery of the 004 car that Foley is running on February 21.....

Re: GREAT Deal On 572 COPO
 

Will they ever get it to run like a built blown 350 that's almost dominating FSS?

Re: GREAT Deal On 572 COPO
 

Oh, I see now they are restricted to FS classes. I was looking at Classracer info and the “classify the combo” link took me to a page that list it in aa/s.

Re: GREAT Deal On 572 COPO
 

what class does the NA 427 COPO fit in

Re: GREAT Deal On 572 COPO
 

Anyone happen to see DPA aka GUMP run his new 302 out in NMCA Bradenton????
Wow!!!

Re: GREAT Deal On 572 COPO
 

I'm running in FS/C with the 6.2 this weekend. They still had me in FS/E from the last time I ran with them.

Re: GREAT Deal On 572 COPO
 

Is the 6.2 a natural class or no?

Re: GREAT Deal On 572 COPO
 

It's the COPO direct injected 6.2.

Re: GREAT Deal On 572 COPO
 

What is the difference between a COPO 6.2 & natural class 6.2?

Re: GREAT Deal On 572 COPO
 

The 6.2 (376) in the 2010-2015 Camaro is the production LS3 combination.

The COPO 6.2 is LT based (2016+). It uses the production block, crank, and heads. It has a bigger cam, more compression, ported heads, and a Holley Hi Ram intake. The 2016-2020 is direct injected. The 2022 is port injected.

Re: GREAT Deal On 572 COPO
 

What is the difference in fuel pressure?

Re: GREAT Deal On 572 COPO
 

The LS3 is about 65 PSI at the injector.

The DI is 100 PSI to the mechanical pump and around 3,000 PSI at the injector.

Re: GREAT Deal On 572 COPO
 

Wish I could afford one Darren. I do love my 69 Camaro but I’m starting to really like the new GM Racing platform.

Let the deflection continue. :)

Re: GREAT Deal On 572 COPO
 

Is this directed at me?

Re: GREAT Deal On 572 COPO
 

Not at all.
I’m sure Mopar and Ford have new toys coming out also.
It’s not just GM offering more platforms.

Re: GREAT Deal On 572 COPO
 

Thanks. I was low thinking about 2,500.

Re: GREAT Deal On 572 COPO
 

We run the LT4 fuel pump.

Re: GREAT Deal On 572 COPO
 

Barry sell the 69 for $60,000 and then buy the new car for over $100,000 is the way it works out lol

Re: GREAT Deal On 572 COPO
 

Hi Don! We Missed seeing you at Pomona and Phoenix! How are things back East?
I have a couple of guys probing me to buy it.
If I could pull it off I probably would.
Except for being in C a l i f o r n I a and trying to race here - all is good.

Miss you guys!

Re: GREAT Deal On 572 COPO
 

We are doing great; lots of racing here for Big Money we have become the top Broker for race car insurance with Hagerty plus collectors cars and still racing my Super Stocker but I suspect My age is forcing me to slow down in other words hold on to the guard rail going up and downstairs lol

Re: GREAT Deal On 572 COPO
 

You guys are both close. And it depends on what your tuner does. The commanded rail pressure should be run at 180 BAR based on my experience. Several tune ups I have seen a commanded WOT rail pressure set at 200 BAR. The issue is that these High Pressure pumps are piston type and driven by a lobe on the rear of the cam.

As an OEM deal they were never expected to turn 7800+ RPM. they tend to want to float above that RPM. The control valve has a hard time controlling rail pressure. There is a high pressure safety that goes into limp mode somewhere near 220 BAR.

If set at 180 BAR it doesn't hit the High Pressure safety. If set at 200 it can and has.

The more pressure that we applied to the feed pump (tank) the less issue with high pressure pump float. We ran 110 PSI to the back of the Rail pump. It really likes about 140 but most regulators are not built to run that high. Screw Pump in tank worked well.

Robin