502-502 Crate Engine

[matchframe]

I have been trying to come up with a good combo for a Big Block that would produce around 500 HP. Everytime I price out the parts and machine work, I keep coming up with just under $7,000. For that price, I can buy a 502-502 Crate complete, but partially assembled, and with a warranty. I really like the idea of producing that much HP on pump gas.

Has anyone bought this engine, and how did you like it?

Bill

 

[1BAD80]

Yes I know of 3 guys that got them. They are very happy with them esp. the warrenty from GM on them. Their coming out with a 672 this fall. Heres their site.
http://www.gmgoodwrench.com/gmgoodwrenchjsp/perfparts/category.jsp?section=ep

 

[bradfordsvettes]

one of our club members got one and put it in a 76 i think and has a 6 speed is an absolute animal steve :eek :crazy

 

[matchframe]

I really appreciate it. The more I think about it and research it, I believe that's the way to go. I plan to start out with a Turbo-400 built by B&M, then eventually I want to get a 6 speed.

A good friend of mine has a Donovan in his '67 coupe told me that if he had to do it over, he would go with the 502-502. That's what got me to thinking about it. He just put a 502-502 in his boat, and it is a screamer!

I understand that the 572 is going to be way radical with 12:1 compression. All of that and a warranty too....!

 

[67HEAVEN]

Yes I know of 3 guys that got them. They are very happy with them esp. the warrenty from GM on them. Their coming out with a 672 this fall. Heres their site.
http://www.gmgoodwrench.com/gmgoodwrenchjsp/perfparts/category.jsp?section=ep

It's a 572c.i. not 672.

ZZ-572 in both 620hp and 720hp versions. Bring a wheelbarrow full of money.

 

[richscorvettes]

Bill,

We have the 502/502 in our 67. It's hard to beat the performance for the price and the warranty. The installation is pretty straight-forward especially if you already have a big block car.

There are a couple of differences from the Mark IV blocks though to be aware of. There are no provisions for a mechanical fuel pump nor the location for the clutch "Z" bar attachment. You can use an electric pump mounted close to the gas tank and you can get a plate from folks like Scroggins-Dickey for the clutch mechanism.

I saw the 572 in Detroit and the new ZL1. On that one I was given an estimated pricing of $18,500 :eek but have also heard of even higher prices quoted as they plan to make only 200 of them.

Rich Lagasse

 

[Tom73]

It's a 572c.i. not 672.

ZZ-572 in both 620hp and 720hp versions.

The 620hp version is 9:1 compression and pump gas. The 720hp one is 12:1 compression.

tom...

 

[RhinoB1]

I could give you info on a 383 that makes 540 hp 519 ft lbs torque for about $4500, send me a PM with your email if interested.

 

[Glensgages]

A guy at my local drag strip put the ZZ502 in his mid-Seventies C3. It has a THM400, 'on-sale' converter, 3.90:1 rear gears, and 29" x 11" slicks. He ran 12.03 @ 112 MPH (that is ZO6-territory, friends!) before he busted his rear-end! 502 HP, 567 ft/lb of torque, on pump-gas, with warranty. NO street-tire will hook that kind of torque.....Maybe THESE are 'the good old days'.....?

 

[Barrie]

I have the 502 Ram Jet in my 2800 lb '68 roadster. I have not had a chance to run at the strip yet, but I have run against a friends '63 with a 383 that runs consistent 11.8's.

This was on the street, and rolling start. Even with rolling start, I have some traction problems (13" wide Pirelli P7's), but I pull him quite well through part of third gear. That's as fast as we both wanted to go on the street.

I have some slicks on the way and am hoping for mid 11's.

Does that sound reasonable?

Barrie

 

[Glensgages]

I don't se why not. I assume you weigh less than a mid-'70s C3; traction will be your biggest concern. I think the guy who run 12.03/112 shifts at 5300 RPM; the cam has no smoke above that RPM (according to him). I'd think 3.55s/3.70s would do two things; help maintain traction (less torque multiplication), and keeping RPM into reasonable range. Just my $.02 worth.....

 

[1BAD80]

With a 2800 lb '68 roadster you should be in the mid 10's easy if not low 10's.
My car weigh's the same with a 427 small block and runs 10.80's

 

[Glensgages]

I won't go 'QUITE' that far; traction (and the C3's rear-end ability to handle the torque) will be your biggest adversary. You've got weight & torque in your corner; the rest is up to you!!! Good luck; keep us posted.....