CharlieCobra03

This is the 502 CI 502 HP 567 TQ aluminum head roller crate motor. All forged internals 9.6:1 compression and other goodies. Anybody know anything about these motors?

WAHUSKER

iTrader: (4)

They won't fit in a Mustang?

My brother was looking at one at one time to drop into his 55. I'll ask him if he has any info still. Whatcha doin now Charlie?

CharlieCobra03

Just workin'. It's in a '70 Chevelle with a race prepped AT, 12 bolt spooled rear, Aeromotive fuel cell and system, 3000 stall, etc. It's ugly but has potential. It's not as fast as the Cobra was but could be faster with some work. It's also only got 300 miles on the drivetrain. I was thinking of doing something from the ground up but this one merits consideration.

Ackattack1

iTrader: (7)

Here's a 502 for sale wrapped in a 71 cheyenne body

http://classicgmtrucks.net/forums/in...=0&#entry32462

CharlieCobra03

This is what I could find:

Here at last is the king of all big block crate engines from GM Performance parts. These 502 cubic inch engines come fully assembled and are rated at approximately 9.6:1 compression with 502 hp at 5,200 rpm and 567 ft./lbs. of torque at 4,200 rpm. These complete engine kits make extensive use of aluminum to keep weight down. Including aluminum heads, intake, water pump, and valve covers. Additionally, these engines are full of heavy duty parts including, forged aluminum pistons, forged shot peened steel connecting rods with 7/16 in. bolts, forged steel crankshaft, 14 in. automatic transmission flexplate, four bolt main blocks, stainless steel valves, 6 quart oil pan, and windage trays. These complete engine kits come with generation VI 4-bolt main blocks with 1-piece rear main seals. Hydraulic roller camshaft specifications are .527 in. intake lift, .544 in. exhaust lift, and the duration at .050 in. for intake is 224 and 234 for exhaust with a 110-degree lope centerline. Single roller timing chain and aluminum large oval port 110cc combustion chambered heads. Intake runner volume is 290cc installed are stainless steel valves 2.25 in. intake side and 1.88 in. on the exhaust side. Valve springs are rated at 140 lbs. closed and 368 lbs. open, good for up to .680 in. lift. These heads have exhaust crossovers. Aluminum high-rise dual plane square bore bolt pattern intake manifolds are included.

I'm just curious about the reliability and potential of these engines. The advertised horsepower ain't enough for me.

sardog46

Horsepower TV used one in there nova. It sounds like a great engine. I would call scoggy dickens and talk to one of there reps to find out the real scoop.

Ackattack1

iTrader: (7)

I thought that was a 572 they stuck in the nova

Racehead

I don't think that it's really a summit engine, but rather just a GM crate motor. They do have HUGE potential to make big power. That cam is positively "baby" for a BBC of that size. A 252/260 @ .050 would be a nice street strip setup in that engine, especially if you raised the compression by a full point or so. This would probably raise it's output by 80-100 hp. Also it'll easily and reliably take a 250-300 shot on top of that if you incorporate some type of timing retard.

sardog46

Yhea you are right sorry.

Why don't you just call up one of the big name engine builders and have them put together a 702 and call it a day.

CharlieCobra03

This is already in the car with 300 miles on it.

Ackattack1

iTrader: (7)

oh, so you already have the engine...thought you were looking for one.

well the guy mike (who's truck I posted earlier) seemed to have a few bugs with his. I think they mainly centered around the ignition and carburator. I think he's on here occasionally by the name of miket. Or I can try to find his email. I'm sure he could give you a better idea of what he's done/gone through with it. HIs 502 made 663HP/633TQ, so his is a pretty stout combo.

CharlieCobra03

Yeah, it's in a car I'm looking at, the guy built it and ran outta money. It seems to run just fine but it's a little weak for me the way it sits.

WAHUSKER

iTrader: (4)

WELL, @ 9.6:1 COMP YOU COULD ALWAYS STRAP A BLOWER ON IT!

Or like Bill said, bump the CR up to 11.5 or so (yeah, I went 2 pts) & throw a real cam in it & hang on. I did that to my old 402 & it spun to 7500 all day long. And other than the GT 500 and my Bro's 57 Chebby I never lost a race in that car.

NVME88GT

Throw a real cam in it and spray the sack off of it.

Low N Slow

iTrader: (4)

My buddy put one of these with a 6-71 blower in his jet boat, runs like a champ and has not had any problems in 3 years of hard running.