i have a 66ss i put a crate 502/502 in last summer have 350gears 29/12.50 m/t tires on rear auto hothskin sus. what kind of 1/4 times can i suspect? have 2 1/4 hookers also with 2 1/2 flowmaster ex.

I ran low 12's with mine with some head work a solid roller ....I'm running 10.80 now......

Last summer my 72 went 12.53 @ 108 mph, on Lee street radials, through the exhaust, with 3.55 rear gears. smile.gif

I have a few questions for you guys about your 502's. 1) how do they idle, rough/smooth, do you need a vacum resivoir/will they work with power disc brakes. 2) What stall convertor are you using. 3) what size and type of carb are you using, and what type of fuel pump are you using. 4) and finally probally a dumb question but what type of fuel economy do you get. Sorry for hijacking your thread 91gmc.

Brandon

Originally posted by BK72SS:
I have a few questions for you guys about your 502's. 1) how do they idle, rough/smooth, do you need a vacum resivoir/will they work with power disc brakes. 2) What stall convertor are you using. 3) what size and type of carb are you using, and what type of fuel pump are you using. 4) and finally probally a dumb question but what type of fuel economy do you get. Sorry for hijacking your thread 91gmc.

Brandon 1. Idles nice, smoother than my 396. No vacuum resevoir. Power brakes work good.

2. Sorry don't know, didn't install it, but it deffinately isn't stock, best guess 2500 rpm stall.

3. The 850 holley that came with it.

4. Don't know, haven't checked, and the car is apart now for paint.

I've seen posts of people who either built, or "know they could" build badder engines cheaper, than the ZZ-502.
But if you:
Don't want the hassel of ordering parts,

Finding a reliable machine shop, in your part of the state, that has the time to machine your used crank, and block.

Lack the expertise to assemble and properly check clearences on the build up.

And have heard some of the horror stories of people who tried it.

This thing rocks.
Sure everybody who has one, is making as much power as you. But its super easy to live with (I doubt its economical) it runs just fine on 92 octane gas.

Its really a great engine.
12s on street tires in a car you could take Granny to the market in.

BK72SS -

11.90 at 118.46 on 295/45/18 Goodyear Eagles.

The Sallee Chevrolet “502 crate” motor specs:

Idle Speed: 650 RPM
Vacuum at idle: 13.3 inches
Max. Rec. RPM: 6,000 RPM
Comp. Ratio: 9.6:1
Block: GM P/N 10237292, Cast Iron, Four Bolt Main
Crankshaft: Scat 4130 Forged Steel, Stress Relieved & Shot Peened, Special Heat Treatment
Connecting Rods: Manley Sportsmaster
Pistons: SRP P/N 139518 Forged, 4032 High Silicon Alloy For Tighter Piston To Wall Clearance, Floating Pin, Smooth Dome & Radius Valve Relief
Piston Rings: SRP P/N J100F8-4470-5, File Fit
Camshaft: Crane P/N 168761, Hyd. Roller, Lift (.598" I, .610" E), Duration @ .050" (230° I, 236° E)
Timing Chain: GM P/N 12371053, HD Roller Design
Lifters: Crane P/N 16535-16, Long Travel, Designed For High Lift Camshafts
Cylinder Heads: Edelbrock/Chapman Victor JR., CNC, Oval Port, 112 cc Combustion Chambers
Intake Valves: 2.25" Stainless Steel, 11/32 Stem
Exhaust Valves: 1.90" Stainless Steel, 11/32"
Valve Springs: Crane P/N 99896-16 Valve Springs, Dual Valve Springs
Rocker Arms: Crower, Stainless Steel 1.7 Ratio
Intake Manifold: Edelbrock, Air Gap
Carburetor: Speed Demon, 850 CFM, Vacuum Secondaries, Fuel Line Kit P/N 140006
Distributor: MSD P/N 85551 Billet, MSD 8252 Coil, Digital-6 Plus Ignition Control Box.
Starter: GM P/N 9000852, Gear Reduction
Water Pump: Long Edelbrock P/N 8851
Spark Plugs: #4 Rapid Fire
Plug Wires: 8 mm Red Plug Wires
Fuel: 92 Octane
Oil Pan: Moroso 6 Quart Pan
Valve Cover: Fabricated Aluminum
Damper: Fluidampr, 8" External Balance
Dyno Tested: 605 Ft-Lbs @ 4500 RPM; 606 HP @ 5700 RPM
Fasteners: ARP Head Bolts, Rocker Studs, and Intake Bolts.

Thanks guys. Redrum: I will send you an email with a few questions about your 502 so I won't take up anymore room in 91gmc's post.