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Thread: elohim1 : Which 502 motor should I use?

  1. #1
    Join Date
    Dec 2006
    Location
    Oxford, Ohio 45056
    Posts
    175

    Default elohim1 : Which 502 motor should I use?

    Which 502 motor should I use?
    Post by elohim1 on Jul 14, 2006, 6:28pm

    Will be running Rockwell axles, tH400, NP205, 46" XML'S.
    I am leaning towards the 502HT , because I know a guy who has a new one for $5K shipped. He also has extras with it ( Hedman block hugger headers, Intake manifold, Distributor,flywheel.) Everythings new. This motor is torquey way down low, but a little concerned about the 338HP.

    Let me here your guys thoughts.

    1) 502 HT(high torque) $5200

    SDPC Part Number: 88890534
    Manufacturer: GM Performance Parts
    Horsepower : 338 hp @ 4,500 rpm
    Torque : 512 ft/lbs @ 2,850
    Compression Ratio : 8.75 to 1
    Block : Gen VI Cast Iron 502, 4.468" Bore
    Crankshaft : Forged 1053 Steel, 4.000" Stroke
    Heads, Chamber Size : Small Oval Port, Gen V, Cast Iron, 118cc
    Valves (I/E) : 2.065"/1.720"
    Camshaft, Lift (I/E) : Hydraulic Roller, 0.480"/0.483"
    Camshaft Duration @ 0.050" I/E : 204/209 degrees
    Intake Manifold : Not Included

    2)ZZ502 $6500

    SDPC Part Number: 12496963
    Manufacturer: GM Performance Parts
    Horsepower : 502 @ 5200 RPM
    Torque : 567 @ 4200 RPM
    Compression Ratio : 9.6:1
    Block : Gen VI Cast Iron, 4.470" Bore
    Crankshaft : Forged Steel, 4.000" Stroke
    Heads, Chamber Size : Aluminum Oval Port, 110cc
    Valves (I/E) : 2.250" / 1.880"
    Camshaft, Lift (I/E) : 0.527" / 0.544"
    Camshaft Duration @ 0.050" I/E : 224 / 234
    Intake Manifold : Aluminum Dual Plane

    3)502 HO $5800

    SDPC Part Number: 12568778
    Manufacturer: GM Performance Parts
    Horsepower : 450 hp @ 5,250 rpm
    Torque : 550 ft/lbs @ 3,500
    Compression Ratio : 8.75 to 1
    Block : Gen VI Cast Iron 4.468" Bore, 4-Bolt Mains
    Crankshaft : Forged Steel, 4.000" Stroke
    Heads, Chamber Size : Rectangular Port Cast Iron, 118cc
    Valves (I/E) : 2.190"/1.880"
    Camshaft, Lift (I/E) : Hydraulic Roller, 0.510"/0.540"
    Camshaft Duration @ 0.050" I/E : 211/230 degrees
    Intake Manifold : Aluminum Dual Plane

  2. #2

    Default robertcowan :

    Re: Which 502 motor should I use?
    Post by robertcowan on Jul 14, 2006, 8:53pm

    if i was going bbc i,d do # 1. torque at low rpm is the ticket. have you considered a 455 olds ? it has over 500lbs of torque at 1/4 of the cost and is a very hi quality engine and you can use all your components too !
    P.S.
    I CALLED THE PAINT GUY AND GONNA DO BUSINESS WITH HIM 4 SURE THANKS

  3. #3

    Default calpyro :

    Re: Which 502 motor should I use?
    Post by calpyro on Jul 14, 2006, 11:19pm

    I have been considering something along the same line, but cheaper. I have been shopping for a Cadillac 500 used to drop into a M37 as my next project. The reason that I am shopping for a Cadillac motor is that bone stock they have tons of torque, widely available, dirt cheap and only 60 pounds heavier than a Chevy 350.
    The fact that you want a Turbo 400 makes it even easier. Cadillac 472 and 500's come connected to that transmission. It is pretty likely that you can get both in good running condition for less than $1000. I just missed out on a 1975 Cadillac with a 500 cid with 67,000 miles that was wrecked for free.
    If your interested check out these sites:
    http://www.cad500parts.com/index.htm
    http://www.500cid.com/

  4. #4

    Default calpyro :

    Re: Which 502 motor should I use?
    Post by calpyro on Jul 14, 2006, 11:27pm

    I should have mentioned some of the specifications from on of the web sites that put a bone stock Cadillac 500 with over 100,000 miles on a dyno: "And the dyno says: 493.5 Lb-Ft at 2600 RPM and 302.1 HP at 3600" Not bad for a stock engine on pump gas!

  5. #5

    Default thetroublemaster :

    Re: Which 502 motor should I use?
    Post by thetroublemaster on Jul 14, 2006, 11:29pm

    Calpyro, I have an old friend that has a 500 and if I remember right a 472 sitting in his shop. This guy is a better fabricator than most everyone I have ever seen. He converts big trucks to right hand drive with all hand made parts amoung many other talents. He also is the best welder I have ever seen. I am due to call him because I do not know any one who can tackle the welding job I presently have. I will ask him if he still has the motors. I could help getting one of them to a forward air terminal for truck delivery to you. Forward air is crazy reasonable. I will ask if you are serious. It can't hurt while I'm there.

    Let me know.

    Al.

  6. #6

    Default thetroublemaster :

    Re: Which 502 motor should I use?
    Post by thetroublemaster on Jul 14, 2006, 11:31pm

    Elohim, go with the deal you found. A very sweet set up.

  7. #7

    Default kwai :

    Re: Which 502 motor should I use?
    Post by kwai on Jul 14, 2006, 11:43pm

    Torque is king.

    Horsepower is for going fast. Torque is for moving mountains.

    A F1 motor has lots of horsepower and is great for going fast but won't move much weight.
    On the other had a big diesel has lots of torque but won't go very fast.

    Basically, HP = torque x rpm

    So for pulling lots of weight at low speeds you need torque not horsepower.


    I am putting a 2003 chevy 8.1L in my truck. Lots of torque and fuel injected. You can find these for around $3k from salvage yards that part out wrecked RV's, etc.

  8. #8

    Default tacomainoh :

    Re: Which 502 motor should I use?
    Post by tacomainoh on Jul 15, 2006, 3:09am

    I thought this was a mud truck???? in which case, you need RPM.

  9. #9

    Default kwai :

    Re: Which 502 motor should I use?
    Post by kwai on Jul 15, 2006, 7:24am

    you're right. If you are going to running high rpm then a motor that develops peak torque in the high rpm range would be preferred. The HT develops higher torque than then HO at low rpms and has a flatter torque curve.

  10. #10
    Join Date
    May 2004
    Location
    Anchorage, Alaska
    Posts
    250

    Default 40grit :

    Re: Which 502 motor should I use?
    Post by 40grit on Jul 15, 2006, 10:36am

    1.)
    for $400 more, you can get the ZZ454 I got, it's got the same 512 ft-lbs, but revs up to 450Hp for when you want to sling some mud...

    2.)nice motor, almost got that one, but couldn't see the extra $1k for the extra 50Hp and 50ft-lbs being noticeable in a big truck..maybe a street chevelle...

    3.)same response as #1, but also, rect port heads are kinda limited,great for high rpm, but lacking a little at low rpm...too big of hole, so no velocity, plus if you go crazy like me and decide to get Edelbrock Pro-flow EFI for it, they don't make it for rect port heads, you have to go all out and get the Victor Pro race EFI that isn't available yet...


    i like your similar path...my 715, ZZ454, NV4500, divorced 205, rocks with Ouverson lockers, 46's and 4 wheel disc...

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