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Thread: Chev 502

  1. #1
    taxman
    what do you guys think about the 502 in a jet boat????

  2. #2
    502 JET
    I just removed a GMPP crate 450 hp 502 from my boat.I am having it refreshened.I turned a B impeller at 5500.It ran great and took a beating with no problems.The engine has hyd roller cam 4 bolt mains forged crank 7/16 forged rods and JE 700 forged pistons.I think it is a great bang for the buck engine and with the right cam could turn more rpm. Mike

  3. #3
    SmokinLowriderSS
    572 is better.

  4. #4
    BOOGEYMAN
    I run a 502 crate engine in my 79 sleekcraft tunnel and it seems to work great, spins 5,000 rpm.

  5. #5
    Nubbs
    I'm on my second jet boat with a 502. So far I don't have any complaints about them.

  6. #6
    LOWRIVER2
    Stock 502's work great in daycruisers. Good torque and reasonable power. No issues with mine.

  7. #7
    spectras only

  8. #8
    Rocknpalms
    Just put a new 502 with a Victor intake and 750 Demon carb into my Carrera Eclipse. I ran it for about an hour on Smellsomemore and ran great. Speedo on the boat says 72 ish. I bet it will GPS around 68. 5,000 rpm.
    Much more power then the 330hp 454 I took out.
    Also added a droop and loader.

  9. #9
    caribbean20
    I have run a crate 502 w/ the aluminum heads for about 3 summers (about 65 hours, don't use it much). Runs great, only issue is it burns more oil than usual, which is a well-reported trait. I just keep a quart of Castrol Syntec nearby.
    Rocknpalms . . . I also just replaced my dual plane stock GM intake with an Edelbrock Vic Jr. airgap. Along with a more aggessive roller cam (replaced the stock 520 lift hydraulic with a 580 lift hydraulic roller). Also had the Berk pump overhauled and installed a Mag/Bronze A/B cut, droop, ride plate and shoe.
    My boat is a 1988 Caribbean 20', 2,360 pounds, semi-v. With the stock 502, I was turning a worn Berk aluminum A/B cut at 5,200 RPMs and 63 MPH on GPS (the standard Berk HP chart would suggest about 410 HP for A/B@ 5,200, a little disappointing considering the heads, Holley 850, EMI Thunder exhaust and full MSD).
    I just picked up the boat from GS and hauled it back to its home in Boulder City but was not able to run it. Been a long wait all winter to see if I can touch 70 after going to the hip.

  10. #10
    Riverjet502
    I have 6 seasons on my ZZ502/502 and haven't had to open up the engine yet....I'd buy another one if needed...
    http://img517.imageshack.us/img517/4772/50241ta.jpg (http://imageshack.us)

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