HP 500's-Most hours?
 

Who has the most hours on HP 500 EFI's? Im @ 430 and they run great, but I hearing refresh soon. Wondering who has run them up and who has refreshed-chose to or had to?

Thanks in advance.


PS- If refreshing, Im thinking of whipples and drive beef up- might as well get some more power while they're out-any feedback on that setup would be cool.

Re: HP 500's-Most hours?
 

The Whipple is the best blower out there and you will be very pleased!!

Re: HP 500's-Most hours?
 

my 500efi is out for rebuild ( bore/stroke) after 447 hrs by choice. I figure at least 1/2 of those hours are at 5000 rpm or better. Solid piece of performance engineering. Now, if only drives would last that way :(

Re: HP 500's-Most hours?
 

I am around 450 hours changed my valve springs around 350, Did a leak down and mech said the pressure was still like new, in great shape. SO I am going to keep her stock and keep going.

WILL

Re: HP 500's-Most hours?
 

No, I don't think so. I'm told that the only difference between the 500's and the 525's are the aluminum heads built for Merc by Edelbrock and the closed loop cooling.

Re: HP 500's-Most hours?
 

500 efi is the "Official Engine" of ORL. Affordable , dependable and there are many out there. If you guy's know where some are for sale let me know! Thanks.

www.offshoreracingleague.com

Re: HP 500's-Most hours?
 

Just springs and no valve job? I was told Valve job needed motors pulled and might as well rebuild?

I think I'll run leak down first and then see if I can milk em for another 400 :cool:

Anyone else got high hours w/ no work done?

Re: HP 500's-Most hours?
 

Not closed cooled and yes have been salty 1/2 dozen times-

Re: HP 500's-Most hours?
 

75% of my hours have been under 4500 rpm, do you mind sharing the total cost for your rebuild, roughly?

Lucky for me drives have been solid for XZ's. One minor repair.

Re: HP 500's-Most hours?
 

what make and model boat are they in ? weight ?