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500efi's vs 502/500Hp


Old 06-24-2005, 11:34 AM
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Default 500efi's vs 502/500Hp

Both Blue Motors.
Which is better motor?
More reliable?

What are the issues with EFI's?
What are the issues with 502's?

What you would run if you could run either?

Finally, has anyone ever heard of pulling 502/500 HP
heads "just because" Merlin heads are better? I know
Merlin has good products. But, doesn't Merc Racing put
together a pretty good package.
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Old 06-24-2005, 01:16 PM
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Default Re: 500efi's vs 502/500Hp

They are both 502's

So your question is what's the difference between the 500HP and the 500 EFI.

The only issue I know of on the 500HP is change the valve springs at 200 hours

Thought of another one , if the 500HP has the gil exhaust and the risers are low you have some risk of reversion.

Oh one other thing, I believe that the 500HP was blueprinted and balanced, the 500 EFI isn't.

Last edited by Von Bongo; 06-24-2005 at 06:09 PM.
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Old 06-24-2005, 05:05 PM
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Default Re: 500efi's vs 502/500Hp

Basically from what I have been told is that the 500EFI motor is a better motor. I have HP500 carb motors, I like them-- EFI's would be nicer, but much more money.
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Old 06-24-2005, 10:45 PM
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Default Re: 500efi's vs 502/500Hp

i thought you were supposed to change the valve springs on the 500efi at 200 hours also?
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