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500efi's vs 502/500Hp

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Old 06-24-2005, 11:34 AM
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LA3
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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?

Pros/Cons?
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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