Offshoreonly.com - head swap ?

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brians fever

11-08-2009 09:16 AM

head swap ?

how much difference is there between 502 mag heads and hp500s both carb motors looking to sell my 500 heads to a freing but want to make sure there will be a gain for him.

Young Performance

11-08-2009 12:23 PM

If they are both Gen VI heads, then they should be the same casting (088, I think). The 500 heads will have rocker studs and roller rockers and the 502 Mag heads have a non-adjustble valvetrain with stamped steel rockers.
Eddie

BadDog

11-08-2009 04:58 PM

Valve size the same? I thought the HP500's had 2.25 vs 2.19?

Griff

11-08-2009 08:08 PM

Quote:

Originally Posted by BadDog (Post 2987652)

Valve size the same? I thought the HP500's had 2.25 vs 2.19?

I think that is correct as well as what Eddie said.

brians fever

11-09-2009 07:03 AM

thanks guys the castings are the same but the valves are bigger and they are a better valve.

Rookie

11-09-2009 07:06 AM

I don't believe there would be a noticeable enough gain to warrant the change. Let alone the expense of new head gaskets.

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