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HP 500 camshaft's Do they have a fuel pump lobe?

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Old 07-29-2013, 10:12 AM
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Default HP 500 camshaft's Do they have a fuel pump lobe?

My buddy wants to buy some used carb camshafts for his budget gen IV build. His sea pumps do not have fuel pumps so he would need a pump lobe.
Thanks
Steve
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Old 07-29-2013, 12:31 PM
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No. I have two on the shelf from when i put the 525 cams in my hp's if you need one or both.
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Old 07-29-2013, 02:36 PM
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How much $$$$$
Thanks
Steve
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Old 07-29-2013, 03:57 PM
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Originally Posted by smiklos@sunprint
My buddy wants to buy some used carb camshafts for his budget gen IV build. His sea pumps do not have fuel pumps so he would need a pump lobe.
Thanks
Steve
Make sure he is running some type of exhaust with long risers or one that introduces the water near the transom. The 110* LSA and overlap on the HP500 carb cams tended to revert with the short risers or exhaust that do not have a sufficient degree of drop down to the transom.
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Old 07-29-2013, 06:40 PM
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Originally Posted by Budman II
Make sure he is running some type of exhaust with long risers or one that introduces the water near the transom. The 110* LSA and overlap on the HP500 carb cams tended to revert with the short risers or exhaust that do not have a sufficient degree of drop down to the transom.
Thanks! He has full dry pipes so reversion should be the least of his worries. But with a budget build anything can go wrong.
Steve
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Old 07-30-2013, 08:03 PM
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Is this a Mark IV engine with a fuel pump boss on the block? From the question it sounds like you want to put a Gen V or Gen VI cam with no fuel pump lobe. A good roller cam with fuel pump boss is not the expensive, its the lifters that get pricy.
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Old 07-31-2013, 01:39 AM
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From the question it sounds like you want to put a Gen V or Gen VI cam with no fuel pump lobe.
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Old 07-31-2013, 06:11 AM
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Gen IV block
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Old 07-31-2013, 06:17 AM
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Anybody ever use the lower dollar comp cam packages like http://www.compperformancegroupstore...=MARKIVCAMHRXM. I am trying to get him to pony up for RM builder stuff

Steve
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