How much reversion is too much??
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Are you gaining oil/water? Is the milky oil all up the dipstick or are you seeing condensation on the head and top end components after a long idle? There is a difference. I get condensation with my aluminum heads and low water temps. I use to think it was reversion and I had Stainless Marine TRS dry to the tip tails.
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I've got 540's with 500EFI intakes and cams. I bought some like-new Gil HP500 risers not realizing they had reversion issues. They're so low and therefore the drop is so minimal it's a wonder to me that they could work with any set-up. After wasting a lot of money trying to fix them I finally had the inner tubes extended through the transom to make them dry. Problem solved. They're a little loud, but with slip-in mufflers it's not too obnoxious. Based on my experience, I wouldn't waste my time trying other alterations or band-aids like timing changes etc. If your Gil manifolds have been fresh-water only I doubt they're the problem but they aren't hard to pressure test.
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More timing the less cylinder pressure you will have at idle and it will run smother will act like a smaller camshaft.
You might be able to put a Daytona sensors cdi with a boost retard.
24* head hunter 598 at 10to1 I would run 45* at idle and engine would smooth out. And you can close the trotted plates down a bunch lowering cylinder pressure..
You might be able to put a Daytona sensors cdi with a boost retard.
24* head hunter 598 at 10to1 I would run 45* at idle and engine would smooth out. And you can close the trotted plates down a bunch lowering cylinder pressure..
LE
Last edited by LAKE EFFECT; 10-05-2016 at 04:41 AM.
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Are you gaining oil/water? Is the milky oil all up the dipstick or are you seeing condensation on the head and top end components after a long idle? There is a difference. I get condensation with my aluminum heads and low water temps. I use to think it was reversion and I had Stainless Marine TRS dry to the tip tails.
I'm sure with the HP525 cams and the OE 500HP Gils that there has to be some reversion, and I figured there was. It just never seemed to present itself over the past, and I guess I didn't worry about it. I'll be looking into new risers and or modifying the ones I have.
LE
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If all looks good with the risers, I think I will have some extensions welded into them.
LE