dippinracing

[F]can someone please tell me the specs on a cam for a merc 330 horse 454 I brought an xtreme marine cam and I am getting water thur my exhaust seems like this cam is too big and sucking water in my engine what is the cam i should use with a wet exhaust the engine is 30 over im trying to get a bit more then 330 horses..[F][/FONT][/FONT] please email me any info.. thanks [email protected]

Gun Slinger

IMHO I would keep the cam and get a set of manifolds with looooong risers, then reversion wont be an issue, but if you cant spend the coin right now, go with something that has around a 236 I and 245 E @ 50 with a 114.00 lobe separation. Most cam companies can custom grind for you to your own specs.

endeavour32

iTrader: (4)

You are not going to be able to run a cam with 236/245 specs. That's a BIG cam for a 454, especially a low compression, peanut port 330. I'm running a cam slightly smaller than the one listed above but with 110 lobe separation. I'm also running Gill exhaust with tail pipes that go all the way through the transom and are dry to the tip. Even with this set up, if I pull the pipes I get moisture all the way back to the elbow. I would look for a cam around 224 and no bigger with stock exhaust. Anything bigger and the exhaust will not allow it to breath and your returns will drop rapidly. There are lots of variables to building a strong marine engine, and if you ask for it you will get a lot of good advise on here.

Thebossbultsma

iTrader: (1)

I went with this cam set up for my stock exhaust havnt tried it out yet but it should work good.

Comp camp 11-445-8. 270 276 218 224 .510 .510 112'

Budman II

iTrader: (1)

Need the specs on the cam you are running to give you a good answer. FWIW, I ran a Comp Cams Xtreme Marine hyd flat tappet in my 454 for years with no sign of reversion, even with silent choice. IIRC, specs were around 224@/236* @ .050, 112 LSA, .540/.548 or thereabouts. Think I still have the cam card at home somewhere.

Have you made sure that it is not something simple like leaky riser gaskets? Condensation can also cause milky oil if your oil temps are not getting high enough.