What are the specs on that cam? Lift, duration, duration at .050, and LSA?

I understand reversion from the cam but I always thought the problem was where the water entered the exhaust at and not the length of the tail. Can water from reversion even get into the oil? How?

WOW again, you said you have a Mandra cam.
Did you call him? Post the cam specs.
He is the expert and will spend an hour on the phone with you and free advise. He will even talk to you even if you do not have one of his cams.

I will post specs of cam tomarrow, i added ten inches of the inner pipe that the exhaust goes through, so the water has to flow further. I only have about 8 inches left to where the flaps are. But i ran boat on trailer for 10 minutes at idle and 3000 rpm setting timing issue with old distributer. Then i shut off water and ran motor 20 more seconds and shut down. When i take the flash light in the tail pipe you see beads of water up the new 10" pipe then on one side it was wet all the way to the further point where the 90 degree riser is falling back into the manifolds.. Again i did this pipe and changed oil today I will run boat thiis weekend and let you know if this is truly the problem.
I called bob he said its not reversion, so i changed head gasket, and every other think and pressure tested everything including block with oil pan off at 40psi so .....

On these type of water in engine issues with headers and exhaust tailpipe systems how about everyone posting pictures of their manifold/header and tailpipe systems so we can see the system and possibly help find the problems for all OSO members with issues.
In our years of engine builds and performance boat engine work we have seen a lot of PLUMBING! that is sometimes the problem, not the build on the engine or the camshaft. There are so many variations and modifications of exhaust systems that verbal descriptions do not show angles, bends, drops, routing, all the missing descriptions that helping an OSO member's - find the problems becomes like trying to pick a winning lottery number!
Just a request and what I think is a great idea.

Best Regards,
Ray @ Raylar

:worthless_without_p

I asked for a new copy of specs but havent received yet, my original is folded down middle so some #'s areent legiable
Lift= .595 blurry
valve overlap 2.4 clear
lobe seperation 114.2 clear
duration 226.2 blurry

if you can read the grind number at the very top of the spec sheet i can decode it for you. are you running 1.7 ratio rockers?

BTW, Bob is out of town on vacation currently.

grind # xa-228-360-232-350-14
thanks

I only new how to post pics on my website.
I show the ss marine exhaust there and a pic of the new 10" pipe we welded on
go to www.concretekpp.com then click stamped concrete tab
and pics are on the right

intake duration: 228
intake lobe lift: 360
in valve lift:.612

ex duration:232
ex lobe lift:350
ex valve lift:.595

lobe separation: 114