Finally got a day off to take the boat out for 1st time since installing the new tunnelram setup. After a small bit of tweeking, woooooohooooo!! damn what a difference. Did a bit of tearing it up and decided to stop for a bit in a vacant cove and give everything a quick once over and SHIT oil all over the place.
Well after wiping things down and some closer inspection we discovered it was blowing back out dipstick and breathers at a very messy rate of speed.
I have read that this is pretty normal when running tunnerams (not sure why) but what the heck is the best cure?
460 Ford - basically stock - mild cam.
Any help would sure be appreciated. Weather is finally to damn nice here to be cleaning - time to be terrorizing Thanks devil
Aside from a potential for a possible overfilled crankcase , I'd start with a compression wet and dry compression test and cylinder leakdown test at minimum pull the plugs and read them ... Tom
I am new to jetboating but I'm not new to high performance engines. On a few motors I've built I have had to run a crankcase evac system to relive psi. It is essintualy a hose in each valve cover that runs to your headers to pull the psi. out. I'm not sure if this would work on a jet or not due to the water system. A kit could be had from just about any mail order catalouge for around 50$.
I put a fitting for a line to a puke tank from the pan. This seems to relieve the pressure at least from mine. Also put large Canton valve covers, a piece of vac hose for the dip stick.
Well here is what I am trying 1st --- There are now 3 breathers on the valve covers. 2 of them now have the "baffle style" groments in them, the other has an open groment as it will still be the oil fill as well. I compared all 3 breathers and put the one with the tightest bend in the flap inside the opening hoping maybe it would help.
I am thinking that after realizing the the baffle style groments exsisted and now it isn't a nice unimpeded straight shot off the rockers that things will be all better. Oh ya - also have a rubber carb vent cover that will fit snugly over the dip stick tube if it still wants to fling oil.
Here where I live in Idaho, if the word "performance" is anywhere even closely involved with a part you can flat forget about finding in stock here so this was about the only route I had the option of and still making the lake this weekend.
Will let you know how it goes
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