I dont know of any direct injected marine engines.

Port injected sure, but injector actually in the combustion chamber - I dont think so but Im wrong constantly.

Good electronic injection is beautiful for sure- Its nice boating everywhere all day without a spec of soot on the transom and part throttle fuel economy is pretty incredible.

All in and said the tradeoff is money, and when the day comes that this thing just stops running I cant really do much about it whereas the carbed mill I can work on myself and actually fix it.

I think there is something to be said for simplicity and ease of use of carbs - its a "regular guy deal" that I can work on myself vs a trip to the shop when the other breaks.

UD

Uncle Dave,

you might agree with this, Laz from Mesa B. is urging me to put oil coolers, he claims that a marine engine oil temp. would run at over 260 degrees on a constant basis and that not even sinthetic oils would stand these temperatures,so there is no option but to have an oil cooler.

I wholeheartedly agree, and mentioned it in one of my first posts. Teague, Dan Olson, have the stuff - I run an older Aeroquip in the small block boat.

If you simply cruise at part throttle you wont have an issue but you didn't build these babies to do that, and oil temp control is critical to longevity.

http://www.youtube.com/watch?v=xfbNkf2FPk0

At the end of these 2 runs my oil temp never exceeded 120 in the pan, and at least one run was wide open for several minutes.

UD

i remember you mentioned it,nice video,i guess i will have to strech a bit more $$$$

Checked the bottom today with a straight edge and it is straight as an arrow , no hook at all on this boat.

That's what I thought, but couldn't be sure, now we can see what they dyno and play the prop tuning game

thats good news.

This puppy ought to roll pretty good when its all tuned up.

As BBC says - the mills numbers will take us to the props- and then we see whats really what.

Next stop- in the "hull" game will be seing if and how much "walk" you get and how is it is or isn't to drive through or out of.

Cant wait to see it go together.

UD

My 255 Formula has it on the outside from the chine to the first step in the hull (12") and from the transom forward about 10". From the first step to the keel (40") it's straight as a string. This area is barely in the water after the hull gets to planing speed. Based on that I don't think I have an effective hook.

[IMG][/IMG]

With my '86 272 that area was completely out of the water over 50 MPH and that's a big reason that the trim tabs become virtually useless at high speeds unless they are moved inward towards the keel ( stated by Uncle Dave). I have a real issue with this because with twins I don't have as much room to move tabs.

Where are you going to get the oil coolers from? Don't buy any merc ones unless you like being raped. Lots of companies have something that will be fine for your engine.

I will have Laz from Mesa Balancing install those he told me we need large ones,he will look into that but I don't think he uses merc,This is what he builds but out of my budget

http://www.mesabalancing.info/Produc...=Marine+Racing