1971 Donzi Classic 18 power....

[Classic18]

Have you thought about color and dress?

actually yes...thinking pure white block (hard to keep clean when assembling) with black components. This will harmonize with the black chrome on the boat....

[Classic18]

Have been working to put my sbc together. I now have light weight Wiseco pistons, pro-gram splayed mains, and for gen crankshaft. Currently looking for a good set of forged rods.

i do have a few questions and looking for guidance.

1) I plan to use a standard sbc oil pump, but am adding an oil cooler and remote reservoir. Do I need a high volume pump?

2) due to the conditions (bounce shake,etc) I am thinking about a Canton deep oil pan. Specifically the 18-100T....thinking this is a good insurance policy

https://www.cantonracingproducts.com...on&key=18-100T

thoughts on both?

[flabum1017]

High volume is good insurance. Extra oil will bypass, not enough oil will destroy an engine. Always over-do lubrication and cooling on performance engines and don't go cheap. If the pan will fit in the boat, use it.... make sure it has baffles.

[Capt.Insane-o]

I'll pm you something about the bypass valve when i get home from work.

[Classic18]

Capn, did not receive anything....

[Classic18]

Any thoughts if my open cooling system will be ok to handle heat from 5500-6000 for 30 minutes?

[Classic18]

Any thoughts if my open cooling system will be ok to handle heat from 5500-6000 for 30 minutes?

bump....

[Classic18]

What better for long term thermal control, a closed cooling system, or open system? Engine is carb

[flabum1017]

What better for long term thermal control, a closed cooling system, or open system? Engine is carb

With a closed cooling system, the engine won't run dry when you lose an impeller, only the exhaust risers and hoses will run dry. It will still overheat, but you have more room for error. And if you put a flow alarm on your raw water hose feeding the pump, you will get an alarm before an over heat. The other plus to closed cooling is more stable temperatures across the rpm range.

[Classic18]

Sounds like it won't really change steady state oil and engine temps....and for $800 I'm not sure it's worth it

[flabum1017]

With raw water cooling, if you lose the impeller, you have a higher risk of damaging the engine. You also will have more corrosion build up in the engine with raw water cooling. With closed cooling, you will have the coolant in the block all the time along with it's corrosion inhibitors. Overall you will have a longer lasting engine and probably better fuel economy. But I guess that's a decision you have to make. Personally, with 30 years experience as a marine mechanic, I'd go with the closed cooling system.

[FUJIMO]

...Personally, with 30 years experience as a marine mechanic, I'd go with the closed cooling system.

Agreed bum. If he lived here in the salt. His boat will always be in clean freshwater in Michigan. Just go with raw water cooling. There's not even a decision to make. Everything lasts forever up there. Lived/boated on the Great Lakes. Actually have relatives on a lake in Waterford as well.

[flabum1017]

Agreed bum. If he lived here in the salt. His boat will always be in clean freshwater in Michigan. Just go with raw water cooling. There's not even a decision to make. Everything lasts forever up there. Lived/boated on the Great Lakes. Actually have relatives on a lake in Waterford as well.

Still, Closed cooling gives you more room for error in the event of an overheat due to a failed impeller or blockage. The engine will not run without water in the block Plus in the cold waters of the Great Lakes, a closed system will provide a constant temperature. But as said that's just my opinion.

[Classic18]

I was wondering if any of you have looked at an air scoop in the back of the boat facing forward where the noise might go to the passengers and driver versus facing rearword where it might pull in some moist spray. If it is pointed backwards, do you think there's a risk of water inhalation? I'm not worried about it coming over the top from backing up, just mist getting pulled in.

[Classic18]

Bump...