Advice on H2o to Air Intercooler ???

[JR_PRO]

I know this may be a dumb question but my curiosity has me peaked and hopefully with all the knowledgeable gear heads around here maybe someone can help. I have a boat that has a hopped up engine that is running a Barry Grant 650 CFM carb (no forced induction). In Texas during the summer the air temp can be 100 degrees and the engine is raw water cooled and the lake water can also be approaching 90 degrees. Run the boat around for 30 minutes and shut off the engine for another 30 minutes then lift the engine cover and it can reach 275 degrees inside the engine compartment. Tons of heat soak and the excessive heat will cause a little fuel to perculate out etc. It gets so hot under the engine cover because unlike a car/truck that has a radiator in front that air can flow thru or is open on the bottom under the car/truck which allows a breeze that can blow slowly allowing heat to escape and the engine to cool off. In a boat in the summer after you have run it for a while and turn the engine off, the engine will be very warm even the next morning. The engine in the boat is sealed up tight on the sides, top and bottom and when sitting still there is no air at all entering the engine compartment...just stale hot air which takes much longer for the engine to cool down. Since I have no radiator and an endless supply of fresh water, I saw a neat water to air intercooler kit for around $300 for engines up to 600 HP. Would be very easy to install and run water thru it...no problem there as I don't need a radiator, just tee off the water inlet hose, run to the IC, exit the IC and use a pisser on the hull to dump out the water. My question is...can you even run an intercooler with no forced induction? Without forced induction will a 650-700 CFM carb be able to pull air thru an intercooler fast enough or without forced induction does the intercooler just act as a restriction causing havoc with the carb?

I am assuming that the carb does not have the force/signal to pull air thru it like a SC but I just had to ask some of the pros around here with Forced Induction and intercooler experience...anyone care to comment (I hear laughter)???

On another note...would this kit work on a Roe SC?

http://www.frozenboost.com/product_...=1007&osCsid=a5bfb5566231bf3c48268c039297a964

http://www.frozenboost.com/product_...=1006&osCsid=a5bfb5566231bf3c48268c039297a964

Thanks!

 

[Voodoo]

how about a electric water pump on the motor with a switch to keep water flowing threw the block, that should cool it down when u shut down.

 

[JR_PRO]

how about a electric water pump on the motor with a switch to keep water flowing threw the block, that should cool it down when u shut down.

That may work...right now it has a raw water pump that is belt driven off of the motor that pulls water out of the lake up to the water pump on the front of the engine only when the engine is running. An electric pump would have to tie in between the raw water pump and the water pump on the engine..thermostat would be open at that point and maybe have it run for 5 minutes or so to circulate....I'll check the shop manual for how the water flows around. I do know that all the engine water is eventually flushed out the exhaust headers...hmmm.

Thanks!

 

[belgiumbarry]

I know this may be a dumb question but my curiosity has me peaked and hopefully with all the knowledgeable gear heads around here maybe someone can help. I have a boat that has a hopped up engine that is running a Barry Grant 650 CFM carb (no forced induction). In Texas during the summer the air temp can be 100 degrees and the engine is raw water cooled and the lake water can also be approaching 90 degrees. Run the boat around for 30 minutes and shut off the engine for another 30 minutes then lift the engine cover and it can reach 275 degrees inside the engine compartment. Tons of heat soak and the excessive heat will cause a little fuel to perculate out etc. It gets so hot under the engine cover because unlike a car/truck that has a radiator in front that air can flow thru or is open on the bottom under the car/truck which allows a breeze that can blow slowly allowing heat to escape and the engine to cool off. In a boat in the summer after you have run it for a while and turn the engine off, the engine will be very warm even the next morning. The engine in the boat is sealed up tight on the sides, top and bottom and when sitting still there is no air at all entering the engine compartment...just stale hot air which takes much longer for the engine to cool down. Since I have no radiator and an endless supply of fresh water, I saw a neat water to air intercooler kit for around $300 for engines up to 600 HP. Would be very easy to install and run water thru it...no problem there as I don't need a radiator, just tee off the water inlet hose, run to the IC, exit the IC and use a pisser on the hull to dump out the water. My question is...can you even run an intercooler with no forced induction? Without forced induction will a 650-700 CFM carb be able to pull air thru an intercooler fast enough or without forced induction does the intercooler just act as a restriction causing havoc with the carb?

I am assuming that the carb does not have the force/signal to pull air thru it like a SC but I just had to ask some of the pros around here with Forced Induction and intercooler experience...anyone care to comment (I hear laughter)???

On another note...would this kit work on a Roe SC?

http://www.frozenboost.com/product_...=1007&osCsid=a5bfb5566231bf3c48268c039297a964

http://www.frozenboost.com/product_...=1006&osCsid=a5bfb5566231bf3c48268c039297a964

Thanks!

i don't think so... with the Roe.Problem is we don't have acces to the high pressure side ( = hot air side ) . Yes we could built a cooler ( water or air cooled) to go between manifold and SC ... but there is no hight availeble anymore under the hood...

And don't have seen real figures about but Roe stated that heat input with the big twin screws isn't that much to have a great advantage , even if it should be possibel.....:rock: