Hemi partially filled block

[whosnext]

Right, partially filled, AKA less cooling capacity. I understand it’s only 33% filled, and You can run a motor 1/3 filled on the street as long as you upgrade the cooling capacity elsewhere. Just have to keep a close eye on the temps, not really a good street motor having lost that amount of cooling capacity. for that matter You can run a full blown Hemi with the block filled on the street for about a quarter mile on alcohol. All I was saying is it was an old race motor for the track and not a good motor to put on the street without chasing overheating issues forever.

 

[Hemirunner]

It’ll be fine, add an oil cooler if you’re concerned will oil temps. Most combustion heat goes into the cylinder head and piston top then transfers into the block as the piston is pushed down.

 

[dvw]

We've been running a tall filled (to the bottom of the water pump hole) 360 on my sons turbo car for years. Never an issue with coolant temp. We do run a small oil cooler to keep oil temp in line.
Doug

 

[RJRENTON]

Only if you want to run alcohol, and lots of it for street use. That was an old trick back when racers only option was using a stock block. They ran alcohol for cylinder cooling and a filled block would have benefit of added bore strength to the bores so you could bore the block a little further than if not filled. Only a run 1/4 mile and done situation. Alcohol is a great fuel for keeping an a engine cool. That’s why only drag cars run it. It cost way more than gasoline and burns at twice the rate. These days you would buy a race prepped block from the aftermarket all machined and completely designed for race use only.

FYI....Alcohol (Ethanol C2H5OH) absorbs heat when introduced in the engine. The process is called latent heat of vaporization and is best when used with high compression ratios, preventing preignition/detonation. Ethanol's (alcohol) detraction is that it has half the energy (heating value) as gasoline, so the solution is you need to burn 2x the volume as gasoline to achieve the same result. The old dragster builders always used a blend of alcohol (ethanol) AND nitro methane in high percentages....maybe 90% Nitro / 10% Ethanol. Nitro methane (CH3NO2) when combusted adds OXYGEN (O2) to the burn, resulting in significantly more power. Nitro methane is very flammable and dangerous. For street driven cars, Nitrous oxide (N2O) is used to produce significant more power using gasoline. The nitrous oxide breaks down at combustion chamber temps to oxygen (O2) which increases the energy of gasoline and Nitrogen (N2) which basically contributes nothing. Nitrous oxide is and dispensed under pressure, usually directly under the carb's plenum and is far safer and cheaper than nitro methane. But use caution....too much N2O can melt pistons..... Just my opinion of course.
BOB RENTON

 

[wyrmrider]

you should be fine as is
do run a high flow (plate behind the fins on impeller ) pump and good radiator
run a standard high flow stat and not 160 degrees- that does not help
run red line water wetter- that helps
or the high buck coolant