[KingLT1]

Originally Posted by ZL1Atlanta

You should have no problems at 23k RPM on a 2650. Do you have a way to ice it on the dyno? I saw where KingLT1 said 118 starting and going up to 170, that's wild for a 2650. I believe you have some form of expansion tank, right?

Here is screenshot of log. I am kind of surprised too tbh.its a little fat because the LTFT are positive and adding 3% on top but that shouldn't matter there is plenty of fuel system.

[ZL1Atlanta]

Originally Posted by KingLT1

Here is screenshot of log. I am kind of surprised too tbh.its a little fat because the LTFT are positive and adding 3% on top but that shouldn't matter there is plenty of fuel system.

Something can’t be right in the cooling system for it to do that. Air in the lines, pump isn’t working, tank is really low on fluid… something. We’ve done several consecutive pulls on mine with no ice, and even if the temp starts higher with hotter water, it circulates enough to keep it around that temp on WOT.

[KingLT1]

Originally Posted by ZL1Atlanta

Something can’t be right in the cooling system for it to do that. Air in the lines, pump isn’t working, tank is really low on fluid… something. We’ve done several consecutive pulls on mine with no ice, and even if the temp starts higher with hotter water, it circulates enough to keep it around that temp on WOT.

I agree...first thing I asked was those same questions. He said tank is full and pump is flowing.

[JSH]

Originally Posted by ZL1Atlanta

You should have no problems at 23k RPM on a 2650. Do you have a way to ice it on the dyno? I saw where KingLT1 said 118 starting and going up to 170, that's wild for a 2650. I believe you have some form of expansion tank, right?

Yea, it has a Rhodes 7.5 gal. tank. It's not flowing as spec'd. It should turnover the tank volume 4 or 5 times per minute. Sometimes MAT goes to 105, other times 140-160. Need a new pump... I think. It's not a pulley issue.

[ZL1Atlanta]

Originally Posted by JSH

Yea, it has a Rhodes 7.5 gal. tank with an external 150L/min pump. It's not the pulley but rather the pump. It's not flowing as spec'd. Sometimes MAT goes to 105, other times 140-160. Need a new pump... I think.

A pump not moving the water as spec’d would definitely explain the issue. Easy fix at least.

[JSH]

Originally Posted by ZL1Atlanta

A pump not moving the water as spec’d would definitely explain the issue. Easy fix at least.

Yea, when I saw the temps and pulling IAT advance I knew something was wrong and I'm sure King did too. It felt very rough too.

Of course, I don't know what it did on the dyno with the 112mm because... I don't have any logs

[JSH]

High MAT and lost hp problem has mostly gone away but remains puzzling. MAT might be 150 on a pull and 120 the next. Could the thermostat cause this? Lowest temp today on last pull (at the track). Very odd.

[Z OH 6]

Originally Posted by JSH

High MAT and lost hp problem

So, not an exhaust pipe issue then.

[Camaro1973]

Originally Posted by Z OH 6

So, not an exhaust pipe issue then.

Lol. He is all over the place with his responses. He don’t know if he’s coming or going.

[JSH]

Originally Posted by ZL1Atlanta

A pump not moving the water as spec’d would definitely explain the issue. Easy fix at least.

Is your pump external or internal and what capacity? Rule 2000, or Rule 3700 or?

[ZL1Atlanta]

Originally Posted by JSH

Is your pump external or internal and what capacity? Rule 2000, or Rule 3700 or?

It is a standalone Stewart EMP pump. They are rated at 7.7 gpm if I remember correctly.

[JSH]

Originally Posted by ZL1Atlanta

It is a standalone Stewart EMP pump. They are rated at 7.7 gpm if I remember correctly.

Rule makes water pumps with much higher capacities. Are higher volumes/min. a benefit to cooling?