cranetruck

Installed two more temperature probes today to measure the effect of the water cooled intake manifold.
Drilled a 1/16 inch dia hole at the cylinder #5 intake (see image) and also a 1/16 inch dia hole in the intake manifold adapter.
Two thermocouple bead type probes were installed.
I also installed a temporary pressure/vacuum gauge to monitor the air filter canister vacuum.

After warming the engine to about 175F and making preliminary measurements, I took the deuce on test drive.
On a long uphill run in 5th gear at 55 mph the engine temp was 185F, the pyro showed 1,100 F, the boost gauge 10-11 psi, the adapter temp 222F and the temp at #5 cylinder 210F. The cooled intake manifold acts as an itercooler here.

Love that friggin multi!

The vacuum was 2 inches of water at 2,000 rpm, it pegged the needle at 2,500 rpm (conditions as above). The gauge only goes to 2 inches.

Attached Images

	filter_canister_vacuum_031206_469.jpg (172.1 KB, 539 views)
	drilling_manifold_adapter_031206_925.jpg (201.8 KB, 542 views)
	adapter_temp_031206_101.jpg (161.4 KB, 539 views)
	intake_manifold_temp_031206_128.jpg (185.7 KB, 543 views)

Bjorn
Virginia's Blue Ridge Mountains

(Link to PS magazines: http://old.steelsoldiers.com/index.php?name=gallery)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom. Heated dual tank system for biodiesel/veggie oil use.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor, the "improved" MV.
"Some things can't be made better, just differently......a lot of things actually"

cranetruck

Mounted the DVM/thermometer on the air intake since the thermocouple wasn't long enough to reach the inside of the cab from the intake manifold adapter.

Attached Images

	dvm_on_air_intake_031206_172.jpg (194.7 KB, 540 views)

Bjorn
Virginia's Blue Ridge Mountains

(Link to PS magazines: http://old.steelsoldiers.com/index.php?name=gallery)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom. Heated dual tank system for biodiesel/veggie oil use.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor, the "improved" MV.
"Some things can't be made better, just differently......a lot of things actually"

Recovry4x4

There is so much more to these engines that us commoners haven't discovered. Sure a bombed B series might outrun it but I really love my multifuelers! Great information Bjorn.

Mr Minimum Bid.

M108 M1008
M35A2C M105A2 (X3)
M101A3 M116A2
M116A3

This Steel Soldier Honors the Living Memory of David Frankenhauser, 1954-2009.
May you Sail in the Grace of Our Lord, Chaplain!

“The earnest prayer of a righteous person has great power and produces wonderful results.” James 5:16.

Djfreema

That is some really great info! Once again, another successful experiment by Cranetruck! Now I will stop daydreaming of a big FMIC on my duece.

cranetruck

The results are preliminary, but interesting never the less. The filter vacuum reading is inconclusive since the gauge pegged out at 2 inches of water. Incidentally, the air compressor is getting its air from the canister as well, but there was no indication on the gauge when it was loaded (sucking air).
The ambient was about 62F. Deuce as shown below.
The air temperature must be different for the individual cylinders since the paths from the intake manifold adapter vary in length. Number 3 cylinder must be getting hotter air than number 6 for example.

I drilled the holes knowing that some debris would fall on the inside of the manifold, but it's all aluminum and a test drilling on a spare manifold resulted in very little debris. The thermocouple probes are 1/16 inch dia and fit snuggly in the holes.

Attached Images

	antenna_installed_031206_527.jpg (209.5 KB, 523 views)

Bjorn
Virginia's Blue Ridge Mountains

(Link to PS magazines: http://old.steelsoldiers.com/index.php?name=gallery)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom. Heated dual tank system for biodiesel/veggie oil use.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor, the "improved" MV.
"Some things can't be made better, just differently......a lot of things actually"

cranetruck

Installed a vacuum gauge with a wider range to measure the vacuum in the filter canister. Made another test run.
With a pyro reading of 1,100F and a boost of 11 psi, the vacuum reading was 20 cm of water. That was the max I saw.
This is a new filter with about 1,000 miles on it (courtesy of Kenny Engle) and should provide a reference for you who may want a different filter cartridge.
BTW all the test runs today were made with 100% petro diesel.

Bjorn
Virginia's Blue Ridge Mountains

(Link to PS magazines: http://old.steelsoldiers.com/index.php?name=gallery)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom. Heated dual tank system for biodiesel/veggie oil use.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor, the "improved" MV.
"Some things can't be made better, just differently......a lot of things actually"

Djfreema

It would be interesting to see the filter canister vacuum readings with a K&N air filter and aslo the charge air temperature readings before and after a K&N filter.

mangus580

Great Info Bjorn!!! Glad you were able to do it. Now that leaves one question to ponder..... would an intercooler be of benefit? Is there any benefit to dropping that temperature even more?

Mike
Steel Soldiers Support Staff
1970 M35A2 W/W
1986 M1009
1952 M37

rizzo

how are you cooling the intake?

mangus580

cooling is happening by the antifreeze coolant that goes through the intake by design of the multifuel engine.

Mike
Steel Soldiers Support Staff
1970 M35A2 W/W
1986 M1009
1952 M37