Things I'm doing to improve boost (pics)

eagle19952 · May 27, 2017, 09:13:57 PM

Quote from: Scott & Heather on May 27, 2017, 09:01:32 PM
Ok do tell what is the proper procedure? Check while idling right? Like a car?

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HOT...like at the top of the hill, near the end of the trip on level ground tho

lostagain · May 28, 2017, 06:09:26 AM

Yes check at operating temperature (hot) and idling.

JC

Scott & Heather · May 28, 2017, 08:02:02 AM

Ok and fluid should be at the HOT mark...I'll check this and report back. I'm convinced now that I'm running warm because of my tranny. I've done everything I can to keep the engine cool. Air blower box has been completely rebuilt, brand new gearbox for the squirrel cage blowers, blower box is sealed tight as a clam and at low idle I can toss a rag in front of radiator and it will suck to the grill and stay there. Coolant is fresh and radiators are in excellent condition. I need to get my trans to stay cooler. I disabled my retarder because I don't need or use it for most of my flatland driving. Can I change my spin on trans filter without actually changing the trans fluid or will it dump a ton out?

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sledhead · May 28, 2017, 09:37:31 AM

the 2 spin on filters on mine I would change every year when I changed the oil filter . just make sure you fill all the filters before you install them . I changed my cat transmission to semi synthetic transmission oil and changed the internal filters ( that is a royal pain in the a$$ ) the old internal filters the date was 2007

dave

Dreadnought · May 29, 2017, 05:13:14 AM

Quote from: Scott & Heather on May 28, 2017, 08:02:02 AM
Ok and fluid should be at the HOT mark...I'll check this and report back. I'm convinced now that I'm running warm because of my tranny. I've done everything I can to keep the engine cool. Air blower box has been completely rebuilt, brand new gearbox for the squirrel cage blowers, blower box is sealed tight as a clam and at low idle I can toss a rag in front of radiator and it will suck to the grill and stay there. Coolant is fresh and radiators are in excellent condition. I need to get my trans to stay cooler. I disabled my retarder because I don't need or use it for most of my flatland driving. Can I change my spin on trans filter without actually changing the trans fluid or will it dump a ton out?

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Sounds like it! Thanks for posting all this- very educational to those observing from the sidelines like me- thinking of future 8v92 mods! I guess a manual will stay cooler

bevans6 · May 29, 2017, 05:34:49 AM

The Mechanic's Tips manuals available on-line from Allison include a detailed explanation of how to calibrate (or check the calibration of) the dipstick as installed. It might be worthwhile, if you're checking things and looking for clues, to check the calibration of your dipstick to make sure it's showing the honest fluid levels. My books shows both hot and cold (ref fill) fill levels referenced as a distance to the transmission oil pan flange, and vary based on which oil pan you have and the angle of the dipstick from vertical. So it would be very easy to have an incorrectly marked dipstick after all these years.

Brian

blue_goose · May 29, 2017, 06:52:07 AM

I think you have a Atec transmission, if you do with a silverleaf or prolink you should be able to read the transmission temp. If it is only 10 to 20 deg higher than the engine it shouldn't be a problem.
Jack

luvrbus · May 29, 2017, 07:01:20 AM

Quote from: blue_goose on May 29, 2017, 06:52:07 AM
I think you have a Atec transmission, if you do with a silverleaf or prolink you should be able to read the transmission temp. If it is only 10 to 20 deg higher than the engine it shouldn't be a problem.
Jack

If he has a way to cool the extra 10 or 20 degrees

thomasinnv · May 29, 2017, 08:10:17 AM

My B500 always runs within 5 deg of the coolant temp regardless of load.

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Scott & Heather · May 29, 2017, 08:12:44 AM

Jack, my engine is set to 500hp and is already at it's limit just keeping itself cool. So i think I really need to remove the added heat load of the 748 and have it cool itself via aux cooler. Cliff, your aux cooler is just a little too large for any space I have back there. I could go 29"x28" and that's about maxed out for me. I'll see what Hayden has.

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luvrbus · May 29, 2017, 08:18:58 AM

Quote from: thomasinnv on May 29, 2017, 08:10:17 AM
My B500 always runs within 5 deg of the coolant temp regardless of load.

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Same here Derrick only way I heat the b500 up is with the retarder

Iceni John · May 29, 2017, 06:08:45 PM

I know this discussion is now more focused on the transmission's contribution to the coolant's heat, but yesterday while looking at the Ralph Cantos collection of buses, one of the people there who is an older Detroit mechanic suggested that Woolite is essentially the same as Water Wetter! He said that adding a gallon of Woolite to the coolant would result in better heat transfer from the engine to the coolant and from the coolant to the radiator tubes. An Audi forum I used to subscribe to had several members who said that Water Wetter made a significant difference to their cars' coolant temperatures, and the theory of Water Wetter sounds plausible. (However, lots of things sound plausible "in theory" . . .) I personally hate the idea of additives anywhere, whether for oil, coolant or anything else, so I am very skeptical of this Water Wetter / Woolite idea, but maybe, just maybe, it has some merit, perhaps? Getting the heat out of the engine block is one thing, but then getting that heat conducted through the tubes and fins to the airflow through the radiator is something different. So, has anyone here used Water Wetter (or Woolite!) to lower coolant temps?

While driving back today from my weekend desert trip I had the new transmission cooler's electric fan running permanently, i.e. not controlled by its 195-degree thermoswitch, and I was seeing lower engine coolant temps than ever before. However, I still don't know how much difference was due to A) having a separate oil/air transmission cooler at all, and B) having its fan always on, so the jury's still out on that one. So saying, anything that moves heat to the air must help.

John

bevans6 · May 30, 2017, 04:48:39 AM

I don't know about Woolite, but I used water wetter in most of my race cars. I can verify that it works, and it also reduces corrosion.

luvrbus · May 30, 2017, 05:41:20 AM

I have used Woolite after a oil cooler failure before to help clean the system it pretty good for that.92 series are so sensitive on liner o-rings I wouldn't trust water wetter JMO

thomasinnv · May 30, 2017, 08:47:41 AM

Quote from: luvrbus on May 30, 2017, 05:41:20 AM
I have used Woolite after a oil cooler failure before to help clean the system it pretty good for that.92 series are so sensitive on liner o-rings I wouldn't trust water wetter JMO

Dawn works well for flushing after a oil cooler failure. Pickup truck is on its way to the shop today because of a failed oil cooler. Replaced 25k ago, that didn't last long.

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