MCI 96A3 6V92TA Swap to an 8V92TA

[6805eagleguy]

Van what combo do you have now?

[luvrbus]

The 8v92 was a option for 96A3 , cooling you would need to upgrade the blower fans and radiators ,engine rails for MCI's are a dime dozen at scrap yards and the 8v92 uses the same rail as 1000's of MCI  that used the 8v71 

[Van]

Van what combo do you have now?

Currently have an 8v92/740. My other bus had a 6v92/740 @ 330hp.

[brettpearson67]

The 8v92 was a option for 96A3 , cooling you would need to upgrade the blower fans and radiators ,engine rails for MCI's are a dime dozen at scrap yards and the 8v92 uses the same rail as 1000's of MCI  that used the 8v71

Do you know where a scrapyard is located? I'm in North Georgia.
Would the fans be at a scrapyard as well?
Can I assume that parts from the 102 would fit, as well?

[blue_goose]

Try Lewis Bus Lines in Augusta, GA.  Talk to Joey
Jack

[TomC]

6V-92TA is a good old workhorse. At 350hp, you'll get a service life of around 300,000mi. Keep the 6V-92TA. If you want to improve performance, use 9G90 injectors, bypass blower, remove the below blower aftercooler and replace it with an air to air intercooler. I have the air to air intercooler on my 8V-71 and works well. Virtually all big Diesels now have air to air intercoolers-why? Because they get the hot turbocharged air down the coolest (say dense cooler air) then any engine cool aftercooler. Good Luck, TomC

[chessie4905]

I don't think most coaches should use intercoolers in their 2 stroke engines. The cooling is already marginal and then add that additional heat into the cooling system? It may have been a ok idea in a semi, but not in a coach. Eagles probably built one that can handle it with their huge radiator. Changing to air to air would definitely take heat load off the radiator,s.

[MagnoliaBus]

remove the below blower aftercooler and replace it with an air to air intercooler.

I guess any size air to air would be better than the small aftercooler... how did you sized yours ?

[Geoff]

I think you guys are daydreaming.  Air to air coolers are grossly inefficient compared to liquid radiators.  How about a huge freon cooler?

[luvrbus]

Detroit has offered air to air coolers for many years it is the way to go if you have room ,Cat and Cummins offered the after cooler also when space was limited

[MagnoliaBus]

Detroit has offered air to air coolers for many years it is the way to go if you have room ,Cat and Cummins offered the after cooler also when space was limited

That would be a good subject for another thread...

[Geoff]

That would be a good subject for another thread...

What?  I was just about to talk about my swamp cooler...

[brettpearson67]

I can buy a fire truck with the 8V92T and 740 tranny, and very low miles. Would this work, or is the engine rotation different?

[bevans6]

The engine rotation is fine, but you might have issues with the engine mounts, the bell housing, the flywheel size, accessory drives and mounts.  MCI's are odd ducks when it comes to that stuff.  I installed a NATO tank engine into my MC-5C, getting the engine dressed right was a lot of work.

[TomC]

There is a real good reason virtually all vehicle Diesels have air to air intercoolers-they're more efficient. My Cat 3406B 1985 was the only year of radiator aftercooler with a maximum truck rating of 400hp. 1986 they changed to air to air aftercooling and the horsepower jumped to 425hp using the same injector settings.
The main thing to do when sizing the proper air to air intercooler, is air flow. Working with a custom air to air manufacturer, they will typically know the CFM that has to flow. Mine has 4" in and out. But, I only work at 15psi. Good Luck, TomC