TURBO Rebuilding

[luvrbus]

JohnEd, they will not lower the temps that much they are better than nothing the problem I have with the aftercoolers they restrick the air flow and they are only 4 inches wide and 11 inches long no bigger than a auto heater core.
The air going into blower from the turbo is about 600 to 800 degrees and the aftercooler sits under the blower.
Air to air is a lot cooler buy the time it leaves the intercooler back to the blower diesels love cool air to make power.
I think and other do also that a aftercooler will add heat to a 8v92 and other engines like Cat and Cummins.
I do know that 8v92 will run cooler without a aftercooler for a fact and DD tells to remove it when using a intercooler    clear huh  



good luck

[JohnEd]

Cliff,

What you have said seems clear enuf.  It only makes sense to me if there is no aftercooler on the "N" version.  True?  I think I remember a NA version.  Happy to be wrong tough.

Thanks for all the info Cliff....I hope I am not the only one getting something out of your comments.

John

[Dreamscape]

Guys, This thread is very helpful and full of interesting facts. I don't have a turbo, but I' m learning something just in case. 

Great Thread!

Paul

[luvrbus]

JohnEd, the N/A had no turbo the 8v71T and other 71T models used a turbo with no kind of a cooler they used that set up for years still a lot of 2 strokes in use today with no cooler only the turbo.

Here you go Paul the hp ratings for a 8v71 without coolers only turbos

308hp with N-65  injectors

335      "    N-70     "  

350      "    N-75     "

Don Grouley has a 8v71T in his Eagle 335 hp no cooler

good luck

[Dreamscape]

Great info, Thanks Clifford, now to learn more!

Paul

[JohnEd]

CLIFF,

The output orifice on the blower isn't 4 by 11 inches is it?

John

[luvrbus]

JohnEd, the aftercooler inside the block under the blower on a 8v92 is 4in W and 11in L


good luck

[JohnEd]

Cliff,

I got that part.  How big is the output from the blower that sits over the aftercooler?

Thanks,

John

[luvrbus]

Depends on which blower you have the 80% bypass blower is 3-7/8 in W and 13-1/2 in L  



good luck

[JohnEd]

Cliff,

Well, so much for that theory.  The A has 44 sq inches to pass air and the blower has 52.3 so the A is a choke point clearly.  Is the hole that the A sits over only 4 X 11?  If that is true then the A doesn't really cost you anything in terms of flow if the path is going to be choked down to 44 sq inches anyway.

This is interesting to me Cliff.  Thank you for indulging. Even if Paul has gone to bed already.

Thanks,

John

[Dreamscape]

John, You can't get rid of me that easy!

I'm just following along trying to uderstand the process. I just need to find a good source of reading material to really grasp all you guys talk about.

Paul

[JohnEd]

Your questions tell the tale.  Ask away.  If I can't answer, and that may be probable, Cliff or another will help you and maybe ten others that are stuck on the same point.

Who said you could stay up this late? 

John

[Van]

that's eleven right? 

[Dreamscape]

Mama said it was OK to stay up and play!

As I have never had a turbo or been around one I want to know how they work, how it mounts, what to look for and one more thing. What is the best setup for an 8v71?

I've done a lot of searches and have found nothing specific, like a build sheet and specifications etc. Even went to the Yahoo DD site and didn't find much there either.

Links man, I need links!

I'm just ignorant when it comes to all this turbo talk. 

Paul

[luvrbus]

Paul, your funny the links are buried inside these old heads links are for the internet mechanics LOL me I am going to do you like I did you on the brakes then you become smarter and wiser just joking tell me what you need or want and I'll try to help you 



good luck