Turbo Rebuild Options

chessie4905 · September 26, 2018, 09:28:05 AM

Goeff is right. It is cast iron so it would be only build up. When reattaching pipe, apply neverseize to surface area where v groove pulls against. It will assist clamp to slide and adjust while tightening. If you remove to clean, check surface with straight edge or flat plate after you are done.

luvrbus · September 26, 2018, 09:40:36 AM

They warp every turbo shop has a lathe to resurface the mating surfaces on turbos why would a shop spend 20k if you do it with a file ? Whats being cast have to do with it manifolds ,heads even blocks warp and they are not made of plastic.Scott needs a turbo his is to small for the increase in hp and fuel and he blowing smoke with low boost.I really don't care one way or the other but I know his TV8513 is not going to cut it on his engine,I suggest he talk to Tom

chessie4905 · September 26, 2018, 11:38:49 AM

That is what the straight edge is for. To check for any warpage. Now if he has turbo size issues, that is another thing.

Geoff · September 26, 2018, 02:49:32 PM

A TV8513 is the correct turbo for a 500 or less HP 8V92TA. A/R 1.23. Scott was loosing boost from the exhaust leak.

eagle19952 · September 26, 2018, 02:54:23 PM

Quote from: Scott & Heather on September 26, 2018, 05:38:32 AM
Somewhere I'm pretty sure I mentioned I'm a dad of a 3 year old and 8 month old and a silly busy tour schedule. I'm crisscrossing the country right now giving about 150 events a year. There's a point where it is a better use of my time to buy a rebuild vs play archaeologist and pop it in there and call it a day. Just sayin.

I was thinking Geoff had swayed you towards the recon job

There's a point where it is a better use of my time to buy a rebuild ...
Agreed.
Putting a maybe turbo back on is a gamble less than 50-50

luvrbus · September 26, 2018, 03:00:19 PM

1.23 A/R is for a 400 hp DDEC the 1.39 A/R is good for up to 475 hp on a DDEC and Scott is above 500 hp with his DDEC engine.I recall he is using 4775 injectors too

Geoff · September 26, 2018, 06:13:55 PM

Quote from: luvrbus on September 26, 2018, 03:00:19 PM
1.23 A/R is for a 400 hp DDEC the 1.39 A/R is good for up to 475 hp on a DDEC and Scott is above 500 hp with his DDEC engine.I recall he is using 4775 injectors too

Damn, a pissing contest. The lower the A/R on the pump end, the more boost. Scott would want an A/R as low as he can find and 1.23 is not bad. I have .99 A/R on my 6V92TA with 9G90 injectors and it doesn't smoke at all.

P.S. I don't like getting into this conversation any further. I like Cliff and he is a great person and resource.

Geoff

Scott & Heather · September 27, 2018, 11:56:24 AM

Ok. Got the turbo out. Took me an hour to remove it. Messed up the oil feed metal line during the process so will have to replace that. Turbo A/R is indeed 1.23

Still trying to find the number to determine which turbo it is. Tom did confirm that he's put the TV8513 into an airport fire truck (spec) that was set for 575 hp so he assured me it was fine for my 500 hp use. The exhaust turbines appeared to be a little nicked up, so he's going to do a full rebuild on it for me.

lostagain · September 27, 2018, 12:13:42 PM

"A little nicked up". LOL. Pretty bad. It will be so much better after a good rebuild. I am glad you took it apart.

JC

Geoff · September 27, 2018, 12:25:55 PM

Is that a broken lip on the exhaust center housing? And the exhaust fin damage looks like it is from a wobbeling turbine and worn bearings. That is going to be an expensive rebuild. There is a rebuilt TV8513 on eBay for $1200. Might be cheaper.

Scott & Heather · September 27, 2018, 02:48:49 PM

The scary part of this is that there is zero play in the shaft. Spins freely. So what damaged the hot side turbine fins?

I'm hoping this was from a previous engine blowup puking valve pieces or something and post rebuild they didn't bother to replace the turbo...fingers crossed. My engine has and does run just fine so I'm hoping that damage isn't from this engine...yikes.

eagle19952 · September 27, 2018, 03:23:35 PM

Quote from: Scott & Heather on September 27, 2018, 02:48:49 PM
The scary part of this is that there is zero play in the shaft. Spins freely. So what damaged the hot side turbine fins? I'm hoping this was from a previous engine blowup puking valve pieces or something and post rebuild they didn't bother to replace the turbo...fingers crossed. My engine has and does run just fine so I'm hoping that damage isn't from this engine...yikes.

slivers of carbon can do this.

Scott & Heather · September 27, 2018, 04:06:23 PM

Man I hope you're right don. Here's a closeup of the ugly:

Geoff · September 27, 2018, 04:19:27 PM

You are right, Scott. Some metal went through your turbo. And it is out of balance and the exhaust turbine wheel is rubbing on the housing. Look at the one on eBay, they don't demand a core. Rebuilding yours is going to be costly.

Scott & Heather · September 27, 2018, 04:51:57 PM

Ugh, it's already on its way to Tom in Arizona. I'll see what he quotes me. It is indeed a TV8513 btw.