91 Burb new Ideas

[Robyn]

Well as usual around my house the plan changes before it ever gets started.

Tranny in the 91 started doing wierd stuff but I dont think its really bad.
TCC is chatttering at low throttle at around 35.
Going to replace filter, fluid, 3rd clutch switch, temp switch and TCC solenoid.

I have some items for sale that may net me enough to purchase a (New)Banks turbo kit.
If this comes to pass I am thinking about yanking the little 6.2 out and cleaning it up some and doing some minimal repairs, like gaskets, seals, timing chain, rear main.
I have a nice (Fresh) J pump that could be turned up as well as a fresh set of squirts.

Yank the heads and clean things up and install a fresh set of the .010" thicker gaskets to help a little with the Comp and to start with a new set thats good to go.
The engine does not use oil and has almost no blowby and great oil pressure.
Maybe roll in a set of shells in the bottom too.

Decisions decisions????????????????

Comments???

Robyn

[ThumperTDC]

http://www.4strokes.com/images/forums/pics/ttdc/smilies/screwy.gif My god, would ya make up your mind :D

Too many toys to mess with. If you get the banks kit, ya gonna save the 6.5 for the hummer or sell it?

[Robyn]

Well now, you should ask.
I have most of the extra parts that came from the two 6.5's already listed on ebay.
I highgraded the stuff and am keeping enough to build a good engine.
I don't need all the duplicates just laying around.

Im going to sell the serp drive setup that came with that engine too.

Looking like I am going to be swapping the 700 from the Blazer into the Monster as the tranny in Monster has hicuped a few times recently.
I think its just the 3rd gear pressure switch though as the TCC will shudder real bad under light load at around 35 but not all the time and only under light throttle.

I bought some oil, filter and stuff yesterday to have a look see.
Will do some electrical fixes and change the fluid and filter and then see how it works. Oil is dirty but smells ok.

I put the Blazers engine up for sale on Craigs list as well as the rest of the little beast.

If I can sell this stuff and there seems to be a lot of interest on the stuff on ebay I will probably have enough $$$ to buy the turbo kit.

The engine in Monster runs fine just a tad low on Horse pressure.
Its been starting great in the cold so that tells me the compression is good and it does not use any oil and the oil pressure is good too.

Too much work to get the GM turbo into the 91 without cut and chop and that's not gonna happen.
A complete banks kit would be sweet, plus all the stuff would be new.

The old exhaust system on the truck is just that OLD and too small.

Oh well never happy.

Going to put one of the 400's in the Hummer.
That will get the sucker off the bench and out of sight.

[wade-ve7trw]

It Is Their Right to change the mind as many times as they like--us boys just have to live with it. As For changing minds and getting more toys i have the same problem just acquired diesel trucks 3;4 and 5. the only thing is that they will have to stay scattered all over the country at present--ran out of room at the shop for all of them. My shop holds 4 and have 5 in it now but arranging to get another one (will hold 8 and room to work too). besides the snow is too deep and the weather too cold and too much work at present to play with them.
Remember:: Leave a light on and keep an eye on the ones in the shop--they multiply too quick to get all the things done that we plan for them.:D :D :)

[john8662]

You asked for it!

My advice that is...

I'd find yourself a good used Banks kit that's complete.

Remember, any time you buy ANY used turbo, it's going to be a piece of crapola anyways, cause you'll have to go through it. It's a guarantee.

I can show you my scrap pile of turbos in the shop if in doubt.

Anyways. get the manual, so you know what pieces you have.

Then call around to some turbo shops (remeber you're rebuilding that turbo you're getting).

Get yourself a .86 A/R T04B (Garrett) turbo exhaust housing with a STANDARD 4-bolt exhaust outlet (banks is 6, remember this detail). for a p-trim exhaust wheel.

Get the housing ~150 bucks.

Have your turbo rebuilt using the new housing, freshen it up!

Save the old housing, but, you won't be using it, it will be a 1.00 A/R or a 1.10-5 housing (too big to spool properly).

Then get on fleabay, find the standard 4-bolt flange and buy it. Get it and weld it to your existing downpipe you're going to use, by cutting off the 6-bolt flange. You do weld don't you? ;)

Freshen up your engine with the usuals, new injectors (don't you call em squirts of something?) and fix the valve cover leaks while you're in that area.

I'd leave the engine alone, run 'er till it quits, personally. Too much work to "freshen" it up, unless you go through the trouble you went through on the '94.

That's part of my story, and I'm sticking to it.

J

[Robyn]

John
SWEET

Well I just got off the phone with a consultant at Banks and they will sell me a 6.2 Kit with the 6.9/7.3 Ford application turbo along with several other upgrades to the kit like an A pillar gauge mount for 3 gauges and include the gauges along with a tranny temp gauge too.
The turbo will be the wastegated unit and they are going to also include the needed stuff to be able to adjust the boost from the cab.

The price was more than reasonable and it includes everything from the turbo and hardware to the tial pipe tip.

With this turbo it should solve the lag issue as well as several other items.

If all goes well and the snow dont get too deep I will be sending them a check soon.
I believe I have my 84 Blazer sold to a local fellow less the tricked out 700R4

I am going to document this little debacle with pix and stuff and it should make for good reading or at worst good laughs.

My time frame on this go round does not allow me to go for the piece it together from used parts route.
I am allowing a couple weeks down time on my Burb later this spring to do this.
I also have to get a right front fender on the beast and a little paint too.
The original owner got the fender a LIIIIIIIIIIIIIIIIIIIIIITLE tooooooo close to the mail box post. ;0(

Any way stay tuned for the next installment

[john8662]

The turbo will be the wastegated unit and they are going to also include the needed stuff to be able to adjust the boost from the cab.



You're going to have to elaborate a little more on this little detail, which I'm thinking maybe a misunderstanding, hope I'm wrong.

Everything sounds good. You'll still have to modify the downpipe for the TE06H to accept a v-band flange, remeber the 6-bolt flange it already has?

Unless they offer another ready-to-go downpipe?

[Robyn]

Banks says the turbo will bolt right up with the kit parts from the 6.2.
If not I can surely turn up a flange and weld it on the pipe dont ya know.

I just got off the phone with a guy that has some turbo stuff on fleabay.
Price is right but the answers he gave make me nervous.

I am going to go new this time around.

Rebuilding a turbo is no sweat. I had the one apart on the 94 and installed new bushings and seals.
Really a no brainer.
I had to turn up a set of bushing pushers to install the new busshings but that was less than 1/2 hour of fiddling at the lathe.
The turbo on the 94 has been working great since summer.

The seal rings were really fouled with carbon and the housing was badly carboned up too.

Took me an afternoon to get it apart and cleaned and then back together with the new parts.
Time for pizza and a beer in there too.

Anyway all will become more clear as this things gets closer and especially when the parts arrive.

There will no doubt be more changes in the plans as we go along.

[john8662]

Yes, the parts assembly is relatively simple on a turbo, but can you balance one assembly at home?

I can't...

But for a patch, yeah, I'll do it (doing it to a GM-8 currently).

Amazing how a little piece of shrapnel manages to bend the blade and make a hole in one of em rather quickly. At least the turbine wheel makes a very nice desk item at work, Probably 12 people had to pick it up today and ask, what's this?

[Robyn]

HMMM
I would not want to be swapping too many parts from other units though.
I am told that the turbine and compressor wheels are ballanced individually when they are made.
The compressor wheel is not keyed to the shaft at all, its a friction fit with a locknut holding it.

With over 10K on the Burb now I think that if there was a ballance issue it would have started shedding pieces by now at the speed that puppy runs.
Oh yess desk items are definately hand magnets.

I am going to ask the local turbo shop how they do the rebuilds.
I have been in their shop and have not seen any ballancing equipment.
I am familiar with dynamic balancing and the instruments used to do such stuff.

I would be willing to bet that the parts are all balanced individually during the manufacturing process.

These parts could be all ready to go and then the assembly would not be bothered by any worries.

To ballance the turbine and shaft assembly with the compressor wheel on it would be almost worthless since the compressor wheel is not keyed or location specific.
Once the unit was ballanced as soon as you removed the compressor to assemble the turbo the ballance would be all loused up.

HMMMM going to make a few calls on this.

Robyn

[JohnC]

I don't have any first hand knowledge about the GM series turbos on these engines, but I used to toy around with the smaller, faster turning Garret turbos used on early SAABs. These were definitely balanced after assembly, as evidenced by the big chunks of impeller nut that had been ground off...

;)

[Robyn]

Yup been there seen that for sure.

The GM turbo had some cuts on the hub area on the compressor side.
The turbine also had some small nips in it on one side too.

These were definately deliberate and not the result of crap going through the blades

[trbankii]

Rebuilding a turbo is no sweat. I had the one apart on the 94 and installed new bushings and seals.
Really a no brainer.
I had to turn up a set of bushing pushers to install the new busshings but that was less than 1/2 hour of fiddling at the lathe.
The turbo on the 94 has been working great since summer.




Took me an afternoon to get it apart and cleaned and then back together with the new parts.
Time for pizza and a beer in there too.


If only more women understood how sexy it is to hear this sort of thing...

:D

[Robyn]

HAAAAAAAAAAAA
Nothing sexy about a girl who is soaked in sweat and smells of diesel fuel and has greasy coveralls on.
HMMMMM maybe a new fashion for this fall !!! ;0)

But thankyou for the compliment.

Robyn sends trbankii a greasy diesel soaked hug.