Teaser alert.....

[GAShan]

Re: Teaser alert.....

There's one of those in a '55 Mercedes 300SL replica down here. It was at the Homestead Speedway when FAST went to the Speedway Days for pace laps. Anyone have pics? Development of the turbo V6 began when the ZR1 was prototyping as far back as 1984. Ron Gee from GM Powertrain was involved. It was decided the car had to have a V8. For info there is an article on ZR1 engine development discussing it in the June 2000 Vette magazine.

 

[SY2455]

Re: Teaser alert.....

That is similar as well, but the links for the vanes are key and bolted on both ends.

 

[turbodig]

Re: Teaser alert.....

Here's one for Dig.

Oooooo. A real proto/dev ECM!

Note the PROM in the ZIF socket.

The resistors are for calibration.

Could you pull the 3-4 screws and take it out of the case? I'm curious about board numbers and such.

Helluva find.

 

[turbodig]

Re: Teaser alert.....

After continual application of PB Blast overnight & then some heat this morning I was able to remove the CHRA from the exhaust housing.
It's a very interesting wastegate setup. The outer vanes are controlled by the wastegate arm. They all open & close simultaneously to control turbine speed.
Notice how small & little the pitch is on the turbine.

Garrett VNT. These are quite rare birds in that vintage.

They were kinda notorious for sticky vanes... this is why it never made it to production vehicles. In a race environment, you can clean/rebuild every race.

Hope you get it back together!

 

[turbodig]

Re: Teaser alert.....

I got to thinking... does it look like the computer controlled the VNT?

The VNT did more than just boost control. It was sort of a variable A/R exhaust housing that would allow good low speed spool, but then would open up to limit boost and have less exhaust restriction.

 

[turbodig]

Re: Teaser alert.....

cool...if you ever unbolt the top from the bottom of that intake...look on the inside of the upper portion to see if there are any weld lines that you can see. I still have a hard time believing that they casted 3 pieces only/at all.

It looks casted. I suspect that there were probably 20+ casted.

Low volume casting isn't an entirely strange thing to GM. Suppliers will flip over backwards if they think they're gonna get a contract.

 

[4C FED]

Re: Teaser alert.....

I got to thinking... does it look like the computer controlled the VNT?

The VNT did more than just boost control. It was sort of a variable A/R exhaust housing that would allow good low speed spool, but then would open up to limit boost and have less exhaust restriction.

There was only one hose connected from the compressor housing to the wastegate actuator. No control solenoid in sight. Both ends were hose clamped in place, so it's not like someone just slipped the hose on to cover the openings.

 

[turbodig]

Re: Teaser alert.....

One more VNT thing-

They make some nickel-based refinery lube that is good to like 2000 degrees. It'd make good lube to try to clean/free the vanes.

http://www.akd-tools.gr/xmsAssets/File/Catalogues/loctite_anti_seize_us.pdf

 

[4C FED]

Re: Teaser alert.....

Garrett VNT. These are quite rare birds in that vintage.

They were kinda notorious for sticky vanes... this is why it never made it to production vehicles. In a race environment, you can clean/rebuild every race.

Hope you get it back together!

I've put all of the loose parts into a zip-lock baggy. :tup: It's pretty straight forward on how it goes together. It's just a matter of clocking it correctly so that the wastegate arm falls into the slotted hole.

It feels as it it has a slight amount of endplay (thrust surface).
Who would you recommend I send it to for a rebuild?

 

[4C FED]

Re: Teaser alert.....

One more VNT thing-

They make some nickel-based refinery lube that is good to like 2000 degrees. It'd make good lube to try to clean/free the vanes.

http://www.akd-tools.gr/xmsAssets/File/Catalogues/loctite_anti_seize_us.pdf

Thanks.

I also saw this in the loctite pdf: Graphite-50 Anti-Seize
General Characteristics — Highly electrically conductive,
non-metallic anti-seize
Special Features — Highly electrically conductive in
metal-to-metal joints
Industries / Applications — Spark plugs on engines
Might be a better choice than applying the standard anti-seize to spark plugs.

 

[4C FED]

Re: Teaser alert.....

Oooooo. A real proto/dev ECM!

Note the PROM in the ZIF socket.

The resistors are for calibration.

Could you pull the 3-4 screws and take it out of the case? I'm curious about board numbers and such.

Helluva find.

Sure!

 

[FxsX24]

Re: Teaser alert.....

im kinda leaning against the vette thing

it says G.M.C. Division (which could be General Motors Corp, not our GMC brand)

its not likely to be syty related (because we would know about it by now)

i tried to google the head castings and found NO RESULTS

 

[JSM]

Re: Teaser alert.....

I would cover window on the chip itself to preserve the data, too much sunlight etc could erase it.

 

[qbnkiller]

Re: Teaser alert.....

you need to change the date on your camera (2037)!

 

[4C FED]

Re: Teaser alert.....

I would cover window on the chip itself to preserve the data, too much sunlight etc could erase it.

Yeah, the label that was on it fell off while I was removing the cover. I stuck it back with a little tape.

you need to change the date on your camera (2037)!

That was the previous owners camera.


This is the photo I received from SVI today. It looks like the real deal.

 

[turbodig]

Re: Teaser alert.....

Sure!

Anything on the backside of the MEMCAL board?

Did this have an external knock module with it, or does the knock sensor wire run directly to the ECM?

I've heard about these development MEMCALS, but I've never seen a pic. Some of the resistors are the calpak resistors that reside under the ESC chip in a normal memcal. I'm wondering if the others have to do with tuning the ESC itself... I would expect more caps/ active circuits.

I'm guessing the Delco labeled part is SRAM.

I'll see if I can get in touch with some old friends who used to do this stuff.

 

[4C FED]

Re: Teaser alert.....

Anything on the backside of the MEMCAL board?

Did this have an external knock module with it, or does the knock sensor wire run directly to the ECM?

I've heard about these development MEMCALS, but I've never seen a pic. Some of the resistors are the calpak resistors that reside under the ESC chip in a normal memcal. I'm wondering if the others have to do with tuning the ESC itself... I would expect more caps/ active circuits.

I'm guessing the Delco labeled part is SRAM.

I'll see if I can get in touch with some old friends who used to do this stuff.

No, nothing on the backside of the memcal.
I haven't looked at the harness yet to see where the knock sensor runs to.

 

[Try Me]

Re: Teaser alert.....

That pic from svi is very very cool.

I have an 89 Corvette 6 speed. I can see why they would have went with the lotus designed LT5 instead of this. Easier to package in that small engine bay plus can you imagine buying a new Corvette that year and telling your friends it has a v6 in it?

 

[TYTILIDIE]

Re: Teaser alert.....

Wow this is all pretty sweet. You really lucked out Rick.

 

[4C FED]

Re: Teaser alert.....

After some measuring & a desire to keep the motor intact (original), I decided that this will need to be transplanted into a vehicle other than the Syclone.

I'm looking for suggestions. I don't have the funding yet, but I'd like some ideas on what I should start looking for.
It has to be pre-1975 so I can comply with the SMOG Nazi's here in Cali. Have a relatively wide engine bay to accomodate the headers (I forget what width was). And, I would prefer a 2dr, but that's not a must.
Maybe a '60's 6 cyl. Camaro, Nova or Chevelle? Or...a Chevy C10 maybe?