High idle after driving

[Roadster]

Originally Posted by Roadster

Just to clarify, I never mentioned that my TB was worn.....besides doing the dag and the other items on my thread, my idle is perfect and the engine runs great. I don't consider doing the dag a band aid fix, time consuming, yes..... band aid, no
JMO.....😁😁😁

Sent from my SM-G935P using ZR-1 Net Registry mobile app

Sent from my SM-G935P using ZR-1 Net Registry mobile app

[Roadster]

]Just to clarify, I never mentioned that my TB was worn.....besides doing the dag and the other items on my thread, my idle is perfect and the engine runs great. I don't consider doing the dag a band aid fix, time consuming, yes..... band aid, no
JMO.....😁😁😁

Sent from my SM-G935P using ZR-1 Net Registry mobile app[/QUOTE]



Sent from my SM-G935P using ZR-1 Net Registry mobile app

[S.hafsmo]

Originally Posted by Roadster

Just to clarify, I never mentioned that my TB was worn.....besides doing the dag and the other items on my thread, my idle is perfect and the engine runs great. I don't co rider doing the dag a band aid fix, time consuming, yes..... band aid, no
JMO.....😁😁😁

The degree of wear I have only assumed based on the amount of light shining through on your photos. My secondary blades had nowhere near such amounts of light penetrating at the periphery. My primary however was quite bad.
The original layer of DAG on the TBs was also extremely thin, and not a multiple layer buildup.
Referance photo from ZR1Specialist.com

I am not arguing the value of your effort, nor the result, as it is as you say, working perfectly.

I worry that if the wear I believe I can see on the photos is real, there will be minute axial play on the blades, which over time will start wearing out the applied DAG.

Hopefully my worries are unjustified, and a renewed layer of DAG is sufficient as a permanent fix. That would save me quite a few pennies (expensive to ship stuff across the Atlantic).

[BigJohn]

Originally Posted by Roadster

Sent from my SM-G935P using ZR-1 Net Registry mobile app

Saved you a seat at our Powwow and a piece of fried bread with cinnamon and sugar on top!

[Roadster]

Originally Posted by S.hafsmo

The degree of wear I have only assumed based on the amount of light shining through on your photos. My secondary blades had nowhere near such amounts of light penetrating at the periphery. My primary however was quite bad.
The original layer of DAG on the TBs was also extremely thin, and not a multiple layer buildup.
Referance photo from ZR1Specialist.com

I am not arguing the value of your effort, nor the result, as it is as you say, working perfectly.

I worry that if the wear I believe I can see on the photos is real, there will be minute axial play on the blades, which over time will start wearing out the applied DAG.

Hopefully my worries are unjustified, and a renewed layer of DAG is sufficient as a permanent fix. That would save me quite a few pennies (expensive to ship stuff across the Atlantic).

I know your not trying to argue.....I just wanted to explain that to me a Band-Aid fix is a temp and quick fix....not intended for a long period of time....just wanted to bring to your attention that when you spend a decent amount of time on trying to correct a problem, it usually for a permanent solution not a temp one (which you already know).....I try not to do Band-Aid fixes unless absolutely necessary.

Now to clear up the amount of light from the secondary blades.....when I first used the light test, there was no light coming through the secondary blades at all. That was shown and mentioned in one of my threads. Now to my understanding which was explained to me @ Carlisle, when the engines were tested, if they did not idle correctly, then the dag was applied to the secondary blades to correct the problem, and IMO maybe to the primary blade as mine had a sufficient amount of some substance that was applied to my primary blade. Now was it applied from the factory on the primary blade or applied sometime after, that I can't answer. Now to me that was a Band-Aid fix at the factory as opposed to properly seating the blades into the bores. Now as also explained to me is that not all engines required the dag to idle properly, hence why some TB's have the dag and some don't.....apparently some of the blades were seated correctly as opposed to the ones that were not!!!
So just because there is daylight coming through the secondary blades after dag removal, doesn't mean the TB is worn......JMO Now when I removed the TB, I decided to remove the dag completely and start over. Now it is and has been recommended not to remove any of the dag, I did it anyway. Reason being is I wanted to start fresh to learn more about the TB and the application of the dag. I took a chance and it worked out for me.
The dag is a time consuming job....I don't think the dag will wear off as you mentioned above.....reason being is my dag did not wear off....and why do I say that....because of what I mentioned on the first test with the light not shining through....

Now to go on further...(hey I had a beer and can't stop typing)
I still don't have an answer of why I had the idle problem to begin with....remember my idle was perfect until after the first plenum pull. Why did it idle at 900-1100 rpm's after getting into it a little, and not come down to normal when completely stopped until the engine was restarted..... and probably won't know.....the reason being is that I corrected more than one item with the current plenum pull. So I can't say why my idle is perfect now, but am very happy that it is.......lol

Originally Posted by BigJohn

Saved you a seat at our Powwow and a piece of fried bread with cinnamon and sugar on top!

We had quite a chat about you the other night at dinner. Don't worry some secrets will never be revealed.....lol...
That fried bread with cinnamon and sugar on it sounds good....I will attend the next Powwow, save me a seat.......

[Roadster]

Originally Posted by S.hafsmo

The degree of wear I have only assumed based on the amount of light shining through on your photos. My secondary blades had nowhere near such amounts of light penetrating at the periphery. My primary however was quite bad.
The original layer of DAG on the TBs was also extremely thin, and not a multiple layer buildup.
Referance photo from ZR1Specialist.com

My primary blade has light shinning through it and it should, as if it is completely closed, you will probably have a stalling condition.....
As far as the thin layer of dag, probably was.....but on my TB, it wasn't why, I can't answer that, except that you have to remember that my Z was a "captured test fleet car" that was owned and used by GM engineering for 2 full years. They put 27,000 miles on that vehicle. I am sure that they made adjustments during that time to get the settings where they wanted them to be....I wish I had the file of what when on in those 2 years.....lol
And I still have the prototype PROM chip in my car that was developed by Lotus Engineer Tim Holland for the 93-95 LT5's (also have Marc's chip added) So I am assuming that my car was a constant test bed during that time....and I am only assuming.......

[S.hafsmo]

I agree with the opinion of the DAG application being a band-aid from the factory.
Seems I've missed the fact that the DAG was still there when you first opened the TB. On mine there was nothing left, but that could very well be caused by previous owner maintenance.

A fully sealed primary blade should not cause stalling. If that is the case, the whole TB assembly certainly is a rather poorly constructed device. I've fiddled on a few TBs of that era the last few years, but rarely seen such poor blade fitment as on the LT5.

Kinda cool to have one of the test fleet cars. A piece of history.

By the way, did you see the Facebook album posted by one of the engineers behind the original calibration?
https://www.facebook.com/pg/ISJ-Engi...60469727319975

One of the comments also lead to an additional album with more photos from the pre-production era.
http://thepandatrap.com/gallery/ZR-1s