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turbo help
Posted by: g2schmidt ()
Date: August 12, 2019 12:51PM

Hello to all
long story but will cut to the point.

I am having great difficulty getting a 63 turbo to run on idle. motor was rebuild about 6 months ago and it did run ok then but it sat because of bad brakes I final fix them.
compression is 90 to 95 do not know if thats to low.
plugs look black.
I can only get it to run at 1500 rpms.
the spark color is orange not blue.
vacuum is at 10 inch.
part of my problem is the distributor is wore I can move the shaft side to side on 1/8 " so I put in a 110 one. will that work or do I need to get a turbo one?
any help would be great Thanks Greg

G2Schmidt
Moorhead, MN
1966 Blue Corsa convertible

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Re: turbo help
Posted by: Timothy Shortle ()
Date: August 12, 2019 12:54PM

YES. You need the proper turbo distributor for car to operate properly. (A 63 TC distributor ends in 298). You state you have a 63 turbo. Your signature states a 66. What car are you working on?

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Re: turbo help
Posted by: MattNall ()
Date: August 12, 2019 01:46PM

Running fine before setting 6 mths... has to be idle FUEL circuit!


Remove idle mixture screw and blow 5-10 psi air thru it... Re-install screw and start it, let it warm up.... then try adjusting the idle speed down.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: turbo help
Posted by: g2schmidt ()
Date: August 12, 2019 02:15PM

I am working on a 1963 spyder that my dad did about a year ago. He has passed away a few months ago. So I am trying to fix the car for the owner. he over hauled the motor and drove it to the owner house but the master cylinder was starting to go. then one thing lead to another new brake shoes wheel cylinder
now will not idle.

Thanks matt will try that.

G2Schmidt
Moorhead, MN
1966 Blue Corsa convertible



Edited 1 time(s). Last edit at 08/12/2019 02:46PM by MattNall.

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Re: turbo help
Posted by: alan_smithee ()
Date: August 12, 2019 02:42PM

g2schmidt Wrote:
-------------------------------------------------------
> I am working on a 1963 spyder that my dad did about a year ago. He has pasted away a few months ago. So I am trying to fix the car for the owner. he over hauled the motor and drove it to the owner house but the master cylinder was starting to go. then one thing lead to another new brake shoes wheel cylinder
> now will not idle.
>
> Thanks matt will try that.


Also put back the turbo distributor and vacuum retard canister on that engine

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Re: turbo help
Posted by: MattNall ()
Date: August 12, 2019 02:48PM

alan_smithee Wrote:
-------------------------------------------------------

> Also put back the turbo distributor and vacuum retard canister on that engine.

===================================

Alan... Distributor affects nothing different below 1500 rpm..

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: turbo help
Posted by: Timothy Shortle ()
Date: August 12, 2019 03:20PM

Matt, his original distributor has excessive play "side to side". That will cause running issues. He put in the incorrect distributor. That in itself will cause running issues.

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Re: turbo help
Posted by: alan_smithee ()
Date: August 12, 2019 04:14PM

Timothy Shortle Wrote:
-------------------------------------------------------
> Matt, his original distributor has excessive play "side to side". That will cause running issues. He put in the incorrect distributor. That in itself will cause running issues.


I probably should have been more clear...correct, he said he had some serious play in the turbo distributor so he swapped it out with a 110 distributor. Assuming he gets his starting/idle problem corrected and also assuming that distributor doesnt have the proper canister on it, he is going to encounter more problems down teh road once he does get it fired up and running right?

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Re: turbo help
Posted by: vairmech ()
Date: August 12, 2019 05:13PM

That type of an idle issue is generally a bad accelerator pump diaphragm.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: turbo help
Posted by: MattNall ()
Date: August 12, 2019 05:22PM

Ken do they go bad from setting 6 mths?

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: turbo help
Posted by: texas yenko dude ()
Date: August 12, 2019 05:55PM

MattNall Wrote:
-------------------------------------------------------
> Running fine before setting 6 mths... has to be idle FUEL circuit!
>
>
> Remove idle mixture screw and blow 5-10 psi air thru it... Re-install screw and start it, let it warm up.... then try adjusting the idle speed down.


You NEVER introduce compressed air into an assembled carb unless your goal is to compress and destroy the float!!!

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Re: turbo help
Posted by: MattNall ()
Date: August 12, 2019 06:04PM

texas yenko dude Wrote:
-------------------------------------------------------

> You NEVER introduce compressed air into an assembled carb unless your goal is to compress and destroy the float!!!
======================================================================

Whaaaaat? the bowl's VENT is 100 times larger than the idle circuit you are blowing air into!!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: turbo help
Posted by: Frank DuVal ()
Date: August 12, 2019 06:50PM

Quote
Matt
do they go bad from setting 6 mths?

Yes! Especially with ethanol added fuel.thumbs up

Carter YF, YFA and YH all have this issue with accelerator pumps getting a hole and the idle mixture goes way rich, as the manifold vacuum is sucking directly through the hole in the diaphragm from the float bowl.

I call the Carter YFA on my Ford F-150 300 cu in six a YH turned the wrong way, but works the same!smileys with beer

Explains the black plugs.... if this is found to be the cause.

Frank DuVal

Fredericksburg, VA

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Re: turbo help
Posted by: Timothy Shortle ()
Date: August 12, 2019 07:18PM

I would suggest getting the Bob Helt book on the Corvair Carter YH carburetor.

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Re: turbo help
Posted by: joelsplace ()
Date: August 12, 2019 07:27PM

I'm not scared to use full shop pressure on idle mixture passages. 175psi
If the idle circuit is plugged up take out the mixture screw squirt some spray carb cleaner in and blow it out with full pressure. Start it up quick to get fuel in there to dilute any carb cleaner before it damages something.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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Re: turbo help
Posted by: 63turbo ()
Date: August 12, 2019 07:51PM

g2schmidt Wrote:
-------------------------------------------------------
.
> the spark color is orange not blue.


Fix the spark color problem first! A blue colored spark will usually be a sign
that there is sufficient power going to the plugs to fire under compression...
any other color (yellow/ orange) usually is a sign of a ignition system that is not working properly and wont reliably fire under compression, and although it sounds like there's a fuel problem also, the weak spark will cause running problems until it is fixed. If you need to run the 110 distributor temporarily this could work but DONT try going into boost, because there's no boost retard, only vacuum advance.

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: turbo help
Posted by: JimBrandberg ()
Date: August 13, 2019 06:09AM

A non-turbo distributor should not be installed with an initial timing of 24 degrees. Maybe 14 but that varies between distributors, some are as low as 6. It's a temporary way to get it running but should not be considered permanent.

Anything less than 100#s compression is not good. It may be your tester is not good. Sometimes if the engine has been sitting it "comes back in" with some use. If the engine has been "rebuilt" maybe the piston rings have not broken in, chrome ones are especially slow.

They run super rich if the accelerator pump rubber is torn.
The Carter YH likes about 4#s of fuel pressure. Many mechanical fuel pumps available these days are putting out excessive fuel pressure, I've seen 9#s.

It's encouraging that it ran okay after the "rebuild".

I wish we could narrow it down for you but it's hard from a distance. It could be any number of things. Just one thing or a combination. It would be good if you can post some follow up on how it's going. It can be a frustrating pain trying to get them sorted.

Jim Brandberg
Isanti, MN
CorvairRepair.com



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Re: turbo help
Posted by: Frank DuVal ()
Date: August 13, 2019 07:36AM

Quote
Joel
full shop pressure on idle mixture passages. 175psi

You never heard of regulators?confused smiley

Use one at every point of use to get precise air pressure for tools, painting, troubleshooting, etc.

An example:

[www.amazon.com]

175 too much for tools for good life expectancy or tightening nuts..... But good at forcing air into the skin, see air embolism.

Frank DuVal

Fredericksburg, VA

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Re: turbo help
Posted by: g2schmidt ()
Date: August 13, 2019 11:42AM

Took carb off checked it over blow out passageway. With vacuum at 10 I think there might be a leak. Not enough vacuum to get idle fuel circuit to work

G2Schmidt
Moorhead, MN
1966 Blue Corsa convertible

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Re: turbo help
Posted by: joelsplace ()
Date: August 13, 2019 11:54AM

I have regulators on stuff that needs it. I've found most air tools are really weak at their recommended pressure. I have a 3/8" Craftsman impact that is at least 20 years old and it works great around 150.
I don't pull the trigger on air blowers when the tip is against my skin.
I have a regulator on my rim clamp tire machine so it doesn't pop off the pressure relief on the tank.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

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