66 Coupe Progress Thread

AeroCoupe · Apr 22, 2026

I do not believe you can directly load a video so as suggested above creating an account on YouTube would be the way to go.

DTCRAWLEY · Apr 22, 2026

ok I'll give it a go later on

Noobz347 · Apr 22, 2026

I allow images, tune files, pdf files, and a host of others but [not] do video files.

The files themselves are not the issue. Serving/Streaming those files over the internet is something we're not setup to do.

Youtube is setup to serve video files. Host it there and post the link here. Some people even upload to their Bookface account and post link from there. Whatever works best for you.

DTCRAWLEY · Apr 23, 2026

Noobz347 said:
I allow images, tune files, pdf files, and a host of others but [not] do video files.

The files themselves are not the issue. Serving/Streaming those files over the internet is something we're not setup to do.

Youtube is setup to serve video files. Host it there and post the link here. Some people even upload to their Bookface account and post link from there. Whatever works best for you.

View: https://youtube.com/shorts/NzIPlFAVzcs?feature=share

DTCRAWLEY · Apr 23, 2026

Mcmahst said:
If you’re gonna take it back out again, do us a favor and record the best you can from your phone the experience. Lots of times people believe that their description is adequate for the problem, but hearing and seeing it will help some here who are very good at this.

View: https://youtube.com/shorts/NzIPlFAVzcs?feature=share

DTCRAWLEY · Apr 23, 2026

DTCRAWLEY said:
View: https://youtube.com/shorts/NzIPlFAVzcs?feature=share

Vacuum levels when throttling

DTCRAWLEY · Apr 23, 2026

sorry about multiple videos. Vacuum level when idling, then throttling. Any comments? Is the jump normal or not?

Mcmahst · Apr 23, 2026

Any chance that you could contact the PO and ask him why he put a vacuum pump on the car? I’m just wondering if he installed the engine and then realized he had such low vacuum that he wasn’t getting the break performance that he wanted or expected and he added the pump instead of chasing down the vacuum problem. I think that vacuum is too low at idle. The throttling and changes in vacuum look completely normal with the exception of the vacuum at idle. Just a set of hunches, but first and likely a vacuum leak in the base gasket of the carb, a hidden hole in a vacuum hose, and intake manifold gasket. Next potential problems, and this goes back to to my first question. Intake valves with too much preload, causing a very slight leak.

Did you verify initial timing and total all-in timing? Good luck.

AeroCoupe · Apr 23, 2026

DTCRAWLEY said:
sorry about multiple videos. Vacuum level when idling, then throttling. Any comments? Is the jump normal or not?

You can delete your posts if you want to.

General karthief · Apr 24, 2026

Don't look at the vacuum reading alone, the needle action shows an issue, the needle should be steady at idle unless you have a cam with a lot of overlap,
first adjust the timing to get the highest vacuum reading, you will likely have to adjust the idle too, make your timing adjustments with the vacuum advance disconnected and plugged.
can you get a steady vacuum needle by doing this?

Mcmahst · May 2, 2026

How is troubleshooting the problem coming?

DTCRAWLEY · May 4, 2026

Mcmahst said:
How is troubleshooting the problem coming?

well I know there is a slight cam so i think the vac is what it is. Have not been able to locate a vac leak around the manifold using the carb cleaner spray. Still messing with float level. Seems at higher steady revs it may be starving for fuel. Could be the mixture screws as well.

Mcmahst · May 4, 2026

From your first post, I suspected the problem might be cam timing. You said you have consistent 135-140psi in the compression test. That sounds low to me, especially for a new engine. 165/175 would be my expectations. So, if it is a new engine, and you have low vacuum at idle, and low compression, cam timing would be the first place I would verify. A performance cam usually creates low idle vacuum due to the overlap. But you don’t usually see these cams on engines with low compression, like 8:1 or something around that. If you’ve run out of likely causes, then cam timing becomes more likely; at least likely enough to run it to ground. Good luck.

General karthief · May 5, 2026

Any update on this?
Hard be'n a keyboard mechanic

DTCRAWLEY · May 31, 2026

I'm gonna jump back in this week. Timing is set to 12 deg advanced to 33deg.at throttle. dont know the rpms as no tach,auto trans. I will check everything....timing again, fuel pressure (going to install a regulator setup), bowl float levels, mixture screws, etc. Will remove and clean plugs first and work through everything. The one thing I'm not sure about is that the carb is black from running so rich for so long. Best way to clean it?? Thanks for any input you may have.
Also I want to reroute the gas line to the rear of the motor (Firewall area or brackets on motor or valve cover bolts) as i am going to clean up the front topside of the motor. Should I make metal lines to mount on the "Body" (or motor) and then rubber gas line from the mechanical fuel pump to said line and then rubber lines from said line to carb filter/regulator setup?

General karthief · Jun 1, 2026

You can run a rubber line from FP to the frame rail/fender apron area to a hard line mounted with those nice isolated line clamps, with a bend at the firewall, then a rubber line from the firewall to the carb

DTCRAWLEY · Jun 3, 2026

Thats what I was thinking. currently just have it connected with the rubber hose from the regulator to the carb. when I get around to it ill do the hard mount.

DTCRAWLEY · Jun 3, 2026

working out the timing and float levels, mixture screws etc. I think ( my problem) Im getting close with what little knowledge I've learned on this forum. Its running pretty good .....but a new problem has arisen in that the electric radiator fan shuts off after the motor heats up. It has a 175/185 fan sensor (mounted in the water neck) with a 185 open thermostat. I have jumped the fan control relay to be on all the time and it still shuts off after driving a while. Is there an overheat sensor in the SPAL 16" fan? Dont know why it would shut off when jumpered always on .

General karthief · Jun 3, 2026

You're gonna need to check for power at the fan motor when it stops, at least that's were I'd start.

66 Coupe Progress Thread

AeroCoupe

lube between the nut and the face. I know my lubes

DTCRAWLEY

Member

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

DTCRAWLEY

Member

DTCRAWLEY

Member

DTCRAWLEY

Member

DTCRAWLEY

Member

Mcmahst

AeroCoupe

lube between the nut and the face. I know my lubes

General karthief

wonder how much it would cost to ship you a pair

Mcmahst

DTCRAWLEY

Member

Mcmahst

General karthief

wonder how much it would cost to ship you a pair

DTCRAWLEY

Member

General karthief

wonder how much it would cost to ship you a pair

DTCRAWLEY

Member

Attachments

DTCRAWLEY

Member

General karthief

wonder how much it would cost to ship you a pair

Similar threads

66 Coupe Progress Thread

lube between the nut and the face. I know my lubes

Member

Stangnet Facilities Maint Tech... Er... Janitor

Member

Member

Member

Member

lube between the nut and the face. I know my lubes

wonder how much it would cost to ship you a pair

Member

wonder how much it would cost to ship you a pair

Member

wonder how much it would cost to ship you a pair

Member

Attachments

Member

wonder how much it would cost to ship you a pair

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