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Topics - shelbydoug

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1967 Shelby GT350/500 / Hard hot starting
« on: September 23, 2020, 10:56:04 AM »
I've been chasing a hot start problem that I just can't find.

The engine starts fine cold. Runs fine.

In trying to restart it warmed up, it's being difficult.

I've isolated this down to the coil firing at something like 25% of what it should or what it fires at cold.

Also the tach won't rev over 1,200 rpm.

What's been done so far, cleaned all grounds and checked for resistence. New ignition switch. New ignition coil (the third one). Switched to yellow top with new resistance wire to ignition. Took out Petronix and went back to ignition points.

Coil phenolicly isolated from engine heat.

Again, this is the ignition not firing hot. Carbs are not involved in this. This won't even fire hot with starting fluid.

...and yes Coralsnake, pump gas with ethanol (corn juice) in it.  ::)

In 50 years of running these cars, I can't say as I've ever encountered anything exactly like this and stated plainly, I'm stumped.

I'm open to CONSTRUCTIVE ideas. Nothing like, well push it off a cliff or gt a Corvette please? :o

1967 Shelby GT350/500 / 67 scoops blacked out?
« on: September 23, 2020, 10:16:39 AM »
The previous discussion about blacked out scoops was for '68s.

I presume that the '67s should be blacked out also?

Wanted to Buy / C60A FE bellhouse
« on: September 12, 2020, 11:14:43 AM »
I'm looking for a nice C60A 428 "big clutch" Ford cast iron bellhouse with a nice clear casting date of May 1967. The later the better.

7E31 would be perfect.

Anyone have one they are willing to sell?

PM me.

The Lounge / 2x4 Phenolic fuel log
« on: August 29, 2020, 04:45:48 PM »
In a prvious thread there was a discussion about how to reduce fuel line heat sink in 67 GT500s.

If you have attempted to live for any period of time with one, you may have noticed that they can be temperamental and difficult to re-start a hot engine?

Several remarked that they were convinced that the Ford fuel log used was part of the issue

This is what I did for that particular issue.

This black tubing is Delrin. It is generally about 98% or more non absorbent of heat or cold. It always seems to be cool to the touch regardless of how hot it gets and your hand will never freeze to it in sub-zero temps.

This particular piece is 1 inch od, and half inch id. That's a 1/4" thick wall. You can't insulate the fuel much more than that.

These support brackets are aluminum, and rather then running to the intake manifold bolts run to the mounting studs for the carbs.

At the moment I like it in black. I had intended to paint it with Eastwood bronze  carb renew to make it look a little more stock but for the moment I'm holding off on that.

It's been installed and pressure tested but hasn't been put through the paces yet. So far, so good.

This is just a hypnotic subliminal suggestion to some of you still searching for more help on the heat sink issue.

I'm not attempting to corrupt those away from the purity of the original part. Just maybe whispering in your ear?  ;)

This ones on my 347 in my 68 so if all goes well, the 67 GT500 can expect one also.

1968 Shelby GT350/500/500KR / 68 Automatic shift lever
« on: August 15, 2020, 03:06:32 PM »
I need an entire shift lever assembly for my 68 GT350.

The aftermarket is listing two varieties. One with a console. One without. This is news to me.

Is there anyone here who can comment positively on this? Confirm or deny? If so, which one do the cars use?

1967 Shelby GT350/500 / Holley carb issue
« on: August 10, 2020, 04:59:25 PM »
One of my carbs has a leak between the inlet valve o-ring and the bowl casting bore hole.

The carb is flooding and it is not the valve seat.

I looked for a crack unsuccessfully then used a 320 grit paper roll to "clean up" the bore, even though I didn't find an issue for the o-ring to seat. It didn't help.

Here's the question, should I look for a larger o-ring, try brake fluid to expand the o-ring or replace the bowl? This time it isn't the inlet valve Drew, it's the o-ring not seating tight enough on the bowl casting.

1968 Shelby GT350/500/500KR / 12v yellow top coil
« on: August 01, 2020, 07:24:10 AM »
I came across this offering on the CJ Pony website.

Can anyone here speak to the durability of this coil?

1968 Shelby GT350/500/500KR / resistance wire install
« on: July 31, 2020, 07:32:38 PM »
This is the reistance wire I bought. It has male bullet connectors at both ends.

It is obvious that one end will just plug into the bullet connector on the tach output.

Why is there a bullet connector on the coil end? Is there an adapter to use on the coil?

Which end goes on the tach?

1967 Shelby GT350/500 / ignition resistance wire
« on: July 27, 2020, 05:36:44 PM »
How many ohms is the original pink resistor wire? I need to replace mine. I don't see who sells them separately.

1968 Shelby GT350/500/500KR / C7ZX fan clutch
« on: July 09, 2020, 09:43:38 AM »
I'm still using the original fan clutch. How can I test it to see if it needs a rebuild or not?

1968 Shelby GT350/500/500KR / Oil dipstick sealing
« on: June 30, 2020, 09:02:50 AM »
I'm searching out idle rpm vacuum leaks.

The dipstick tube seems to account for about a loss of 2 inches of vacuum at idle if open.

Here's the question, is the dipstick itself supposed to have a gasket or o-ring installed in it to seal that tube off completely?

The other big loss of vacuum at idle is the PCV. It leaks something like 4 inches at idle and it is supposed to be completely closed at idle, but that's the subject of another annoying post by me, and yes dual4barrel, I know about the M.E.Wagner PCV and have one. That one only leaks about 1 inch of vacuum at idle.  ;)

1968 Shelby GT350/500/500KR / Thermostatc vacuum switch
« on: June 29, 2020, 09:27:04 AM »
The vacuum tower on top of the thermostat housing.

What is it supposed to do? How do I test it to see if it's working?

On a manual shift car, it's my understanding that 1) when cold it is completely closed 2) the engine vacuum goes to the bottom port 3) vacuum advance to the middle port 4) top port to timed vacuum on the carb?

Is it supposed to re-route vacuum depending on engine temp?

The Lounge / Holley 1848
« on: June 23, 2020, 01:06:01 PM »
Look at the sight plugs on this carb. Why are they so different?

The Lounge / SAAC App
« on: June 23, 2020, 10:54:13 AM »
Wouldn't that help using smart phones? Mine is pretty stupid and needs all the help it can get?

The Lounge / Boss 302 oil cooler adapter
« on: June 19, 2020, 09:37:49 AM »
The Ford oil cooler adapters, with the exception of the 67- Shelby GT500 version, all have thermostatically controlled pressure relief valves.

I can't find reference to the service part number on them or the temperature they open at.

Anyone here know those numbers?

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