Foxy Green Foxbody Build

I have a really old timing light from Sears, works great. I bought another light from Horror Freight, it matches the Sears light. I don't use the dial-back lights, I know they can be an issue with multiple spark ignition systems, besides, all my engines have ATI balancers which are degreed 360* so no need for that type of light.
 
Mike Beck said:
I have a really old timing light from Sears, works great. I bought another light from Horror Freight, it matches the Sears light. I don't use the dial-back lights, I know they can be an issue with multiple spark ignition systems, besides, all my engines have ATI balancers which are degreed 360* so no need for that type of light.
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The sole reason I bought it was the digital rpm display so I could fiddle under hood
 
Here's the tests

Plugged vacuum advance and spun that distributor up to see when vacuum dropped off.
At 20 degrees, 800rpm, 9" vac
At 30 degrees, 900rpm, it was 9-10" vac
At 44 degrees it was 13-14" vac but 1200rpm, and 11-12" at 900rpm
I stopped turning it at that point because I didn't know wtf.

With 28 initial I hooked up vac advance and it jumped to 38 degrees 10" vac.

Car was good and hot. I turned the car off. Waited 5 minutes. Fired up no kickback.

I put 10 miles on her today. It drives better, nowhere near perfect. I don't go much past 1/2 throttle, maybe 3/4 one time but not past 5200.

It still has a lean spot in there at light throttle trying to hold mph on level ground. It sounds fluttery, like I'd compare it to jake brakes. More throttle it goes away but picks up mph so I can't really steady cruise the way it is.

I may run these tests again with vac advance disconnected to see if light throttle doesn't sound/ feel strange
 
Did you get a chance to try the carb changes ATM suggested?
 
hq308 said:
Did you get a chance to try the carb changes ATM suggested?
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Yes i should have mentioned i did that before driving. still lean at light throttle.

First thing I think I'm going to run timed vacuum instead of manifold. If no better I'll open rear air bleeds up to .078 instead of .075. Should allow me to put more fuel into idle circuit to maintain afr so the transition slots have more available when I get on the throttle
 
89 Fox 427 said:
Yes i should have mentioned i did that before driving. still lean at light throttle.

First thing I think I'm going to run timed vacuum instead of manifold. If no better I'll open rear air bleeds up to .078 instead of .075. Should allow me to put more fuel into idle circuit to maintain afr so the transition slots have more available when I get on the throttle
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Now that you're building all of this awesome knowledge, you're going to offer someone new your advice based on experience. And they're going to ignore it or do something else.
Are you mentally prepared for this LOL

I'm kidding because you're doing awesome 👍
 
If you decide to try locking the distributor out for testing purposes, and don't want to go through the trouble of fucking with yours, let me know. I have no problem sending you mine for testing.
 
Torque Command said:
Now that you're building all of this awesome knowledge, you're going to offer someone new your advice based on experience. And they're going to ignore it or do something else.
Are you mentally prepared for this LOL

I'm kidding because you're doing awesome 👍
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Actually....

There's a 14 year old kid that heard my car fire up the other day and his mom (will get pics.. I can guarantee that 🤣🤣) brings him by and asks if he can hang out with me because he likes to learn this stuff

I had him holding the timing light yesterday and writing down the numbers I was calling out.

He was in the passenger seat for the drives yesterday
 
89 Fox 427 said:
Actually....

There's a 14 year old kid that heard my car fire up the other day and his mom (will get pics.. I can guarantee that 🤣🤣) brings him by and asks if he can hang out with me because he likes to learn this stuff

I had him holding the timing light yesterday and writing down the numbers I was calling out.

He was in the passenger seat for the drives yesterday
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And it begins................. Kid doesn't know what he's getting himself into. Good for mom! :)

Hey, now that we are done with Iran (I think) maybe silver and gold will start to surge again. If silver gets to $200 an ounce, and I expect it will before year end, I know someone that can sell some stuff and convert to EFI............... ;)
 
Mike Beck said:
And it begins................. Kid doesn't know what he's getting himself into. Good for mom! :)

Hey, now that we are done with Iran (I think) maybe silver and gold will start to surge again. If silver gets to $200 an ounce, and I expect it will before year end, I know someone that can sell some stuff and convert to EFI............... ;)
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We're done with Iran about as much as Patriot is done trying to go faster
 
I typically keep the vacuum advance disconnected until the base timing and carb are sorted out.
It adds another variable that you don't need to deal with during initial tuning.

Set the timing a bit conservative and leave it alone until you get the carb right, and the car drives well.
Then bump in a little timing, tweak the carb a little if necessary, rinse and repeat until it's set on kill and then play with the vacuum advance.
Also don't make all your calls based on your AFR gauge, it's a tool but should not be treated as gospel.

Confucius say: Listen to your engine as it has much to say.
 
Fox sounds like your learning that a good thing and your making headway on the car no glider in the oil no clicking or clacking its looking up for you .
And above all you just might have inspired a future hot rodder.
I hope with all the talk I didn't jinks you
 
89 Fox 427 said:
Actually....

There's a 14 year old kid that heard my car fire up the other day and his mom (will get pics.. I can guarantee that 🤣🤣) brings him by and asks if he can hang out with me because he likes to learn this stuff

I had him holding the timing light yesterday and writing down the numbers I was calling out.

He was in the passenger seat for the drives yesterday
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I'm certain that you will make a great step dad.
 
ResurrectionJoe said:
I typically keep the vacuum advance disconnected until the base timing and carb are sorted out.
It adds another variable that you don't need to deal with during initial tuning.

Set the timing a bit conservative and leave it alone until you get the carb right, and the car drives well.
Then bump in a little timing, tweak the carb a little if necessary, rinse and repeat until it's set on kill and then play with the vacuum advance.
Also don't make all your calls based on your AFR gauge, it's a tool but should not be treated as gospel.

Confucius say: Listen to your engine as it has much to say.
Click to expand...

My gauge is verifying what I'm hearing and feeling. So far no one can easily explain it.

Drove it to the barbershop this morning in traffic. Timed vacuum seemed to keep a steadier a/f ratio throughout gear changes. Still a lean spot trying to cruise.

I may open up the rear air bleeds a bit as per ATM carburetors and readjust mixture screws. Sounds backwards, but the theory is if I can add more fuel into the idle circuit overall with the mixture screws, it'll be readily available when I get on the throttle. They think the idle circuit is dry
 
Your
89 Fox 427 said:
My gauge is verifying what I'm hearing and feeling. So far no one can easily explain it.

Drove it to the barbershop this morning in traffic. Timed vacuum seemed to keep a steadier a/f ratio throughout gear changes. Still a lean spot trying to cruise.

I may open up the rear air bleeds a bit as per ATM carburetors and readjust mixture screws. Sounds backwards, but the theory is if I can add more fuel into the idle circuit overall with the mixture screws, it'll be readily available when I get on the throttle. They think the idle circuit is dry
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Your on track in doing what your thinking .
Some times for the throttle response you need to fatten the idle up it takes care of the transition from closed to slightly open .
As for your AFR at cruise its normal to do that .
My dad was a milage mizer he had vacume gage on all the older cars just by watching the vacume you knew if the car was under load less load equaled better mileage leaner mixture
 
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