Flathead Running rich

[bmwillia]

Took a vacuum measurement. The gauge says its in the "Late Timing" range. How do I fix that?

Here is a video:

https://youtu.be/XcotyoNPuxI

Thanks!

 

[petehoovie]

 

[TerryOH]

Your engine seems to have a lot of valve lifter noise. IMO I would have Charlie Schwindler check out the fuel pump and get the pressure down and not install a pressure regulator. NAPA sells fuel filters for the glass bowl pump. Ask Charlie to install one. Remove the Carb input valve and clean. Then see if the Carb idle adj screws work and adjust the engine vacuum to the highest and most steady reading. Make sure you change the engine oil. A photo of the engine bay would be nice. You don't seem to have a vacuum leak which would result in a lean fuel mixture. You could remove the Carb top and see how much dirt is in the float bowl. If having the fuel pressure and the Carb input valve clean does not allow the idle mixture screws to adjust correctly then return the Carb to Max after calling him.

 

[bmwillia]

Thanks for the advice Terry! I really appreciate it!

 

[Tinker]

Another vacuum chart attached. When you get down to fine tuning best to do one change at a time then regroup. When you get there. New motor to you, it can be a lot of different things compounded. Understand why is important.

Vacuum is low, but that could be as described above.... What kind of cylinder compression are you getting. Keep at it!!!


I believe Charlie is a bit backlogged due to personal life issues. But I believe he also works on 97s. If you are sending him your fuel pump, maybe 2 birds as they say.

 

[bmwillia]

Is it better to check compression with the engine warm or does it matter?


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[Phil Gillespie]

Is it better to check compression with the engine warm or does it matter?

Normally checked when warm, ie around running temp. Then if low a bit of oil down the bore and a rechecked to rule out rings perhaps.
Phil NZ

 

[bmwillia]

Update:

I sent my fuel pump and carb off to Charlie and have received it back. He found a few issues with the carb and lowered the pump pressure from a little over 3lbs to 2.5lbs.

I have not had a chance to try them out yet because why they were away, I did a compression test on each cylinder and got a consistent 80lbs on every cylinder but #8, it was at 30lbs.

I pulled the intake and head on that side and it appears that the intake valve is not closing all the way. There was some carbon build up around the valve seat from it running rich. I have cleaned it and the valve is still not fully seating. Any ideas?

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[bmwillia]

Re: Flathead Running rich(UPDATE)

Hey guys, I wanted to post a quick update on the running rich issues I have been chasing down.

I believe my issue is resolved. Here is what I have done since my last post.

I changed the bent exhaust valve on cylinder #8 and put everything back together with my fuel pump at 2.5 lbs and the issues Charlie found with my carb straightened out.

I was still having backfiring issues on deceleration between gears so I turned my attention to the ignition system. All of the plug wires checked out good so I pulled the distributor and sent it off to Skip to have him go through it. Got it back last week and installed it this morning. My car has never run better!!! No more backfiring on deceleration and plenty of power while driving.

The car used to bog down when I floored the accelerator in 1st gear, now I have good power all the way though all of my gears.

A big thank you to all of you who helped me through this problem!!

 

[AKCJ]

Great to hear you’re running well. It’s gotta be a good feeling.