weber problem pics attached

[Scott R]

A little help if someone could. I thought I may have had an ignition issue, well maybe I still do. At any rate I had the distributor rebuilt and re-curved last week, it all checks out on the machine. Plug wires are new, I replaced the old green wire which was falling apart as well.

Problem is still here, idle is perfect, but the car has no power and the transition is more like a stalling condition. Fuel is shooting out of the velocity stacks and with the air cleaners off the car produces fire balls from the stacks. You can see the amount of fuel here:



I went ahead and started another tear down, please someone tell me if everything looks alright. BTW floats are set using the PMO tool.




Should the accelerator pump arm have a slight pre-load? Mine does.



Throttle shafts are tight.


This is me shining a high powered light through the main circuit, it's perfectly clear.




A few more notes, the ignition is an MSD 6AL and MSD coil. Jetting is as follows:

180 Air Correction
150 Mains
55 Idles
4.5 tubes
30 chokes
.75 mil on accelerator pumps.

Anyone have any ideas?

[matt demaria]

Make sure auxiliary venturies are not upside down and the hole inside is aligned to the emulion tube.

[Scott R]

Originally Posted by matt demaria

Make sure auxiliary venturies are not upside down and the hole inside is aligned to the emulion tube.

They are installed "numbers up" and aligned, on my webers they seem to fit only one way.

[Steve@Rennsport]

Originally Posted by Scott R

They are installed "numbers up" and aligned, on my webers they seem to fit only one way.

The aux venturies have their feed holes at one end, only. If they get installed backwards, the cylinder gets little or no fuel so its worth checking each one.

I'm assuming that that you had 3.5 psi of regulated fuel pressure when you set the float levels,......

[JP911]

Possible that when you reinstalled the distributor you were off by a tooth?

[Scott R]

Originally Posted by Steve@Rennsport

The aux venturies have their feed holes at one end, only. If they get installed backwards, the cylinder gets little or no fuel so its worth checking each one.

I'm assuming that that you had 3.5 psi of regulated fuel pressure when you set the float levels,......

It's closer to 3 on the PMO gauge , but I'm going to run down to the garage again and check them. More pics in a min.

[Scott R]

Ok, passenger side bank of floats were a bit high, I leveled them.



Accelerator pump volumes checked, this is a 1ML vile and the reading is under the 7 mark. (picture sucks I know, hard thing to photograph)





Same problem, perfect idle, I could put a wine glass on the fan shroud. But when I go WOT I get brown smoke, bucking and I have no power at all.

[Scott R]

ok, small update. Massively advancing the timing makes it work a lot better. I was told I have 28 deg of total mechanical advance at 4500 RMP's so what the heck is going on here?

[Steve@Rennsport]

OK,.....Precisely, how much total advance do you currently have at 6K?????

[Scott R]

Originally Posted by Steve@Rennsport

OK,.....Precisely, how much total advance do you currently have at 6K?????

I'll measure it and post back. My guess it not enough. You re-curve distributors correct? I may need to PM you.

[Steve@Rennsport]

Originally Posted by Scott R

I'll measure it and post back. My guess it not enough. You re-curve distributors correct? I may need to PM you.

Excellent. I need to know exactly how much total timing you have.

Just send me an e-mail,....

[Scott R]

Originally Posted by Steve@Rennsport

Excellent. I need to know exactly how much total timing you have.

Just send me an e-mail,....

Will do, thank you.