More Tuning Questions...

[Anonymous]

I have rebuilt the Autolite 1100 and set the float and set the mix and idle screws. The car idles PERFECTLY and runs at higher RPM SMOOTHLY. There is no smoke at idle nor at higher RPM.

According to factory specs and my timing gun, the engine should be properly timed.

However...

During acceleration, it still puts out some black smoke (rich) with the following:

1) sounds like sputtering

2) loss of power until I take my foot off the accelerator and then re-accelerate at which time the little 200 comes alive and takes off like nobodys buiness.


I have read elsewhere on this forum that an improper set advance could have the same symptoms as a rich running carb.

My '68 engine is all stock with the 1100 1V and a stock Autolite Distributor with points and dual advance (vacc/centerf.)

Any thoughts?

 

[CZLN6]

Howdy MontegoMan:

More info would be helpful. Like does it do this cold? Warm? Or both?

What is the initial advance set at?

With the info you've given, I'd be suspicous or a weak accelerator pump, lean idle air screw, or needing more initial advance- or some combination of all three.

It the engine is worn and tired, and it does it after high vacuum, the black smoke could be oil from worn valve stem seal or rings.

How many turns out is the low speed air screw?

Adios, David

 

[Anonymous]

Hi David!

The intial timing is set at 10 BTDC; factory setting is 6 according to my shop manual.

It does this cold and at operating temperature.

I have to check on the idle screw...but it idles smooth and around 650/700RPM.