Trade off required? Stroms cd 150

[Acollin]

As the forum knows, I have been playing a lot with my stromberg cb150s on my series v.
The trade off seems to be either (1) a little bit of dieseling and great performance or (2) no dieseling and a slight hesitation at times. Non-ethanol fuel only.
Questions:
1) Have I gone as far as I can go with adjustments— jets/idle settings/ timing?
2) Is one condition better for the car than the other?
3) are there other things for me to consider? Aside: I want the carbs I have and not a weber.
Thanks all — I appreciate any and all comments/ suggestions.

 

[puff4]

Dieseling is a bad thing. That means the air/fuel mix is pre-igniting and this can do damage to your engine long-term. Go with the hesitation and put heavier oil in the dashpot.

 

[hartmandm]

When do you experience hesitation?
Still using 5M metering needles?
Still using original Lucas 25D4 distributor with old advance curve?

 

[Acollin]

Hesitation occurs after gear change acceleration
5M needles-yes
original distributer yes
I have been using 20 wt or atf as dashpot oil. I did have better acceleration when I used engine oil 20/50. I will give it a try.
Thanks all

 

[puff4]

Hesitation occurs after gear change acceleration
5M needles-yes
original distributer yes
I have been using 20 wt or atf as dashpot oil. I did have better acceleration when I used engine oil 20/50. I will give it a try.
Thanks all

Yeah, that dashpot, as I've explained here before, is your accelerator pump. The heaver the oil, the more 'pump' you get. Never use lightweight oil in it - Rootes recommended engine oil, but if you want even more 'squirt' you could use even heavier oil.

 

[Acollin]

Great suggestion, Puff4.
while at this point —I have only had two “stop and restarts”— the different oil has made a significant change.
i siphoned out the atf and poured in 30 wt non- detergent. I use this in my BGT overdrive gearbox. No hesitation on acceleration and no dieseling. I will not deem it resolved just yet, but I am definitely well on my way.
aside:
I will stick with the 30wt for now, but a friend said he heard of people using 80/90wt in dashpots.
be well all
a beautiful day in the pacific northwest today— heading out for a drive
Andrew