27-03-21, 04:07 PM
A quick update!
I treated myself to a Morgan CarbTune Pro ... and I will have to say that I wish I had brought one before!! Much superior to my electronic one (TwinMax) which only does two pots at a time. Seeing how all four were behaving simultaneously is much easier.
One thing I did note is that the CarbTune supplies very small bore plastic tube that you use as a damper in the rubber hose (located at the manifold end). I tried the CarbTune with and without the dampers and it makes a very big difference to the stability of the reading. In hindsight, I should have done that in times past when using the TwinMax, I am sure it would improve have improved the accuracy when making adjustment. Kicking myself really as the concept is not new to me, having worked in instrumentation for the past 30 odd yrs and at times in automotive engine testing! Doh! :\
I will next time make a comparative test between the two instruments as I will be able to use the same damped tubing arrangement.
Mike,
I checked the pilot screws, all at 4 & 1/4 turns out. I have now set them 4 turns out.
I set the TPS sensor to read 0.7v, which is mid-range of the stated 0.65 to 0.75v DC in the Haynes manual.
It does seems to sound a bit sharper and responds nicely when I blip the throttle. Test run tomorrow so I will update after that.
Bw
I treated myself to a Morgan CarbTune Pro ... and I will have to say that I wish I had brought one before!! Much superior to my electronic one (TwinMax) which only does two pots at a time. Seeing how all four were behaving simultaneously is much easier.
One thing I did note is that the CarbTune supplies very small bore plastic tube that you use as a damper in the rubber hose (located at the manifold end). I tried the CarbTune with and without the dampers and it makes a very big difference to the stability of the reading. In hindsight, I should have done that in times past when using the TwinMax, I am sure it would improve have improved the accuracy when making adjustment. Kicking myself really as the concept is not new to me, having worked in instrumentation for the past 30 odd yrs and at times in automotive engine testing! Doh! :\
I will next time make a comparative test between the two instruments as I will be able to use the same damped tubing arrangement.
Mike,
I checked the pilot screws, all at 4 & 1/4 turns out. I have now set them 4 turns out.
I set the TPS sensor to read 0.7v, which is mid-range of the stated 0.65 to 0.75v DC in the Haynes manual.
It does seems to sound a bit sharper and responds nicely when I blip the throttle. Test run tomorrow so I will update after that.
Bw