Ignition: Tuning, timing and carburation

[mmagic]

Although I've always understood the basic objectives of adjusting a carburetor or setting the timing I've always been a hacker and bumbler when it came to actual application of the principles. There was no reason to expect that my outcomes were close to optimum.... in fact I was usually just happy if the engine actually ran!

Faced with front range emissions tests at 5,000 foot altitude on the Champ I found this read, applied it and it almost took the fun out of the process. Not yet a pro but no longer intimidated by the process.

While the first read explains vacuum as a powerful tool in tuning an engine, the second read goes further into explanation of the role of vacuum at RPM above idle.

http://classicinlines.com/vacuum.asp

http://www.losboulevardosmessageboar...l=1#post137372

[Mike Van Veghten]

The first writeup isn't bad, simple and to the point. The second one (68rocket) is full of holes and not so accurate comments. Granted, I only read about half of it, that was enough to say fine, he has his thoughts...but..

Mike

[sweetolbob]

I've given up trying to be a carb tuner to the stars with the older methods. When I get jiggy with the 383 SBC in my 74 Avanti, I'm tuning it with this.



For $155 I'm tired of being 1/2 right.

Bob

[52-fan]

Will that thing work with a stock Studebaker if you add an O2 bung to the exhaust?

[PlainBrownR2]

If everything is wired correctly, it shouldn't have any issues with a Studebaker engine. I have an Innovate wideband O2 setup affixed to one of my turbo outlets in the '55. The only extra wiring that I had to do was the unrelated wiring from my Megasquirt ECU to O2 wideband controller. If the extra wiring is not used, it's just used as a standalone unit, or as a sensor and gauge combination. The wideband's "brains" are located in the probe that goes into the exhaust, and the results of the voltage signal are sent to the gauge.

[sweetolbob]

Will that thing work with a stock Studebaker if you add an O2 bung to the exhaust?

I would think the only issue would be 12 volts, the unit has no idea what it's in.

Bob