Recommended starting point for jetting on Thermoquad

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Bewy said:
It looks just like a model I reworked recently, #9150, had that odd vent/crap at the rear. I had to block off a few passages etc, but other than that it should work as well as any other TQ. What is the # stamped on the mounting foot?

I would check/do two things before installing it:
- check the sec high speed air bleeds & enlarge if not already 0.039-0.040"
- enlarge the sec jets to 0.143".

Depending on cam duration, IFR may need enlarging & more bypass air. Do NOT drill the pri blades for bypass air, it encourages nozzle drip; drill the sec blades.
If the air valve dashpot is old, it may be slow to release & is worth a few $$$ to replace it & save some odd tuning problems down the track [ pardon the pun ].

You are in Fl, similar mild climate where I live. I have never needed a choke with a TQ, so for more air flow, I remove ALL the choke mech as well as the bar that runs across the top of the AV. This leaves a small hole in the AV from the linkage & I braze a thin plate over it. May not be needed, haven't tried it without it.
Click to expand...

Hey Bewy, is this picture hood for what you were saying?
Let me know via a PM. I’m pretty much done with this fool & how he posted this thread right now. I don’t think I can take another idiotic comment or an aloof type of response for someone who posts a million dumb *** threads and acts an *** on purpose. I’m not even reading this his dickheads response to me. I’m ducking done. Just trying to be honest here. I’m not angry or mad, just saddened but a moronic Imbecilic attitude from someone who’s thinks it’s funny I do such things.

Im moving onto those actually looking for help and have more than 15% of there brain power working while seeking help.

If you need or desire another picture, PM me and we will hook up on this TQ stuff.

75D90BF1-B390-4069-817C-244E6A16453D.jpeg
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Rumble,
Tried to PM, didn't work. Probably me doing something wrong. Yep, the top pic shows the underside of the sec high speed air bleed. Where that comes through the top of the air horn it necks down, pinched [ like the IFR tube ]. That pinch should be opened to 040 if it is not already 039-040.
 
I’ve never taken one down that far as to drill there. Remove the brass tube?
 
Thanks. I’ve not been done this road before.
 
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