EGT #'s on throttle stop

[sg5985]

Interesting. The probe is about 2" down the pipe on #5. I've heard that being too close to the head can create a false reading but more likely to be high than low.
The plugs look ok, the cruise is very flat at 4400 and the 60's are pretty consistent but the car is very difficult to dial in changing conditions and humidity seems to really affect this setup. I've gone 180mph in good air bracket racing but only 170-172 on the stop. Timing @ 34'. 1050 carb with 91 main jets.
Appreciate the feedback

[sg5985]

Btw, while my handle is SG, this is data from my Worthy swingarm SC dragster

[Tom Goldman]

that kind of performance swing usually indicates a over rich tune up , plus a rich setup usually is very consistent on the cruise rpm.
Have you talked to Stinnett about it ?

[sst5167]

I too, run a Stinnett carb on both my super gas and super comp car. What jets do you have in it?

[sg5985]

I run primarily in 2000-4000 DA with 91 main jets

[gnicholson]

My stinnett carb runs around 11 to one on the stop about where it should be to keep it from hesitating when coming off the stop. The engine is throttled on the stop but still running on the main metering circuit and 3rd circuit. A throttled engine wants more timing than under load at wot . No power valve and leaving the timing the same at wot as on the stop will cause richer running on the stop but like I said it should be a little richer. Combustion Temps are going to be a lot lower on the stop but I don't have egt data

[sg5985]

I appreciate all of you sharing your wisdom. 91 doesn't seem like a lot of main jet but I guess its just too rich