AFR on the Throttle Stop

eman588G · 06-12-2017, 08:35 PM

The cruise rpm and the 02 appear to be around the same on each run. This was the first race with the racepak and the 02 so I don't really have a ton of data. In the past, it sounded like the motor wasn't running clean when it first went on the stop. Raised the stop rpm and it sounds better.

Just want to eliminate any possible inconsistencies, with the tuneup.

Will look for that power valve thread.

sst7250 · 06-29-2017, 02:41 PM

AS pointed out don't get to caught up in chasing an "ideal" number there. You need to find what works for your combo and what makes it repeatable. Having said that there are things you can do to change stop AFR's. Depends on what stop and what carb as to what you will need to do.

06-12-2017, 08:35 PM	#1
eman588G Junior Member Join Date: Jun 2017 Posts: 2 Likes: 0 Liked 0 Times in 0 Posts	Re: AFR on the Throttle Stop The cruise rpm and the 02 appear to be around the same on each run. This was the first race with the racepak and the 02 so I don't really have a ton of data. In the past, it sounded like the motor wasn't running clean when it first went on the stop. Raised the stop rpm and it sounds better. Just want to eliminate any possible inconsistencies, with the tuneup. Will look for that power valve thread.

06-29-2017, 02:41 PM	#2
sst7250 Member Join Date: Jan 2009 Location: Las Vegas, NV Posts: 184 Likes: 9 Liked 45 Times in 32 Posts	Re: AFR on the Throttle Stop AS pointed out don't get to caught up in chasing an "ideal" number there. You need to find what works for your combo and what makes it repeatable. Having said that there are things you can do to change stop AFR's. Depends on what stop and what carb as to what you will need to do.