17 replies to this topic

[babsbrown]

I’ve got a fairly highly tuned 1100 and currently have a HIF44

Idle is around 14.0 and should be fairly stable, and should come back to the same reading after revving and driving
Cruising is around 13.5 to 14.5
When go from cruising to full throttle it drops down to 12.5 and stays there until you ease up on the pedal
Coasting in gear with the throttle closed it goes 15.0 to 20.0 which is perfectly fine

You want it to be at full operating temp before you fine tune it, otherwise it’ll change when you drive

Hi timmy,

Just another quick question, does your afr drop rich immediately after you take your foot off the gas momentarily? I read this is sort of expected but I'm not sure why. Perhaps the SU carb design.

[Kevybmini]

Rolling road tune - save ruining your new engine 

[ACDodd]

Rolling road tuning is very good if the operator actually knows what they are doing, the trouble is nowadays that’s often not the case.

Ac