Standing still revving checking afr?

Jonas Nordstrom · Apr 24, 2022

Just wondering if I can get correct readings from my afr gauge when standing still revving the engine in the garage.
(Moving the throttle to 3k rpm and holding it there.)

I just want to be in the ball park before I go out driving.

Idle is set at 14.3 then when pushing the throttle holding it at 3k rpm the afr moves up to 18.

Demonic · Apr 24, 2022

Well, it give you an idea, but generally, it will be different under load at 3k.

Don Frelier · Apr 24, 2022

If it really is 18 when you drive it that would be quite high. very sluggish

dvw · Apr 24, 2022

No
Doug

Cranky · Apr 24, 2022

Jonas Nordstrom said:
Just wondering if I can get correct readings from my afr gauge when standing still revving the engine in the garage.
(Moving the throttle to 3k rpm and holding it there.)

I just want to be in the ball park before I go out driving.

Idle is set at 14.3 then when pushing the throttle holding it at 3k rpm the afr moves up to 18.

Things are always different under load and you don't want 18 while nailing it either. Kinda doubt you'd see that though since you'd have to be jetted way down to get that. Take it for a short ride and see what it reads. Jettng without an AFR gauge used to be the only way to do it in the 'old' days lol

Canadian1968 · Apr 24, 2022

NO you can't read it in the garage. Take it for a drive.

But I will say that if your getting 18:1 that is dangerously lean. I don't even know how you could Rev it at that AF. Does it even Rev smoothly ?

If anything it should be going rich. When I Rev mine I get blip to about 11:1 and then evens out when back to idle.

Out on the road it cruises at 14.5 @ 2600 rpm .

Standing still revving checking afr?

Jonas Nordstrom

Well-Known Member

Demonic

Well-Known Member

Don Frelier

FBBO Gold Member

dvw

FBBO Gold Member

Cranky

Banned Henchman #27

Canadian1968

Well-Known Member

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