[N61WP]

Back when I was having this problem, I actually found and tried a Grose jet. Did not help, still couldn't handle more then about 3.5#. Grose jets were a family business and I think have since gone away.
Jc

 

[hrcollinsjr]

I found several references to them but no "real" information.

Thanks,
Harold

 

[jeff denton]

In studying this thread I keep seeing mention of the air/fuel ratio meter. I'd like to know all about these, what they do, how, why, where to get one.
Thanks!

 

[ConreroGT]

You can pick one up (AFR) at most "speed" shops with a sensor that welds into the exhaust via a bung (then sensor screws into bung). This way you can fine tune the air/fuel mixture more accurately...jets, mixture etc and get it right. Some gauges are handheld mount...get your adjustments then unscrew and plug the bung you welded in....or some are dash mounted full-time gauges. I've been looking at getting one myself.

 

[tomking]

I think JC Whitney sells the kit. comes with weld in bung and sensor, meter,

 

[RallyBob]

Keep in mind that unless you invest in a wideband O2 sensor/meter, the reaction time is wayyy too slow for a performance engine. I melted a sparkplug on a road racing course once...my Halmeter air/fuel sensor only showed the engine getting lean after the plug was melted.

A wideband meter will set you back about $350-$400.

 

[GTJIM (R.I.P.)]

A/F Ratio

The Air/Fuel Ratio meters use a sensor similar to the "O2" sensor used by Fuel Injection closed loop systems. The output is just sent to a meter instead of the FI ECU to give a read out on the rich/lean scale.
the Fuel Injection ones are used to keep the A/F Ratio at 14.7:1 but the in the car meter alows you to see the actual A/F Ratio under operating conditions and monitor jet changes etc. with a carburettor.
They are also very usefuel with FI systems that use Fuel Maps rather than closed loop (self-adjusting) ECUs.