Dont have the money for a wideband and got a air/fuel gauge for cheap but dont know what O2 sensor to use so that when i do get a wideband i can us it for that to.

 

You can't do what you're asking. The narrow band gauge and sensor are all but worthless for any kind of tuning.

 

damn I just cant drop $300 on a wideband right now so a Air/fuel would be a waste of time?

 

you can get an AEM wideband on ebay for $250 shipped, it comes w/ everything you need including the sensor. i just finished installing mine a couple of hours ago and its quite fun watching it when driving around and beating on your car

 

Yes.

 

C.ludwig what widband would to suggest or do you happen to have a good used 1 around the shop?

 

IMO the best of the affordable sensors is Innovate. I've used PLX and NGKs new one and like the Innovate the best.

http://www.fordmuscle.com/archives/2...tout/index.php

 

The cheaper narrow band A/F meters are not worthless when tuning a carbureted N/A rotary for power. Since the N/A engine can tolerate a pretty wide A/F ratio, the cheaper meters can get a person close, especially if they have done a carb swap and are way off in venturi size and jet sizes. I have been able to tune my road race engine close enough with a cheap narrow band A/F meter that when I went to the dyno and used their wide band A/F meter, I was only one little jet size away from maximum power perfection. I do not tune for gas milege. Go to a parts store and ask them what their cheapest O2 sensor is.

 

You might want to consider Dual EGT as an alternative to WBO2. EGT not only gives you a good, linear indication of fuel mixture but also feedback on ignition timing. And having one probe per exhaust primary tells you the balance of combustion between rotors. This is not nearly as important on a non-turbo, but a good feature regardless. EGT is also more robust in the long-term if you take care to keep the wire insulation from melting and relieve the connections (good practice with any setup).