I am considering buying a wideband for myself. I have the DIY kit but its not working right and I am tired of screwing around with it. Before I shell out the money I am wondering if the gains are worth it.
Say, for now I run it rich enough to missfire under high boost/load conditions, and gradually lean it out to the point where I don't get any more missfire. Now at this point I feel like my car is pulling hard all the way to the top. I am as rich as can be while still making good power. How much is there to gain from this point? I imagine there is still some room to play with but is it worth it, or am I at a good point right where I am?
Thanks,
Cliff

 

just find a local shop / guy with one. and stick it in for 30mins while you tune and pay em $50. no point spending $1000 for something you only use a few times.

 

The problem with that is for one, its not 50 bucks here. Its 150 per hour, plus I am always changing things on my car so I would like to be able to check my A/F afterwards. The last time I did a dyno tune session it was at XS Engineering and cost me 500 bucks and a days wages that I missed while my car was in the shop, so there is more than half the money right there. If there were such a place around here where I could use the dyno for 50 bucks, I can see your point, unfortunately that is just not the case.

 

Ive got a few japanese rx-7 magazines and in the states, people tend to say 12 to 1 is about as lean as you want to tune it. But it seems the Japanese tend to tune the cars for about 11.5 or 11.4 to 1. When I do get mine wideband tuned, I'm going to make sure to not go any higher than 11.5 to 1 since if thats what they shoot for over there, then I'm going to follow what they tune for rather than what is assumed to be okay over here.

Tim

 

BE carfull they have higher grade fuel in Japan. higher grade = less chance of knock