I was wanting to know what kind of gain I would see by adding a fuel controler to a n/a. I have intake and exhaust. How hard are they to tune? Where is the best place to buy one. Is Apexi the best for my needs?

 

bump

 

It probably will only add *maybe* 10-15 hp on an n/a. Tuning you'd probably need a wideband to really get the best out of it. Buying one you might be able to find one used or go for the new s-afc 2..

 

ebay rules the world of safc's. check it out.

 

10-15 hp, hell ya. For tuning, what is a wideband? On the www.rx7store.net site they have two kinds of Fuel Controllers HKS afr and Apexi S-AFC II which is best?

 

A wideband is an O2 (oxygen) sensor that is used to tell if you are burning lean or rich. You adjust the AFC while looking at the O2 reading. Go to a good dyno shop and they should have one. BTW I think the Apexi unit is the best.

-Joe

 

Could I get a air/fuel ratio gauge in the car to do the same as the wideband? Will the dyno shop do the tuning for me or is it easy to tune the unit myself?

 

The shop can do it for you, or if you are experienced you can do it. You can also get a sensor and gauge and do it without the dyno, but I would only go that route if you plan on constant tweaking. Alot of people just set it and forget it.

-Joe

 

What the difference between the new one (**** with screen) and the blue screen with arrow buttons?

 

2 things Geoman84

#1 No reason to post this and then bump it 1 minute later. Please only bump if noone has answered and several days have gone by.

#2 Please only press the submit button once. 99% of the forum reposts and "problems" are caused by users (typically with less than 200 posts) pressing the submit button multiple times and clogging up the servers.

I deleted your other threads that you started on this subject.

 

I think the difference is the new one, S-AFC II can control fuel at eight points and the older one, S-AFC can only control 5 points. I think that is the difference, but there could be more things.

 

the s-afc old model is 8 points of adjustment at 500rpm gaps .. the new one is 12(s-afc II) at 250rpm