Who has an intake of some kind - headers – and a catback, greddy, cattman, etc. and has installed and tuned an Apexi AFC unit? Can you honestly say it made a big improvement in performance and the way the car runs? I am trying to make a decision of whether it is worth the money. I have spent $1800 on exhaust mods in terms of price, shipping, tax, install and am pleased with the change but not as much as I thought I would be. \

Thanks

 

You will only gain anything if your air fuel mix requires adjustment. Get a dyno and then you'll know whether to get it or not. That being said, most people here with headers have needed a piggyback of some sort to adjust the AF and have gained some hp, tq, and mpg.

Search for other discussions on this, there are many of em out there.

 

http://www.forums.maxima.org/showthr...ight=apexi+afc

 

http://forums.maxima.org/showthread....ht=apexi+S-AFC

http://forums.maxima.org/showthread....ht=apexi+S-AFC

http://forums.maxima.org/showthread....ht=apexi+S-AFC

http://forums.maxima.org/showthread....ht=apexi+S-AFC

http://forums.maxima.org/showthread....ht=apexi+S-AFC

http://forums.maxima.org/showthread....ht=apexi+S-AFC

http://forums.maxima.org/showthread....ght=apexi+safc (thread started by 03maxima1)

http://forums.maxima.org/showthread....ght=apexi+safc (thread started by 03maxima1)

http://forums.maxima.org/showthread....ght=apexi+safc


I win....

 

Yeah, so, mine has the word "consolidate" in it. Less is more. Quality over quantity and so on and so forth, etc.

 

Big deal, I also read through those threads to check for relevance of content...

 

Two of them you posted were started by this thread starter!

 

Exactly...

 

Here comes the choo choo train!

 

I am not trying to start a long winded thread here or be repetitive. This question was to people who have similar mods and who have installed the AFC unit and tuned it. The threads I posted previously did not answer my question completely. So does anyone have any proof of gains after this modification?
Thanks

 

So then I take it what you meant was to ask was for before and after dynos from people who have used a piggyback to adjust AF and not for opinions.

 

Right, that is what I was looking for. Opinions really do not help with this mod. I was trying to find out if someone has some real results. I just don't think it would do a whole hell of lot w/out a turbo or S/Cer. Is that not what this is ideally made for. But if you can get some desent results for the 350 to 450 you spend then I would do it.

 

That's why I think your initial question should have made that more clear. Anyways, you can get a SAFC II or VAFC II for 200-250 on eBay, not sure where you're getting 350-450 from, unless you're including install + dyno costs. IMO, if you have headers, you should dyno regardless, so that shouldn't even be a consideration. People have gained around 10-12 whp from refining their AF, so I think for the money its worth it. That and you'll get rid of the car running rich and the low mpg.

 

Yes, I included install. I hear mixed responses with this addition on an N/A car so I was trying to get some input from someone who has done it. That was the point of the post. Thanks for trying though to help though.

 

Most people see between 8-12 whp.

Why don't you stop wasting our time... get a dyno w/ A/F, then decide if you need an afc or not.

 

Your right maybe I should. But you only waste your time if you comment.

 

Like I said in the second post, the only way for you to find out if YOU need to adjust your AF is to get a dyno w/ AF.

This has been posted many times before, definitely in most of the links I posted above: it will be different for everyone so some people may find getting a piggyback for their NA application worth it (and get some nice gains) because their AF is off, while others may not and don't have to get it at all.

YOU need to get on a dyno to know for sure and not go by what other people have done.

/thread