My mods are Intake/Exhaust/NOS and now a Super AFC and let me tell you guys by leaning out my Air/Fuel mixture i gained about 10 HP at the wheels my Gtech says i dropped 7 tenths of a second on my 0-60 if u guys can get it, get it. its a great mod to have

 

Is it easy to use? install?
Shouldt AFC's only be used if ur boosted or using NOS or something??

 

he has NoS

 

oooops, i feel dumb now

 

Did you notice any gains without NOS? Did you try any G-tec runs without NOS? Is there any danger leaning out the fuel mixture this much? How much $$$ ? Do you need any gauges to go with this?

 

Yes at 900 or whatever feet im at and in 110 degree weather (phoenix) yes by leaning out the mixture 6% across the board i gained .7 seconds on my 0-60 time from stock fuel mixture thats without nos. I havent hit my nos yet because its really hot and i havent gotten a chance to refill my bottle but yes it was medium difficulty not very many tools needed and the coolest thing is that you can take it off and take it inside without it losing memory. Everyone i've spoke to including people that own 12-11 second daily drivers some boosted some NA say that if i lean out no more then 10% i should be fine but the best way to tune would be dynoing it but 7 tenths of a second in a 0-60 time is ALOT. just for a little piggy back fuel computer i do recommend it to anyone that can get it because its useful and it looks really cool. I have an Air/Fuel gauge right now there not very accurate im waiting for a EGT gauge those are alot more accurate. yes i would recommend at least a Air/Fuel gauge.

 

Please post dyno plots...

 

Did you dyno tune your SAFC?

The NA 10 hp gain at the wheel with the SAFC is going to be a hard sell without a dyno. Most NA maximas to date that have used the SAFC have seen minimal hp gains. A 10 hp gain from a SAFC is possible with nitrous, turbo, or supercharger. But for a NA maxima this is unheard of.

 

According to XS Engineering, the S-AFC should put at least 7 HP to the wheel NA. I'm going to have mine installed and tuned by them on Monday.

 

Any new developments?

I decided to pass onthe S-AFC for now. I'm trying to get my hands an EGT gauge for an affordable price first. Suckers cost more than I thought. The unit can be had for $290 through german-autowerks.com Installation looks just like a stereo...wire harness connects to the ECU. Tuning should be done by the pros only though. Every Maxima is different, especially with all the different mods everyone has. Dyno tuning is going to at least $200 I would think.

 

I just ordered a SAFC how hard is it to tune that thing? One thing I dont have much room to mess up or engine Kaboom since I am supercharged. Any input would help.

 

Installation is much like a car stereo...splicing the ecu wires. Tuning is a different story. I would think you'd want to dyno tune with the AFC. Every Maxima is different...especially with different mods. You'd probably benefit greatly by dyno tuning since it'll fine tune your engine at every point of the RPM. I know dyno tuning runs about $200 for 2 hours of tuning...$80 for the dyno service, and $60 an hour for tuning.

 

install instructions on my site..

http://www.seas.ucla.edu/~cheston/superafc.html

 

a little useless but interesting info... back about a year and a half ago, they (Sport Compact Car or Super Street, can't remember which) dynoed a turbo lude before and after tuning with an apex afc. they ended up getting around 40 bhp and about 60ish lb/ft of torque out of it. i know, it's a honda, and a turbo engine, but my god, it's also tuning. tuning can be a very good benefit on any engine congrats on the install, it's good to hear you got it working well!!

 

From reading previous posts, I thought that the ECU overrode the S-AFC's settings when trying to tune it. People have said that the ECU compensates for the changes thus it isn't useful performance wise for us (but my God is it so pretty )
Hey chebosto, how's the new Z feel? I went to see one at the dealer and I had a semiorgasmic experience.: Too bad it was sold... Oh and the $30G's are a little bit of a problem for me too.

 

Hmm...
I thought you weren't going to until next year...
I'm right behind you Jaime. How much did it run you & from where?

BTW, do you have a FP gauge?

 

Personally, I have yet to finish installing the wiring for mine, it is very difficult for me to manuver the wiring harness around to get at the right wires so I am going to try again this afternoon...the rpm and throttle position are the ones that are giving me the most trouble...threw a SES light the other day, gave up, swapped battery with Red Top and just left it unhooked except for the power, a/flow and grounds.

well I got the RPM correct but realized neither of the wires I am trying for the throttle are working correctly...I am not sure why but the color code does not register when connected on the S-AFC...

 

This is wrong, it works just fine.

 

Me too.

 

I ordered the SAFC from german techworks for 290 shipped. The website is up above these posts, see it? I am a Chevron VIP at the freaking gas pump since I really drive my car to work vice riding my bicycle and riding a boat in New Orleans. So this should help out just a bit and give me a couple of Ponies. I should also give you guys my HP on my car.

cheston thanks for your website instructions highly appreciate that.

 

ride your bicycle & a boat to work? Huh?!?!

 

 

for real I use to ride my nice mountain bike to work park it and catch a boat across the river and work was right there.

 

ROADBEEF
Is this who I think it is?!?!?!?!

 

There's no question about it. One look at his bad english and you can figure it out.

 

Bobby I had to order the SAFC it was 290.00 shipped, the guy at the Dyno said he knows how to work it and I dont know jack about DYNOs but all those computers will help out. He said they were very easy to adjust.

 

See if your Dyno guy has the EcuTek Delta Dash or similar. It will calculate your injector duty cycles. Since you're pushing 100psi fuel pressures on stock injectors, you're probably maxxing them out.


The AFC will not help you with fuel pressures, however, it will reduce your injector duty cycles by altering the MAF signal, making the ECU "think" that it is getting less air than it actually is.

While on the dyno, see if you can run stoichiometric with 6:1 disk (or 8:1 disk with a bleeder valve) on your 3.125 pulley. That should help you reducing the fuel pressures.