TBoost

There is some new product called the HKS Super AFR. Check it out here:

http://www.hks-power.com/superafr/

I want to know if this will allow me to extend my fuel cut off on my RX7 (without using the FCD). So for example, instead of the fuel being cut at 7psi, the Super AFR acts like the FCD in that it extends the cutoff to 10psi.

Thanks,

-M

Chris Ng

#1 It only corrects fueling, it does not eliminate fuel cut

#2 It can not be used with stock FC's since it does not support flapper type airflow meters..

13BAce

The HKS super AFR lets you modify the injector pulsewidth at various RPM's. It's just like the Apex super AFC. Aren't you running a Haltech E6K now? There won't be any fuel cut if you're not using the stock ECU.

TBoost

Actually I'm asking this question because of the ProbeGT I have. There is no other computer that will eliminate fuel cut except getting the ROMs modified on the ECU.

Some guy mentioned this as an alternative. Though it won't eliminate fuel cut, I do think it will delay fuel cut which would be what I want. If I am able to delay fuel cut from 12psi to 15psi, then I'm in business..

Let me know.

-M

TBoost

That's why I said "delay" fuel cut.

Where does it mentioned that it doesn't support flapper type airflow meters? It doesn't hook into the AF meter but the computer, so it should be compatible with any AF metering device.

-M

13BAce

Have you tried contacting HKS about it? I don't think many people have experience with the AFR because it's so new.

TBoost

Yea, I"ll give them a call today and see what's up.

-M

Chris Ng

Direct quote from the web site you provided the link to:

"The Super AFR is compatible with virtually any fuel-injected Import or Domestic, 12Volt, 2-12cylinder vehicle that utilizes a hot wire, Karmen Vortex, or pressure sensor. The internal CPU allows it to be versatile and be utilized on many of the newer type airflow meters. Also incorporated in the Super AFR is the ability of idle air/fuel ratio corrections as modification progress and require further specific tuning levels. The response function, similar to the one in the VPC, allows for adjustments to the fuel settings upon throttle inputs to improve driveability and performance."

Notice it states hotwire, karmen, vortex or pressure sensor .. it does NOT mention flapper .. I don't belive this is just an ommision by HKS by mistake.. but hey, if you want to try it out then go right ahead...By the way, if you do take some more time to look at the site a little more closely, you'll notice a link marked "schematics" and you will notice that it does in fact tie into your AFM.. The only reason it ties into your ECU (Like the s-afc) is that it's a convenient place to splice into power and afm signals from...

I'm curious as to how you belive the unit will delay or eliminate fuel cut..fuel cut is built into the factory ECU.. the HKS unit is really no diffrent from an apexi s-afc, except it has a little cpu in it that helps with calculations to play with the afm signals it sends to the ecu.. Your first tip off should be the fact that it mentions nothing about fuel cut on the website.. while this may or maynot mean that it plays around with the ecu to elminate or "delay", I woudl be surprised that they would forget this feature...


shrug.. your choice what you want to belive

supergoat

I assume you have a 1st Gen Probe GT. go to www.probetalk.com and go to the 1st gen performance section. There are many people running 12+psi without any computer modifications. There is a very easy mod that tricks the computer into thinking you are still just running the stock 7psi(I thinknit's 7) when in reality you may be running 12-15.

Good luck.

TBoost

You are correct. I just got off the phone with HKS and it will not do anything but adjust the AFR.

My reasoning was that I thought that it also controlled how much the AFM sees as far as air input. Lowering the air input setting at 12psi so that the computer "sees" 10psi was my assumption.

Oh well...scratch that idea.

-M

TBoost

Yea, I visit that web page all the time. They are using some form of fuel cut to do it or delay the fuel cut with moding the MAF (which I don't care to do). Most of them use the modified chip that overrides the computer settings.

-M