Hks Safr

yemgi · August 12, 2003

I'm thinking of buying a HKS SAFR, is it a good idea ? IS it better than Apex'i S-AFC II ?

I should be able to keep it when the car will be S/C.

I need your opinion! Thanks

yemgi · August 12, 2003

Too bad, it has already been sold

dlayen · August 12, 2003

what is it????

yemgi · August 12, 2003

http://www.tdi-plc.com/Technical%20SuperAFR.html

The HKS Super AFR is the very first airflow meter correctional device in the industry with a built in CPU. The advantage of having a built in CPU is that instead of making corrections to the airflow meter map signal voltage, the characteristics of the airflow meter map signal are input to the CPU so it can calculate the most accurate amount of airflow. Since the correction will be made to this specific intake volume, the ratio of fuel wil be precise and proportional. With an illuminated display and face mounted adjustment controls, the compact Super AFR is a simple to use fuel computer that offers many of the advanced features that were once exclusive to full engine management systems. The LED screen is utilized to digitally display all adjustments as they are entered along with RPM and fuel % adjustment (over baseline) in real time. The Super AFR is compatible with virtually any fuel injected 2 to 12 cylinder vehicle that utilizes a hotwire, Karmann Vortex airflow meter or pressure sensor. The internal CPU allows it to be versatile and utilized on many of the newer airflow meters.

The air/fuel Ratio Correction function of the Super AFR allows complete fuel curve tuning by offering eleven points between 650 and 8000rpm of adjustment, that can be arbitrarily moved in 50rpm increments. Each point of adjustment offers a tuning range of 50% rich to 50% lean from the factory baseline setting in 1% increments. Also incorporated is the Idle Correction function, where idle fuel mixture can be adjusted from 50% rich to 50% lean from from the factory baseline setting in 1% increments within the idle range of 650 to 1500 rpm. This offers the ability to adjust air/fuel ratios as modifications progress and require further tuning to compensate for high lift cams and/or larger injectors. The response function, similar to the one in the VPC, allows for adjustments to the fuel settings opon throttle input to improve driveability and performance. Much like the corrections made to the idle mixture to compensate for high lift cams and/or larger injectors, the response function can also compensate for differences in fuel requirements opon initial throttle input as airflow characteristics are changed from high-lift cams, larger injectors and bigger turbochargers. The response function allows for management of engine response in milliseconds with six points of air meter signal adjustment between 650 and 5000 rpm that can be randomly moved in 50 rpm increments. Additionally, an Electronic Idle Stabilizer function (EIDS), which buffers dramatic airflow meter signal fluctuations, prevents engine stalling or stumbling assciated with sudden imbalances in air/fuel ratio of airflow meter equipped vehicle that utilize atmosphere venting blow-off valves.

Warning: a lean air/fuel ratio can occur which may cause detonation or other severe engine damage. HKS strongly suggest consulting a trained technician before use of the AFR.

HK_Altezza · August 13, 2003

I have seen some guys with the Apexi SAFC. This one seems to be more popular. Some people goes with the Greddy eManage.

The new SAFCII has a lot of possible settings, but most of these settings are a secret , so basically you need to try to find these yourself. If you do well you get more power, if not, you will have signicantly less and you can damage your engine.

Alex

yemgi · August 13, 2003

I love Apex'i design but the S-AFC II tuning seems less effective than the HKS one as the settings can only be done by 200rpm tuning steps against 50rpm ones for the HKS.