Sale ends todayGet 30% off any course (excluding packages)

Ends in --- --- ---

Alpha-N tuning for daily driving

General Tuning Discussion

Forum Posts



Tech Articles

Discuss all things tuning in this section. News, products, problems and results. 

= Resolved threads


Hi, this is actually my first time tuning an itb car for a daily driven street use car. I found that there is a lean spot when there is a huge increase of throttle opening. And at low load or cruise, the air fuel ratio will become very rich. Do i really need to use a map sensor to compensate for this problem?

The throttle increment for the table is 0,2,5,7,10,15,20,30,40,60,80,100

the ecu used for this application is link g4+ xtreme

I haven't tuned a car using Alpha-N, so I may be mistaken. However, can you not just use a throttle enrichment (tip in...etc) compensation map to add more fuel depending on the rate of change of your throttle opening?

Assuming it is an NA engine you shouldnt need a MAP sensor connected. For accel enrichment you typically need lots more sensitivity and a bit more clamp than a single throttle engine. I will post some example settings from one of the ITB engines that I work on (typically set your hold to the number of cylinders if running sequential, this example came from a 6 cyl engine).

I'm running a B20/vtec motor with ITB's as a daily with an ECU that's quite limiting. From what I have noticed is that at small openings the tps tip-in doesn't engage so I'm running at about 1.03 to 1.08 lambda with steady lambda at 1! What I noticed during my tuning period with this car is that if i targeted a little bit reacher mixtures .98-.96 all the hesitation that I have at lambda 1 goes away! I will say it again my ECU is limited and I can only adjust how much fuel to put in when the tps tip-in kicks in not when it will kick in.

Adam with this kind of small percentage on Accl. dead-band wouldn't give erratic use if the TPS fails or if there is a little bit of play between the TPS and the throttle actuator? I had a TPS failure before that's why I noticed that!

Just found out that link g4+ have an option called open loop lambda table for itb tuning. Already fitted a vacuum chamber and a map sensor. Set it up as Load = map , and fuel axis = tps , and the ecu will compensate the load fuel demand automatically. This is brilliant. And the car is running really smooth.

We usually reply within 12hrs (often sooner)

Need Help?

Need help choosing a course?

Experiencing website difficulties?

Or need to contact us for any other reason?