how to make IAB via VTEC obd1 ecu HONDA
need:
resistor 5w 33omh (ceramic)
diod
transistor IRF9630 p channel

advantage of this scheme over the relay circuit - there is no electromagnetic interference that kill datalog when you switch VTEC

developer - Gek




A4 - VTEC output
А25 - +12v


thanks to GEK, SHURIK+, me and ALL

stick to faq

 

What are you referring to as IAB? Only time I've seen this acronym used in relation to Honda/Acura, is for the Intake Air Bypass found in the GSR Intake Manifold

 

yes, this is for chipped p06/p28 ecus ect to add the control for the secondary butterfly's for gsr and h22 intake manifolds


i am not good at reading schematics. seems pretty simple. but if you can, can you snap some pictures

 

There is a step by step on PGM-FI for adding the IAB circuit components on to certain P06, P28 and P75 OBD1 ECU main boards. Depending on the board version, there are a few that have the circuit, they just need a few components added in order to enable them.

I think the above posted diagram is for controlling IAB's via tapping into the VTEC circuit. Instead of actually having a separate IAB circuit. Therefore they would engage at VTEC crossover.

 

gotcha

 

Man Ghost, I miss trolling the Accord threads simply because of your posts. I always learn something.

 

Thanks! I'm more than happy to pass along any info that I can.

 

Thing is, it's never information I'm necessarily looking for but it always makes for a good addition to the knowledge bank.

 

and have sex with P72 ECU rom

 

Pretty sure that the parts list on pgmfi is only for the 11F0 version ecu and incomplete unless its the 11F0 p28 ecu.

I hooked IAB w/ vtec before. Great results

 

dont forget the p13s an p61s