What's better for the JDM H22A motor, Hondata S300 with P28 or P72 ECU? I know that P28 doesnt have Knock or IAB, while P72 has both

 

its all the same thing once its tuned.

 

Tuning is the same so save the money and get the P28 instead. You can add the circuitry to support IAB if needed. The knock function on the P72 is overrated and can potentially cause hesitation problems, which you will probably end up disabling anyway.

 

Without the IAB, the engine will lose approximately 8 horses from 3k-5k rpm. So, tuning with a P72 will disable both IAB and Knock right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oneprelude &raquo;</TD></TR><TR><TD CLASS="quote">Without the IAB, the engine will lose approximately 8 horses from 3k-5k rpm. So, tuning with a P72 will disable both IAB and Knock right?</TD></TR></TABLE>

No, the p28 will disable both of them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oneprelude &raquo;</TD></TR><TR><TD CLASS="quote">Without the IAB, the engine will lose approximately 8 horses from 3k-5k rpm. So, tuning with a P72 will disable both IAB and Knock right?</TD></TR></TABLE>

ive never noticed losses....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">

ive never noticed losses....</TD></TR></TABLE>

That's because you've only tuned 2 cars, lol.

 

just take the iab plate out completely and retune, problem solved

***.

 

Hey Blake, I have a completely gutted IAB plate sitting around. What is the best way to close up all the holes between the runners? I was wanting to try it out on my H22 just to see if it runs any better without them.

 

take the plate out completely and bolt the plenum back down after removing the studs.

 

I would either JB Weld the holes then grind them nice and flat, or spend the money on the Blacktrax spacer. Your choice. P.S. with CORRECT tuning, you can almost eliminate any power loss from removing the IABs.

 

yeah I was not gonna do it until I can get someone to tune it for me. I was thinking JB weld would be OK for the holes in between the runners. Blake how much is typically gained from removing the IABs? My motor is stock H22A with MSD SCI ignition and wires.

 

i havent tested it, however, jdogg and jeff evans have accounted for ~5whp across the operating range.

 

What is the operating range? 2krpm - 7krpm?
How much do you charge for a basic tune Blake? I will probably get Neptune because I have yet to hear anything negative about it.