I just want to make sure I'm correct. My plans are to get a hondata 2b w/ boost functionality in the near future. From my research on hondata.com, my 2001 GSR will need an OBD I P72 ECU swap in order to use hondata. Is that right? I could not find this info in a search, so I just would like to confirm...TIA.

Justin

 

yes, it needs an obd1 p72. i have a 2001 gsr, i needed the obd1p72 and a jumper cable.(available from hondata)

 

Thx, I'm assuming the "jumper cable" is the adapter cable on their site, no?

Justin

 

yes, adapter cable = OBD2 to OBD1 cable (for using a obd1 ecu for obd2 cars equipped with an OBD2 ecu)

 

You do not necessarily need a P72. The P28 will work, so will a P30. The P72 has a knock sensor not meant for use with a turbo and especially not with forged pistons. I know Hondata ran a type R with a P28. Your expense for an OBDI P72 computer will be $300 plus, IF you can find one.

 

Get a P28 and an RPM switch for the IAB. Much cheaper.

If you really want knock control, get a J&S, it works much better.

 

What do you mean get an RPM switch for the IAB, sorry I'm a little confused about the different ecu's. I have a 01 GSR also and am ordering the Drag III very and hopefully Hondata 2b w/ boost but I need to figure out this ecu stuff first!!

 

ok, I think the IAB controls the secondary intake runners right? How could I use a switch to do this? Also w/ a Drag III running 9psi would see much gain from running an ITR or another intake manifold then this way I wouldn't need the IAB control?

 

Yes IAB = secondary intake runners
You can wire an RPM switch to activate them.
I tend to like the skunk manifold over the gsr though and yes then you wouldnt
even need the IAB control.

 

This is good news. Sounds as if the p28, rpm switch for iab, and seperate unit for knock sensor is the better way to go? What is the typical price for a p28 ecu? Thanks for the help.

Justin

 

typical price is around 100-150. I sell them for 200 prepped for the hondata.

 

So I'm looking at $750 + shipping for a 2b and the ecu? What would I do with my old ecu, store it up? And the rpm switch for iab, is that something you can get a hold of too? Sorry for all the q's, but a lot more questions came up from the other replies

Justin

 

What do you mean prepped for hondata?

Acutally you will need the wiring harness to convert from obd1 obd2. Skunk makes one for around 250 and hondata sell them for 250 as well.

 

I assume you have a post 95 car which is why you need the ecu.
In which case you will also need the ecu adapter(250).

The switch can be had from Summit racing.
MSD makes it

 

Yes it's a 2001. Man I didn't think that adapter cable was so expensive Oh well...anyways, I think I have things right now:

p28 ecu = $200 hondata ready
adapter cable = $200
hondata 2b = $550 (or whatever price is when I buy)
rpm switch for iab or skunk2 manifold
...something for knock control...

Thanks for all the help.

Justin

 

What do you mean prepped for hondata? I dont' really understand how this works? Thanks again!!

 

I got a P72 for my setup. Will the knock hurt the performance alot, even if the car is tuned? I know it would help save your engine if it is not or if something went wrong.

BTW. A hondata prepped ecu is one that is socketed and has the resistors soldered in.

 

The stock knock sensor is useless. It retards timing below 5k rpm in the case you put 87octane in the car. After 5k rpm the stock knock sensor does nothing.

Hondata has a software option to disable the knock sensor.

Dustin

 

Thanks..

 

yup hondata takes care of practically everything... you just need larger injector and a fuel pump to keep the fuel side up to speed. stock injectors run at as high as 90% STOCK... so an upgrade is necessary if more power is wanted.