B2FiNiTY

iTrader: (2)

I have heard arguments for both ECUs. P28 is obviously a more popular choice, easier to obtain and also cheaper.

Do you recommend the P28 or the P72 and why?

BlueR

iTrader: (10)

you should go with a p28 as there is no reason other than the lack of a knock sensor

the p72 is better suited for the GSR's dual intake runners

98cwitr

I had a Kenji ECU (p28). OBD-I owns

white rocket

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueR &raquo;</TD></TR><TR><TD CLASS="quote">you should go with a p28 as there is no reason other than the lack of a knock sensor
</TD></TR></TABLE>

That was what I found after doing some research on this same topic.

clayton bigsby

iTrader: (1)

i have a ericks racing p 28 best $300 i ever spent on my R

PM-Performance

I ran the P28 with great success.
The P72 as said above is better for the Dual Runners.
Stick with simplicity IMO

GUILOTINE

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueR &raquo;</TD></TR><TR><TD CLASS="quote">you should go with a p28 as there is no reason other than the lack of a knock sensor

the p72 is better suited for the GSR's dual intake runners</TD></TR></TABLE>
you when your car starts knocking its already to late, just get a P28

kepani

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueR &raquo;</TD></TR><TR><TD CLASS="quote">you should go with a p28 as there is no reason other than the lack of a knock sensor</TD></TR></TABLE>

did some research on knock sensors. do we not need an input for a knock sensor since we (itr's and other high compression motors) only use high octane gasoline?

won't the ecu need some sort of feedback from the sensor to continually retard and advance timing?

kepani-who's an ecu n00bie...

743power

if for no other reason, get the p28 for price and availability. obd1 p72's are expensive and in demand.

Does hondata support adding a knock board to the p28?

GUILOTINE

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

did some research on knock sensors. do we not need an input for a knock sensor since we (itr's and other high compression motors) only use high octane gasoline?

won't the ecu need some sort of feedback from the sensor to continually retard and advance timing?

kepani-who's an ecu n00bie...</TD></TR></TABLE>
I wouldnt worry to much about the knock since he is gonna tune it with the Hondata and if I know Dennis it will be at Church where Shawn uses a wideband 02, car will run stoich or some **** like that


Modified by GUILOTINE at 4:04 PM 5/4/2005

743power

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GUILOTINE &raquo;</TD></TR><TR><TD CLASS="quote">
I wouldnt worry to much about the knock since he is gonna tune it with the Hondata and if I know Dennis it will be at Church where Shawn uses a wideband 02, car will run stouche or some **** like that</TD></TR></TABLE>

heh, you mean "stoich," or stoichiometric. This is 14.7:1 ratio of air to fuel when using gasoline. Stoic just means it is the chemically perfect ratio, where all fuel and oxygen is burned completely, resulting in best emissions amongst other things.

Stoich is not a "target" ratio for tuning a performance motor, generally.

GUILOTINE

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 743power &raquo;</TD></TR><TR><TD CLASS="quote">

heh, you mean "stoich," .....</TD></TR></TABLE>
you knew what I meant

itr1244

sorry to highjack your thread but got a question..
so. when you convert your obd2 to obd1 ecu (p28).. which i'm getting soon too.
-do u have to disconnect the 2ndardy O2 senser?
is there anything other than the o2 senser that has to be converted to obd1?

vtec.dc2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B2FiNiTY &raquo;</TD></TR><TR><TD CLASS="quote">I have heard arguments for both ECUs. P28 is obviously a more popular choice, easier to obtain and also cheaper.

Do you recommend the P28 or the P72 and why? </TD></TR></TABLE>

i went with p72 because of knock sensor.. not that it does anything at high rpm, but something for the piece of mind.. and dual intake runners can be disabled with hondata... nothing wrong with p28 though

CPR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr1244 &raquo;</TD></TR><TR><TD CLASS="quote">sorry to highjack your thread but got a question..
so. when you convert your obd2 to obd1 ecu (p28).. which i'm getting soon too.
-do u have to disconnect the 2ndardy O2 senser?
is there anything other than the o2 senser that has to be converted to obd1?

</TD></TR></TABLE>

No, you don't need to disconnect the secondary O2 sensor.

itr1244

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

No, you don't need to disconnect the secondary O2 sensor.</TD></TR></TABLE>

but it's no problem to do it?.. nothing would happend even if u removed it right?

743power

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr1244 &raquo;</TD></TR><TR><TD CLASS="quote">

but it's no problem to do it?.. nothing would happend even if u removed it right?</TD></TR></TABLE>

might be a good idea to pull it, put a plug in the 2nd bung and tie up the harness so it doesnt melt. Keep it somewhere safe in case you decide to go back to obd2 at any point.

itralex

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr1244 &raquo;</TD></TR><TR><TD CLASS="quote">

but it's no problem to do it?.. nothing would happend even if u removed it right?</TD></TR></TABLE>

nope, nothing happens when you remove the sensor.
i'm only running one 02 sensor on my P28

PM-Performance

The stock knock sensors are worthless. Engine vibration will set them off.
You are better without them. If you get knock, your set up wasnt tuned correctly.