jeffsciv23

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

huh?????! that sure didnt help at alll..</TD></TR></TABLE>

it was just the simple version instead of getting into the way an OBD2 ecu works. but to draw a picture for you ill post up the timing maps for both in crome.

P28 base timing



P2P base timing



you can see how different it is and you would think that all you woul dhave to do is just make the numbers match right? nope its not that easy. if you would like to learn more or read for yourself search pgmfi.org on p2p timing.

jeffsciv23

oh and you have to remember that the base timing for the Y8 is supposed to be 12, so the maps in crome show it about 9.25* off. so just subtract 9.25 from the timing tables right? wrong it doesn't work like that. there was an 8 page discussion of trial and error with alot of Y8/crome users.

xelloss

I've just swapped the P28 to my y8....i feel it picks up even slower then my stock P2P... not sure why, but really don't like that feeling when you installed something would be better then stock, end up even worse, unless you spend more time and money to fine tune that thing...really sucks..

jeffsciv23

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xelloss &raquo;</TD></TR><TR><TD CLASS="quote">I've just swapped the P28 to my y8....i feel it picks up even slower then my stock P2P... not sure why, but really don't like that feeling when you installed something would be better then stock, end up even worse, unless you spend more time and money to fine tune that thing...really sucks..

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

running a completley different timing map then your motor needs is the reason why its slower then stock now.

K7-1Ktrevor

I have a friend with a d16y8 in his crx running a p28. car runs good, but runs rich, he says he gets 20 mpg in town. we are just gonna throw a d16z6 in it instead of getting it tuned.

Mr Mobsta Man

This is good to know, I was about to try and run my Y8 on a stock p28 map soon... Any chance anyone has the stock map for a Y8 I can use instead? There isn't a file on Smanager already for it and I checked hondata's site and they don't have one either.

jeffsciv23

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr Mobsta Man &raquo;</TD></TR><TR><TD CLASS="quote">Any chance anyone has the stock map for a Y8 I can use instead? </TD></TR></TABLE>

i can email you the P2P rom dump but its no better then runnign the P28 map. not sure why but something def gets lost in translation. my advice is if your wanting to run a p28 or chipped ecu and be able to make good power and easily tune it just get a z6 head. but thats just my opinion.

Mr Mobsta Man

I actually just wanted to use s300 to control the nitrous on my Y8 until I have my H2B setup put together then I want to use the same ecu with an h22 map.
My email is tmanzo90@msn.com if you don't mind sending me the p2p file anyway.

Sorry, I guess I'm threadjacking also.

jeffsciv23

oh if your using hondata then my map wont work for you, its for crome

supraccordlx

your maps are garbage, they are just generic maps preloaded on crome.

jeffsciv23

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by supraccordlx &raquo;</TD></TR><TR><TD CLASS="quote">your maps are garbage, they are just generic maps preloaded on crome. </TD></TR></TABLE>

they are stock ROM dumps from the ecu and motor in the topic. not sure what you are thinking that means but yeah, stock map.

thanks capt obvious

alpha_1

the timing IS different from the z6 and y8...if you really want a p28...the 96-97 del sol SI comes with a OBD2 D16y8 but with a P28 ecu...trust me i just bought a 96 del sol SI and it comes with a P28 OBD2. the timing is the same as the y8 but it DOESN'T have the EVAP code

jeffsciv23

theres no performance upgrade by useing a stock OBD1 p28 unless you decide to chip it and get a map for your set-up and tune.
never knew they came in obd2, thats good to know in case it ever comes up.

honisoto

okay, so.....I can't just burn a stock d16y8 basemap on to a chip and stick it in my chipped p28 eprom slot??

jeffsciv23

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honisoto &raquo;</TD></TR><TR><TD CLASS="quote">okay, so.....I can't just burn a stock d16y8 basemap on to a chip and stick it in my chipped p28 eprom slot??</TD></TR></TABLE>

the p2p rom is not accurate at all. your car would perform better if you were just to run the stock ecu or like said above try to find a obd2 p28 from a 96-97 del sol si. i have heard many reasons why the stock p2p rom dump is off, like the obd2 ecu corrects timing from input from the KS and that the cam gear has an extra tooth. not sure if any of those theorys are correct but i do know that its not as easy as burning the p2p rom to a chip.

94EG8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeffsciv23 &raquo;</TD></TR><TR><TD CLASS="quote">or like said above try to find a obd2 p28 from a 96-97 del sol si.</TD></TR></TABLE>

There are no OBD2 P28s. The '96 - '97 Del Sol Si's used a D16Y8 and P2P the same as the '96 - '00 Civic EX coupes.

jeffsciv23

he says his car came with one.

jeffsciv23

here is a picture a guy took of his ecu, its a 97 delsol with y8.

94EG8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeffsciv23 &raquo;</TD></TR><TR><TD CLASS="quote">here is a picture a guy took of his ecu, its a 97 delsol with y8.</TD></TR></TABLE>

What the freak. I'm still not sure if thats OBD2 or not without being able to see the plugs, but what country code is 3? Its definately a late revision.

alpha_1

trust me the 96-97 del sol has the OBD2 P28...i have one and its like the pix above..

honisoto

Is the delsol p28 plugs same as the obd1 plugs or the same as the obd2a plug?? alpha_1 didnt I buy the obd2a vtec harness from you? haha help me out bro..

B18C5-EH2

Well i just called my local Honda dealership parts department and asked for the part number for a 1997 Del Sol Si (SOHC) ECU/ECM and he told me it was 37820-P28-A20.

I've heard of the OBD2 P28 but have never seen one personally. I know it exists for sure now.

94EG8

I conceed defeat, I must say i'm more than a little surprised, dumbfounded really.

jeffsciv23

i was pretty suprised about it too. i had never heard of it before, but then again i didnt even know that they made del sols till 97 lol.

honisoto

bump again...and note: why did they discontinue the delsols?