elmejor

hey i have recently did a gsr swap on my 95 coupe and im running a p28 not sure if its chipped but my car is kind of slow, will it make a difference if i put a p72 ecu on it will it be better?

BlueIntegraBoy

iTrader: (5)

It will run MUCH better with the P72.The P72 has the knock sensor board, the correct fuel maps, and IAB control.

i drive a honda

pull the cover on the p28, pretty easy to tell if there is an eeprom there or not.

elmejor

what is an eeprom?

i drive a honda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elmejor &raquo;</TD></TR><TR><TD CLASS="quote">what is an eeprom?</TD></TR></TABLE>

electronic erasable proramable read only memomry

older stryle chips honda used to flash the fuel and ignition maps on, probably havent heard of them becuase they were huge in the 80's and 90's

elmejor

how can i determine if my p28 has it?

slvrcvc93

you have to open the ecu use the search and you can see the pictures

elmejor

i know how to open the ecu i just want to know how does the eeprom looks like, so i can know if i have it or not

sageuvagony

i drive a honda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elmejor &raquo;</TD></TR><TR><TD CLASS="quote">i know how to open the ecu i just want to know how does the eeprom looks like, so i can know if i have it or not</TD></TR></TABLE>

post a picture of it, usally they have windows on them, sometimes they can be erased with blacklight shined throught that window.


another dead giveaway is that most people use ZIF sockets (zero insertion force) sockets i belive are 28 pin,

it looks like the zif socket you put your processor into on your computer. ust not as many pins haha.

and its also easy to tell becuase there usually is nothing there factory, some of this kids that do it also are horrible at soldering, so check the back and if it looks like amatuer soldering IE not by a circuit board supplier then it probably has a reflashed map.

problem is even dumping the map onto a programn you still cant tell what map it is, only the values that it ws and a best guess, so id remove it and flash it with w/e you want. maybe check out pgmfi and find a pro tuned map that closely matches your setup.

B18C5-EH2

What intake manifold does your GS-R engine have?

If it has the stock dual butterfly manifold it looks like this:



If you in fact have the stocker then you NEED the stock P72 ECU as it has the IM butterfly controls, the proper VTEC cross over, etc.

If you have a Skunk2 manifold then a rechipped P28 would be the way to go.

92VXeg

iTrader: (1)

not trying to thread jack but will a chip from phearable for my lsv in a p28 ecu be the best idea for the ecu. since i already have a p28 and instead of getting a p72

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92VXeg &raquo;</TD></TR><TR><TD CLASS="quote">not trying to thread jack but will a chip from phearable for my lsv in a p28 ecu be the best idea for the ecu. since i already have a p28 and instead of getting a p72</TD></TR></TABLE>

Ideally a local guy can chip your P28 with a programmable set-up such as Uberdata, Crome, Neptune, etc. It's like a Phearable set-up tuned specifically for your set-up on a dyno.

Nothing beats individually dyno and street tuned programs.

If this isn't an opiton then yes Phearable does good ECU programs, and they would probably rather start with a P28 anyways.

The only thing a P72 ECU is good for is if you have a stock GS-R intake manifold pictured above.

i drive a honda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92VXeg &raquo;</TD></TR><TR><TD CLASS="quote">not trying to thread jack but will a chip from phearable for my lsv in a p28 ecu be the best idea for the ecu. since i already have a p28 and instead of getting a p72</TD></TR></TABLE>

pherable just sells you the zif, and eeprom, its up to you to burn the map with any given freeware or opensource programn.

if you pay them they will simply solder-suck the holes, solder in the 28-pin zif, and supply you with a number of 28 pin eeprom's

i belive they move a connector over too. its been awhile for me.

uberdata, crome, etc are just programns that let you open up the binary (.bin) files to view their contenets and edit them.

i belive in the old days they used hex editors and a visaul basic programn named ghettodyne.

don't be confused...... more than just p28 can be chipped, and a p72 can be chipped just as well.

92VXeg

iTrader: (1)

yea thats what im trying to figure out. thanks. but i bought my friends p28 that was chipped with neptune but the chip is now gone and the ecu is now chipless so i figured that phearable would be the best option

jasoncrashtech

a p28 also has a lower rev limiter also. i think it's about 7400, or 7500 rpm's. that motor peak's at 7,800rpm. as a swap and drive set up the p72 with the proper wiring is the way to go.

92VXeg

iTrader: (1)

the motor its for is built nicely/ sleeved vorged internals...all that good stuff but its also being turboed since i have 9:1 cp are in it im just wondering what to tell phearable because they send you a chip to the specs of your motor

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92VXeg &raquo;</TD></TR><TR><TD CLASS="quote">the motor its for is built nicely/ sleeved vorged internals...all that good stuff but its also being turboed since i have 9:1 cp are in it im just wondering what to tell phearable because they send you a chip to the specs of your motor</TD></TR></TABLE>

Dude that kind of info needs to be posted FIRST in your very first post!

Now knowing that I'd say stay away from the "one chip does all" stuff and find yourself a local tuner that can install and tune Uberdata, Crome, Neptune, or Hondata on a dyno so that it's tuned specificall for your exact set-up, not some generic map.

elmejor

so right now i have a stock gsr intake manifold but im planning on getting a skunk 2 one, so should i just stay with my p28 and get it chip the right way?

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elmejor &raquo;</TD></TR><TR><TD CLASS="quote">so right now i have a stock gsr intake manifold but im planning on getting a skunk 2 one, so should i just stay with my p28 and get it chip the right way?</TD></TR></TABLE>

If you KNOW you're getting the S2 manifold then don't bother hunting down a P72.

...but I would like to point out that a GS-R engine with an S2 manifold and the proper chipped P28 with it's S2 manifold ideal VTEC cross over will likely cause the engine to pop out of VTEC when you change gears for a moment if your tranny is a GS-R or LS tranny.

Honda designed the B16A and ITR with higher revs, higher VTEC cross over, and thus also gave them shorter gearing which keeps them deep in VTEC when going through the gears.

Anything less than a 8200rpm shift on a GS-R tranny with a 5800rpm VTEC cross over and it will drop out of VTEC, and an LS is even worse. If you lower the VTEc much more than 5800rpm on an S2 manifold with GS-R cams it'll have a big-*** flat spot in the power/torque curve right before VTEC.


Modified by B18C5-EH2 at 9:08 AM 8/14/2008

2fastek

get it tuned

92VXeg

iTrader: (1)

my built motor post was not the OP....i just stating what was done with the motor. No its not turboed right just built ready to b reak the motor in,,,leaving it lsv for a thousand miles or so so which is why i i figure i dont need it tuned until i get it turboed...Cant i just get a chip from phearable to run my lsv setup until i put the turbo on. i know i will need a tune then i just need a chip to get it running nicely before im boosted