Chipping computers
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Honda-Tech Member
Joined: Nov 2005
Posts: 16
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From: Dartmouth, NS, Canada
Chipping computers
I've always wondered about the whole computer chipping deal, but never really could find the information that I needed. So I am hoping to solve my curiousity and have an answer from a former hondatech.
Basically I am curious on a few things..
1. Which computers that Honda makes are chipable? All of them?
2. Assuming the list of ecu's that Honda made (as per question one) are chipable, does it matter if they are vtec motors, or does the transmission matter?
3. Do all the Honda computers take the same style chip?
4. For example, if I have an automatic dseries nonvtec computer, can I chip it with a basemap to run a b18b 5spd?
5. Where can you find the different basemaps for motors?
Anyway, thanks alot, this honda ecu thing just really confuses me and this is the only place I think I will be able to find my questions.
THANK YOU!
Basically I am curious on a few things..
1. Which computers that Honda makes are chipable? All of them?
2. Assuming the list of ecu's that Honda made (as per question one) are chipable, does it matter if they are vtec motors, or does the transmission matter?
3. Do all the Honda computers take the same style chip?
4. For example, if I have an automatic dseries nonvtec computer, can I chip it with a basemap to run a b18b 5spd?
5. Where can you find the different basemaps for motors?
Anyway, thanks alot, this honda ecu thing just really confuses me and this is the only place I think I will be able to find my questions.
THANK YOU!
Mad Scientist
Joined: Nov 2002
Posts: 5,827
Likes: 1
From: tallafizzy, FL state
Re: Chipping computers (arusht)
read this to get you started
http://www.pgmfi.org/twiki/bin...pping
http://www.pgmfi.org/twiki/bin...gMaps
and become a member at
http://www.pgmfi.org
pretty much most obd0 and obd1 are chippable, all will use a 28 pin eprom
on that website there also are rom editors that you will need to modify maps.
you can nowadays have a rom emulator with the stock ecu which will allow for real time programming.
short and weak explanation, but all is on those pages. get back with some more in depth questions
list of stock rom dumps
http://www.pgmfi.org/twiki/bin...Codes
http://www.pgmfi.org/twiki/bin...pping
http://www.pgmfi.org/twiki/bin...gMaps
and become a member at
http://www.pgmfi.org
pretty much most obd0 and obd1 are chippable, all will use a 28 pin eprom
on that website there also are rom editors that you will need to modify maps.
you can nowadays have a rom emulator with the stock ecu which will allow for real time programming.
short and weak explanation, but all is on those pages. get back with some more in depth questions
list of stock rom dumps
http://www.pgmfi.org/twiki/bin...Codes
$cat /dev/urandom
Joined: Feb 2005
Posts: 3,152
Likes: 3
From: Thornton, colorado, usa
Re: Chipping computers (mmuller)
the big 2 obd0 computers to chip are the pm6 and the pr4. any other and there are definite complications, although there are some chipping and programming resources for pr3/pw0 obd0 vtec ecus available, although most are in infancy.
the biggest obd 1 computer to chip is the p28/p06 family of ecu's and to a lesser extent the p75 family of ecu's.
all of them do use the 28 pin atmel 29c256 chip or now the 27sf512 chip since they stopped making the atmel chips a while ago.
as for your transmission question, it does matter, but most of the ecu's listed above can be converted to manual from automatic. in some cases all you have to do is move a tiny resistor to close a circuit trace located next to where the resistor previously resides.. but some are more complicated. i would suggest sticking with manual ecu's until you are comfortable soldering.
most honda ecu's do have the same style of chip, which is compatible with the 2 listed above. some however, have internal eeproms which are extrodinarily difficult to chip, of which most are pre 88 ecu's or dual point ecu's. and anything obd2 and up is out of the realm of chip it yourself technology at this point. although people are working on it in the open source community, only hondata has figured out obd2 and up stuff.
question 4, you can, but not just any deseries ecu will allow you to do that. the pm6 in that case would work.
either way, like someone said, http://www.pgmfi.org is the place to go for this info. so go there and read as much as you can. and when you think youve read everything, go to http://forum.pgmfi.org and post more questions or search for answers.
the biggest obd 1 computer to chip is the p28/p06 family of ecu's and to a lesser extent the p75 family of ecu's.
all of them do use the 28 pin atmel 29c256 chip or now the 27sf512 chip since they stopped making the atmel chips a while ago.
as for your transmission question, it does matter, but most of the ecu's listed above can be converted to manual from automatic. in some cases all you have to do is move a tiny resistor to close a circuit trace located next to where the resistor previously resides.. but some are more complicated. i would suggest sticking with manual ecu's until you are comfortable soldering.
most honda ecu's do have the same style of chip, which is compatible with the 2 listed above. some however, have internal eeproms which are extrodinarily difficult to chip, of which most are pre 88 ecu's or dual point ecu's. and anything obd2 and up is out of the realm of chip it yourself technology at this point. although people are working on it in the open source community, only hondata has figured out obd2 and up stuff.
question 4, you can, but not just any deseries ecu will allow you to do that. the pm6 in that case would work.
either way, like someone said, http://www.pgmfi.org is the place to go for this info. so go there and read as much as you can. and when you think youve read everything, go to http://forum.pgmfi.org and post more questions or search for answers.
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