I'd like to raise the rev limiter to 9500 and redo the fuel and timing maps.....

Possible to add boost capability to such as well?

 

i truly don't know anyone who would mess with the obdII ecu. the best bet is to get an aem ems obdII standalone system.

 

Let me guess, worried about emission inspection?

I too would like to know if there is an option that exist other than a fully programmable ECU like the EMS. Can the EMS store CEL and can they be fetched by Honda?

 

browse around in here in the obd2 sections
http://www.pgmfi.org/

 

To my knowledge the obd2 ecus can be rechipped, it is just a bitch to do ? i would be cheaper for you to convert to obd1 and run a program

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by len &raquo;</TD></TR><TR><TD CLASS="quote">Can the EMS store CEL and can they be fetched by Honda? </TD></TR></TABLE>


Exactly.

I don't need some "standalone" which actually just converts your car to obd1 in order to be able to reflash the rom's.....

I need an OBD2 solution. Period. NOT a conversion to obd1.

Whether it's a standalone or a reflash of the obd2 ecu doesn't matter.....

I have heard of techtom...

 

Yeah, I really wish someone would push the development of the OBD-II ECUs. There are a ton of them out there, so there is money to be made.

 

The problem with the OBD2 ecu's is that the memory and processor are combined in a one time programmable chip. The only way to reprogram them is to remove the old chip, and replace it with a reprogrammed one....everytime you need to make a change you have to do this....this gets VERY expensive and serves no real purpose. The best option if you want to keep a Honda ECU in the car is to go OBD1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spunkster &raquo;</TD></TR><TR><TD CLASS="quote">The problem with the OBD2 ecu's is that the memory and processor are combined in a one time programmable chip. The only way to reprogram them is to remove the old chip, and replace it with a reprogrammed one....everytime you need to make a change you have to do this....this gets VERY expensive and serves no real purpose. The best option if you want to keep a Honda ECU in the car is to go OBD1.</TD></TR></TABLE>


I've heard this before.

Why not develop a "reflashable" one so you don't have to replace it every time you need to make a change? Simply reflash it and not remove or replace it.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spunkster &raquo;</TD></TR><TR><TD CLASS="quote">The problem with the OBD2 ecu's is that the memory and processor are combined in a one time programmable chip. The only way to reprogram them is to remove the old chip, and replace it with a reprogrammed one....everytime you need to make a change you have to do this....this gets VERY expensive and serves no real purpose. The best option if you want to keep a Honda ECU in the car is to go OBD1.</TD></TR></TABLE>

So kinda like the old ROM chips (other than processor) in the OBD-0 ECUs.

In my opinion, if someone were to make a base map and a few hundred more RPM chips for the OBD-II ECUs, they freakin sell like hotcakes.

How cool would it be to have a DC2R OBD-II chip tuned for 93 octane that redlines at 8800rpms? Sell the chips for $100/piece and become a millionaire.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Todd00 &raquo;</TD></TR><TR><TD CLASS="quote">

So kinda like the old ROM chips (other than processor) in the OBD-0 ECUs.

In my opinion, if someone were to make a base map and a few hundred more RPM chips for the OBD-II ECUs, they freakin sell like hotcakes.

How cool would it be to have a DC2R OBD-II chip tuned for 93 octane that redlines at 8800rpms? Sell the chips for $100/piece and become a millionaire.</TD></TR></TABLE>

The problem is that the chip alone would be well over $100, they were only produced for Honda, and they are not seen anywhere else to my knowledge. Dion, aka ThePunk did a lot of searching, and he has/had some awesome electronic connections, never could find the chip. Spunkster should be able to backup my comment, or correct me, as he has access to a little more information than I do.

Austin

 

I have a custom Oki MCU chip in my OBDIIa P72 (P/N 37820-P72-A02). It came from a company called KMAX Speed in Japan. The program is a copy of the Spoon Sports DC2R computer. My friend over there found this through the auction sites. The price was 25000 Yen with 950 Yen domestic shipping and 1200 Yen international shipping.

The install is a little difficult, as the chip is an 84 pin surface mount. I installed a socket so that I wouldn't burn out the chip. The original chip didn't survive the desoldering process. There is an install link here:

http://www.altech.com.pl/wbt/_...2.htm

You can buy these Oki chips, but they are indeed expensive; I was quoted 10000 Yen for a blank chip two years ago. You also need a burner, code, etc. The code on these chips is usually protected by a security measure. The OKI 66507 spec information is here:
http://www2.okisemi.com/us/docs/Intro-5270.html

I think these may be obsolete.

 

ONly problem is that is a one time programmable chip and cannot be properly tuned for that vehicle. This is the same deal as the old OBD1 chips, but is much more expenisive, greater chance of destroying the ecu, and in the end mostly a waste of time.

What Austin said is true.

To have a custom processor/prom made would coste a fortune and would probably be buggy.

 

A few compaines have done it, namely Mugen--and I believe the ECU that came in the Lotus with the B18C5 was a modded oem unit with an 8800rpm redline.

I'm still really surprised that no one has tried to make it decently affordable. Even at $300 it would have a lot of buyers I think. That's still cheaper than the other options out there.

 

mind if i ask why you don't want to go obdI then use adaptor?,
you could use your stock ecu when evr you want and just use the obdI when you track or whenever you like.

 

you don't need a specail burner for the oki 66p507 chips. you can build and adaptor to use with a regular burner. i used to have a link on how to build one but i can't seem to find it right now.
you can get these chips for around ~$50 each. there are a few placese that still have some. its best to buy in bulk of 10 or more. then the price starts going down.
start reading up on the PGMFI forum link i put in previous post. there is lots of good obd2 info there

 

sweet. here is the scematic to build an adaptor for the OKI66 series to burn it in your 27 series burners.
http://pgmfi.org/resources/FAQ/obd2.html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snail &raquo;</TD></TR><TR><TD CLASS="quote">sweet. here is the scematic to build an adaptor for the OKI66 series to burn it in your 27 series burners.
http://pgmfi.org/resources/FAQ/obd2.html
</TD></TR></TABLE>




Good find!

I've got injectors that the stock program wouldn't know what to do with. The car wouldn't even start with the intended setup. Get it?

 

yes, but why not just go, let say hondata? or a chipped obdI ecu with adaptor.
i think the reason why there is no obdII chipped is that the cost factors.
$50 per chip vs. $.25 for the obdI chips.
sure it can be done, but for a price.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esponet &raquo;</TD></TR><TR><TD CLASS="quote">yes, but why not just go, let say hondata? or a chipped obdI ecu with adaptor.
i think the reason why there is no obdII chipped is that the cost factors.
$50 per chip vs. $.25 for the obdI chips.
sure it can be done, but for a price.
</TD></TR></TABLE>


That's like saying "there are no expensive automobiles, because they're for transportation."

Some people are willing to pay more in order to get what they want.

I already have hondata s200. I find it lacking in some areas and would prefer obd2 for certain things. Someone correct me here, but isn't the obd2 processor faster than obd1? Monitors more functions/ sensors? Do you see where I'm going with this? Furthermore, there is the rampant emissions BS to deal with. AND the fact that I don't want to have to keep swapping out injectors and ecu yearly..... Then try to tune my obd2 ecu to run with some crazy cams to the dyno and hope it doesn't throw a code on the way there so I won't fail..... Otherwise then I'll have to swap stock cams back in annually as well.

 

i can understand your point in not wanting obdI. and prefer obdII.

but i'm saying that theres simply not a whole lot of demand for these chips, since they would cost $50, and to the guys chipping them they would have to sell it above the cost, so it drives the price up, and most people will choose hondata, at that price.

i'm sure if the demand increase, then there would be more obdII chips available.
from the top of my head i could only think of, mugen and spoon. but both are configured with the stock inj. i'm assuming your injectors need resistors to work?

oh btw, obdII may be faster in processing, but the extra sensors it monitors, are emission sensors. imo sensors. evap system,cat efficiency,crankshaft sensor (lets you know if your missfiring), actual cracnk position is still based by the dist. crank sensor.

 

Good deal.

Anyone want to sell me an extra OBDII so I can figure this out?

Of course I would document all work and make a How-To

 

Would be great for those with emissions if there were an easier way to chip easily program and chip OBD2. Post a solution if there ever is one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by onyx00 &raquo;</TD></TR><TR><TD CLASS="quote">Good deal.

Anyone want to sell me an extra OBDII so I can figure this out?

Of course I would document all work and make a How-To</TD></TR></TABLE>

I'd be willing to volunteer on this project in some form. You really willing to make it happen?

 

JUN japan reprogrammed my jdm obd2 p73.