OBD II to OBD I

[MiamieNeSeX]

I have been throwing this idea around and got most of the info I needed from a pretty good NSX Tech , still wanted to get some feedback about all the particulars.
I am contemplating buying a newer model {OBDII} and swapping out my motor, tranny ,AEM oh yeah and the BBSC. How much cut and pasting is involved with the wiring harness? Pros and cons would be appreciated.

PS: I dont give a rats ass if this question has been asked before or posted numerous times. I havent, so its new to me TIA


Armando

 

[WOODY]

if Devin is not the nsx tech referred to he is a must on your contact list. In previous conversations he mentioned that he has everything required to do another conversion ( if it want stolen :frown: ). It is a bigger pain in the a$$ than you would think and not cheap to have it done. In the neighborhood of $5000 i've been told.

 

[Yellow Rose]

A One And A Two, A One And A Two.....

.....let's salsa, you Cuban. :tongue:

Respectfully, the $5000 figure appears to be high. If Armando is re-using the old parts from his 92, then all to be paid for is the labor.

An important component not be overlooked is the gas pedal (and the throttle body) as these two are different on OBD-1 and OBD-2.

Armando - your "rat's ass" comment is not earning any good reputation points with me. Please govern yourself accordingly. :smile:

 

[NetViper]

There had been talk that the AEM might work on OBD2 in the near future with the NSX. If that is a possibilty, you might save a lot of money waiting a couple of months. I am not sure how soon you plan on getting the new car. Just a thought. I am sure Devin can give us a hint if that will be possible. Hell, you have probably already talked to him and know the answer already. If that is the case, please ignore my comments. :smile:

 

[MiamieNeSeX]

Re: A One And A Two, A One And A Two.....

.....let's salsa, you Cuban. :tongue:

Doe si Doe

Respectfully, the $5000 figure appears to be high. If Armando is re-using the old parts from his 92, then all to be paid for is the labor.

Also bing taken into consideration are the surplus of parts(motor,tranny) that can be sold to defer most if not all the costs.

Armando - your "rat's ass" comment is not earning any good reputation points with me. Please govern yourself accordingly. :smile:

I should have said "horses' ass" to make the Houstonians feel at home then. :biggrin:

Armando

 

[MiamieNeSeX]

There had been talk that the AEM might work on OBD2 in the near future with the NSX. If that is a possibilty, you might save a lot of money waiting a couple of months. I am not sure how soon you plan on getting the new car. Just a thought. I am sure Devin can give us a hint if that will be possible. Hell, you have probably already talked to him and know the answer already. If that is the case, please ignore my comments. :smile:

My understanding is that AEM has no plans to do anything with our OBDII in the near future.
http://forum.aempower.com/bbs/viewtopic.php?t=10543

PS Ignoring your comments is a gimme. lol

Armando

 

[NetViper]

PS Ignoring your comments is a gimme. lol

Armando

I knew that was coming. :biggrin:

 

[MiamieNeSeX]

Although I have to take it easier on you, as you have come over to the dark side and are now part of "The Family"

Armando

 

[NetViper]

Although I have to take it easier on you, as you have come over to the dark side and are now part of "The Family"
Armando

I am a very proud member of "The Family". I have A LOT to learn.

 

[WOODY]

Respectfully, the $5000 figure appears to be high. If Armando is re-using the old parts from his 92, then all to be paid for is the labor

this was the price Devin quoted me last year when i was kicking around the idea. he said it was more complicated than it appeared, including some custom harness work. i will let him speak for himself. the hks solution, tbw module, plus harness looks to be approx $4000. is that the mark to beat to make it worthwhile?

 

[KGP]

My understanding is that AEM has no plans to do anything with our OBDII in the near future.
http://forum.aempower.com/bbs/viewtopic.php?t=10543

AEM holds their cards very close to their vest, which IMO is a very smart thing to do. They could well be in the later stage of an OBDii product development, and we may know nothing about it. I take no stock in the response to that AEM thread, one way or the other.

However, the HKS FCON is available now and warrants a look. A few weeks ago I saw the 97 in Vegas with it, and it looks to be running great.

 

[Elite]

They are indeed relatively close to releasing their first OBDII TBW application... The 350Z/G35 etc. Then I think the SRT-4 is up... Unfortunately, the NSX application does not look to be in the near future... However like I have said before... If they happen to receive a lot of phone calls and emails regarding the application... It may move up on the priority list.

 

[KGP]

If they happen to receive a lot of phone calls and emails regarding the application :smile: ... It may move up on the priority list.

Or, have John C step-up to an obd2 NSX. :biggrin:

 

[ScienceofSpeed]

Something in the works using the AEM EMS, however, it is in very early prototype stage. Later this summer, we should have more details.

Cheers,
-- Chris

 

[Factor X Motorsports]

You may want to give the HKS F-Con V-pro a look. We have it running on a 97 and it works great. This is not something new as they have been running this ems in Japan for sometime.

Call us cowards but we are a bit gun shy on trying another beta or 1st release ems for the NSX, especially when the manufacturers do not stand behind their product or mistakes.

 

[NetViper]

Call us cowards but we are a bit gun shy on trying another beta or 1st release ems for the NSX, especially when the manufacturers do not stand behind their product or mistakes.

Are you talking about AEM or HKS?

 

[Devin@AEM]

Here are a couple quotes from the aempower.com forum regarding various apps that are a quite a bit more labor intensive due to TBW and other complicated electronics chanllenges:


"We are currently working on an EMS for the 350Z/G35 applications but do not have a release date at this time since this project is still in the engineering stage. As soon as we have a date, we will post it here on the [www.aempower.com] Forum."

"The 350Z application (along with a few others we're working on right now as well) will maintain the factory ECU for communication over the databus and DBW control. It will still plug into the factory harness like any other application but we'll probably have a short harness branched off the EMS that will connect to the stock ECU."

"When we have news, we'll post it. The project is worked on daily."

"I would not wait oin this application if you have something in desperate need of an EMS now."


I wish I had more inspiring news regarding the NSX OBDII application, but I don't.

 

[Devin@AEM]

As for the thousands of dollars quote to convert from OBDI to OBDII, I am sure others can do the conversion for much less. When the price includes all of the parts needed (intake manifold, TB, complete engine wire harness, entire pedal assembly, throttle cable, etc.), you need to be careful of the cost of parts. At a deeply discounted rate, you are thousands for just parts alone. If someone got lucky, you could source the parts used and save some money there.

The conversion was a big PITA. I really don't ever want to do it again. It is possible, it takes a lot of time, there is quite a bit of wiring involved, and it works.

 

[len3.8]

As for the thousands of dollars quote to convert from OBDI to OBDII, I am sure others can do the conversion for much less. When the price includes all of the parts needed (intake manifold, TB, complete engine wire harness, entire pedal assembly, throttle cable, etc.), you need to be careful of the cost of parts. At a deeply discounted rate, you are thousands for just parts alone. If someone got lucky, you could source the parts used and save some money there.

The conversion was a big PITA. I really don't ever want to do it again. It is possible, it takes a lot of time, there is quite a bit of wiring involved, and it works.

I to II is much more expensive than II to I, However the II to I does not have to cost Thousands of $$$'s.

I know it did not cost me thousands of Dollars. OBDII to I due to the Tec3R not liking the Bastard of a system that happens to be in the 95 cars. YMMV

 

[Devin@AEM]

I appologize for the misprint on my part. I was actually refering to the OBDII to OBDI conversion I did on my car.

I agree that piggybacking would be cheaper (oem ECU running various systems like the DBW for example and an aftermarket standalone managing the fuel, timing, etc).

When I did my conversion, I replaced everything necessary to truly convert to throttle cable and OBDI. If you have the parts available to do this type of conversion at a deep discount or have a donor car to strip, I agree, the conversion wouldn't be very much money - just a LOT of time.

 

[caseycarson]

When you go to inspect the car, if the year model is supposed to be OBD-II, will you be able to pass the inspection if it isn't OBD-II?

 

[Yellow Rose]

Inspection

When you go to inspect the car, if the year model is supposed to be OBD-II, will you be able to pass the inspection if it isn't OBD-II?

When you say the word "inspection" do you mean the annual state certification or somebody looking at a car for a potential buyer?

If The Former

In the State of Texas, emissions testing is required on an OBD-2 car beginning in 1996, by means of a laptop. Even if a vehicle is fully compliant in 1995 (such as the NSX) to OBD-2 standards, it will be tested to OBD-1 standards. OBD-1 testing requires actual tailpipe sniffing. OBD-2 testing is simply a matter of downloading any CEL codes the ECU has stored, and sending them to Austin. Wowzers, if an OBD-2 car has random emission problems, the owner can pull over two blocks from the inspection shop, reset the ECU, then have the car inspected as if nothing is wrong.

If The Latter

It is virtually impossible for the average non-tech to discern a wire harness from an OBD-1 vs an OBD-2 NSX. The one thing that will definitely stand out, is the fact that an OBD-1 car will have a throttle cable penetrating the bulkhead, leading to the throttle body. The OBD-2 NSXs do not have this cable.

 

[Factor X Motorsports]

Why bother with the conversions and hybrids? Just go with the HKS F-Con V-pro it is a more elegant solution that works.