Which would be my best choice for my setup? I am getting Jun Cams, camgears, etc.. I would like to be able to tune after each mod I do, i.e. Pistons, etc. Which will I be able to get the most power out of when tuning?

 

JUN ECU
Hondata

Hondata stage 4: $850
OBD-I ECU: $150 (not sure)
OBD-I Adapter: $200
-----------------------
Total: $1200

*$1200 + optional EPROM (faster tuning) = $1470

$1470 for everything
personally I think the Hondata is the best
price & performance wise

check it out: http://www.c-speedracing.com/onlinestore/hondata.html

 

What is the point of getting an OBD-I ECU and adapter?

 

you HAVE to have an obd-1 ecu in order to take advantage of the hondata system. obd2 won't do.

 

What is OBD-I and OBD-II though?

 

the Hondata isn't like the Power FC
it's not a reprogrammable ECU
you tune with the Hondata and burn a chip which you put into the ECU
just check out the site, it will explain everything

someone correct me if I'm wrong

 

http://www.hondata.com

 

1 Fast R, you read my mind, I just came to my computer to post a topic like this.

I was wondering what you guys thought too. I actually have the JUN ecu, so I can tell you that it works, but the question is can you get something better?? Who would know how to tune JUN cams better than JUN?

The benefits of the hondata and Power FC would be if you change something on the car, you can just retune, rather than ship your ecu back out to Japan and have all of that downtime. One thing I know though is that JUN's ecu has a faster processer speed. How much of a difference does that make? I don't have a clue, but maybe someone on this board does, but I will probably call them tomorrow and try to get some more specs on the processing speed.

Here is the two problems that I would say with the JUN ecu. 1. You have to send it back to them to retune it if you change something major on the car. 2. Japan is 3000 miles away. Can they really tune an ecu better than a tuner could who lived up at my elevation(4500 feet)?

I would say if JUN actually came to Utah, and tuned my ecu here, they would make more power, but that isn't going to happen. The JUN ecu that I have is awesome, and if is suppose to have a really fast processor, but can I get more power by tuning it on a dyno up here with something else. I would like to find that out because I have to retune my car anyway, but I'm just trying to decide which route to go.

Sorry about the essay.

 

Just curious, what air/fuel ratio are most of you guys tuning your cars to in vtec at full throttle, and are you richening it up a bit right before redline??

 

all cars are different
13.1-13.5

 

Power FC You cant make changes on the Fly with the Hondata, you can with the FC. I dont like "Preprogrammed ECU's" as you can always make more power by tuning with an reprogramable ECU also you dont have to send out your ECU to be remapped when you add or delete parts from the equation, With the FC or Hondata you just Tune it on the Dyno and your done, and its Much more precise.

 

you could make changes on the fly with the Hondata
just get the EPROM programmer for $270 and a laptop

 

No you cant, You have to turn off the car, Start reprogramming, It burns it into the chip Start it back up and then see how it effects it, With the FC you can Drive and change variables at the same time, Makes street and Dyno tuning Much easier.

 

If you get the racelogic emulator then it is realtime.
THe primary problems with the powerFC is the programming through
a little handheld, and the fact that you are changing a correction map
rather than the base map itself. PowerFC could be a real nice setup
IF AND ONLY IF you get the powerXL windows software and interface
equipment to go with it.

 

the power FC completey replaces the stock ECU right? Does it plug into obd2 or does it need an adapter like the hondata?

 

Steve have any info on the racelogic emulator?

 

It plugs into OBD2 but not the newer OBD2 on 00-01 cars, You would still need and adapter

 

So what would you guys suggest doing in my situation? Would you keep the JUN ecu that I have, and then maybe just use a V-AFC to fine tune it, but do you guys know if the processing speed makes a difference??

 

sell the JUN ECU

woohoo 1200 posts

 

AJR reprogram ECU !!!

Hondata is a good unit but the thing I don't like it cuz it USDM OBD1 all USDM or JDM 92-95 OBD1 ECUs are dummer. OBD2 and OBD3 has WAY faster processing speed. USDM OBD2 and JDM OBD2 (runs OBD1 program same mother board) will be the best for now since you cannot modify OBD3 ECUs.

 

Isn't the AJR ECU programmed by Yoshio at Japanese Automotive?

So what is the different between AJR ECU and I call up Yoshio and tell him what mods I have and have to program my ECU to his experience? Unless Yoshio is doing something different to those AJR ECU to make it out perform all other ECU that he reprogram, I don't what so special about the AJR ECU that make you said it is much better? Or is that AJR ECU =Yoshio ECU rumor wrong? Then I am really SORRY!!

To me Hondata and Power FC is totally different than those reprogrammed ECU. So if you know what you are doing and know how to tune the Hondata or the FC yourself, then get either one. If not, just use the JUN ECU, I am sure JUN know a hell lot better in what ECU program work better of their cams than others.

 

Here's my take as to why I THINK....key word here is THINK .....
JUN doesn't know PooP about their own programs when it comes to mating them "perfectly" with their cams.

How can you sell an ECU prog'd in Japan which was designed to run on 98plus octane for people who ..by majority only have 91RON at their disposal? For the lucky few, there might be 92...and the select few 94 for daily consumption.

How the hell can you possibly have all these selections in gas ratings and to top it off... different and varying atmospheric conditions and have an ECU tuned half way around the world to drop right in with your cams?

Something I don't know perhaps... I'm willing to be ABSOLUTELY schooled on this subject by somebody who has the answers.... I'll eat these words right here.... I'm here to learn...

Tuning an engine, to me is like raising a child.... you simply can't do it when you are miles, let alone in another country away.... you gotta be there to guide it and meet its needs. Not make educated guesses.

Power FC, Hondata....etc...could nail it dead on fit to the gas you want to run, the conditions you face when it comes to air... etc. How can a tuner account for this in Japan...when somebody in Colorado, mile high and all, just bought the JUN III cams?

For whatever it is worth.... didn't somebody buy a JUN ecu a little while back on clubsi and took it apart to find it to be an OBDI board? Anybody back me up here?

 

That why I said buy the Hondata or the Power FC if you or someone in your area know how to tune it.

But if I have to pick from either AJR, Yoshio, JUN ECU, I would go with JUN because I am sure JUN know the most about their cams out of them.

 

POWER FC

 

HONDATA