Converting a Mazda BP to Honda ECU?
 

I'm considering converting to a honda ecu instead of running megasquirt. Megasquirt just seems like its going to be too much of a pain in the ass and nobody wants to tune it. Does it matter that a BP spins CW and Honda's spin CCW? if i'm thinking correctly, it seems like it would be pretty easy after you adapted the honda distributer.

Re: Converting a Mazda BP to Honda ECU?
 

Toyotas spins clockwise and a couple of guys on here are making it work with a honda dizzy, sensor, and ecu. So there should not be a problem with a mazda motor then.

Re: Converting a Mazda BP to Honda ECU?
 

Why so scared of megasquirt? It is a pain in the ass, but its a great learning experience. What mazda engine are we talking here anyway?

Re: Converting a Mazda BP to Honda ECU?
 

I have some serious complaints about Megasquirt, but it works great on the Miatas. It should, too, seeing as how a lot of the beta testing for MS is done on Miatas. Soooo, B5, B6, BP... if you aren't looking for big drag car power, say keep it at or under 300 whp, I think it'd be more work to fit the Honda distributor.

Re: Converting a Mazda BP to Honda ECU?
 

Ya, I remember seeing a thread on here about someone converting a toyata to honda ecu. I searched for it but couldn't find it.

Its not that I'm scared of it, I just don't have the time for it right now. I'm an engineering student so the time I can spend working on my car is pretty limited. If I went with a honda ecu, I could visit Xenecron for a day and be done ya know. I can't find anyone that wants to dyno tune megasquirt. Its on a 1.8 BP.

I have access to machining equipment so I think adapting the distributor wouldn't be that hard. Am I correct in thinking that all I would have to do is adapt the distibutor, install all necessary honda sensors, then wire it up?

Re: Converting a Mazda BP to Honda ECU?
 

From what ive read theirs a few super easy ways to retrofit honda to anything. Make a bracket that mounts the dizzy onto the exhaaust or intake side cam gear. Cut the shaft weld a 12mm socket to it that presses up against the cam nut lol. VOILA honda dizzy, the rest is just wiring. You also get free halfassed ign advance retard lol.

Re: Converting a Mazda BP to Honda ECU?
 

Try this link: https://www.homemadeturbo.com/forum/...?topic=97764.0

Re: Converting a Mazda BP to Honda ECU?
 

By the time you adapt the Honda dist, plumb and wire sensors, make a conversion harness to plug in a Honda ECU, etc, you've eclipsed time it takes to solder the ~25 wires a MS needs and exceeded what a MS costs.

MS on a Miata flat out works, and has datalogging that's a ton better than some $1500 standalones.

Re: Converting a Mazda BP to Honda ECU?
 

i agree, a MS install would definately be easier. From a tuning aspect, the hona ecu would definately be easier though, right?

Re: Converting a Mazda BP to Honda ECU?
 

Tuning honestly is tuning, ive run my megsquirt for over 2 year now with great results.

Re: Converting a Mazda BP to Honda ECU?
 

just cause there are a lot of tuners out there for honda software doesnt mean they will tuna mazda running that software correctly. i would go with MS

Re: Converting a Mazda BP to Honda ECU?
 

MS it is, thanks for talkin me out of doin crazy ----.

Re: Converting a Mazda BP to Honda ECU?
 

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Yes, but tuning (depending on which) Honda software is a whole lot easier due to intelligent design. Not worth worrying about if you do one car, but if I or a shop I tune for is assembling a vehicle they push for what is the easiest path to success.

Re: Converting a Mazda BP to Honda ECU?
 

I agree with you on ease of use JD, but I just have this vision of Mase blowing up a mazda truck on 10psi running crome.

Re: Converting a Mazda BP to Honda ECU?
 

I don't think Mase has ever used Crome. He's very limited in his ability to process new information.

Re: Converting a Mazda BP to Honda ECU?
 

i have no dealings with the guy personally, but the only people i have ever heard recommend him dont have fast cars.

Re: Converting a Mazda BP to Honda ECU?
 

You mean the 300 whp sleeved engine crowd?

If only build sheets won races, right?

Re: Converting a Mazda BP to Honda ECU?
 

http://forum.pgmfi.org/viewtopic.php?f=35&t=13414

Not telling you what to do, just offering the link to how to run a Honda ECU on a Toyota engine. I think I'd stick to MS simply because it requires a hell of a lot less work to get something that works.

Re: Converting a Mazda BP to Honda ECU?
 

Those and even less powerful cars. There are some serious loosers in this area. 1jz carolla? LOL.

Re: Converting a Mazda BP to Honda ECU?
 

Ya, thats what i'm gonna do. Thanks for the link.

Re: Converting a Mazda BP to Honda ECU?
 

Adapting the distributor is the hard part IMHO, unless you have some good tools/machining stuff at your disposal. The wiring is pretty straight forward if you have a very good diagram.

I did a plug and play Honda to Nissan adapter, and it wasn't to bad. Added 1 sub harness for the distributor plug, the rest is through factory harness.

http://www.youtube.com/watch?v=YEPTR...e=channel_page

The car starts, idles, cruises clean, and doesn't blow up.

Re: Converting a Mazda BP to Honda ECU?
 

tunning megasquirt is stupid easy. if you have a wideband, the car almost will tune itself.

Re: Converting a Mazda BP to Honda ECU?
 

I the PNP kit form DIYautotune for a Miata is 725 dollars. So that would remove most of your headache. If you were to source all of the honda sensors, ecu, chipping, miata ecu for female clips, you'd be in just about as deep when you added your time in and all of that.


I'm doing the honda thing because it's the same amount of work either way for me and all of the sensors are basically the same, so that cuts out all of the harness building. What I'm doing is basically a moderately elaborate obd0 to obd1 conversion.

Re: Converting a Mazda BP to Honda ECU?
 

If I bought a P06 for $60 it'd run me $100 or so. I do have a lot of parts laying around.

Re: Converting a Mazda BP to Honda ECU?
 

My clip from the toyota ecu was 50 from the other Mr. Davis, I've got 100 in clips and sensors including my 3 bar map, ECU was free, chipping kit was 20, hulog was 35, the chip burner will be 80 since I'm getting a burn2, the wideband was 170ish. Misc ---- 30~

So I have about too much money into it. :1

Re: Converting a Mazda BP to Honda ECU?
 

Sorry. I forget I wake up in the morning loaded for bear.

After you get this car done you should drop out of school so you can do 3-8 of those conversions a week and pay off that gear in no time.

Re: Converting a Mazda BP to Honda ECU?
 

Someone else can capitalize off this junk. I'm going to law school or something.

Re: Converting a Mazda BP to Honda ECU?
 

I think any argument you came up with would be over the average juries head. You'd be the classic puddin head wilson of law.

Re: Converting a Mazda BP to Honda ECU?
 

To the OP, tuning a MS yourself is easy. You can download the basemaps that are safe enough to get you running. Read the megamanual a couple times. Then start tuning. With a wideband hooked up, you just datalog, then analyze, and save the new map. Once everything's setup, it takes ~1 hour to get the fuel map dialed in within 0.1 A/F R points of your target table. Like eating a piece of pie. As for spark, just run DIY's basemap or someone on mt.net's map that's considered "safe". Or get a knocksenseMS for like 70 bucks and have active knock detection that interfaces with MS. While doing a honda ECU setup would be badass in some ways, it's not practical.

PS-I'm an engineer in school and I MS'd and turbo'd my BP. :6 ---- 11 PSI through a GT3271 is the ----. :y