BP5A ECU - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

ECUs and Tuning Discuss Engine Management, Tuning, & Programming

LinkBack Thread Tools Search this Thread
Old 07-18-2013, 12:42 AM   #21
Junior Member
Join Date: Jan 2012
Location: Charleston, SC
Posts: 52
Total Cats: 1


I was going to put it in tomorrow after work but it's so god dam hot during daylight that I figured I'd give it a shot in the dark since it's a bit cooler here at 11:30 at night

Started right up, since it's dark I noticed that the check engine light is constantly on but juuuuust barely, there's no way you'd be able to see it during the day but in the pitch black of night you can just barely see that it's ever so slightly lit up which is odd.

It's definitely got a different tune, I only drove it around for 5 or 10 minutes but the first thing I noticed is that the revs don't drop as quickly and it idles at around 1,500 when you're coming to a stop, hangs there for a second, and then comes down to where it should be.

There's definitely a higher rev limit, according to the tach it's not quite 7,500 probably closer to 7,400 or 7,300 but who knows how accurate the OEM tch is and it's definitely higher than before so that's pretty cool.

Power feels about the same but again I only drove it for a very short period of time so I'll know more tomorrow after I can spend some more time in it.

I just sorta stuffed it up under the dash so that I can swap back and forth between it and the regular ECU to get some back to back comparisons and I'm scheduling dyno time soon to have the Greddy E-Manage tuned so maybe I'll even get some head to head numbers between the two ECU's, I'm curious as hell

Originally Posted by scenturion View Post
Ordered from where? YAJ?
I should be getting mine on Monday, but probably wont be able to try it for a while.
I got mine from JDM Engine Depot
Ciotti is offline   Reply With Quote
Old 08-24-2013, 11:57 AM   #22
Destroyer of Inconel
iTrader: (37)
EO2K's Avatar
Join Date: Apr 2010
Location: In ur driveway, abusin' ur WPA
Posts: 9,642
Total Cats: 954

So Ciotti, any updates? Also interested if this was installed in a CA Emissions car or a 49 state car, and what PN ECU you used.

Other than the RB header, are you running a 5A cam or squaretop on your 99? I'm curious to see what the wideband says. Also, were you able to scan that CEL?

Last edited by EO2K; 10-01-2013 at 08:54 PM.
EO2K is offline   Reply With Quote
Old 10-07-2014, 12:46 AM   #23
Junior Member
Join Date: Jul 2014
Posts: 54
Total Cats: 0

Sorry for bringing up an old thread, but instead of starting a new one I'll just add my experience. I just recently did a bp5a swap and currently running the bp5a ecu also. To better represent the jdm layouts I have converted my returnless fuel system to a true fuel return system using an na8 fuel feed line. From there I followed a diy link on miata turbo.net and have a successful fuel return system running the jdm 60psi fpr.

Motor jdm bp5a motor has the provisions for egr and egr tube. They are just blocked off and not used. The bp5a also came with a working vics system. From driving I can say the cold tune is different and top end pull is much more fulfilling versus the bp4y ecu. Currently only mod is a rb 4-1 header and custom rear muffler section. I do however have a lot of afterfire ... On throttle release and in between shifts. So far no issues and the pin outs seems correct. Please don't quote me on in-depth details as I have only been able to drive the vehicle about 40 miles , and then my fm pressure plate gave up on me. As far as the jdm ecu working I can a say that it will be a pnp in our us spec nb1.
hmongmiatanb is offline   Reply With Quote
Old 11-06-2014, 08:59 AM   #24
Join Date: Nov 2010
Location: Yorkshire, UK
Posts: 36
Total Cats: 12

NB1 and NB2 cars are being broken left right and centre in the UK due to chronic rust - if you guys in the states are after parts then UK ebay, breakers, making contact on UK forums would be a good way to go. Parts are generally cheap too (Unlike rest of Europe etc) as old cars have very little value.
snotrag is offline   Reply With Quote
Old 11-06-2014, 09:15 AM   #25
Elite Member
iTrader: (1)
Leafy's Avatar
Join Date: Jun 2012
Location: NH
Posts: 9,093
Total Cats: 90

Holy crap, I thought we had bad rust in new england, I guess the rust is worse in old england Most NBs I see arent even as rusty as my and I think I've seen a total of 1 rusted out bad enough that I would think about just parting it out and scrapping it because its unsafe (and that was an MSM, too bad he wanted 5k). I guess maybe the UK NBs didnt get the enhanced rust proofing that they did in the states.
Leafy is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM
Bp5a swap NA8 Will_da_beast Engine Performance 1 09-14-2015 08:06 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -4. The time now is 03:54 PM.