VVT observations - current vs. advance - Page 8 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


ECUs and Tuning Discuss Engine Management, Tuning, & Programming

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-24-2010, 07:01 PM   #141
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Quote:
Originally Posted by y8s View Post
well that snowballed. i just wanted to point out that it could be done with the CAS.
Heh. Forums are for talking. What did you expect. :-P


Quote:
Originally Posted by richyvrlimited View Post
I have all the 2001 sensors and my MSII I built 2 opamp circuits for the CAS inputs. it works great, and I'm wont to 'fix' something that isn't broken, BTDT...

I've not researched into the mods required for the MK2 inputs, but I've read of people having lots of issues, true? Or will my two opamps suffice?!
Oh yeah, if you've got opamps on there already, then it's a no brainer - the op-amp input was originally used FOR the MK-II sensors, that's how it found it's way into the miata world (more correctly: I popped open my OEM ECU and copied the circuits I found there)... So you're running the official NB circuit readout, you can't ask for more. Really, it should be no trouble at all. It's never as easy as it seems but I would suspect you're looking at 10 minutes of wiring under the hood, you'd never need to open the MS.
-Abe.
AbeFM is offline   Reply With Quote
Old 04-25-2010, 08:01 AM   #142
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

Quote:
Originally Posted by Savington View Post
...it might be soon. Ever measured the timing slop that occurs from your CAS? How close are you to the detonation threshold? How much power are you giving up by using a cam triggered sensor vs. a crank triggered sensor?
Miles away, I'm sure I'm giving up a smidge of power, but stating it's likely to break soon is a bit wide of the mark. If that were the case the 5's engine wouldn't be reputed to take boost so well :P

again I'm not denying a crank trigger is better, but atm I'm fed up on messing with the car for little gain, I'm trying to cencentrate on reliability/drivability.
richyvrlimited is offline   Reply With Quote
Old 04-25-2010, 08:05 AM   #143
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

Quote:
Originally Posted by AbeFM View Post
Oh yeah, if you've got opamps on there already, then it's a no brainer - the op-amp input was originally used FOR the MK-II sensors, that's how it found it's way into the miata world (more correctly: I popped open my OEM ECU and copied the circuits I found there)... So you're running the official NB circuit readout, you can't ask for more. Really, it should be no trouble at all. It's never as easy as it seems but I would suspect you're looking at 10 minutes of wiring under the hood, you'd never need to open the MS.
-Abe.
now that I like the sound of, I can take my time doing the wiring/sensors under the hood, I can even route/source the signals from the CAS plug, cheers Abe!
richyvrlimited is offline   Reply With Quote
Old 04-26-2010, 11:26 AM   #144
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

Any new updates on when this board should be released?
shuiend is offline   Reply With Quote
Old 04-28-2010, 02:56 PM   #145
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

As long as the VVT advance doesn't put you past the crank tooth (I believe Y8s showed it does not) then you should be able to use the OEM sensors just fine. You should be able to switch back and forth no problem, then change one setting in software and see how it goes. Personally, I love tests where you can undo them if they go horrifically wrong. :-) Post in my board thread or spark inputs thread. There will be plenty of folks anxious to help - and I've got some potential customers who want to run my board (op-amp inputs) on their VVT motors.
AbeFM is offline   Reply With Quote
Old 04-28-2010, 05:21 PM   #146
Elite Member
Thread Starter
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

Quote:
Originally Posted by AbeFM View Post
As long as the VVT advance doesn't put you past the crank tooth (I believe Y8s showed it does not) then you should be able to use the OEM sensors just fine.
Twas me but ya.

Quote:
Personally, I love tests where you can undo them if they go horrifically wrong.
Don't you wish you could do the same for things like getting married, having a kid, taking that job or buying that house?
JasonC SBB is offline   Reply With Quote
Old 04-29-2010, 02:58 PM   #147
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

So far the house has been working out. The girl is another mater. :-)
AbeFM is offline   Reply With Quote
Old 05-08-2010, 01:34 AM   #148
Junior Member
iTrader: (1)
 
Join Date: Jan 2007
Location: Canton, GA
Posts: 116
Total Cats: 0
Default

[Update]Still awaiting arrival of the final boards :-/ .[/Update]
kcbhiw is offline   Reply With Quote
Old 05-08-2010, 09:28 AM   #149
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

Appreciate the updates

I'm mid conversion to MK2 sensors
richyvrlimited is offline   Reply With Quote
Old 05-08-2010, 02:46 PM   #150
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Glad to hear it, it'll pay off! Sit there with an timing light and you'll know.

https://www.miataturbo.net/megasquirt-18/abe-jasoncs-nb-cam-crank-input-circuits-25789/

If you have questions, post them there, everyone who knows anything about it is subscribed.
AbeFM is offline   Reply With Quote
Old 05-08-2010, 06:23 PM   #151
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

CHeers Abe, my CPK and CMK circuits are as per the MSII guide

http://www.msextra.com/doc/ms2extra/MS2-Extra_4g63.htm

so I do't think I need to do much bar wire the two sensors up and change the software settings.

I'm just taking my sweet time making a nice harness
richyvrlimited is offline   Reply With Quote
Old 05-09-2010, 04:13 PM   #152
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

I'd highly recommend the dual op-amp circuit talked about in the other thread and used with great success (several folks have built this circuit and seen their drops and cut outs stop) in my adapterboard (several folks are driving around with it happily).

Again, we're cluttering up this guy's thread, let's start a new one? Either way, good luck and I'll be happy to help any time via IM, email, or a subscribed thread.
AbeFM is offline   Reply With Quote
Old 06-18-2010, 10:25 AM   #153
MT Pony Underground
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,811
Total Cats: 0
Default

Just pulling this up to ask if there's been any progress on the VVT controller.
Nagase is offline   Reply With Quote
Old 06-20-2010, 12:09 PM   #154
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

It's like waiting for Duke Nukem Forever/GT5 this :P
richyvrlimited is offline   Reply With Quote
Old 06-21-2010, 12:58 AM   #155
Junior Member
iTrader: (1)
 
Join Date: Jan 2007
Location: Canton, GA
Posts: 116
Total Cats: 0
Default

I installed the final board revision in the car a week ago and have been testing it through last weekend's auto-x and the duration of the week. I was hoping the latest software revision was going to be "the one" but it's hit a snag. I believe that I corrected it this weekend, but we'll see. I put 50 miles worth of various logs on the car and controller today. It's funny how different the car is with the OCV disconnected.

The two major items on my punch list are as follows:
-Reliable and solid bootloader operation
-Help File/Manual

My goal is to have all said and done no later than next month, if not sooner.

The latest setup that I have yet to post:
kcbhiw is offline   Reply With Quote
Old 06-21-2010, 06:16 PM   #156
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

heh that looks really prefessional. Great job!
richyvrlimited is offline   Reply With Quote
Old 06-21-2010, 06:17 PM   #157
MT Pony Underground
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,811
Total Cats: 0
Default

Looks like an MS box to me.

Just worry about how intense the wiring for it would be, i bought an MSPNP to get away from that. >.>;
Nagase is offline   Reply With Quote
Old 06-22-2010, 12:22 AM   #158
Junior Member
iTrader: (1)
 
Join Date: Jan 2007
Location: Canton, GA
Posts: 116
Total Cats: 0
Default

Quote:
Originally Posted by Nagase View Post
Looks like an MS box to me.

Just worry about how intense the wiring for it would be, i bought an MSPNP to get away from that. >.>;
The wiring is pretty straight forward and, like the MS, it incorporates a D-style connector, but only 15 pins. I used this connector for overall availability and price (especially in low quantities) and size. The same pretty much goes for the enclosure. I wonder if B&G had a similar thought process when originally developing their box. I had no intentions of making it look like the MS, but it just happened to work out that way.

In all, everything will be documented in the included help file .
kcbhiw is offline   Reply With Quote
Old 06-22-2010, 04:14 PM   #159
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

Kevin,

Does it have the circuit built in to directly understand the stock cam and crank sensors? If so will I be able to have the signals then goto MS without needing to build the circuitry for it?
shuiend is offline   Reply With Quote
Old 06-22-2010, 11:42 PM   #160
Junior Member
iTrader: (1)
 
Join Date: Jan 2007
Location: Canton, GA
Posts: 116
Total Cats: 0
Default

Quote:
Originally Posted by shuiend View Post
Kevin,

Does it have the circuit built in to directly understand the stock cam and crank sensors? If so will I be able to have the signals then goto MS without needing to build the circuitry for it?
That's correct. You can set the controller to output either an NA CAS signal or an NB cam/crank signal to the MS. In other words, you won't have to change a thing on your MS if you're currently using a CAS and furthermore, won't have to build any additional hardware.
kcbhiw is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
In need of base map for stock 1997 brandonbkd MEGAsquirt 0 09-29-2015 12:52 AM


Tags
vvt, vvt controller

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 06:39 AM.