Pat's Ebay Turbo Compound Boost Build - Page 39 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Build Threads Building a motor? Post the progress here.

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 10-05-2016, 11:00 PM   #761
Junior Member
 
Join Date: Mar 2013
Posts: 108
Total Cats: 6
Default

Quote:
Originally Posted by patsmx5 View Post
I don't know which would be easier, but I figured at least this way it should work since I won't have to actually modify the harness itself, just install it. The auto has its own computer, and the engine computer is different as well. Auto computer has 20-25 wires going to it, the trans has 3 solenoids, turbine speed sensor, VSS, and a big rotary switch on the shift linkage. Inside there is now a harness for the auto shifter as well.
will a megashift kit work with it ? Megasquirt make them

http://www.msgpio.com/manuals/mshift/4L60e.html
mx5psi is offline   Reply With Quote
Old 10-06-2016, 01:45 AM   #762
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Quote:
Originally Posted by miata2fast View Post
Why do you need a tranny computer? Will you not be manually shifting it?
I'm not 100% sure what all it does with the ECU or trans. I'm just swapping everything so that it 100% will work as it's supposed to. As mentioned an aftermarket computer could shift it, but this should also work and run/drive as well as stock without any tuning or anything. And it should idle up when shifted in to drive, etc. No doubt this is a nightmare to do the swap. It looks like about 4 hrs to remove/install the new trans, and 4-5 days for the wiring to make it work! I hope it all works well when it's done.

On the up side, my old harness had been modified over the years for various things, so at least now I have a clean/unaltered one going in the car which is nice.

As for manually shifting it yeah probalby when racing, will have to see how it does at WOT with the TCU doing the shifting. For regular driving I want it to shift automatically of course.

Manual is out, clutch/flywheel is out, master/slave/hoses/pedal is out, and wiring harness for the dash is coming out, both sides that go into the engine bay are laying in the cabin now.

Also going to clean up some of my MS wiring while the car is in a thousand pieces.
patsmx5 is offline   Reply With Quote
Old 10-06-2016, 12:31 PM   #763
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 994
Total Cats: 38
Default

I installed a US Shift controller The US Shift Transmission Control System on a Ford E4OD for a friend's truck. But I don't think they have harnesses and programming for our non-domestic ATs. The ability to load different shift profiles and paddle-shift is very helpful. You can also adjust transmission fluid pressure for smoothness of shifts (or harder shifts if so desired). But to begin with I'd go with the stock computer as well and see what breaks. If AT works and doesn't blow up then go with fancy controls.
stefanst is offline   Reply With Quote
Old 10-06-2016, 02:43 PM   #764
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 33,152
Total Cats: 1,990
Default

I'm still scratching my head about this over a 'glide but what do I know.
18psi is offline   Reply With Quote
Old 10-07-2016, 02:43 AM   #765
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Cleaned and painted the intake mani, valve cover, coil bracket, and a few odd brackets/bolts for those components. Have wanted to this for 10 years now, so while I had the intake off I went ahead and did it. Set me back about 6 hours to get all this cleaned and painted. Will take pics of valve cover when it wrinkles, I just sprayed it. And will post pics of it installed when the car finally goes back together. Will be nice to have the engine bay looking better.

I ripped out my old wiring box I installed in 2013. Going to redo it. Fans will now have separate PWM control for each fan, no more low/high via series/parallel relay configuration. Time delay will now be done via software instead of with a time delay relay. Components for fan controller arrive tomorrow and I'll get that built and tested.

Next plan is to clean the engine bay while everything is out, and then pull the last bit of harness from the car (the part that runs from battery to starter). Then remove a few more wires from cabin from MS install for things that I'm going to redo or not use, then I will begin installing new wiring harness. Going to tap a few wires from the factory harness to share with the MS as before. Will also redo the wiring for my warning lights while the dash is out.

I guess I can mention this, but if anyone wants a ACT-XT 6 puck/flywheel/6 speed/MiataRoadster shifter that were abused but still work great, I have them for sale.

Attached Thumbnails
Pat's Ebay Turbo Compound Boost Build-20161005_015843.jpg   Pat's Ebay Turbo Compound Boost Build-20161007_000801.jpg   Pat's Ebay Turbo Compound Boost Build-20161007_000829.jpg   Pat's Ebay Turbo Compound Boost Build-20161007_001240.jpg   Pat's Ebay Turbo Compound Boost Build-20161007_001245.jpg  

patsmx5 is offline   Reply With Quote
Old 10-07-2016, 05:39 AM   #766
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Quote:
Originally Posted by stefanst View Post
I installed a US Shift controller The US Shift Transmission Control System on a Ford E4OD for a friend's truck. But I don't think they have harnesses and programming for our non-domestic ATs. The ability to load different shift profiles and paddle-shift is very helpful. You can also adjust transmission fluid pressure for smoothness of shifts (or harder shifts if so desired). But to begin with I'd go with the stock computer as well and see what breaks. If AT works and doesn't blow up then go with fancy controls.
I think if I decide to modify any of the shifting parameters (that the TCU controls), it would be fore the auto to shift at a higher RPM. I think I could modify the signals going to the TCU to achieve that. I doubt I'll ever put a standalone TCU in the car, but who knows.

The painted valve cover is drying and it looks SWEET! Can't wait to get the car back together. I'm cleaning up the engine bay as well, going to try to make this look a lot better when I open the hood.
patsmx5 is offline   Reply With Quote
Old 10-07-2016, 09:57 AM   #767
Hug Life
iTrader: (3)
 
Monk's Avatar
 
Join Date: Apr 2014
Location: Huntington, Indiana
Posts: 2,399
Total Cats: 356
Default

Can't you just put in a vacuum shift modulator from a 300zx to make it shift higher?
Gimme a minute to find the info on that...

Last edited by Monk; 10-07-2016 at 09:59 AM. Reason: Edit: I was tunking about the wrong part
Monk is online now   Reply With Quote
Old 10-07-2016, 01:45 PM   #768
Hug Life
iTrader: (3)
 
Monk's Avatar
 
Join Date: Apr 2014
Location: Huntington, Indiana
Posts: 2,399
Total Cats: 356
Default

I missed the part earlier where you already mentioned the 300zx, but here is the thread where we mention changing the modulator.
Turbocharging/Supercharging NB with automatic transmission
There is also a wiring diagram buried in there somewhere.

Edit: here it is
http://www.y8spec.com/miata_tech/wiring%20all.pdf
Monk is online now   Reply With Quote
Old 10-07-2016, 03:56 PM   #769
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Thanks for the info, I had not seen that thread. Even has a video of a turbo auto miata.

The NB transmission apparently doesn't have a vacuum modulator, it's all electronically controlled through the computer. But that 300zx modulator would be nice for the older autos. In fact I could end up using the older auto if I can't get the newer one built to take the power.

Parts arrived for fan controller, going to start building that.
patsmx5 is offline   Reply With Quote
Old 10-07-2016, 10:08 PM   #770
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: woosta, ma
Posts: 8,604
Total Cats: 91
Default

I think using the stock computer and line pressure you'll probably smoke it before you break something.
Leafy is offline   Reply With Quote
Old 10-08-2016, 12:29 AM   #771
Junior Member
 
Join Date: Mar 2013
Posts: 108
Total Cats: 6
Default

i think pats will be able to firm up the shifts i think the input and output shaft strength may be the issue with drag launches

credit it to him for having a go
mx5psi is offline   Reply With Quote
Old 10-08-2016, 02:40 AM   #772
Junior Member
 
farpolemiddle's Avatar
 
Join Date: May 2016
Location: Lents, Oregon
Posts: 327
Total Cats: 24
Default

This may have been mentioned and I may have missed it but why not just convert the tranny to a manual valve body somehow and skip the computer stuff? Yes a little annoying to do all the shifting but race car. I had a Nova set up that way.
farpolemiddle is offline   Reply With Quote
Old 10-08-2016, 03:00 AM   #773
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Quote:
Originally Posted by farpolemiddle View Post
This may have been mentioned and I may have missed it but why not just convert the tranny to a manual valve body somehow and skip the computer stuff? Yes a little annoying to do all the shifting but race car. I had a Nova set up that way.
I drive it every day, so I want it to shift like a stock car.

Funny enough, the output shaft is considerably bigger on the auto vs 6 speed, and so is the input shaft. We will see how it goes.

Leafy, yeah the stock trans will surely slip or break, it's going to be the new weak link.
patsmx5 is offline   Reply With Quote
Old 10-08-2016, 03:02 AM   #774
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Also, I haven't made any progress on the wiring today, but I did fab up a sweet PWM fan controller and got that tested. Gotta build it for on-the-car quality and add a second circuit for second fan as well, but I can command a fan duty from 10% to 100% and it does it. Very slick and should save some drain on the electrical for the times when I don't need as much fan. Also can soft start fans so no more harsh insta-loading from a pair of 40A fans turning on.
patsmx5 is offline   Reply With Quote
Old 10-08-2016, 03:13 AM   #775
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,805
Total Cats: 931
Default

Why not just use megasquirt PWM outputs?
aidandj is offline   Reply With Quote
Old 10-08-2016, 03:43 AM   #776
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Quote:
Originally Posted by aidandj View Post
Why not just use megasquirt PWM outputs?
Does MS do fan PWM control? If it does I didn't know it did that. I want to set it to say

< 185, fan off
at 186*F, PWM = 10%
at 195*F, PWM = 100%

And it interpolate between 186-195*F or whatever I decide the range to be.
patsmx5 is offline   Reply With Quote
Old 10-08-2016, 03:48 AM   #777
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,805
Total Cats: 931
Default

Just briefly checked on my phone.

PWM output. With a table on 2 axis. Rpm and coolant. Z is PWM.

So you have a ton of options.

You would probably need a solid state relay or something.

Could be cool.

I can dig more on the computer if you are interested
aidandj is offline   Reply With Quote
Old 10-08-2016, 03:55 AM   #778
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

I see, that's interesting. It would do 90% of what I want. I may just do that for now, that's simple enough. Thanks! I bought the components to deal with the electric motors already and that works, so should be straight forward to setup from here, just finalize that hardware and let MS do the PWM. Thanks again!


patsmx5 is offline   Reply With Quote
Old 10-08-2016, 03:56 AM   #779
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,805
Total Cats: 931
Default

Welcome. Good luck.
aidandj is offline   Reply With Quote
Old 10-10-2016, 10:12 PM   #780
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,955
Total Cats: 127
Default

Small update.

Got the vehicle wiring harness swapped over. Got the flex plate/converter/automatic/PPF/Driveshaft installed. Still need to install the trans cooler and lines, plug in the wires to the auto, vent for auto trans, dipstick, shifter and linkage, little stuff like that on trans. Big ticket items are in though.

Now I'm going to redo all my MS wiring, fan wiring, fuel pump wiring, and a few other things (warning lights and whatnot, little things). Hoping to get that done in the next few days and get the car put all back together. Also gotta redo my exhaust (it won't fit with the auto) and redo the mid section of my boost pipe where it goes around the transmission as well since the auto is a lot bigger than the manual.

The 7 day goal was a joke, looks like it's gonna be a 2 week adventure! Oh well, it's finally coming together now.
patsmx5 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Garrett BB CHRA pressure differential from loose V-Band housing cause oil leak Landrew Engine Performance 13 02-15-2016 05:12 PM
Whipple Virtual Dyno Results patsmx5 Supercharger Discussion 68 02-08-2016 06:44 PM
Help with my noise rear 90 Turbo Suspension, Brakes, Drivetrain 5 01-14-2016 09:49 PM
Turbo Miata & ODB2 eurojulien DIY Turbo Discussion 10 01-13-2016 09:59 AM
Cost Effective Upgrades?? andyvo DIY Turbo Discussion 23 01-06-2016 08:27 AM


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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 12:22 PM.