The Definitive "VVT swap into 90-97 chassis" Megathread. - Page 11 - Miata Turbo Forum -Boost cars, acquire cats.

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Old 08-19-2015, 09:25 AM   #201
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Does your MS have ignitors in it? If so do not attempt to connect the 1.6 ignitor!!!
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Old 08-19-2015, 09:38 AM   #202
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Is there any way to check/test my MS3 to see if it has them?
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Old 08-19-2015, 11:07 AM   #203
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Open the case, you'll either find two BIP373 inside (for the wasted spark outputs) or not. If you have them do not use this ECU in a miata, you have to modify it.
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Old 08-19-2015, 11:24 AM   #204
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i'll check that, but since it was made for a miata i dont think it has them ..
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Old 08-22-2015, 03:07 PM   #205
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So i managed to fix everything, it was the inverted spark setting in MS3.
Now i have rather strange problem, i get the spark when i turn the key, but no spark when i try to start it, also MS3 is sating that there is "no rpm sync". Any ideas on what could it be?
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Old 08-22-2015, 03:18 PM   #206
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Kristjan, start your own thread for the issues with your specific car. This thread is for general questions about the swap, not specific issues with specific cars
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Old 08-22-2015, 03:54 PM   #207
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I apologise, starting my own
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Old 08-29-2015, 11:00 PM   #208
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Doing a swap this weekend, and I need a little help... what is sensor A? Knock sensor?

B looks like oil pressure? At least it looks similar to something on my NA8 motor.

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The Definitive "VVT swap into 90-97 chassis" Megathread.-img_1076.jpg  
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Old 08-29-2015, 11:07 PM   #209
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A is the knock sensor and B is an oil presure switch, it is only on and off type switch.
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Old 08-29-2015, 11:25 PM   #210
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Quote:
Originally Posted by HHammerly View Post
A is the knock sensor and B is an oil presure switch, it is only on and off type switch.
sweet- thanks!

it's going into a 97, so I only had an on/off oil pressure switch anyways.
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Old 09-11-2015, 01:35 AM   #211
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Default 94-97 FPR, 99 Fuel Rail, and VVT

This is my first reply so bare with me...


My goal is 01 VVT motor swap + EUDM square top manifold + mazdaspeed 6-speed tranny into 95 NA. (Also 94 torsen lsd diff, but am on the fence about the gear ratio)


This was written at the beginning of the thread and I have been trying to prove it right.


"Fuel system:
Use a 1999-2000 fuel rail and a 1990-1993 fuel pressure regulator. No other combination of OEM parts will work. The 90-93 fuel rails are too short, the 94-97 rails have incorrect mounting tabs, and the 01-05 rail places the fuel pressure regulator in a spot which interferes with the cylinder head. The 94-97 FPR places the pressure reference in a spot which interferes with the cylinder head and the 99-05 regulators do not have a return line."


Is this only true when retaining the VTCS manifold? I will be using a 99 fuel rail and EUDM square top, and was told from an outside source the 94 FPR should work, so I gave it a try...


The Definitive "VVT swap into 90-97 chassis" Megathread.-img_4536.jpg

The Definitive "VVT swap into 90-97 chassis" Megathread.-img_4538.jpg


It looks like the clearance won't be an issue.. Is there something I am missing or will I have issues with clearance later in the process? The only thing I can think of is I used the 01 injector harness for a fitment test. Am I going to use the 95 injector harness and is this going to cause a clearance issue??


Thanks!
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Old 09-11-2015, 03:39 AM   #212
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'99 EUDM fuel rail should be regulated. Mine was! In that case you won't be needing the FPR

Just bend the return pipe a little, in order to clear the engine head.
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Old 09-13-2015, 10:29 PM   #213
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Quote:
Originally Posted by Lindblad View Post
It looks like the clearance won't be an issue.. Is there something I am missing or will I have issues with clearance later in the process?
The vaccum reference port fouls the intake manifold. I guess you could run without the reference port hooked up, though. If you want vacuum reference, you need the 90-93 USDM regulator or the 99-00 EUDM/JDM return regulator.
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Old 09-14-2015, 10:19 AM   #214
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I made a 97 FPR work by bending stuff... Clearance is tight, but it can work. I have 2001 motor, Squaretop, 99 fuel rail and 97 FPR in a 97 chassis.
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Old 09-14-2015, 11:21 AM   #215
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My car is running/driving nicely. Pretty happy with how easy this was for my first motor swap.


Just FYI for those swapping NB2 motors into NA's:
I did ZERO wiring to put this motor in the car... Made some ghetto mounts for my coilpacks, trimmed the plug wires and am running the old style CAS for now. I'm not running VVT until I get motivated to spend money on VVT tuner thing and do some wiring. I made a plug on a lathe at work to cap the new cam-sensor hole for the temporary.

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Old 09-14-2015, 11:43 AM   #216
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You need to do some wiring if you have an NA6, at least to extend the CAS wires to the new position. Otherwise it's pretty much as you say!
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Old 09-15-2015, 04:07 PM   #217
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Quote:
Originally Posted by dcamp2 View Post
I made a 97 FPR work by bending stuff... Clearance is tight, but it can work. I have 2001 motor, Squaretop, 99 fuel rail and 97 FPR in a 97 chassis.
If you don't mind can you clarify what "stuff" you had to bend? Thanks!
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Old 09-15-2015, 04:14 PM   #218
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Quote:
Originally Posted by Savington View Post
The vaccum reference port fouls the intake manifold. I guess you could run without the reference port hooked up, though. If you want vacuum reference, you need the 90-93 USDM regulator or the 99-00 EUDM/JDM return regulator.
Thank you for the reply. Can you give me a little more detail on how the vacuum reference port fouls the intake manifold? I will be swapping all of the coolant sensors/oil pressure sender and injector harness shortly. I am sure I will come across the challenges on the way but it helps to get some type of understanding before hand. if critical I have no problems looking for a 90-93 FPR.
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Old 09-15-2015, 04:24 PM   #219
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Quote:
Originally Posted by Lindblad View Post
Thank you for the reply. Can you give me a little more detail on how the vacuum reference port fouls the intake manifold?
Uh.. not really? The reference port basically touches the intake manifold, and you can't slip a vacuum line onto it without badly kinking that line. If you need more detail, you'll probably have to assemble it yourself and see what I mean - I'm not sure how to describe it any better than "it doesn't fit, you can't do it"

e: Post 86 in this thread discusses this topic as well.
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Old 09-15-2015, 04:28 PM   #220
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Quote:
Originally Posted by Lindblad View Post
If you don't mind can you clarify what "stuff" you had to bend? Thanks!
entry/exit to fuel rail, nipples on fpr, grind IM, etc.

Just put it together and (gently) bend stuff to fit. It will make sense when you have it all in front of you.
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