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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 12-21-2015, 11:08 AM   #21
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Wow, first post full of technical questions. You'll learn quick as long as you address things one at a time.

Right now reading these posts, it's a little distracting like a Jack Russell terrier with ADHD on speed. Get the motor in the car, use the stock wiring with a 90-93 MS3x and then hit the search button when you run into particular snags.
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Old 12-21-2015, 11:09 AM   #22
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Quote:
Originally Posted by OGWar View Post
I don't see any notices that people running MS run into issues with the Fab9 setup.
What have you been reading. Honestly, having run all of them, I'd recommend the Toyota Cops over the Fab9 coils. Now I've moved onto LSx coils and couldn't be happier but that's because Toyota COPS where incompatible with the VVT valve cover. Fab9 was just a band aid and I wasn't satisfied with an o-ring keeping the coil in place.
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Old 12-21-2015, 11:09 AM   #23
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Originally Posted by OGWar View Post
Looking at it, running a 90-93 COP conversion, like one from Fab9 tuning, eliminates all the coil pack swapping concern and is honestly a better option if I'm planning on north of 15-16 psi. Would you agree? I don't see any notices that people running MS run into issues with the Fab9 setup.
Run your stock 1.6 coils. You are over complicating things.
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Old 12-21-2015, 11:29 AM   #24
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Originally Posted by psyber_0ptix View Post
Wow, first post full of technical questions. You'll learn quick as long as you address things one at a time.

Right now reading these posts, it's a little distracting like a Jack Russell terrier with ADHD on speed. Get the motor in the car, use the stock wiring with a 90-93 MS3x and then hit the search button when you run into particular snags.
ADHD and speed? I've never gotten that one before haha.

Sorry, don't mean to be sporadic, just lots of things to think about. I'll keep a post to one question from now on. It's really the 1.6 coils onto a 1.8 motor that I should have focused on, that's currently where I'm at. I know I need a bracket to use the 1.6 coils. Is switching the signal wires to match the 1.8 plug order (per flyin miata's how-to) neccessary if using a standalone? Or is it really as simple as braineack stated, just get the 1.6 coil pack on the motor and keep the plug wires running to the same cylinders as they were on the 1.6 motor...forget about how the coils/wires were orientated on the 1.8 altogether.
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Old 12-21-2015, 11:37 AM   #25
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Right now reading these posts, it's a little distracting like a Jack Russell terrier with ADHD on speed.
Heh, speed is actually what they use to treat ADHD. A Jack Russell terrier with ADHD on speed would be... A Jack Russell terrier.

--Ian
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Old 12-21-2015, 11:41 AM   #26
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Heh, speed is actually what they use to treat ADHD. A Jack Russell terrier with ADHD on speed would be... A Jack Russell terrier.

--Ian
Learned something else new.

[grabbing coat to head to local "pharmacist"]
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Old 12-21-2015, 03:05 PM   #27
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Quote:
Originally Posted by OGWar View Post
ADHD and speed? I've never gotten that one before haha.

Sorry, don't mean to be sporadic, just lots of things to think about. I'll keep a post to one question from now on. It's really the 1.6 coils onto a 1.8 motor that I should have focused on, that's currently where I'm at. I know I need a bracket to use the 1.6 coils. Is switching the signal wires to match the 1.8 plug order (per flyin miata's how-to) neccessary if using a standalone? Or is it really as simple as braineack stated, just get the 1.6 coil pack on the motor and keep the plug wires running to the same cylinders as they were on the 1.6 motor...forget about how the coils/wires were orientated on the 1.8 altogether.
Just transfer the stuff from the 1.6 to the 1.8. Electronics don't give a **** about piston bore and slightly longer block when everything else runs the same. wire in your tps and come back when you have real problems. Also don't bother with the pencil coils from fab9. If you're having trouble figuring out the engine swap, don't make it more complicated than it is.


I'm not a dog owner or user of ADHD meds, I was grabbing at the stars.
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Old 12-21-2015, 03:26 PM   #28
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Quote:
Originally Posted by psyber_0ptix View Post
Just transfer the stuff from the 1.6 to the 1.8. Electronics don't give a **** about piston bore and slightly longer block when everything else runs the same. wire in your tps and come back when you have real problems. Also don't bother with the pencil coils from fab9. If you're having trouble figuring out the engine swap, don't make it more complicated than it is.


I'm not a dog owner or user of ADHD meds, I was grabbing at the stars.
I didn't mention piston bore or block length. I know electronics don't care about that stuff.

But a 1.8 vtps is 4 wire, whereas a 1.6 pigtail and tps is 3. I can find how to hook the 1.8 pigtail to the 1.6, just didn't know if there was another step on the megasquirt end where the harness plugs into the ms box itself or if it was internal. Everything I've found regarding this issue isn't clear. Just looking for advice from someone who's done the swap and used the 1.8L vtps with a mspnp2 setup is all.

For the coils, I think I got my answer. Use the 1.6 coils and don't worry about switching the signal wires to match the 1.8 coils. Use spark wire->cylinder orientation same as the 1.6
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Old 12-21-2015, 03:47 PM   #29
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I didn't mention piston bore or block length. I know electronics don't care about that stuff.
What's the physical difference of the 1.6L and 1.8L motors? Why would you need to change anything form the harness/computer side?

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I didn't mention piston bore or block length. I
But a 1.8 vtps is 4 wire, whereas a 1.6 pigtail and tps is 3.
Try running an NB throttle body. 3 wires just like the 1.6

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Originally Posted by OGWar View Post
For the coils, I think I got my answer. Use the 1.6 coils and don't worry about switching the signal wires to match the 1.8 coils. Use spark wire->cylinder orientation same as the 1.6
bingo
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Old 12-21-2015, 03:49 PM   #30
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I even have an NB throttle body I would sell you, just got a spare. (you would have to source your own TPS, this one is toast)
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Old 12-21-2015, 03:57 PM   #31
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Thank you for the info.

Here's the link to what I was reading about splicing the 4 wire from a 94-97 to the 3 wire from my stock harness. The 4th red wire on the 94-97 tail goes unused. They reference changes made on the megasquirt side for the DIY units, which is what caused me confusion.

http://www.mx5nutz.com/forum/index.php?showtopic=75646

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I even have an NB throttle body I would sell you, just got a spare. (you would have to source your own TPS, this one is toast)
I'll have to look into that. I'm honestly not sure what's different about an nb throttle body vs a 1.8 na. Without a working 3 wire vtps on it anyways, it would only be 1/2 the equation.

Really, everyone, I appreciate the feedback. It helps!
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Old 12-21-2015, 07:12 PM   #32
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Quote:
Originally Posted by OGWar View Post
Thank you for the info.

Here's the link to what I was reading about splicing the 4 wire from a 94-97 to the 3 wire from my stock harness. The 4th red wire on the 94-97 tail goes unused. They reference changes made on the megasquirt side for the DIY units, which is what caused me confusion.

Wiring Up An Auto Vtps - Forced Induction & N/A Power Mods - MX5Nutz Forum



I'll have to look into that. I'm honestly not sure what's different about an nb throttle body vs a 1.8 na. Without a working 3 wire vtps on it anyways, it would only be 1/2 the equation.

Really, everyone, I appreciate the feedback. It helps!
The NB throttle body has the IAC built in so you don't have to plumb a hose to get air, the NA one you need to run a hose to the intake tube for air. The NA 4 wire TPS can be wired with just the 3 wires same as the NB to work with a MS.
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Old 12-21-2015, 09:14 PM   #33
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The NB throttle body has the IAC built in so you don't have to plumb a hose to get air, the NA one you need to run a hose to the intake tube for air. The NA 4 wire TPS can be wired with just the 3 wires same as the NB to work with a MS.
Not having to run a separate hose to the intake tube would be a nice option.

I was looking through the gen2 manual, there appears to be more than just splicing the 4wire vtps to the 3 wire pigtail of the 1.6 harness, but it lays it out pretty clear about what you need to do to make it work.

the vtps on the NA 1.8l is not a direct fit onto an NB throttle body I'd imagine, so i'd need to find a tb/vtps combo from an NB.
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Old 12-21-2015, 09:34 PM   #34
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Quote:
Originally Posted by OGWar View Post
Not having to run a separate hose to the intake tube would be a nice option.

I was looking through the gen2 manual, there appears to be more than just splicing the 4wire vtps to the 3 wire pigtail of the 1.6 harness, but it lays it out pretty clear about what you need to do to make it work.

the vtps on the NA 1.8l is not a direct fit onto an NB throttle body I'd imagine, so i'd need to find a tb/vtps combo from an NB.
All 1.8 TB have a VTPS, we just call them a normal TPS. Both wire into the MS the same way. You would cut off the plug on your 1.6 harness, and then just wire the the new 1.8 plug to the existing wiring harness. There is one wire for power, one wire for ground, then a signal wire back to the ecu. Then at the ECU side for the patch harness you would just wire in the signal wire to the idle wire on the MSPNP2.

I would also say to go buy a MS3X now and skip the whole MS2 line. For a quick comparison, the MS2 platform is like buying a xbox360/playstation3 while the MS3 platform is like buying a XBone/playstation4. Both will run your car, but the MS3 is the one that is still getting developed, with occasional back ports to MS2 if they have time to do it.
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