GB Fully Assembled Miata Dwell Reducer Boards
 

Coil on Plug users... This board eliminates the chance of over heating and damaging your Toyota C.O.P. units by reducing the stock dwell by 1.5ms. These will work on both the 1.8L motors and the 1.6L motors.

Cost will be at:

QTY 25 $45 a piece
QTY 20 $53.75 a piece
QTY 15 $70 a piece
QTY 10 $102.5 a piece

The problem is we must run 25 units as a minimum order so the more we can split these cost between people the cheaper it gets.

These boards are fully assembled and include 6 inch wire leads on each connection. All you have to do is wire it in. If you sign on and we don't make it to an acceptable price no hard feelings and no sticking it to you. This is the best price I can offer, I am once again making about 0 bucks on the deal.

i'm in

I'm in

I'm in. Did keinayo contact you?

I'm in.

In

1. flippy02
2. trito
3. Rafa
4. Fra66L
5. scottv

I'm in.

In as well
 

I'm in as well.

bump for update

Cyee who is going to be soldering the boards said he may consider doing a smaller run, so if we don't get the full 25 he may still help us out...

That's cuz I'm a nice guy. :)

The more people in, the cheaper it will be for the collective whole. I'm working with Travis to see what we can work out for pricing. Details to follow!

updates!

Alright guys updates!

Chris was kind enough to reqoute and the populated boards can be had for $44.23 shipped at minimum order of 10. So lets get some people into this buy and make it happen.

Count me in for sure! :bigtu:

so...
1. flippy02
2. trito
3. Rafa
4. Fra66L
5. scottv
6. Jayc72
7. Alden77
8.
9.
10.

Anyone put a link in any of the other COP threads yet?

Cheers,
T

I'm interested in buying one , but have a question and really don't have the time to search and wade through all the not so relative info, so since you're sorta like a vendor maybe you could address how this would work with a link ecu setup. I'm 99% sure the link mimics the stock ecu as far as dwell times are concerned. I think I remember reading that the stock dwell is in the area of 5ms. Your reduction of 1.5ms leaves dwell at 3.5ms. I thought I read that dwell should be something like 2.5ms while running. Any info would help me feel better about buying it. thanks

It would work the same as someone running a stock ECU with the Coil-On-Plug setup. Any reduction is better than no reduction in terms of the additional heat generated. You're in luck! I've computed values for making this Dwell reducer 1.6L ECU (and FM Link ECU) friendly.

If you require a 2.5ms reduction, make a note of that in this group buy.

FYI, I plan on using mine on a FM Link ECU as well.

Stock dwell should be 4.0ms on the 90-93 and 3.5 on the 94-97. The system that governs the board reduces to a set of differential eqautions whose solutions are always contained within a set or series (depending on the starting problem) of exponential functions. I never recieved the original governing eqautions, so i can't be sure to their exact output. What I do know is, is that these boards given a certain input will all reduce the output by approxiametely 1.5ms and bring the dwell into spec.

Y'all should pay me $5 royalty each :giggle:

hey Jason next time we have a meeting at In&Out I'll order you a side of frys =D

You can have the balance of what I've made so far. -400? :)

ok, put me down for one. I'l be using it with a link ecu 1.6L.

Just to confirm, I'm still in.

Jay

I suppose I should count myself in too....

Updated...

1. flippy02
2. trito
3. Rafa
4. Fra66L
5. scottv
6. Jayc72
7. Alden77
8. Mymiataflys
9. Cyee :)
10.

Put a few bumps in some Mnet threads also...

Cheers,
T

one more for purchases! yay! any news on completed boards, maybe pictures of completed board, and i don't remember any directions on exact hook ups on these boards,do they hook up just to the trigger wire? or do they hook up to power ground and trigger, maybe even the tach signal?

I'm still waiting for the last of the parts to arrive before I start assembling the dwell reducers.

i'm down. anything to keep the car running longer w/o changing parts lol. and 44$ isn't bad, how hard to wire it in exactly? and how would i set it up for the MSPNP?

you wouldn't need it if your running MS, another band-aid to something MS solved already

k nvm then lol

argh.. one more.. just one more... c'mon people.. you know you want one of these!

Wait, if I have MegaSquirt then I don't need this dwell reducer? I'm out if that's the case...

Flippy02,

You explain to this guy.. Then everyone who is remaining on the list will attack you for single-handedly sabotaging the group buy! :slap:

The short answer is that the MegaSquirt is capable of controlling the dwell times and as such, this device isn't needed for those who have ECU's that have user adjustable dwell time control (eg. Stock ECU or the FlyinMiata Link)

Oh, thanks...I just have this gut reaction to jump on any group buy that comes up...I need group buy rehab. so i'm out...pls take me off the list.

he lies! you need it!

Hey I may have forgotten to mention this but

THE TIMING CAPACITORS NEED TO BE COG or X7R for temperature stability.

Z5U and Y5V are some of the worst.

Updates?

I sent Chris the boards on thursday. He should be getting them soon. I'll put the button up for the buy as soon as I get power back at my house. We evidently have hurricanes in Indiana now.

10 of the PCB boards we're destroyed by the postal service. Make that 250$ I've lost to the mail now. Seems like all the profit they make they could ensure my package is going to get where its supposed to in one piece. I get to eat that. The next shipment will be sent to him sometime this week I think...

insure your packages!

Insurance still doesn't make the destroyed PC Boards good. It's still a hassle.

BAH.

I'm sending more boards to chris tomorrow. Hopefully we'll get this thing taken care of.

can't wait, looking forward to this

Guys, I've been trying to wade through info on both Miata.net and here about converting my '94 to a COP setup. I can not seem to find exactly what I need to accomplish this, and some of the information seems to contradict.
I thought I was going to need this board, but now I've read it isn't needed for the Link setup.
I would be very grateful if someone could post/ I/M /PM, etc. The comprehensive information needed to accomplish an upgrade from the factory coil setup to a cop system.
I am currently running a '94 model, Link EMS, FM II Turbo setup.

If I do indeed need the board, by all means, count me in.

Thanks for your help,

Errol

since you are using the link then yes you need this in order to operate the coils with the correct dwell time and prevent overheating them.

https://www.miataturbo.net/forum/pic...5&pictureid=98
https://www.miataturbo.net/forum/pic...5&pictureid=96
https://www.miataturbo.net/forum/pic...5&pictureid=97

YOU KNOW YOU WANT ONE. C'mon .. we need 10 for the Group Buy!

Looks nice chris! Those solder points look really good for how small they are.

Thanks! The wires still need to be attached, but I figured people were anxious to see that the product looked like, so I threw one together for pictures.

what size box should I be looking for to mount this in? Looks very good can't wait.

Board is 1.15X 2.38X.75 maybe a little deeper as I haven't measured it with components so the Z depth is a guess based on board size.

When will these be available to order? I'm ready to go.

I picked up a Hammond 1551KRBK box which the board friction fits into almost perfectly. Here's the link to it: http://www.hammondmfg.com/dwg9.htm

https://www.miataturbo.net/forum/pic...5&pictureid=99
https://www.miataturbo.net/forum/pic...&pictureid=100
https://www.miataturbo.net/forum/pic...&pictureid=101

That is a really tight fit. 1.1495X2.3680 is what I have on the calipers. I was going to put up a button today to buy it but I haven't heard back from chris on the go ahead yet.

As soon as I hear back from him giving the go ahead I'll put it up and we'll get these out.

<poke ;)

Hey! Watch where you're pointing that thing! ;)

I'm working on it on my spare time. I expect to have 5 done for 1.8L by this weekend.

I'm waiting for parts for 1.6L (5ms dwell OEM) and those will take a bit longer. How many 1.6L ones did we need?

I need a 1.6.

I'd buy unassembled if that helps.

Ok, I'm going to put up 2 buttons, we can get the 1.8L boards out almost immidiately. He's got 5 of those done. The 1.6L boards like he says he needs to order more parts for. So those might take a couple weeks to get to you.

I'll put the buttons up tomorrow on the website, and then send the info over to Chris so he knows how many of what he needs to order.

do it now!

I need a 1.6 since I'm running a 1.6 ecu. thanks

lol, flippy your halirious. Button is up make sure you pick the right one 1.8L or 1.6L/Link. They come with the protective box so you don't have to worry about that. Here is the link http://www.boundaryengineering.com/pcba.php