diypnp fuel management question (noob)
 

i have a 90 miata 1.6 and recently came across a 1.8 with extremely low miles

i do intend on turboing that motor before it goes in
i was first thinking about doing a voodoo 2 and then upgrading further along the way. but after comparing that to begi s1 im thinking i would rather go with that. and of course i could use the voodoo box with it. but since i may like to later on go with a complete ecu replacement and the diypnp is roughly the same cost im thinking it might be a better choice to go ahead and get that now. am i wrong? and i have read on miataturbo.net that its a good idea to get the ecu and learn how to tune before you get the turbo.

i have read how the voodoo box works by extending the signal to the stock injectors therefore maxing out their potential to support 8 psi

so my question is will the ms diypnp also be able to make the stock injectors support 8 psi? or will i need bigger injectors?

i know the question may sound dumb but i would really like to know for sure before i dump $400 into it

thanks
jared

Yes. Go ahead and get the MegaSquirt. I did my MS and turbo at the same time. I regretted it, slightly. Since I have been working with MS since around '05-'06 I was already familiar with it. The only thing I regretted was that I was tuning my own car and not one a friend's car, lol :p I had no problem going ballz deep with some of the E30's I used to help tune. They are tanks compared to the miata and that is saying a lot.

With the new software available road tuning is made easy. Even after using MegaTune forever I still made the switch to Tuner Studio. It's nice, but I miss the old skool stuff every once in a while. In fact, I still have a friend that tunes with MegaTune on MS1 using a EGT and nothing else :retard: No issues yet, even after running 6's in the 1/8th @ 100+mph

Anyway, yes. Stock injectors are good to around 6-8psi depending on the model of injector. I know some 1.8's had different sizes, I'm not sure what they are though. When I first got my car running I had issues with one of my RC's and ended up using my stock 1.6 injectors @ 6-7psi. I had no issues.

Good luck.

Ok I'm am not a all knowing turbo person so you'll need to talk to someone who knows way more then me but with that being said my question to you is, when your going turbo do you REALY wana "MAX OUT" anything. When your going turbo you don't wana go cheapo because that's how people blow there engine. Now for what you wana do someone who knows way more might come an say you'll be fine. All I'm saying is, my advice is when your going turbo cheap is not allways the best way to go.

i understand your concern and feel the same way
heck im lookin at a begi kit with a garret turbo. im just wanting to upgrade along the way and wondering if the megasquirt would have been able to do the same with the injectors as the proven voodoo. which it seems it can

thanks for the info

I would go with some version of the Megasquirt, without a doubt. More flexibility and room to expand if you want. More controllable too. Plus way more features. There's a few guys that will build them for you here if you don't feel comfortable doing it too.

The stock tan tops should do 8 PSI but they'll be close to or at their limit. You could always upgrade to a larger injector later with the Megasquirt.

Here's the DIY turbo FAQ at MT.net. It has some good info in it.

http://www.miataturbo.net/showthread.php?t=4288

so long as there are some clear, easy to understand instructions than i will feel comfortable assembling it myself. and as for the soldering, if i feel i cant do it (which i hear is pretty easy) my mom used to solder circuit boards for crown amplifiers for a few years. ill just get her to do it. just so long as the instructions are clear as to where everything goes.

thanks

If you get a kit from DIYAutotune it is. Everything organized and well packaged. All the packages are marked with component part numbers and corresponding part locations on the board. They even tell you what the lead spacing to use with the lead bending tool so it fits in the board. It's a very well thought out kit.

Here's the Important Megasquirt threads at MiataTurbo.net:
The first one is how to build your own.

http://www.miataturbo.net/showthread.php?t=17498

And the MiatatuboWiki:

http://miataturbo.wikidot.com/

Those should answer any questions you may have.

Sorry I just realized you were referring to a DIYPNP. I'm not really familiar with the DIYPNP. I started with a MS1 and upgraded to a MS2. Someone will have to chime in on how difficult the DIYPNP build is.

My build was my first electronics project and it was a little tricky but it got a little easier with time. I'm no wizard at it but I have a pretty good grasp on it. It's in my daily driver and has never left me stranded so I guess I got it right.

MiataTurbo.net was a big help. I probably wouldn't have been able to get it together without them guys.

Here's the documentation on it to give you a heads up on what you might be in for.

http://www.diyautotune.com/diypnp/docs.html

nope. not wrong, get it now, dont get the voodoo box.
great idea.

yes, but it can also control larger injectors, which can support all the fuel you'll need.

if it were me, I'd do the diypnp over the voodoo box hands down.

+1 on larger injectors for boosted apps. Too much fuel isn't good but not enough = BANG! Any of the MegaSquirts will be able to handle just about any injector you can install to it's fullest.

Another +1 on the DIYAutoTune suggestion. Great folks that will bend over backwards to help you.

The gospel according to Brain. He speaketh the truth.

thanks for the good info everyone.
and yeah i will later on intend on getting bigger injectors
just wanting to run the stock ones til i get the bigger ones
ill probably be getting the ms in the coming months
however it will probably be a year or two before i get the turbo

and thanks a bunch for the diyautotune suggestion
i never even heard of them before thanks for pointing them out

im guessing this is braineack from mt.net?

ok so i bought it
this bad boy right here
http://www.diyautotune.com/catalog/d...kit-p-384.html
as well as a gm fast reacting intake air temp sensor kit
as you may suspect i took advantage of the recent facebook deal

I have a few initial questions and will likely have more later.

I should probably mention that I am installing this on a stock 1990 1.6 with no mods except of course i will be removing the afm. I am in the process of piecing together a budget turbo kit for the 1.6 since I came across a deal on a td04 and mani. In addition to the ait i will of course be hooking up a wideband 02 before the turbo install. Later on I will be adding a knock sensor http://www.viatrack.ca/ . I am setting up a budget 5-6 psi system on the 1.6 as a learning experience while I save up for a s3 or s4 for my complete 16k miles 1.8 drivetrain sitting in the corner of my garage.

1. The connector board where the wiring harness plugs in at, I cant find and info on how to jumper the wires. Is this just gonna be something where I familiarize myself with the board by assembling it then use the diagrams from my haynes to figure out what wires go where? Or has someone posted somewhere how to jumper the connector to the main board?

2. I know i found some installation instructions somewhere and I think they were by Brain. I know that this http://www.miataturbo.net/showthread.php?t=13676 is not what it is that I am talking about. What I had found was not in forum format and I remember it saying something about removing a fuel pump fuse for the 1.6. I just spent ALOT of time searching for what I had found before and just cant find it. Can someone link me to it please?

3. I'm hoping I can load up the base maps and safely use those as is on my naturally aspirated application until I install the turbo with the wideband.

If someone can help me out and point me in the right direction I would really appreciate it.

Thanks
Jared

That knock sensor is garbage. I'll give you my old one if you really want it.

Also are you talking about this http://www.miataturbo.net/showpost.p...01&postcount=4

There is also a PDF that I think was made by brain (I think) with the same info... You might be talking about that.

Yeah that pdf must be what im talking about cuz that link/thread def isnt