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Old 01-15-2013, 12:20 AM   #1
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Default A treasure trove of Noob Questions

Hey guys new to the forum and new to ecu tuning, I have loads of experience with carb tuning but I'm not confident at all with tuning an ecu since I have never done it before. So to start I have a 99 miata nb and I'm planning on putting a turbo on it so I'm going to order a prebuilt megasquirt ms2 pnp from diyautotune which Im sure I could do it cheaper but I want it where I can just easily buy it and not have to deal with any hassles of building something. I figure I want to learn to use and be comfortable with the megasquirt before I turbo the car so I'm not stuck with a car that doesnt start etc. So my questions are where do I even start with how to use the megasquirt, what should I pay attention to, how hard is it going to be to get it to run like stock (rev changes with steering, a/c, etc). Which tuning program should I use, Should I get someone to tune it for me even though I rather learn myself. How hard is it to install and do I need any sensors (I'm very mechanically inclined to the point of building and fabricating hot rods and various motorcycle projects so nothing in my opinion is to hard but I still want an idea), what all do I need (harnesses etc) Also is there a better place to get the megasquirt (I think I saw someone built them or something like that for cheap dont quote me on this) or should I go with a different ecu even though I'd like to stay under $900. I guess in short for right now I just need the basics so that I can get the car started and able to drive it untill I am able to fine tune it, also this car is my DD

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Old 01-15-2013, 01:38 AM   #2
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Read this. All of it... or something: Megasquirt MSEXTRA Manual Index

You'll start to understand, or get bored/give up. It doesn't matter much which.

Once you've done some research, come back & ask specific questions about trouble you're having.
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Old 01-15-2013, 02:24 AM   #3
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Old 01-15-2013, 05:22 AM   #4
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IF you have any soldering skills at all:
90-97 MS3 with MS3X | My Westfield MX5 90-97 MS3 with MS3X | & Megasquirt site

obviously you'd have to find a diagram or just make one for the stock 99 harness if you want plug and play, but it's not that hard. I had minimal experience with megasquirts and I've built 3 ms3x's from this guide. Thank you FRANK

or go to Braineack, who has a sticky in the for sale/trade section of this forum. Have him build you a ms3x. It's worlds better diypnp, ms1, ms2. Just do it
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Old 01-15-2013, 12:06 PM   #5
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WOW wall of text. Use paragraphs dude.

Dann
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Old 01-15-2013, 12:21 PM   #6
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tl;dr
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Old 01-15-2013, 12:28 PM   #7
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Quote:
Originally Posted by jimmyhat View Post
also this car is my DD
Do you have a backup? I would think this is step #1. Don't turbo your DD unless you have something else to drive.
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Old 01-15-2013, 12:44 PM   #8
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*****,

I see you have been saving up your questions for awhile

The best deal going on a MegaSquirt system is from a really nice guy on this forum named Dimitris (goes by Reverent on here). His MS3 Basic will be a plug in unit that will replace your stock ECU and plug right into the stock harness. It is the latest technology at an excellent price and will come with a base map he will customize for whatever larger size injectors you decide on (you will need larger injectors).

Here's a link to the introduction thread for the MS3 Basic.

If you get the program TunerStudio (free online) and then pay a few bucks for the upgraded version, it will autotune your fueling map for your particular setup. You will learn to tinker with some of the setting regarding idle and such within TunerStudio as well. You won't need a tuner.

The guys weren't being mean when they were indicating that you should read some, either, because there is much to learn. I never read the msextra info linked in the first post, just threads and discussions on this forum. There is a great deal of good info on this forum.

I was a carburetor/distributor musclecar guy before starting into all of this, so I understand it can be daunting. I told myself I needed to learn this technology to be able to take advantage of it. One day I'll turbocharge the old '68 GTO convertible with MegaSquirt technology when money gets better.
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Old 01-15-2013, 12:48 PM   #9
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Quote:
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Do you have a backup? I would think this is step #1. Don't turbo your DD unless you have something else to drive.
Oh crap! I missed that one. Yeah, I wouldn't tinker with a DD without a backup ride. The turbo system install will likely involve some downtime due to small items that always need to be sourced during the install. For me it was clamps, silicone elbows, etc., that never seemed to be the right part for where I needed it to go.
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Old 01-15-2013, 02:08 PM   #10
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Thanks six shooter yeah I have a few other cars to drive I just added the part about it being my dd cause I would like to retain the ability of using it everyday when everything is all said and done. I have a 70 nova ss with a carbed lsx motor because ecu tuning always seemed like witchcraft but like you said we have to learn it nowadays.
I'm going to try to get a hold of Dimitris then and I guess just start reading the manuals and go from there. I know my questions were general and showed i didnt do much research I just waant sure what direction I needed to go in.
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Old 01-15-2013, 02:29 PM   #11
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Also since I'm going with bigger injectors when I turbo it should I put them in with the ecu even though it wil be na for about a month? Also which injectors (size and brand) should I go with if I'm aiming for 225 whp. I'm going to go with the fm2 turbo kit and I know their hydra kit comes with 700cc injectors and I was going to do the same but I just want to make sure thats the right direction for me.
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Old 01-15-2013, 02:38 PM   #12
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Old 01-15-2013, 02:47 PM   #13
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You should install injectors with your ECU even though you will be NA. As to which, that's where you are going to have to start reading. Most members recommend FIC, ID, or DW injectors. In general, you get what you pay for. You can get some 550cc RX7 injectors for ~$60, but they are the EV1 design and very very old.

I do have 2 suggestions though. 1) don't ever use the search bar at the top of the page. Do 'advanced search' and make sure to select 'sort by relevance' in the sorting options. The other option is to search google with site:miataturbo.net <your thing you are searching for>.

Start reading, this **** gets interesting.
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Old 01-15-2013, 02:58 PM   #14
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yeah, might as well tune in vacuum on larger injectors now, then all you'll have to tune is boost fuel.
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Old 01-15-2013, 05:48 PM   #15
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ok nice, I guess I'll go with the 700cc dw's since that's what Fm is using for the set up. Unless anyone has a better option to go with. Also thanks Steve I was wondering about that search bar cause I used it earlier and it didn't seem to be very good
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Old 01-15-2013, 05:52 PM   #16
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Quote:
Originally Posted by jimmyhat View Post
ok nice, I guess I'll go with the 700cc dw's since that's what Fm is using for the set up. Unless anyone has a better option to go with. Also thanks Steve I was wondering about that search bar cause I used it earlier and it didn't seem to be very good
Go with 725cc Injector Dynamic injectors. ID > DW. I have ran both dw1000's and ID1000's and the ID are by a long shot better then the DW. The ID's cost a bit more, but are worth every penny.
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Old 01-15-2013, 06:28 PM   #17
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Ok then perhaps ID725s injectors which adapters would you suggest using for the injectors? DIY solder or the pnp adapter? I'm trying to make this as painless as possible but I will choose performance and reliablility over anything. Also I saw the megasquirt can handle boost control should I use it or should I look elsewhere for a boost controller?
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Old 01-15-2013, 06:40 PM   #18
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The EBC that the megasquirt can do will spool better than an MBC or wastegate only. I would definitely use it.
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Old 01-15-2013, 06:56 PM   #19
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Order for a painless, staged build:

1. Install your MS, remove you MAF/AFM and install WBO2. A base tune should get you going quickly. Drive around for awhile and learn the basics. This is your steepest wall and once you've climbed it you'll gain a lot of confidence.
2. Install the larger injectors, adjust REQ FUEL and retune fuel for the larger injectors. 1 and 2 could be combined, but if you do you'll likely be starting with a rougher basemap.
3. Comfortable? Good. Install turbo. If you're a hotrodder, nothing new here. Take great pains to install reliable components, perform a quality build and control heat.

And you're off. With the power levels you mentioned, you can have a very reliable DD.
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Old 01-15-2013, 07:13 PM   #20
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Thanks Rick that's what it seems like I'm going to do since I feel like the best way I'm going to learn is just by reading a lot and more than anything playing with it in my car. I think its kind of funny that the turbo install itself I'm not even worried about but the ecu has me dreading this project a little. Also another question I like the features and everything of the Innovative wideband controller/gauge. Does anyone have anything against it? I was thinking about an autometer gauge kit because I have a lot of experience with their stuff but the innovative's price has me at $200 compared to autometer's $300 does anyone have another suggestion? Or is the innovative all around pretty good
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