irex

Hey Folks!

I'm very close to wrapping up the install of a Rotrex C30-94 on my 01 Miata, and was hoping that I could get your advice on my base map before I start it up and start running. I plan to eventually spend some time at the dyno to get everything perfect, but want to do as much as possible DIY on the street first.

Car Details:

• 2001 Mazda Miata (1.8 VVT)
• C30-94 Rotrex Supercharger (modified TDR kit)
• Deatschwerks (DW) 700cc Injectors
• MS3Pro PNP from diyautotune

Before beginning the supercharger installation, I spent a couple of months learning some basic tuning stuff on the car naturally aspirated and have a solid tune to start with, but am wanting to make sure I'm not making any big mistakes now that boost is getting added into the equation. Basically, I want to get a good base tune that is safe enough to start tuning from.

With that in mind, I have 4 questions:

1) I've adjusted req_fuel for the injector size, and then the deadtime (just A(ms)) based on starting the car pre-supercharger and randomly guessing. I have the specific flow data from DW (attached), but have no idea how to get this into Tuner Studio. Can anyone help?


2) I've interpolated a new AFR table based on some other threads on MT. Any concerns?


3) I've added some rows to my Fuel VE and then interpolated based on some other rotrex tables. Basically, I took my base NA tune, added max 25% more fuel at peak load and interpolated in between. If I turn on autotune to easy, does this seem reasonable? Notice any scary parts of the map?


4)I just interpolated the boost rows of my timing table from what I had, corrected based on some other maps and smoothed out the boost sections. Does this seem in ballpark?


Lastly, anything else I should keep in mind before firing up the car?

If anyone has specific advice (or if I'm way off base), feel free to PM me - I'd be happy to chat about making it worth an expert's while to help me get me started in a right (or at least safe) direction.

You can see this current tune file here (Tune for SC v1.msq): https://drive.google.com/open?id=1xz...R3p07sRonc3IYZ

Cheers, Mike

thorzwar

I'm literally about to do the same thing. Only difference is mine is an NB1 (no VVT) and I'm running Flow Force 640 injectors. How did your method of scaling the tables turn out going from naturally aspirated to boosted with the c30-94? Anything you would have done differently or had to drastically change after the fact?

irex

Nope, realistically speaking it just took a bunch of time tuning. When I scaled the tables I made sure that everything was on the rich side of things and just let autotune take it from there. I did have to adjust the max limits that autotune could do corrections, but from there it all just kinda...worked. I did end up swapping out my timing tables for the ones FM uses on their turbo cars, and my P&ID settings had to get fiddled with to get closed loop really work well with boost, but it really wasn't too big of a deal!

If you have questions or concerns, I'm no expert, but let me know and I might remember something that could help you out!

Jerryg

I've been running the same setup for about a year now and due to a faulty knock sensor and to much timing I burned up some pistons!!!!! I would be happy to share the tune that messed up my pistons and the very conservative one I'm running now until I get the knock sensor working. I'll look at your tune tonight and compare it to mine. Are you running stock pistons and CR? I built my engine with 84mm pistons and 9.0 CR so there may be some differences.

Jerryg

First of all I AM NOT AN EXPERT, hell I burned up a set of pistons doing something dumb! but here are my comments on your tune.

1. Injector dead-time - I had to set mine to 1.62 to to prevent what looked like fuel cut on coasting down (I have the same injectors as you)
2. Use EGO authority table and move active below % to 210
3. You need to enable knock sensor and use knock retard. This is very important - Ask me how I Know
4. In closed-loop idle settings i recommend you use, "use initial value table"
5. VE table could use some smoothing
6. AFR table looks good but i had to go down to 13.8 in the idle range to get a smooth idle
7. Timing table looks good to me.

If you have any specific question don't hesitate to PM me. FYI my last dyno run was 252 RWH at 17 psi boost, with a conservative tune.

thorzwar

Now that I have most of the engine bay back together I plan on doing a test fire this weekend. Where did you find the FM timing tables?

boileralum

iTrader: (8)

Hey irex, I have a very similar setup (FF640s vs DW700s), could you share your current msq? You can email it to boileralum at gmail. Thanks!