I just installed the DIYautotune EBC today and started tuning it. I was really excited, but that soon turned into disappointment. My target boost is 12PSI. If I actually tune for it in near steady state with 4th gear pulls, I will overboost like crazy in transients in lower gears. It's worse than an MBC, IMHO.

*sigh* When is MS going to get closed loop boost control?

 

you need to tune the cells better, you need to use 4th or 5th gear pulls to determine the RPM you need to start opening the valve at.

 

Problems solved.

 

I struggled with EBC for a year and a half. Switched 2 weeks ago to an MBC and I'm never looking back.

 

Sav, I am with you. I cannot seem to make it work either. I tried again this weekend to tune it to no avail. I did some 4th gear pulls from 2k, and the turbo actually spools slower with the EBC than with the MBC. I would change the spring in the waste gate, but I don't think that will solve the issue.

 

I built the EBC circuit and bought the solenoid, but after two years I've never gotten around to installing it. My TurboXS MBC works just beautifully.

Here's a brief fifth gear pull, going up the sunshine skyway bridge. The log starts at fully closed throttle, as I wanted a good look at the boost threshold in my particular setup.

 

I want a smaller turbo, I am convinced of that. I reach 188kpa at 4200.

I have a 42/.48 T3 that I can rebuild or I can get smaller 60/.48 T3. The one I have now is 60/.48 T3/4, and it is huge compared to the other T3's.

 

We're running open loop on our red test car without a variable TPS, and it works fairly well other than that it doesn't compensate for altitude. Keith G is working on an easier to tune closed loop code that we plan to test out when it's ready.

 

I dont have any problems....

 

How do you get yours to show up in Vac/PSI and not KPA?

 

Pick the option in MLV...

And BTW his shows MAP and Boost

 

Hmm... maybe OL EBC + no variable TPS + me = fail.

Where are you guys getting your EBC boost signal? Mine's plumbed at the vacuum nipple just after the throttle plate. Maybe that's too noisy a signal?

 

EBC sucks and everybody knows it. Get a MBC and dial it in and you'll be happy. T off your FPR line and use that to feed the MS it's vacuum supply and to feed the MBC.

 

Oh, never noticed it before. Good call.

 

Yeah, as much as I thought I'd hate it early on, the TD04H-15G has proved to be a very nice little unit. Insta-spool at low RPMs, and yet it still works ok at higher RPMs, putting about ~13psi without making so much heat that the intercooler melts. The exhaust system has a lot to do with it, I expect.

 

Well, I have a .42/.48 Garrett T3 that I need to find a turbine housing for. The housing is cracked in multiple places on the exhaust side. I would like to stay with the T3 since my manifold is obviously set up for the T3. The T3 flange will need to be redone though as the current T3/4 5 bolt pattern is larger than the T3 I am thinking of installing.

The exhaust is restrictive. I don't run a cat, but I can image that 2.33 or whatever the size racing beat exhaust is doesn't help at all.

And.....I am still bummed about the EBC not helping the spool.

 

it helped mine with a T3....


The biggest help with spool was my 3" exhaust and headwork however....


I almost never drive the miata without my laptop with me anymore, it's easy enough for me to change a few cells if the weather happens to be too cold and I overboost. In the least I have a switch to cut the EBC off and fail to wastegate, if one wanted, they could wire a MBC to fail to.

For the $5 I've invested into my EBC it works well enough for me. I maintain a perfectly flat boost level to redline, with my MBC it always spiked then tapered off a touch as seen above...

 

My MBC doesn't spike at all. It is a Turbonetics MBC if that means anything, probably not though. Once the MBC level is met then it is nice and flat, only fluctuating from 188-189 kpa. The EBC does work, don't get me wrong. I have fiddled with it enough to know that it is working as it should when I set the parameters to limit boost to wastegate level. It is just that the EBC hasn't increased my spool like I was hoping it would. Once I get the new exhaust I will revisit the EBC again to see if it helps.

 

It's final, EBC is out, just ordered my MBC.

 

I just finished the mods to my MS board and didn't even bother with EBC.