going turbo..

DjSpecter · Post by **DjSpecter** » Mon May 25, 2009 11:35 pm

Ok I am building up my little NA 1996 Miata 1.8 but got a few questions..
I bought a turbo and manifold and a box full of intercooler pipes and a intercooler and BOV and wastegate and a custom exhaust and injectors and I plan to get a turbo timer and a couple of guages. I only plan to run a SMALL amount of boost maby...like 5 or 6 pounds. ok here is my question.........

Can I run the car on a stock ecu? Can I got a stock ecu reflashed or tuned?

JDM AE86 · Post by **JDM AE86** » Mon May 25, 2009 11:51 pm

Im not familiar with that engine but you should have to "trick" the ecu. In the past I have done it with check vales tee in the vacuum sensor. The more boost you will doing the more or larger the check valve needs to be. Like this the vacuum sensor will be just as normal but as soon as there is a positive boost pressure the valve or valves will start to bleed the boost from the sensor.

DjSpecter · Post by **DjSpecter** » Tue May 26, 2009 12:00 am

Cause I seen people build there own MegaSquirt and im not good with electrical. LOL dude I cant even wire up a raido to save my life. So if its electrical were talking about then forget it. I got every ting for a bolt on kit but not sure about stock ecu...

mooreofit · Post by **mooreofit** » Tue May 26, 2009 9:40 pm

if the turbo's small (t25 ish) and you plan on keeping it below 10 psi i would just use an fmu.

but i dont know what other issues you would have with your mazda electronics. some ecu's dont mind boost like my gm pcm and will read actual airflow via maf and compensate accordingly. if its map based it will probably give you hell.you can use one way check valves in the map vacuum circuit so the map never see's boost and the fmu will add the extra fuel.

dont forget to pull timing at least 1* per pound of boost.

also there might me flashable programers out there for your car most will let you adjust your timing and fuel tables. these normally arent to expensive.

DjSpecter · Post by **DjSpecter** » Tue May 26, 2009 11:17 pm

I shall look more in to this.

mooreofit · Post by **mooreofit** » Wed May 27, 2009 6:25 am

i ran a garrett t25 at 11psi for about a year with an fmu. worked great!!!

DjSpecter · Post by **DjSpecter** » Fri May 29, 2009 5:46 pm

FMU.....what is this?

ga_goosh · Post by **ga_goosh** » Fri May 29, 2009 6:13 pm

i think it is fuel management unit

mooreofit · Post by **mooreofit** » Sat Jun 06, 2009 6:21 pm

correct. i forgot to add i was running 200cc 7afe injectors on my 4a motor also.

mooreofit · Post by **mooreofit** » Sat Jun 06, 2009 7:30 pm

correct. i forgot to add i was running 200cc 7afe injectors on my 4a motor also.