Hey list,

My mods are BIG IC "(custom, size similar to m2 large IC), cat back, dp, and intake. Now, do i need stand alone or can i get away with running the stock ECU (for engine break in and running at the track)?


Thanks

-joe

 

U NEED A STAND ALONE ECU!!! but if u wanna go the cheap route get an electronic boost controller and set the boost to 12 psi.

 

i would not run your car hard with the setup u have. u will pop your motor soon if you do.

 

hmm...mazdaspeed00, do you want to meet up this weekend? I'm in OC, Cali.

Also, boost controller for now, would be ok? i'm not going over 4,000rpm.....so it's cool for now, right?

Thanks!

-joe

 

as long as u are not it boost is should be ok. the reason why u need a boost controller or upgraded ECU is to prevent your car from boost spiking.

 

u also need a ECU to modify air/fuel ratios so u do not run to lean and blow your motor.

 

damn.....there goes my coil-overs

 

I'm running the same mods on stock ecu (as are alot of other people I'm guessing). I'm using needle valves to keep the boost as low as possible, and I'm working on getting a profecb. Just from reading threads like this (I'm not a professional tuner or anything) I think we're safe as long was we keep the main cat. With a midpipe, it'd probably be too difficult to keep the boost down.

 

thanks guys.....more advice would be better

 

What are you boosting to? That's what it comes down to.

 

I don't know...no boost gauge...i know, i know, i'm waiting for one.

thanks

-joe

 

Well, at least you haven't detonated yet. Stay off the boost until you get your guage.

 

oh my.....fork the money for an ecu. at least a m2 or pettit or pfs.

 

You can run those mods just fine on a stock ecu, just keep the boost to 10 psi. People who claim you will run lean have obviously never looked at an a/f ratio plot using the stock ecu.....

Obviously, by installing an M2 or Pettit ecu, you would be able to safely run 12 psi instead of just 10, so it's $400-450 well spent.

 

I have those mods minus the intercooler... I have hooked a wideband up to my car and see air fuels of around 10.5:1 - 10.8:1 at redline, which is plenty safe... I have a mbc on my car and peak boost around 10-11 psi and taper it down to 8 at redline.... car runs great! and put about 245hp the the wheels on the dyno

 

forgot to mention that i have the stock cat as well

 

everybody, just ordered Profec B spec II, hopefully this solves it (boost gauge! ) ?! Would it?

Also many thanks to the list for replying!

 

You'll still need a boost guage!

 

but the Profec B Spec II has a boost gauge....