LetsGO7

iTrader: (2)

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

mazdaspeed00

iTrader: (6)

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.

mazdaspeed00

iTrader: (6)

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

LetsGO7

iTrader: (2)

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

mazdaspeed00

iTrader: (6)

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.

mazdaspeed00

iTrader: (6)

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

LetsGO7

iTrader: (2)

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

LAracer

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.

LetsGO7

iTrader: (2)

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

DaedelGT

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

LetsGO7

iTrader: (2)

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

thanks

-joe

DaedelGT

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

scratchjunkie

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

rynberg

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.

XSTransAm

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

XSTransAm

forgot to mention that i have the stock cat as well

LetsGO7

iTrader: (2)

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

Also many thanks to the list for replying!

DaedelGT

You'll still need a boost guage!

LetsGO7

iTrader: (2)

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