SAMiAM

Just a quick question, if i get the stage 1 first and then decide to add intake, exhaust, etc.. would i need to reprogram the stage 1 or just let it be?

TORacing

Guys I've heard from some people that Canzoomers stage 1 mod doesn't work well with Intake and exhaust mods but I also heard this

Quote: "adding an intake with the stock fuel maps may not be a good idea because the ECU will just add even more fuel at the higher revs and make the air/fuel ratio worse.

He then made a comment stating that any mod that increases air flow (i.e. intake, exhaust, headers, etc...) should work with better with the tuned fuel maps."

Is this with the stock ecu or canzoomers stage 1 mod? If with this is the Stage 1 does this happen with the stock ECU as well? What are they talking about when they say tuned fuel maps? And how do you tune the stock fuel maps?

SCiMMiA

What about Stage 1 makes it technically street illegal?

brothervoodoo

The only thing theoretically that Stage 1 would effect is the longevity of the catalytic converter.

SCiMMiA

Ah, yes, EPA illegal. That's the manufacturer's concern. I thought Friend was saying illegal, as in something WE could be held responsible for, and I was racking my brain trying to figure out what. Thanks, bro.

canzoomer

Correct.

I have NOT tested intakes.
All i said was that I think the stock Mazda intake is quite good, and i feel that little is to be gained there.

I think that exhaust on a car that is absolutely stock gains little, but that this is due to the poor state of tune in the car in stock condition.
I DO know that ones with the Stage1 installed seem to be quit strong with aftermarket cat-backs, like the Borla or Greddy.

I have driven ones with both exhausts and our Stage1 kit, and they definitely are stronger than with stock exhaust.

My other concern with intakes is that they tend to howl loudly.
My last two cars had aftermearket intakes, and thenoise was pretty powerful, more so than my exhaust mods.
I really notice this kind of thing at part throttle on the highway.

In any case, I believe there is more gain to be had in exhaust than intake, but I will be doing some dyno tests with exhausts soon, and I am hoping to get my hands on the Rotary Extreme intake kit soon, so will test with that as well.

In general I can say that adding intake and exhaust to a car in stock tune often does not add as much power as when the car is set up properly in terms of fuel/air mixture.

brothervoodoo

Look forward to see what additional gains are to be had with the Stage1/exhaust combo.

RX-8 friend

My comment about stage 1 being technically illegal is that it is illegal to mess with ANY part of the emissions. The PCM is part of the emissions. Even if it doesn't raise emissions. In fact, it will probably lower them. Same goes for replacing the cat. with an aftermarket one. Even if the non-stock replacement works fine, it's still technically illegal.

This was all tightened up just last year. That's part of what happened to Mazda's HP claims. EPAII.

SCiMMiA

That's progress for you. A new EPA law that makes Mazda tune the car to put out more emissions to keep legal.

canzoomer

Unfortunately the regulations are mainly concerned about CO and NO, and not about total carbon load.

As a result the ironic part is that modern emissions laws cause cars to burn about 50% more fuel than they should..

As they say, if you don't like it, write a letter to your congressman!

Omicron

So do you guys up in Canada have to follow the same EPA regs as all of us down here in the 'states?

tommy12g

I too have seen Genom's exhaust and it looks sick!!! very nice!! and sounds great

guy321

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I have a RE intake, but I took it off to run Stage I (with Borla exhaust) . Do you think it would be safe to put it back on ? Or should I wait till you have conclusive testing? Also, there's a thread about connecting the vaccum hose for the VFAD witht he RE intake.. it makes it ALOT quierter under 6000 rpms

canzoomer

Yeah. It is SO PATHETIC!
The new regs basically say "just like USA EPA2"

They did not even bother to draft real legislation, jus tmade it point to the USA one.
Of course cars destinied for N. America have to comply with the same regs. A lot go over the border. most models are made identically for both US and Canada markets.