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Performance upgrades, need help!

10685 Views 70 Replies 13 Participants Last post by  The Great NY
Hi there,

I recently bought a 04 mazda 6 3.0 and I'm looking to put some stuff into it to add some hp. I'm thinking of getting a downpipe,headers,exhaust system, intake system, throttle body, front and rear strut bars, short throw shifter.

Has anyone done any of this to theirs? I need to know good places to purchase them from and any ideas.

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how much are you wanting to spend on power? that will kinda dictate which route you take
There's good power to be made NA on this car. But you need tuning. Just as any other car to date. You can have all the mods known to man but if the car is left untuned. You won't get anywhere near the power potential the car is capable of.

you can run meth on an NA car as well but to get the gains. U need to tune. Intake and headers are pretty much a must with this car so you can let it breathe better.
U can get lighter fylwheels...stiffer mounts to make putting power down more effcient. Some bracing and suspension mods to make her carve the streets.

What are you looking for? A better handling car? Just power? Modding can get expensive. That's why I asked how much your willing to spend on your hunger for power.
Lol...since when was an aem intake 400 bucks?
I was refering to the Racing beat exhaust LOL
O ok...phew...i was like wtf...he got raped
So you wouldn't do air intake, or exhaust system, or headers?
I wanna make the car around 300 hp, is that possible
Its possible yes. But u need all the supporting mods to do it na. And its more than a few hundred bucks
Ill post something shortly. I'm on lunch break
ok, without boosting....for 300bhp

full exhaust
lightweight flywheel
lightweight pulleys
fluidampr crank pulley(safety)
clutch (to hold the power your shooting for)
powermod tuner
ported upper and lower intake manifold
i would get cobra coils as well
water/meth injection(optional, but a good thing to have due to the aggressive tune you'll need to run)

the above will get you there. but it would require running 93 octane and running a very aggresive tune. that was for NA with no big power adder and would wind up costing around 3-4k or so for everything


headers, intake, and a 50-75 shot(wet shot) of nitrous, and the powermod tuner, and the egr mod, clutch, wideband

this can be done for about 2-2.5k

now these prices are assuming you do all the work yourself (installs). if you have to pay a shop to do the installs and tuning then the prices will go up.


you'll be spending about 4k+ if your going to turbo. or you can buy the base kit supercharger from nautilus performance for about $3800 and add a clutch to that.

it can get expensive. the biggest part of pulling it all together in tuning the car to its max potential. im sure i may have missed one or two things. but this is just a helper to see and help you gauge what basically needs to happen
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also, a big thing that will determine power output would be the health of the actual engine
NA, N/A....means naturally aspirated. or all motor meaning an engine without forced induction (turbo or supercharger)
N20 is not forced induction (IMHO) since it is simply another fuel, like alchohol or diesel. N20 just burns a lot faster and has other properties that preoduce more power than gasoline can. (its an oxidizer)

i would say that an engine running N20 should not be considered an N/A engine for the simple reason that there is no COMPRESSOR forcing more AIR into the engine. but thats just my
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I also have a typo in my post. I meant to say a nitrous fed motor should be considered NA. Since there is nothing taking the engine above atmospheric.

And rob just explained more in detail what I said with one word. NO2 is and "oxidizer"
Haha...I never said fuel was an oxidzer. I said NO2 is an oxidizer.
I'm referencing it as fuel by the way its injected and sucked in by the engine itself. Not blown in. I felt that was the easiest way for someoen who doesn't know much about it to be able to compare it to something and also a reason why no2 shouldn't be used to have an engine drop the NA denomination.

Then when I said that is burns faster than gasoline due to other properties and put in parenthsis "its an oxidizer" I was referring to what NO2 is.

As for the V6 making 300bhp....ill ask this. How much power does it take a mazda 6 v6 to run dead even with an evo 9 with an intake? Evo being about 100-200 lbs lighter iirc. Using drivers with equal abilities and knowledge of how to really drive their car. My car did it.....3 times. Until it got heatsoaked.

Edit...the evo had two passengers and the driver. And I had a passenger. So the weight was pretty much even
I think the easiest route for the op would be spraying the car. With a tune of course. But I know some people don't like nos much. Hell I don't myself
the charge from a turbo is still sucked or induced into a combustion chamber, just like the charge or a nitrous spray. both are held under pressure and create positive crank case pressure....... both required addition fuel because they have increased the volume of O2 in the combustion chamber.....

they are the same thing by all accounts. N20(nitrous oxide, not di-oxide) doesn't burn like gasoline.

If you spray it and ignite it, it does not explode as it is not combustible. it needs a fuel additive to combust... butane, gasoline, alcohol, ect.

as for your reference of 300 BHP...... you step out of BHP and have stepped into WHP pretty damn quick with your reference nor would I have any idea on what upgrades would need to be compatible with a Evo.

never mind things like elavation, temp, tires, power loss at the drive train on both vehicles, suspension ect would all pay a huge roll. Non of which should have a reference to BHP as this is souling what an engine makes in a solid state.

Ps Much respect to you justin and you know that, just don't want anyone having misconceptions about these systems.

Not sure how I went out of bhp into whp in the post you quoted.

But are completely wrong about something. The air from turbos and superchargers does not get sucked in by an engine. It is blown into the engine under load enough overcome atmopheric. Why do you think they call it boost? We are talking power here. So in turn we are talking WOT. You go wot on any supercharged or turbo car you will see positive manifold pressure. Boost is the common term. Boost happens because the turbo or supercharger is forcing air into the engine fatser than it can suck. Another term...force fed. The air is pressurized...if the engine was sucking more than the turbo or supercharger you would never see boost. Turbos and superchargers are the morst cost effective way to achieve. VE well beyond 100%. The ONLY time a turbo or supercharged equipped vehicle is sucking is at idle or part throtlle (loads under the threashold to create boost or overcome atmopheric pressuse)

There are NA motor than have been known to see boost...but it happens in motors built bananas by someone with the knowlegde and hundreds of thousands of dollars to do so.

A nitrous motor does not see above atmopheric pressure unless its built like the above example. The nitrous is still sucked in by the motor alone. Not blown into the. Chambers.
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Without a shadow of a doubt. making sure the compression is good, the suspension is solid, and the motor is safe is far more important than adding 10-15-1 million HP.

as who cares how much power a car makes, if you have to push it down the driveway.... just ask my in-law;)

I make 2000hp....but I gotta pop start it and I can't turn or go down my driveways...

im not even debating the nos vs supercharger vs turbo thing anymore. this is the last thing i will say on that...

1. nitrous is sucked into the motor, not blown no matter if its at WOT or not. it is SUCKED/INJECTED not blown into the cylinders.

2. turbos and superchargers blow air into the engine, the engine does not suck the air in while in WOT when turbo'd or SC'd

I will except calling nitrous a power adder. But I will NOT except calling nitrous forced induction. Because it is NOT
Well doesn't a stock 6s puts out like 165-170hp to the wheels? Doing I/H/E will probably get you to 200hp.
Stock 6s is 185ish

Edit: oh...and I have tuning avaiable for the 6s and the 6i
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