My ltd knowledge is that the Mazda 6 engine and the Mazda SP23 engine are identical. The two key differences are the 6 has a dual exhaust (initially a larger singular pipe than on the SP23) that splits into two. And the 6 is optimised for premium fuel only.
If you optimise the SP23 for premium only and modify the exhaust to achieve parity with the 6 exhaust then you'll jump the performance up to 122kw.
It's another 18kw to 140kw, it will cost a fair bit of cash but the engine is tough enough and big enough to handle it and beyond I'd imagine.
I've strut bars on the existing SP20 hatch, the SP23 has an additional 40% rigidity so I doub't they're necessary and the suspension is already hardened compared to the standard Mazda 3. You definitely improve the handling but it wouldn't be "dramatic" unless you lowered it and by the time your done it would feel about as comfortable as riding a one humped camel through a Basra minefield.
I agree with the 2.25 suggestion, if you over tune the high end with oversize exhaust you'll end up with a corolla sportivo that has no definable difference to the standard corolla unless you thrash the snot out of it at all times and keep the rev's really really high - e.g. useless mod
Each to their own though I guess, what I'd like to do is keep the existing cars handling, tyres, basically everything so as not to break up the awesome styling and swap out the exhaust, air intake, ECU. Essentially take the factory settings and take all the conservatism away without unbalancing the car.
Ok 2.25 inch sounds the way to go by popular opinion. I guess I'm no exhaust technician, I just knew 3 inch was way too much.
I agree though, leave the ride alone unless it's getting track work or you really drive on the limit. The factory setup is the perfect balance imho, nice and firm but not annoying on low quality roads or over the speedhumps that they've kindly put in most Melbourne backstreets.
This has to be the smoothest 1300kg 4 cylinder I've ever driven in. The number of times I shift into 3rd and I'm doing 80kmh+ in a 60 zone without realising. Mazda have achieved European quality if you ask me.
From scanning the americans on the forum it seems there are no spec muffler upgrades available for the 3 as yet - it seems to be a unique design that may take a little while for mods to filter down to us down under (or alternatively be very expensive to custom fit).
well according to mazda, the SP23 can take either standard unleaded fuel or Premium. But I guess they could be telling me stories.
Im thinking to get some more power from the car (I haven't even got it yet!) I may buy a power chip for supposedly %10 extra power. what do you guys think about the chips?? or buying the turbo kit when it comes out ??
Chips will only provide you substanial gains after the Air filter, extractors, exhaust is done.
Turboing and chipping the car are 2 completely different things you have to think about.
Turboing will put alot more extra stress on the engine which = shorter engine life, provide you alot extra torque, therefore increasing maintenance fees and insurance. (because the engine bay is soo clustered, i'm wondering where they're gonna fit the turbo in.)
Chipping your car keeps it NA (naturally aspirated), the airfilter, extractors and exhaust should give you an extra 15-25kw. Then adding an aftermarket chip and tuning the newly added mods and for the engine to run on premium specifically, you may be looking at another 10% on top of your current gains. (depending on the chip).
If you decide to go down the path of chipping your car, engine life is preserved as all you are basically doing is clearing up the engines breathing, and when the engine breathes better, in turn it will provide more output.
If after all this, you still feel you need a power feed, the options of turbo and supercharging are still available, but for this modern engine with S-vT i would think a supercharger would work alot better with it, also maintaining engine life. (remember - this will void your engine, exhaust, airfilter, extractors, ecu and any other mods you do to it.)
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