Stock Xr6T

[rbjet]

Pookey hit the nail in the head.

For an xcal 3 and tune your looking at roughly $1500 depending where you go.

Id you plan to upgrade your turbo and go for more power in the future I suggest you get some larger injectors like deka's or id1000s.

If you plan to keep your standard turbo and around 300kw then go for some second hand FG F6 injectors or bosch 968's. Should be able to pick up a set of either for around $300.

[ratter]

Unless Direct injected, all modern petrol cars run around at 14.7:1 except for hard acceleration or when started

[Ralph Wiggum]

What sort of afr's do DI cars run Ratter?

[ratter]

Some run over 20:1 in europe because they have better fuel, our direct injected engines normally are still around 14.7:1 because of our fuel quality

[Lax]

How about in terms of safety and reliability. Would running it on a leaner tune be ok for a daily drive. I drive a tick over 100 km to and back from work each day and would really love better economy.

[ratter]

running leaner requires bigger spark plug gaps, running higher boost requires smaller spark plug gaps, kind of contradict each other.

Running a little leaner would not be a real issue, but you can not run it leaner and remain in closed loop fuel control as the ecu will be adjusting to 14.7:1 while in closed loop, so you need to do a tune for open loop fuel control.

[Ralph Wiggum]

Mick, dont most Engines see a reduction in torque after the mixtures go leaner than aprox 16.0?

If so you kind of wind up chasing your tail, run it leaner and you loose torque so you wind up opening the throttle further and increasing load. So any fuel saving by going leaner is chewed up by the increase in load?

[ratter]

Yes you lose torque, but you gain fuel economy

[discostig]

Would you (in a perfect world) want a tune for stop start driving (more torque) and one for open highway cruising (leaner) ?

[Dush73]

  Quote

Get a k&n panel filter and a vcm tune.. You dont need an xcal unless you want it for the zf tune or to change tunes

Is a VCM tune just another brand, just like Xcal? Like to avoid having to pay for a flash box(xcal) considering I will be keeping the same tune. Is this possible/feasible?

I have a BA II auto & due to the flakiness of the transmission,valve springs etc I'd like to limit my custom tune to a 10psi(on 98octane) to preserve those components, maybe go a CAT or injectors if not too expensive(few hundred ea on ebay) to maximise the tune. Which would you guys choose 1st,injectors or CAT?

One last thing,what kind of performance improvement(say 0-100km) could you expect from custom(10psi)tune without mods? eg stock BA XR6T do it in 6 sec, after tune? Guess you can see I'm after low down torque, as the BA auto's seem to be sluggish off the mark?