Turbos On The Fg Falcon

[bcl]

The Turbo on the FG XR6 is a miss-match.

They use the same compressor wheel as a GT2540R but mounted on a GT35R turbine.

What they did with the turbo is a bit of a bandaid solution to the real problem.

I have always described the original turbo as a mismatch.

The compressor capablity far outweighed the turbine, and I doubt Ford ever expected us to get the power out of it that we have been able to achieve. Given that we started with a stock car pulling around 200rwkw, basically being able to double that to around 400rwkw with the same turbo is not what the factory would have had in mind.

I think the new turbo in reducing the compressor size gives a better match between compressor & turbine capability.

That the peak power has been reduced by around 20% wouldn't worry the factory at all, and better low down response would be a bonus. The people impacted are those who want to get power levels similar to BA/BF.

There are always better turbos around; but the bean counters will usually get their way.

Brian

[Ricks_Xr6t]

As most FG's wont see the other side of 330kw I dont think the smaller housing to be much of a problem and for those who do, there is plenty of turbo options out there to take it further.

Strongly agree there mate.

[KeepLeft]

I think I'm missing something. My FG turbo is 270kw stock, where as the BF was 240kw stock. Doesn't that mean the new turbo has more peak power?

[bcl]

Yes. We are talking rear wheel kw (power at the wheels) not flywheel kw.

The 270kw is probably equivalent to around 200-220rwkw.

Brian

[PHANTMXR6]

But with 330rwkw on the stock turbo (and yes there is one in Perth) ask Simon at XFT the FG XR6T/G6ET will whip its predecessor's for pickup and mid range,and launch.

Granted, but the turbo itself will be a limiting factor without mods.

As 01txr has pointed out, the potential of the standard turbo is much higher in the BA/BF/FG F6 than the FG XR turbo.

Keep left, it would appear as if the FG XR6T is more powerful than it's predecessor due to a couple of reasons.

The main being a smaller compressor, therefore faster spooling and less lag.

The other is initial factory boost. The FG XR6T runs around 10psi whereas the BA/BF ran around the 3-5psi mark.

Run a BA/BF turbo at around 10psi and see what sort of difference it makes to power output.

[RAP1D]

So do we have some facts now?

From what Ive seen and heard, FGs with the smaller turbo ( T & ET ) are dynoing in at 220-240wkws depending on dynos and the usual variables.

F6s are seeing a fair bit more, I heard of some at 260, but making mid 300s with tune/exhaust/injs... and T & ETs making low 300s with the same mods.

There is also exhaust and inlet manifold design changes that have impacted the way power is delivered, just by looking at the xhaust manifolds design, boost should be available sooner in the rev range, but also taking less air flow to spool, this is noticeable on freeway driving where boost is almost corresponding to throttle movement.

The higher engin comp ratio has alot to do with this as well.

In my G6, in 4th & 5th gears at on the freeway, the boost gauge needle is accually hard to keep off positive boost, bring on 10psi around half a second after the throttle is pushed.

In my view, its a mixed bag for me... I like the fast responce off the mark, and being so close to full boost in most gears, this is awesome on mountain roads/country twistys as the car responds so well, and picks up speed instantly, definatly one of the least laggy cars I've driven in factory form.

But shear top end grunt isnt like what the bigger turbo delivers, I find you can get up onto max power very quick (early in rpm) but the boost climb ends quickly and just revs out.

Top end revs through fast, but fails to continue the hard push... so this is always the trade off in turbo sizing, but I think for alot of poeple, the smaller turbo will be very suitable.

Like 72 said above, most wont go beyond mid 300s, so this smaller turbo, with its awsome response is a great match.

[KeepLeft]

Ahhh now it's all making sense

[notol]

Quick question with the FG XR6T - is it possible just to change the compressor in these, is that the only difference between the FG F6 variant?

Just curious is all.

Edited 22/07/09 10:48 PM by notol

[Benny]

Yes you can take the FG XR6T turbo to someone like GCG and they can change the compressor for a bigger one. The rear housing is the same.

Benny

[notol]

Cheers mate