Running Past 250kmh

[SavageF6]

Indeed fellas, good comments. My old Ef auto was limited to 180kmh which was a bit of a scary prospect.

Edited 17/12/06 10:19 AM by Spruce

[Lumpen]

Good ol' Hynodoc eh? 

I'm just wondering if a BA-BF driver could expect to see their tailshaft get fired out the back, or have their gearbox lunch itself if things were pushed too far, for too long.

Notwithstanding mechanical failure, for high speed running in my case, I'd have the entire driveshaft rebalanced at a minimum. What do guys who race these things do?

I've only kissed the spd limiter once (private road), and that was on the original dampers. At the moment I'm wearing Michelin PS2 tyres rated to 300kmh, and I have to say that with the Bilstein dampers, the car is absolutely glued to the road. No floatiness at all. Haven't been up to the limiter with them though.....

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I think the B series run a two piece tailshaft unlike the E series which has a looooooooong single piece that can come unstuck at high speeds (auto more than manual).

Assuming (and it's a big assumption) that you're oem tailshaft is well balanced there shouldn't be an issue there.

ZAP, I think the 250 km/h gentlemen's agreement is in Germany, just like the Japanese 180km/h. For example, the Fairmont is limited to 210km/h, the XR6T to 235 but the Monaro spins out to 270 plus! I think the limit on Ford's is solely for the tyres.

Lumpy

[Fat-Tony]

Good ol' Hynodoc eh? 

I'm just wondering if a BA-BF driver could expect to see their tailshaft get fired out the back, or have their gearbox lunch itself if things were pushed too far, for too long.

Notwithstanding mechanical failure, for high speed running in my case, I'd have the entire driveshaft rebalanced at a minimum. What do guys who race these things do?

I've only kissed the spd limiter once (private road), and that was on the original dampers. At the moment I'm wearing Michelin PS2 tyres rated to 300kmh, and I have to say that with the Bilstein dampers, the car is absolutely glued to the road. No floatiness at all. Haven't been up to the limiter with them though.....

←

I think the B series run a two piece tailshaft unlike the E series which has a looooooooong single piece that can come unstuck at high speeds (auto more than manual).

Assuming (and it's a big assumption) that you're oem tailshaft is well balanced there shouldn't be an issue there.

ZAP, I think the 250 km/h gentlemen's agreement is in Germany, just like the Japanese 180km/h. For example, the Fairmont is limited to 210km/h, the XR6T to 235 but the Monaro spins out to 270 plus! I think the limit on Ford's is solely for the tyres.

Lumpy

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Im pretty sure you will find its law in germany about the 250km limit, only german car to have an excemption from this is porsche

[WBT56]

...I'm just wondering if a BA-BF driver could expect to see their tailshaft get fired out the back, or have their gearbox lunch itself if things were pushed too far, for too long.

Notwithstanding mechanical failure, for high speed running in my case, I'd have the entire driveshaft rebalanced at a minimum. What do guys who race these things do?

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Tailshaft BALANCE is secondary. You have to ensure that both halves of the tailshaft are straight. Then they have to be balanced. Inner half shaft CV joints will want to be in good condition, as worn ones will allow run-out in the half shaft. Diff oil will have to be good quality, as many oils froth at high crown wheel speeds. Frothy oil will: a)run out the breather, and b) pit the contact patch under load. Gearbox will have to be very well toleranced if a T56, as high load in the overdrives puts a lot of stress on the mainshaft. My experience also shows the "T" to be very floaty (on std suspension) about the 205 mark. Ben.

[boosted_sa]

I think you'll find that a T with around 300rwkw will do over 250 quite easly. You are using a lot of road per second at that speed though.

[TornadoJudd]

As a person who has rolled a car at 170km an hour I would like to point out that the speeds we are all taking about are dangerous on public roads. If you are to have a misshap your life and the life of others are in the hands of GOD!

[SavageF6]

Wise words. I should reiterate though, that this thread was simply an exercise in trying to work out where the technical limitations for these cars exist at high speed, and was in no way designed to promote unsafe or illegal acts.

WBT56 has provided some great insight into the limits of the BA-BF drivetrain and manual box. I can attest to a completely stock F6 reaching 250kmh without breaking a sweat, so it's good stuff to keep in mind if I ever decide to track the phoon with any conviction

And thanks to lump for reminding me why I used to be jealous of those manual EF/EF drivers. Still got my auto EF too bless it.

'night all

Edited 17/12/06 01:32 PM by Spruce

[xrdreaming]

The APS car was using almost the entire width of the Avalon runway at 300 kph, it really was a floating barge on wheels with very little front end grip

[F6 RAPID]

My F6 is not limited to 250 *ahem*.................

Was still accelerating at the end of the speedo..........

[86gav]

So I would be right in saying that the speed limiter can be "Adjusted" with the Edit, yes?