WSBK » BMW dominates opening test at Monza


Leon Haslam tops first free practice at Monza as BMW dominate early proceedings around the high-speed Italian circuit in 1st, 2nd, 3rd and 5th.

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Gaz - Unregistered

May 04, 2012 12:09 PM

So much for Aprilia's speed advantage. The BMW engine has ALWAYS produced more power than the RSV4 and this proves it?

So is Max now going to get the credit he deserves and the BMW's be acknowledged as being superior?

I guess not.

G - Unregistered

May 04, 2012 12:17 PM

Max was in the 1m 41's last year, it's only FP1, means little at this stage, also worth noting that Max was only 4mph faster than the quickest factory ducati last year so no real speed advantage to keep banging on about either, but people will, it's all about gearing anyway :)

Nick636

May 04, 2012 12:35 PM

@ Gaz

Firstly, the power figures they show at the start of the race are almost DEFINITELY not what the bike actually makes. Secondly, it's not always the MAX power, but how the bike puts that power to the road! With the V4, making power pulses much like the V2, it has fantastic mechanical grip, meaning it uses a lot more of it's power compared to the i4's.

But there is no denying Max's skill, he's brilliant. But if you are denying the top speed advantage of the Aprilia over the last 2 years you are a blind man, or didn't watch much WSBK. In production guise, the BMW is the fastest bike out there (VERY close with the ZX-10R), but it hasn't been like that over the last 2 years in WSBK.

Well, there's my 2cents. VERY interesting, can't wait for more sessions.

Nick636

May 04, 2012 12:46 PM

And PLEASE, people can we get through one weekend without "fanboy" this, "fanboy" that...

We are ALL happy there's racing, ALL happy to see a shake up, LET'S JUST ENJOY IT!!!! (THOUGH I STILL WANT SYKES TO WIN!) hahaha

Let's keep the good spirit. It's GREAT that the BMW is finally showing something, It's AWESOME that it's not EXACTLY what we expected to see so far!

Percentage

May 04, 2012 12:55 PM

"..With the V4, making power pulses much like the V2, it has fantastic mechanical grip, meaning it uses a lot more of it's power compared to the i4's..." @Nick636

I just wonder what piece of science, engineering or research that backs those statements up?

Each cylinder makes torque, the same torque whether it is in a V, L or i. The firing order subtly spreads the firing pulses in a different order. Across the normal rev range and with final drive gearing, these pulses are peppered across the tyre. It makes *ugger all difference to mechanical grip.

Nick636

May 04, 2012 1:06 PM

@ Percentage

I unfortunately would be lying if I told you WHERE I read it, but I've read quite a few articles in the past, both in magazines and online, as well as been told by a few Engineering-Types, when discussing the pro's and cons of V vs I configuration. I know the firing order does have to do with mechanical grip, as that was a BIG advantage for the "BIG BANG" Yam. Still had good top-end, with great mechanical grip out the corners. It must've worked too, else they wouldn't use it. But feel free to disagree. I am just going on research done, and as I am not an engineer, I won't guarantee it either.

Percentage

May 04, 2012 1:33 PM

Unfortunately most of what is written is plain wrong. First up, the Yam is NOT Big Bang. Big Bang was a couple of V4 2stroke NSRs. They eventually raced a version that fired ALL 4 cyl in about 70deg of crank rotation.

Top end? Have a look at the torq & power curves for a crossplane Yam - not much different to a flat/180deg crank four (Suz, Kwak, BMW). Torque is torque. Power is torque times time (or speed)(torque pulses per second).

With a flat/180deg crank, there is a big rocking motion every 180deg, when all pistons slow, stop, change direction and accelerate again (2x at TDC, 2x at BDC). A Yam crossplane spreads this out, so there is no big rocking motion of the spinning crank, rods, pistons.

Percentage

May 04, 2012 1:43 PM

It is all about the 'feel' for racers. Journalists speak *ull**** and say *hit because they 'think' they have to say it.

If you take rpm and gearbox ratios and sprockets, even at lowish revs, you have peppering the rear tyre with firing pulses.

Mr Yoda (ex Yam, now Kwak) engine believes piston motion makes a big difference to feel and an inline helps handling, tipping in etc.

A V4 centralises the mass. V2/L2 are comparing apples and oranges. Race rules gave more cc's and Ducatis are better spec'd bikes. Imagine what a $40,000 GSXR would be like?

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