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Discussion Starter #1
This customer of ours started with 126hp on his bone stock 2010 Brutale 1090RR.
After an Arrow exhaust system and some mapping it bumped to a respectable 138 hp.

Then he went crazy. He had us install an F4 head and cams and after some more mapping and a 12,600 rev limit, he ended up with 169 hp at the rear wheel!!
Now that makes for a fun ride!!

Anyone else interested??
 

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Very nice dyno chart. Congratulations!!

One question:

Is the 2012+ 1090 RR cylinderhead somewhat like the "old" 2010 F4 cylinder head? The 2010 F4 is 186 hp at crank.

MV claims that the 2012+ Brutale 1090 RR engine makes the peak hp at 11900 rpm. But all the engines hit the rev limiter at app 11500 rpm and max torque is not at 10100 but at 8100 rpm.

How high can you rev the RR head?

I'm thinking to extend the limiter on my RR as it "only" makes 160 hp at rear wheel (only headers with standard cans, open airbox and mapped).

Jochen
 

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Discussion Starter #5
Hallo Jochen,

The cylinder head does not really determine how high you can rev an engine. The rev limit is determined by piston speed and what rate of acceleration and deceleration the pistons and rods can handle.

With the stock rev limit we noticed that the power curve was still increasing so we bumped the limit to 12,600 rpm. Stroke is the same as the 2010 F4 long stroke engine (compared to the current F4 corsa corta engine) at 55 mm so piston speed would be the same at any given rpm. The F4 had a red line of at least 13,000 rpm, so at 12,600 we are plenty safe.

We have not done any head work. We could slot the cam gears to play with cam timing and match the throttle bodies to the intake tracts better and maybe a little clean up on the ports. I am certain we could get to 170 hp, but I am not sure how much more there is in it.
MV Agusta heads flow very well and are some of the best stock heads out there. MV's engineer claims that the size of the stock air box would be the limiting factor from here on.

Anyway, how much more could you handle on a naked, upright bike??

Frohe Weihnachten und alles beste fuers Neue Jahr.

Gruss aus dem kalten Kalifornien.
 

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Gruesse zurück nach Californien!!

Just checked the specs of the F4 312 - same stroke and goes up to 13000 rpm.

As you said I would feel comfortable with a rev limit at 12200+ rpm.

Will have to ask my dyno guy.

And of course I will have rarely have the chance to use all that power. But I feel better to have that and it's better for the "Stammtisch" ;) .

Why not get out of the engine what's in????

I'll be in your area in april next year with a RV. Is there anything I should not miss regarding fuel smell and burnt rubber :) ?

Will arrive in Las Vegas on 11th then head down to San Diego. From there going north #1.

Viele Grüße
Jochen
 

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I just compared your dyno run with mine.




It is pretty much the same, highs and lows in the same revs.

So I think we can say engine wise the major difference between the 144 hp and the 158 hp version of the Brutale is the F4 cylinder head that they threw on the 158 hp version.

The 2010 F4 is rated 186 hp - and that is what you really can get out of the 158 hp version by setting the rev limiter higher and mapping the ECU.

THIS thread here is the best one for me this year :yo:!!

Jochen
 

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Maybe Hans should have a nice contribiution in this topic. He installed an F4 1078 RR in his Brutale and tuned it completely...
 

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Very good job!
Modern electronics and good old fashion hot-rod part swapping!
I had a 1975 Z1 Kawasaki, bored stroked to 1300cc, undercut gears in trans, Webber carbs,
RC cams. Made a true 160 hp at rear wheel. Big numbers for 1980!
It was a handful on the street! But fun!

Ed :)
 

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MV Corse sells the Cannonball Kit for the Brutales:



This kit goes for 4900 € plus tax.

They let the 1078cc block rev upt to 12600 rpm. The block remains untouched. 190 hp at the crank dynoed in German motorcycle magazine.

So the Cannonball kit just consists of a titanium can & header, the F4 cylinder head, clutch and a new ECU that lets the engine rev 1100 rpm higher.

So good news to let the Brutale engines rev that high and grab some more hp
.

May be the 144 hp does not get more hp, but the 158 version definitely does
.

Jochen
 

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This customer of ours started with 126hp on his bone stock 2010 Brutale 1090RR.
After an Arrow exhaust system and some mapping it bumped to a respectable 138 hp.

Then he went crazy. He had us install an F4 head and cams and after some more mapping and a 12,600 rev limit, he ended up with 169 hp at the rear wheel!!
Now that makes for a fun ride!!

Anyone else interested??
Can you tell, (by pictures?) the differences in head/valves? What year F4 it was, amount of displacement cc's? Combustion chamber might have gone from 79 to 76mm diam due to bore of cilinder where the head belongs to.
For sure the cams are different.
Nice would be some torque graphs, as according to the power line he lost some power (and torque there).

Oh it is fun, although in some areas not easy, depending on end reduction.
My airbox is not restricting the f4-1078rr engine much as it went to 190 at the wheel
 
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