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post #1 of 15 Old 06-16-2004, 9:34 AM Thread Starter
 
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High Performance Pistons...anyone?

Out of curiosity, is anyone running any high performance pistons in their bikes?
Is there a significant gain or marginal? Or does anyone have any thoughts about them?

Thanks
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post #2 of 15 Old 06-16-2004, 9:36 AM
 
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Re: High Performance Pistons...anyone?

Ask an Erion owner. They have the HRC kit in their bikes.
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post #3 of 15 Old 06-16-2004, 9:41 AM Thread Starter
 
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Re: High Performance Pistons...anyone?

OK.
Any Erion owners, I'd appreciate any comments... so please chime in at anytime.
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post #4 of 15 Old 06-16-2004, 9:54 AM
 
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Re: High Performance Pistons...anyone?

I have pistons, but every other part was changed as well, so I can't really tell you the difference they make. I did leave a freind on an 02 Gix 1K last weekend like he was wearing a parachute. (open of course). I'm really pleased with the motor. The bike is more rideable on the street, with smooth power everywhere. There is just the last 20% of throttle that scares the out of me. That is also great as my gas mileage has gone up 40%.
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post #5 of 15 Old 06-16-2004, 10:07 AM
 
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Re: High Performance Pistons...anyone?

In the last several months in Roadracing World, Sam Fleming from Army of Darkness Endurance racing team has a series discussing how to prep a bike from stock to a high performance, reliable endurance racer.

He says that unless the bore is changed, the current 'slipper' type pistons which are treated with ceramic type coatings are as good as any aftermarket pistons.

(Of course, if you're increasing compression by turbocharging, N0s, etc, I'd think about it.)

You should check out that series of articles, it's got a title like "All is Vanity", the destruction of carefully engineered parts, or something...

He's a good writer, and his section on how the engine is torqued together is really interesting. He says that alone can affect a 600 engine by 5 horsepower.
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post #6 of 15 Old 06-16-2004, 10:32 AM
 
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Re: High Performance Pistons...anyone?

After reading an article about mag wheels (forget what site) being 20 lbs lighter than 929's stock wheels, I wish I'd put my full exhaust money there.

I'd love to invest in engine work but I'm trying to keep my per-bike value under $6000 since I don't have collision coverage.

Last edited by brian48130; 06-16-2004 at 10:35 AM.
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post #7 of 15 Old 06-16-2004, 10:40 AM
 
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Re: High Performance Pistons...anyone?

The Erion Edition 929 is paint and stickers compared to a standard 929. NO MOTOR MODS. JE or Cosworth make great pistons.

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post #8 of 15 Old 06-16-2004, 12:44 PM
 
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Re: High Performance Pistons...anyone?

How high could you go on compression and still maintain reliabilty and run on pump gas? How much HP increase would you see? Would anything else need to be changed?
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post #9 of 15 Old 06-16-2004, 2:10 PM
 
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Re: High Performance Pistons...anyone?

Quote:
Originally Posted by slowpoke
How high could you go on compression and still maintain reliabilty and run on pump gas? How much HP increase would you see? Would anything else need to be changed?
Give Superbike Mike Engineering in Ft Lauderdale a call. He has an uncanny knack for guaging gains from various engine mods. Pistons alone (or decking the heads) probably won't do much (~5 HP, but usually all around, not just on top), but put that together with porting, a full round valve job, cams, flowed throttle bodies and a decent custom map and you might see another 25 HP above 6K. At that point I would probably have the crank knife edged and hardened and all moving components balanced as well. Expect to spend around 7.5K for the real deal . . .
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post #10 of 15 Old 06-16-2004, 3:27 PM
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Re: High Performance Pistons...anyone?

This thread can now be closed....
Fig
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post #11 of 15 Old 06-16-2004, 3:36 PM
 
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Re: High Performance Pistons...anyone?

Ouch, it'd be a lot cheaper and easier to trade for a 1000RR! But it would make a hell of a sleeper.
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post #12 of 15 Old 06-16-2004, 4:03 PM
 
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Re: High Performance Pistons...anyone?

There was a certain 929 that would show up at Grattan a couple of years ago and totally decimate anything on the track. I spoke to the owner a couple of times and he had over 8K in the motor alone, coupled with full on Ohlins Superbike forks, shock, 16.5" rear wheel (Marvics of course), Brembo calipers and MC, CF tank and bodywork and full Computrak setup. He said it was "over 175" horsepower and weighed 367 pounds wet. It was a rocketship, but unfortunately, he wasn't a terribly great rider . . .
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post #13 of 15 Old 06-16-2004, 4:20 PM
 
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Re: High Performance Pistons...anyone?

Quote:
Originally Posted by abtech
There was a certain 929 that would show up at Grattan a couple of years ago and totally decimate anything on the track. I spoke to the owner a couple of times and he had over 8K in the motor alone, coupled with full on Ohlins Superbike forks, shock, 16.5" rear wheel (Marvics of course), Brembo calipers and MC, CF tank and bodywork and full Computrak setup. He said it was "over 175" horsepower and weighed 367 pounds wet. It was a rocketship, but unfortunately, he wasn't a terribly great rider . . .
Sounds fun!



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post #14 of 15 Old 06-16-2004, 4:25 PM
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Re: High Performance Pistons...anyone?

Quote:
Originally Posted by CBRVFR
In the last several months in Roadracing World, Sam Fleming from Army of Darkness Endurance racing team has a series discussing how to prep a bike from stock to a high performance, reliable endurance racer...

...his section on how the engine is torqued together is really interesting. He says that alone can affect a 600 engine by 5 horsepower.
That really impressed me too. Just took it apart and assembled it correctly. Just another hint on how a factory "supersport" bike might be better than a privateer's.

Is a paradigm worth 20 cents?
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post #15 of 15 Old 06-16-2004, 9:29 PM
 
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Re: High Performance Pistons...anyone?

Anyone got a scan of that article?
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