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Forced Induction Crankshafts?

Posted: May 5th, 2010, 11:45 am
by hoofarted
Have any of you seen or know anything about this mod? Sorry bout the large pic as I am linking to their site directly.

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Forced Induction Crankshafts
A patent pending modification for all two stroke applications!
Dirt Bikes, Snowmobiles, Personal Watercraft, ATV's, Chainsaws, and more!

The Parris Racing Concepts forced induction crankshaft modification works by cutting veins into the crank halves of the crankshaft. The veins are cut at specific angles into one crank half, and then a mirror image is cut into the other crank half. As the crankshaft spins, these veins pick up the Air/fuel/oil mixture inside the crankcase. A process called flow dynamics then routes the Air/fuel/oil mixture down the veins where it is directed at the transfer ports of the crankcase. When the engine enters its intake stroke, the extra Air/fuel/oil mixture is pulled into the cylinder. The flow dynamics affect also atomizes the Air/fuel/oil mixture in a way that it allows a cleaner, more complete burn inside the combustion chamber.

The PRC forced induction crankshaft modification will work on any two stroke engine, i.e.; snowmobiles, dirt bikes, quads, jet skis, and even chainsaws. We modified a 2008 Suzuki RM250. It was found to gain 15.74% percent in HP and 18% in torque. Below is a comparative dyno showing the stock vs. mod results. The PRC modification produces enough torque that it has broadened the power band dramatically. A motor with a PRC, Inc. forced induction crankshaft pulls as hard most of the way through the RPM range as a stock motor does in the peak of it's power band. Therefore, the modified machine gets to top speed faster than any stock machine currently available.
PRC offers repairs and modifications by our experienced mechanics
We Port and Polish!

Benefits of the PRC, Inc. Modification:

Engine Durability - We had over 250 hours on a modified KX250 without a rebuild of any kind!

Power Gains - Increased HP and Torque

Weight Reduction - A lighter crankshaft creates a better power to weight ratio

Machined Precision - All machining is performed on a HAAS 5-axis CNC Mill
Bonus Services - We true every crankshaft free of charge after modification
Link to site: http://www.parrisracingconcepts.com/Home_Page.php

Not that I don't have enough power from the 500 as is...but does this really work?

Posted: May 5th, 2010, 12:37 pm
by dannygraves
turboed crank.... snake oil...

Posted: May 5th, 2010, 12:39 pm
by dannygraves
how much airflow can a 5000rpm wheel at that size with just some grooving make? a turbo spins at 150,000 rpm with blades and a specially designed housing. If nothing else I think turboing a crank will cause additional turbulance, that area already had air flowin gin like 8 directions, why add more.

Posted: May 5th, 2010, 7:22 pm
by plynn41
Count me a non-believer when they claim over 15% horsepower increase. So a 40hp RM250 went to 46hp with this addition only? BS

Posted: May 5th, 2010, 8:41 pm
by NightBiker07
i would have to see dyno sheets from an independent tester to believe it. at first i thought it was a crank mod for a forced induction motor, not a "supercharger"

Posted: May 5th, 2010, 8:55 pm
by ellett
I cut way bigger grooves in my crank. You wouldn't believe how it runs.....

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Posted: May 5th, 2010, 9:03 pm
by AlisoBob
ellett wrote:I cut way bigger grooves in my crank. You wouldn't believe how it runs.....
Your so friggin crazy John.....

:headbang:

Posted: May 5th, 2010, 9:29 pm
by NightBiker07
is that for real?

Posted: May 5th, 2010, 9:44 pm
by dannygraves
lol, nice photoshop'd crank with turbo compressor wheels :lol:

Posted: May 5th, 2010, 11:29 pm
by ellett
NightBiker07 wrote:is that for real?
Yup, and it's for sale. It has the big set of powerbands on it, too.

Posted: May 5th, 2010, 11:42 pm
by nmdesertrider
If you read the blurb it isn't done for airflow, it is done to push the oil gas mix towards the transfer ports.

Posted: May 6th, 2010, 5:44 am
by Roostius_Maximus
k, so who has a picture of a 500 crank without cans? dont think theres that much material

Posted: May 6th, 2010, 5:51 am
by glen howell
Will this help Glen
Image[/img]Image

Posted: May 28th, 2010, 7:40 am
by blownbillybob
it might have helped if it was a cr500 crank glen

looks like a 4 stroker to me :shock:

Posted: May 28th, 2010, 9:08 am
by glen howell
Sorry about that will dig up better pic meanwhile heres one of my stroker cranks with the cans off.Glen
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