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Author Topic: Engine Specs  (Read 10809 times)

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Offline blackslax

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Engine Specs
« on: June 14, 2010, 02:53:30 PM »
I have a question about engine specifications.

I know in motorcycle classes, engines have to be either from a motorcycle or "purpose built".

What constitutes purpose built?  I can have an engine custom made with proprietary purpose built heads, barrels, crank, pistons, rods etc. Is it considered purpose built if the heavily modified base is a Polaris casting or is it considered a snowmobile engine?  It is a matter of cost.  They will CNC a base for $4000 or I can use a Polaris base that is then heavily modified for $1,200.

Would someone in the know care to chime in on this.
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Offline tekebird

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Re: Engine Specs
« Reply #1 on: June 15, 2010, 08:11:48 PM »
I'll bite at this one.

Production is not an option

Modified is likely not an option either as Polaris does not make motorcycle engines ( Victory is a sep. Co.)

Altered:  Go for it  you could put a steam engine in it if you wanted to
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Offline Peter Jack

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Re: Engine Specs
« Reply #2 on: June 15, 2010, 08:51:45 PM »
I just noticed this is posted in the ECTA section. They tend to do things a little differently than the left coast and accept a broader range of vehicles. Why not contact them directly to get your answer? The one thing to watch out for is that what's accepted there might not be accepted by other organizations. You may have to follow the same route with any organization you might intend to run with.

Pete
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Offline Joe Timney

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Re: Engine Specs
« Reply #3 on: June 16, 2010, 05:24:32 PM »
In Special Construction/ Altered and Streamliner, you can have a purpose built or motorcycle motor. Non-motorcycle motors are not allowed. Sorry, I know you were looking for a different answer.

Joe Timney
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Offline wrongway

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Re: Engine Specs
« Reply #4 on: June 16, 2010, 06:43:45 PM »
I am looking at getting a BossHoss to run in production. Is that legal ? these motorcycles are built using a chevrolet based V8 motors, does that make it a motorcycle motor?

Roy


Quote from: Joe Timney on June 16, 2010, 05:24:32 PM
In Special Construction/ Altered and Streamliner, you can have a purpose built or motorcycle motor. Non-motorcycle motors are not allowed. Sorry, I know you were looking for a different answer.

Joe Timney
President
ECTA
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Offline Joe Timney

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Re: Engine Specs
« Reply #5 on: June 16, 2010, 08:54:18 PM »
No, it is a car motor.
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Offline Stan Back

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Re: Engine Specs
« Reply #6 on: June 16, 2010, 09:27:07 PM »
Boy -- that was easy.
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Offline tekebird

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Re: Engine Specs
« Reply #7 on: June 16, 2010, 10:06:24 PM »
wow I would not have figured that, I can understand the Boss Hoss Chevy, but in Alt/Spec Construction I would have expected you could put anything in it.

what makes a motor purpose built?  I one off built from your own castings?

So much for my Formula 1 Sidcar with a blown/fuel Snowmobile motor   :cry:
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Offline wrongway

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Re: Engine Specs
« Reply #8 on: June 16, 2010, 11:25:08 PM »
Quote from: Joe Timney on June 16, 2010, 08:54:18 PM
No, it is a car motor.

production class has no such rule....

only says that 500 have to be sold thru retail motorcycle dealers....

Roy
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Offline dw230

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Re: Engine Specs
« Reply #9 on: June 16, 2010, 11:40:13 PM »
This is going to get good, haven't had this one for a while.

DW
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Offline Freud

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Re: Engine Specs
« Reply #10 on: June 17, 2010, 12:59:50 AM »
dw230.....have u had anyone lately?

FREUD
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Offline Joe Timney

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Re: Engine Specs
« Reply #11 on: June 17, 2010, 05:58:53 AM »
What does the SCTA say???
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Offline racer x

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Re: Engine Specs
« Reply #12 on: June 17, 2010, 06:57:42 AM »
I have another wrinkle and since it is a topic of conversation.
   The 80s Yamaha RZ liquid cooled two stroke 350cc MOTORCYCLE ENGINE . was later used in ATVs .The ATV is called a Banshee. The engine is identical to the RZ .Problem is most RZ engines are gone. Is is legal to take a banshee motor and put it in an RZ and run in modified? The only difference would be the cereal number.
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Offline blackslax

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Re: Engine Specs
« Reply #13 on: June 17, 2010, 07:48:50 AM »
I talked to the SCTA and was told no.  Even though the design is completely purpose down from HEAVY crank with the base machined to install the crank and a counter balancer.  custom barrels, pistons, heads, no dice.  I even asked about a full CNC base instead of a modified sled base and was told no.  I was told that if the barrels and the and or some other parts were taken from a bike it MIGHT be allowed.  I guess that since my builder does mostly sled work, they feel I am trying to sneak in a sled motor.

I pleaded my case as far a "purpose built" motor but to no avail.  Which of coarse brought up the same question about 4 times in the conversation, "what about BUB". I was told that bike "barely squeeked by".  The best conclusion I can draw is that a multi million dollar project has more "purpose" than mine.   :cry:
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Offline Warp12

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Re: Engine Specs
« Reply #14 on: June 17, 2010, 08:09:44 AM »
Quote from: racer x on June 17, 2010, 06:57:42 AM
I have another wrinkle and since it is a topic of conversation.
   The 80s Yamaha RZ liquid cooled two stroke 350cc MOTORCYCLE ENGINE . was later used in ATVs .The ATV is called a Banshee. The engine is identical to the RZ .Problem is most RZ engines are gone. Is is legal to take a banshee motor and put it in an RZ and run in modified? The only difference would be the cereal number.

I believe that some of the Banshee's internals are different, such as the transmission. Not sure if that it a stumbling point or not.
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