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Angled vs straight pinions effect on arm position


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#1 Highnoon

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Posted 18 April 2019 - 08:37 PM

I have tried both, didnt find much of a difference from a mesh perspective. But, someone commented in a post that an angled pinion will force the armature towards the end bell bearing which makes motor run hotter and is slowe?

Whats your opinion?
Gary Cooper




#2 MSwiss

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Posted 18 April 2019 - 09:07 PM

Put your car on a power supply, and see if it really does that.
 
With a wing car, having maximum tooth engagement is all important.
 
Something being .0001 faster isn't really important, if you are in the pits, changing your spur.
 
Regardless, if angled pinions were really slower and hotter, they wouldn't be outselling straight pinions, which certainly is the case at my raceway.

PS- what I like about a straight pinion with a straight spur, is on a ready to run car, like a JK, I can add a spacer between the spur and the bushing, to tighten up a gear mesh, that has too much lash.

Back with the JK C7, that was real handy, with the motor being soldered in.
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Mike Swiss
 
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#3 Alan Dodson

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Posted 18 April 2019 - 11:47 PM

Are we talking about anglewinders or inlines?



#4 MSwiss

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Posted 19 April 2019 - 01:01 AM

Gary races anglewinders.

Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516


#5 Pablo

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Posted 19 April 2019 - 08:23 AM

someone commented in a post that an angled pinion will force the armature towards the end bell bearing which makes motor run hotter and is slowe?
 

I'd like to see that post, please.

 

I would think a straight pinion in an anglewinder would push the arm in or out under power more than an angled pinion, if anything.


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Paul Wolcott

#6 Half Fast

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Posted 19 April 2019 - 10:08 AM

The post in question was by Dom Loungo in an unrelated thread, it had to do with pinions for inlines.

 

 

Cheers


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#7 Highnoon

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Posted 26 April 2019 - 05:35 PM

Finally got back to slots after Easter festivities. I tested with both angle and straight under power with out a spur and with a spur under power. No difference that I could see.
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Gary Cooper

#8 Fast Freddie

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Posted 27 April 2019 - 08:33 AM

Straight pinion angled spur full tooth contact, angled pinion straight spur not so much.  The angled pinion works best if it engages the spur at the big end of the pinion. I have even used angled spurs with angled pinions just to get a smoother mesh.  I believe the angled pinion climbs the spur unless it's perfectly aligned with the spur gear.  The angled pinion straight spur combo has at least one redeeming quality, it allows for faster spur gear replacement.  It's a much more time consuming process with straight pinions and angled spurs.  To each his own and good luck racing.


Fred Younkin

#9 swodem

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Posted 14 May 2019 - 07:30 AM

...  The angled pinion straight spur combo has at least one redeeming quality, it allows for faster spur gear replacement.  It's a much more time consuming process with straight pinions and angled spurs...

 

FF if you use Drag pinions you can have fast axle and/or gear change with straight/straight option


Steve Meadows


#10 Fast Freddie

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Posted 14 May 2019 - 11:31 AM

No thanks Steve I prefer straight pinions with angled spurs, I like the full tooth contact.  I just deal with the fact that it's going to take longer to change out a spur "IF" it gets damaged.  I once ran a white angled spur gear, ARP or GT-1 don't remember who made them, in 4 different GP12 races and it was still good.  Those were suppose to be the weakest gears on the market.  Just goes to show if you don't get tooth damage and have full tooth contact, well I like my way.


Fred Younkin

#11 gotboostedvr6

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Posted 14 May 2019 - 11:33 PM

If you properly trench your rear magnet a angled pinion will mate perfectly with a straight spur.
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