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Hypoid vs. non-hypoid


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#1 40degreerake

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Posted 05 January 2020 - 05:31 PM

Hypoid and non-hypoid? Thanks in advance.
Rick Peller




#2 slotbaker

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Posted 05 January 2020 - 05:34 PM

In-line motor / axle arrangement.

Non-hypoid = Axle and motor centrelines at same height from racing surface. (on same plane)

Hypoid = Motor centreline lower than axle centreline, by about 1~1.5mm. (different planes)

 

Hypoid allows the motor to sit lower in the chassis for lower CofG, allowing the use of larger dia tires if needed.

 

If needed the motor/motor bracket can be angled down at the front to get lower CofG, if using extra large rears.


Steve King


#3 40degreerake

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Posted 05 January 2020 - 05:46 PM

Understood, thank you. One more question with a hypoid mount, is that when you use one of those conical pinions?
Rick Peller

#4 slotbaker

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Posted 05 January 2020 - 05:57 PM

Best results from angled pinions, but parallel pinions can work if the offset isn't too great.

 

Some guys (me included) use parallel pinions with a tight-ish mesh, then run the motor slowly while heating the crown gear over a candle to form the teeth.

It does work, and you can hear the gears quieten down when the gear gets hot enough. Remove the heat and keep running for a few seconds until the crown cools down.


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Steve King


#5 Tim Neja

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Posted 05 January 2020 - 05:58 PM

We always use the conical pinions. 


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She's real fine, my 409!!!

#6 Cap Henry

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Posted 05 January 2020 - 07:59 PM

Use a Swiss or Rgeo angled bracket, use a straight pinion, awesome gear mesh every time.
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