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Re: [Healeys] BJ7 - CLOSE RATIO GEARBOX

To: "scott@scottjgraham.com" <scott@scottjgraham.com>
Subject: Re: [Healeys] BJ7 - CLOSE RATIO GEARBOX
From: Chris Dimmock <austin.healey@gmail.com>
Date: Sun, 20 Sep 2009 21:26:01 +1000
Ok, no knowledge or a HCCR gearset Scott.
But why would you want one?
Arrrrh just be a man!!!!
Years of marriage should have got us all used to most of the whining  
we blokes "hear" in/ about our Healeys coming from inside the cockpit!!!
Do - anything that helps you tune out the whining from the passenger  
seat is good. As chopper said... "Just harden the F*** up"!!*
Lol *google chopper read harden up YouTube. Lol
Seriously. 1st gear in all healey gearsets is straight cut.  
Potentially noisey. A std gearset is HCSR where "h" is for for  
helical, "c" for cut, "s" for std, "r" for ratio. And 4th gear is  
direct drive so generally no noise, 3rd motion shaft is locked solid.
The only gearbox noise from a SCCR ("s" for straight, next "c" for  
cut, next "c" for close, "r" is still ratio)  box is 2nd and 3rd are  
also straight cut, like first, and so still is the constant engagement  
gear.
So - in my experience, It's about tolerances and assembly. And top is  
quiet, as it's the constant engagement gear, where the 3rd motion  
shaft is locked.
I defy most people to pick I have a SCCR box in my BJ8. Especially  
over the induction roar of the webers, and the growl of the side  
exhaust.....
I still have a NOS HCCR gearset for a 1275 sprite. The reason I never  
used it is as above. Why bother? It's a sportscar. And if you have a  
weber, and a loud exhaust, and the roof is off..... It's just another  
instrument in the orchestra.....
Straight cut gears have a stronger/ broader tooth "connection" (root)  
to the  gear ring/ shaft and can take more torque. That's why you use  
them in a modified healey.
But if you want my Ultra rare HCCR spridget gearset.., ha. Form a  
queue!!  First person to tell me the part number for a HCCR gearset  
for a 1275 spridget earns some serious respect. I suggest you use the  
rocking horse s*** and other non existent parts book first!!
;-)
Chris
www.myaustinhealey.com

Sent from my iPhone

On 20/09/2009, at 7:24 PM, Ingrid & Scott Graham <isgraham@yahoo.com>  
wrote:

> My gearbox is nearing its next rebuild.  I am keen to move to closer  
> ratio
> gearing - like most not thrilled with low 1st & big gap 2nd to 3rd.
>
> My mate has a box rebuilt with close ratio gears - but they are  
> straight cut
> and make a helluva racket - very loud whine.
>
> But he tells me that there are now standard (not straight cut)  
> closer ratio
> gears available.  Anyone on the list than can give me guidance on  
> this?
>
> Thanks
>
> Scott Graham
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