Close ratio gear set ?

[Hamish]

Sticking this in general as it’s applicable to most if not all tr2-6

does anyone have any experience of the close ratio box. 
I am trying to work out if there could be any benefits to my sprints and hillclimb but very concerned that the high 1st would ruin my currently good starts. 
I don’t do circuit racing and most of my courses are tight and twisty ( you’ve seen my videos!) 2nd takes a battering too.
 

I believe I have the Early tr6 ratios ( yellow)

and the Close Ratio is the dolomite (green)

For those interested I run a 4.1 diff

and 185/55x15 tyres so my terminal speed are very low  

I just don’t know the characteristics of the CR gear cluster  

 Can you shed any light on it?

[ianc]

You could consider the 4.55 axle ratio found in the Vanguard Sportsman and Overdrive Ensign, or even the 4.875 which Tony Sheach uses in Beastie - I think that may come from a van!

Combine this with a 28% overdrive and you might still arrive on time for your events, and yet be able to make a very rapid start!

Ian Cornish

[Hamish]

Thanks Ian 

but just moved to 4:1 and I think the gearbox needs attention as I think I have killed 2nd synchro 

Also considering a non 0d box for less to go wrong

( I use 185/70x 15 tyres on the road) so gearing slightly better here. 

[Bill944T]

I posted this in 2013 but it didn't attract any comments Hamish. I too wonder what it'd be like up Shelsley Walsh!

Regards

Bill 

[Hamish]

I find this calculator really useful as it’s easy to change variables diff tyres etc

https://www.blocklayer.com/rpm-gear.aspx

The issue with sprints and hillclimbs is the drive off the line. 
so CR 1st is all wrong