LIttle bit of wisdom required

[marc]

Whats the best way to find out if you hve a non-standard gearbox ?

whithout actually looking inside it

 

[Fast Guy]

1)Try hitting 60 in 2nd. You have a close ratio box if it won't.
2) Ask the previous owner

 

[marc]

What speed would I get in 2nd then if not 60?

Are we talking like 55mph, or a noticable diffrence?

Thanks

 

[JIMMYBACK]

the top end is only 125 :shock:

 

[Fast Guy]

My RB close ratio box hits about 55ish at 7500rpm in 2nd and topped out at 123mph at just over 7500rpm according to Datron timing gear.

Non standard could also be a Quaiffe with or without standard ratios, Par, PPG or Becker. What exactly do you mean by non standard?

 

[marc]

Well put it this way

Ive done several crail days and one one day I launched it 20 times every time over 4k nothing has gave way yet...

Im just curious as to what box I have thats all ! its not short ratio as I have hit 145 on gps before

 

[gtirneil]

Ive done about 70 launches at between 5-7k :lol: nothings give way yet.


Just means your not trying hard enough :twisted:

 

[KRS]

I managed 29 launches in one day... If only I stopped there...

 

[youngsyp]

Just out of interest, how many rpm does the standard RA and RB gearbox drop the engine when changing up ?

Mine is as follows:

1st to 2nd= 1250 rpm
2nd to 3rd= 1000 rpm
3rd to 4th= 750 rpm
4th to 5th= 750 rpm

How does the Quaife C/R change this ?

 

[Fast Guy]

Just out of interest, how many rpm does the RB gearbox drop the engine when changing up ?

Dunno, I'm normally going to fast to see :lol:

Marc, it's possible you may have a standard box still.