Cst4 RB

[lou]

Any one running a cst4 on a RB , what gear ratio can it pull ….Thinking of 4.46

Any info be helpful.

[nsaints]

As no one has replied I'll chip in

1st off I know nothing about RB kits

Other than they come in different capacities - suggest you give some more details of your setup here to receive advise from someone best placed

However, that said, there is some suggested gear ratio's on AF's gear chart here (link below)
CST4 isn't mentioned so you'd need to translate a CST4 to one of the listed exhausts
4.46 is no where close to the suggested ratios, so I'd have alarm bells ringing 4.46 is appropriate

https://www.afrayspeed.co.uk/media/other/53342287/45-tooth-gear-chart1..pdf

[Storkfoot]

It’s designed for the lower end of the rev range but I have no experience of it.

[lou]

No alarm bells … Pulls 4,6 perfectly great pipe for the RB 25 will pull from 40mph Right up to 75mph … don’t get hung up on to many charts speak with people who designed the pipe .