Hi Guys
Me again!

which ratio lsd is best 3.62 or 3.9 for bec with zx9 engine and 13" rims.i`m a little confused with all this ratio stuff
any advice greatly recieved
cheers
Sting

With 13" rims, you'll probably want the highest rear diff available, especially as a ZX9 has quite low overall gearing. Don't forget that highest geared = lowest number, so a 3.6 is higher geared (so higher top speed but slightly slower acceleration) than a 3.9, so I'd go for a 3.54 which is the highest you'll get for an Escort live axle.

Chris

Thanks Chris
Top man i appreciate the advice

Regards
Sting

Sting,

I'm assuming from the ratios your quoting that you're using a Sierra diff. I've done a bit of homework over the past few weeks on gearing as I too have a ZX9C2 engine, but I'm stuck with an Timken (English) diff in which 3.54 is the tallest ratio I can find. But ideally you & I ideally need a Sierra 3.14:1.

Drop me your email address and I'll send you copies of the graphs I've done, etc.

Regards
Adrian

Hi Adrian E-mail on its way.
Cheers
Sting

Sting,
Got your message. Hope what I've sent makes sense. Get in touch if you have any problems.

All the Best
Adrian

Yup,
It does make sense.
Seems great just need to find a diff!
Thanks
Sting

Hi!

Was there any Sierra with 3.14 diff? Which one?

Thanks
Joćo Caldeira