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Gearing.....
clairetoo - 9/6/08 at 08:42 PM

Now that I can finally thrash my car , I`ve found a bit of a problem - its too fast !
By that I mean the gearing is way too high - it will do 70 in second , nearly a ton in third , and so far I`ve had 120......in fourth and still pulling like a train
I`ve already bought a 4.1 diff off fleabay to replace the 3.89 thats in there , I'm even wondering about going lower ?
Anybody got a guide to working out theoretical speeds/gearing type calculations ? I`m not too good at that sort of thinking

David Jenkins - 9/6/08 at 08:47 PM

This is good...

GearCalc

Used by quite a few folk on here, I believe...

David

mackei23b - 9/6/08 at 08:47 PM

By my reconing and what you have said, with the 4.1 fitted you'll top out at 66 in second if that helps?

BenB - 9/6/08 at 08:52 PM

You sure you're speedos not reading wrong?

clairetoo - 9/6/08 at 09:05 PM

quote:
Originally posted by BenB
You sure you're speedos not reading wrong?

Nope - pushbike speedo , checked with a satnav.......

clairetoo - 9/6/08 at 09:19 PM

quote:
Originally posted by David Jenkins
This is good...

GearCalc

Used by quite a few folk on here, I believe...

David

Thanks for the link - that is just what I need !
I`ve had a quick play , and it looks like I need a 4.5 diff.......
That would still give me 130mph at 7000 - sounds about right to me , but where can I get one of those cheap

mediabloke - 9/6/08 at 09:37 PM

quote:
Originally posted by clairetoo

I`ve had a quick play , and it looks like I need a 4.5 diff.......
That would still give me 130mph at 7000 - sounds about right to me , but where can I get one of those cheap


Elsewhere on the web, someone suggested that you can get a 4.5:1 Subaru diff. I'd guess you'd have to source some custom driveshafts, unless you got lucky with the Subaru track...

clairetoo - 9/6/08 at 09:44 PM

quote:
Originally posted by mediabloke
quote:
Originally posted by clairetoo

I`ve had a quick play , and it looks like I need a 4.5 diff.......
That would still give me 130mph at 7000 - sounds about right to me , but where can I get one of those cheap


Elsewhere on the web, someone suggested that you can get a 4.5:1 Subaru diff. I'd guess you'd have to source some custom driveshafts, unless you got lucky with the Subaru track...

Its a live axle car........so thats not really an option
A quick search of fleabay , and I`ve found a 4.44 already !
Any one need a 4.1 (when it turns up , I've not even got it yet ! )

mediabloke - 9/6/08 at 10:02 PM

Sorry - v. good point.

V6, live axle, 120mph in 4th... sounds like sideways fun.

[Edited on 9/6/08 by mediabloke]

Volvorsport - 9/6/08 at 10:48 PM

id keep the gearing like that .

1st might endup being all wheelspin !

DIY Si - 9/6/08 at 11:45 PM

That sounds similar to the gearing I'm planning for my Epona. It should have 63 in 2nd, 91 in 3rd, 124 in 4th, and top out in 5th/6th, depending upon gearbox, at 152. That's running a 3.62 diff with 15"wheels.

clairetoo - 10/6/08 at 06:06 PM

quote:
Originally posted by Volvorsport
1st might endup being all wheelspin !

And that would be a problem because...?