DixieTheKid
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| posted on 20/9/11 at 08:07 PM |
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Westy Ratio Help - Suggestions Please
Evening all,
I'm pretty pants went it comes to ratios etc so im open to all options/opinions regarding my build.
I have a YB Cosworth Lump which will be coupled to a T5 gearbox. I have a 3.14 diff which im going to sell and purchase a LSD. What would be the best
ratio diff to try and get bearing in mind i want to put some big alloys on it which leads me onto another question, whats sensible size wheels can be
used to fill the arches?
I suppose i should add that the Westy is going to be a bit of a road toy, is not going to see the track that often so it need to be drivable if that
makes sense?
Cheers Chris
[Edited on 20/9/11 by DixieTheKid]
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Andy B
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| posted on 20/9/11 at 08:31 PM |
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I am afraid I can't help with the ratio side of things but I do have a customer who would be interested in the 314 diff if that helps
Regards
Andy
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DixieTheKid
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| posted on 20/9/11 at 08:47 PM |
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quote:
Originally posted by Andy B
I am afraid I can't help with the ratio side of things but I do have a customer who would be interested in the 314 diff if that helps
Regards
Andy
Thats diff is drumming up a lot of interest. U2u offer if you like.
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Gary 7
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| posted on 20/9/11 at 09:13 PM |
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For the diff ratio if using ford lsd its 3.62 and 3.92 i think. Try this gearcalc , input wheel tyre sizes diff ratios choose gearbox t5 from the
list
http://locost7.info/gearcalc.php
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Chippy
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| posted on 20/9/11 at 09:50 PM |
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Using the Cossy I would stick with the 3.14 and get an LSD fitted to it. I have the V6 Cossy and am fitting a 3.14 with after market LSD, because the
3.62 LSD just is not long enough. HTH Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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westy turbo
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| posted on 21/9/11 at 04:40 AM |
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The 3.92 with a T5,works awesome,the only think is it redlines at about 225-230 but how often u going to need more 
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snapper
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| posted on 21/9/11 at 06:25 AM |
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Let me assure you, you don't need a 3.14 with that gearbox.
The 3.9 is an option but with the Cossy torque a 3.6 will be good for 1st 2nd and 3rd by then you'll be going quick, 4th will take you to any
speed quickly and 5 will be a long cruise gear.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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mcerd1
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| posted on 21/9/11 at 10:48 AM |
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all the rwd sierra cossie's uesd a T5 with a 3.64 LSD (7.5" ) as standard
so you shouldn't be far off the mark with a 3.62 diff for road use - it'll depend a little on your tyre size but you can always go up or
down a size/profile for the fine tunning
the standard cossie's use 205/50 R15 tyres - so that'll give you a benchmark
e.g. a 245/45 R16 would be effectivly 7% higher geared than the origonal cossie, but a 185/60 R13 would be ~6% lower geared and so on...
[Edited on 21/9/2011 by mcerd1]
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DixieTheKid
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| posted on 21/9/11 at 06:36 PM |
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Whats the norm with regards to wheel size for a 7 or isn't there?
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mcerd1
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| posted on 22/9/11 at 07:13 AM |
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not really a normal for a seven as such - most are between 13" and 15" wheels but with all kinds of widths and tyre sizes
I think most of the westfield's use similar sizes but I've no idea what they are 
(might be worth asking some of the guys on the westie forum, I know a few of them have YB engines as well)
the ones I do know are the dax's, but they are generaly much bigger. the wide rear arch option is just big enough for 9.5" - 10"
wide rims - some folk run as big as 255/40 R17's  (mine are 'only' 245/45 R15)
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westy turbo
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| posted on 22/9/11 at 03:14 PM |
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8x13 to the front,10x13 rear for my westy ,or go to 15"
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DixieTheKid
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| posted on 22/9/11 at 04:15 PM |
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Thanks for that info. Had a lot of interest in the diff, please note its sold. Cheers chris
[Edited on 22/9/11 by DixieTheKid]
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