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zx14/ busa diffs
daniel mason - 7/1/09 at 07:48 PM

Anyone have any advice on correct diff for a zx14 or busa engine in 7 type cars? There seems to be so many people with these vehicles and diff ratios seem to vary quite a lot! Thanks guys.

iiyama - 7/1/09 at 08:04 PM

3.14 if you can find one. 3.38 is a good compromise.

daniel mason - 7/1/09 at 08:09 PM

Thanks.The 3.14 seems hard to find and expensive but i will keep a look out for one! Thanks again

Hellfire - 7/1/09 at 08:10 PM

You'll have difficulty getting hold of a 3.14, they're like rocking horse sh1t. A 3.38 diff will be good and are much more common. Usually found in 2.3D Sierras.

Phil

daniel mason - 7/1/09 at 08:13 PM

thanks phil.Is there not a freelander diff with similar ratio?

Steve Hignett - 7/1/09 at 08:15 PM

Freelander Diff is 3.21

Hellfire - 7/1/09 at 08:17 PM

Freelander diffs are 3.21 and non-LSD.

Phil

Simon - 7/1/09 at 08:18 PM

BMW have 100's of ratios, the only probs may be joining bmw diff and Sierra shafts and weight, but price shouldn't come into it.

ATB

Simon

daniel mason - 7/1/09 at 08:18 PM

Would that not be a resonable alternative or are they very expensive too? The freelander i mean!

[Edited on 7/1/09 by daniel mason]

Flamez - 7/1/09 at 08:48 PM

freelander diff seems to be the choice for ZX10R's and can be had for around £100, however if you use sierra hubs you will need custom driveshafts. Mine were supplied by Mac1motorsports.

stuart_g - 7/1/09 at 09:01 PM

You will also have to alter the mountings for the Freelander diff as they are different to the Sierra so get your welder out.

asl - 8/1/09 at 09:40 AM

Hi. I have been trying to change my diff for some time. At present I have a blade engine and a 3.9 diff which is completely wrong for me. I've been looking for a 3.14 but as hellfire says they are like hens teeth. I've also been unsuccessful in sourcing a 3.38. I have found a company who can reratio my current diff. They have said that the 3.14 has started to be remanufactured but would cost around £400 + rebuild costs. They have said that a decent 3.38 should be around £150 + rebuild costs so think I'm going down that route (Unless of course someone wants to buy a 3.9 and someone has a 3.38 to sell!!!)

aka Keith - 8/1/09 at 02:43 PM

quote:
Originally posted by asl
Hi. I have been trying to change my diff for some time. At present I have a blade engine and a 3.9 diff which is completely wrong for me. I've been looking for a 3.14 but as hellfire says they are like hens teeth. I've also been unsuccessful in sourcing a 3.38. I have found a company who can reratio my current diff. They have said that the 3.14 has started to be remanufactured but would cost around £400 + rebuild costs. They have said that a decent 3.38 should be around £150 + rebuild costs so think I'm going down that route (Unless of course someone wants to buy a 3.9 and someone has a 3.38 to sell!!!)


Do you have any idea as to what the rebuild costs will be?
cheers
Craig

asl - 8/1/09 at 05:58 PM

Depending on the condition of the bearings etc. around £150. It's been sent away so once they give me a complete quote I will post on here.

aka Keith - 9/1/09 at 09:51 AM

Thanks ASL,

As an aside did you go to Bruntingthorpe in 2008 to one of the MK trackdays? If you did I think I met you there.

Cheers
Craig

asl - 9/1/09 at 02:29 PM

Hi Craig, yes that was me. May see you at another one as soon as I can get my car off the jacks!!. Cheers Nathan

aka Keith - 9/1/09 at 05:57 PM

Nathan, good to hear that the rebuild is coming along. Hope to see it on the road soon eh?
cheers
Craig

[Edited on 9/1/09 by aka Keith]