Gear Monkey
|
| posted on 29/4/14 at 06:49 AM |
|
|
Decision made.....I think!
After much umming and ahhing and about 1 million google searches I think I'm set on R1 power for my scratch build car, so all the MX5 components
I had ready to fit are shortly to be hitting ebay. We start welding today but as yet I'm unsure on the diff and that is my question. Ideally I
want something very light with a ratio around 3.2 which looks like it will be a good compromise for road and track use. Ideally the donor or
manufacturer will also have suitable (light ish) driveshafts and uprights to suit. I've been trying to think outside the box such as Audi
quattro, Rav 4, CRV but don't yet have all the info needed to find the right solution. I have a friend of a friend who owns a huge scrap yard
with a high turnover so finding the parts shouldn't be a major issue. Any advice would be gratefully received and pictures of similar installs
would be awesome.......I'll post up some pics of the build later 
Paul
|
|
|
|
|
HowardB
|
| posted on 29/4/14 at 07:05 AM |
|
|
Suzuki carry van,... ?
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again and goes zoom)
|
|
|
ian.stewart
|
| posted on 29/4/14 at 07:55 AM |
|
|
Suzuki Cappuccino. They have a small IRS
Something different, Very different..............
|
|
|
adithorp
|
| posted on 29/4/14 at 12:06 PM |
|
|
Good choice. If you make it to Stoneleigh show this weekend you're welcome to a nosey around my R1.
I'll be on the JPSC pitch (no10 I think) under the phone masts.
I'm running a Freelander 3.21 quaife diff. Ally case so light and a common choice. You'd need to source shafts. The Fury uses a custom
length but the spline for the Freelander inner joint is the same as the Sierra push in shafts so they can be swapped over (with a little work).
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
tims31
|
| posted on 29/4/14 at 12:25 PM |
|
|
I have a couple of drive shafts spare that Steve made for me that were too long/short for the diff position. These could be cut to suite the correct
length and sleeved as they are done by Fury. Push in shafts for a Sierra Diff
Build: http://www.martinsfurybuild.co.uk/
|
|
|
adithorp
|
| posted on 29/4/14 at 08:57 PM |
|
|
I've got a spare Freelander open diff if you're interested. I bought it freshly recon'ed and it did about 500 miles before I swapped
it for the quaife one.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
Gear Monkey
|
| posted on 29/4/14 at 09:10 PM |
|
|
Thanks guys for the offers of help, massively appreciated. The freelander diff? So would this use ford drive shafts as mentioned? or do you use
freelander shafts, uprights, hubs, brakes, etc? If so are these fairly light items?? Ideally we're looking to achieve as light a car as
possible.
Thanks for your help
Paul
PS. How much for the diff??
|
|
|
adithorp
|
| posted on 29/4/14 at 09:44 PM |
|
|
quote:
Originally posted by Gear Monkey
Thanks guys for the offers of help, massively appreciated. The Freelander diff? So would this use ford drive shafts as mentioned? or do you use
Freelander shafts, uprights, hubs, brakes, etc? If so are these fairly light items?? Ideally we're looking to achieve as light a car as
possible.
Thanks for your help
Paul
PS. How much for the diff??
Freelander is 3.21:1 so good ratio for R1. Brakes NSL at the limiter in first (to be honest 1st is a bit long). Just over 7000rpm at 70mph. Tops out
just shy of 150mph.
You need to use the Freelander inner driveshaft joint at least. Normally/commonly people use it in place of the much heavier Sierra diff so make up
hybrid shafts (Sierra/Freelander) as they have Sierra running gear. The Ssierra push in and Freelander joints are the same spline so easy to
interchange. There's no reason you couldn't have custom shafts to mate to MX5 hubs or anything else. Don't know of anyone using the
Freelander hubs.
Don't know the weight but it's lighter than the Sierra. I could weigh it tomorrow (if I remember).
I was thinking £100 plus delivery but could bring to Stoneleigh. They're around that for used/high mileage ones on e-bay and this is low mileage
since recon as new.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
Gear Monkey
|
| posted on 30/4/14 at 10:21 PM |
|
|
Thanks! I'll run it past my brother (we're joint funding / building the project) but that sounds good. I'm currently investigating
how I can get the weight as low as possible so looking into all the major (and minor) components such as uprights, calipers, wheels, etc.
Any advice is greatly recieved
Paul
|
|
|
adithorp
|
| posted on 30/4/14 at 10:58 PM |
|
|
My scales are pretty crap (couldn't find the good ones) but weighed it at 17-18kg which ties in with the 17kg I traced in a thread on here. The
Sierra one is 25-30 depending on version (7 or 7.5" ) I believe though I can't confirm that; One thread in my search said it was 7kg
heavier but didn't specify which version.
If you want it bringing to Stoneleigh I could do with knowing by Friday.
[Edited on 1/5/14 by adithorp]
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
Gear Monkey
|
| posted on 1/5/14 at 08:21 AM |
|
|
U2U on it's way
|
|
|
Gear Monkey
|
| posted on 1/5/14 at 12:11 PM |
|
|
Guys......If you look here....
http://www.locostbuilders.co.uk/viewthread.php?tid=165078
And go to the bottom thread you will see pictures of my back end design. The vital outer dimensions are the same as the saturn (book) chassis only
I've beefed up the rigidity with some triangulation without adding any major weight. Will the free lander diff sit in this space ok with
suitable brackets/mounts holding it in place??
Thanks for your input fella's
Paul
|
|
|
adithorp
|
| posted on 1/5/14 at 03:08 PM |
|
|
On next doors scales the Freelander diff weighed 15kg.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
Gear Monkey
|
| posted on 1/5/14 at 10:10 PM |
|
|
Paid!!!
My Diff housing is based around the dimensions of the Saturn chassis so while the lower wishbone mounts are spaced as per the book the upper mounts
are considerably wider apart. As I'll now be using a freelander diff to provide the right ratio for the bike engine what do you guys suggest? Do
I design wishbones based around the mx5 (saturn) dimensions but to suit Sierra drive shafts which as I understand can be used with the freelander
diff? Or do I re-engineer the back end to accept standard wishbones?? I'll be making the wishbones myself either way.
Thank for your help
Paul
PS. Going to have to remove the f*****g FU2 - 3 which aren't sitting square enough for the front wishbone mounts....Having researched this it
seems it's very common and an error in the book 
|
|
|
Gear Monkey
|
| posted on 1/5/14 at 10:44 PM |
|
|
Thinking about it......... Would it be possible to merge my MX5 driveshafts to freelander shafts??? Problem solved surely???
Thanks
Paul
|
|
|
adithorp
|
| posted on 2/5/14 at 10:59 AM |
|
|
Should be possible . Will either need to cut and shut/slieve on of each shaft or have custom shafts shafts made to fit the joints.
Personally I'd prefer the custom shafts as they'd be lighter and stronger. Can't remember the name of the recommended company for
them (rdodger on here had some made I think for his GTM so might be worth a u2u to him)
Diff on it's way.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
Gear Monkey
|
| posted on 4/5/14 at 06:49 AM |
|
|
It's all coming together
Engine acquired : Low miles complete zx9r from a 2004 which will actually run on the bench so nothing much needed there
Diff : Freelander
Uprights : mx5 although I'm investigating lighter alternatives (any suggestions welcome)
The chassis is coming together nicely. I had to remove fu2-3 and replace as these did not sit square (book error). I removed one at a time and as I
have the aussie mods diagonal brace in place the chassis didn't lose shape. I milled new parts and clamped them in place to the other wishbone
pick ups to ensure total squareness. Later today I'll finish taking up the diff housing, add a few other chassis rails and maybe look at
plotting out the tranny tunnel. I have none of my components yet (in the post) so any location info for freelander diff and zx9r engine regarding
tranny tunnel would be gratefully received. Once I figure out where to post pics to host etc I'll get some up
Paul
|
|
|
