atkin
|
 posted on 13/4/10 at 09:22 PM |
|
|
Which Seirra!?
I've decided on the MK Indy R and want to go down the bike engine route so obviously dont need the engine / gearbox from my donor car.
I do want discs all round just because I hate brake shoes and discs look better, which Seirra's will fulfil my needs?
|
|
|
|
|
Paul TigerB6
|
| posted on 13/4/10 at 09:26 PM |
|
|
Deciding what engine you'll fit, and what ratio diff should be your first port of call.
There are gear ratio calculators about but many on here can help also. Rear disks means an XR4x4 or ABS equipped car so mostly 3.62 or 3.92
ratio's. You may want a longer ratio diff for certain bike engines though which can be done a few ways (but more money - Freelander diff or 3.38
/ 3.14 Sierra diff!!)
PS welcome to the asylum. Ignore the doubters - BEC is best!!
[Edited on 13/4/10 by Paul TigerB6]
|
|
|
atkin
|
| posted on 13/4/10 at 09:31 PM |
|
|
Either Busa engine or zx12
|
|
|
Paul TigerB6
|
| posted on 13/4/10 at 09:38 PM |
|
|
Freelander is a good option with the Busa - its what Westfield use on the Megabusa.
For the ZX12R, i think a 3.62 or 3.38 Sierra diff would be fine. Cant find the calculator i had at the moment - am sure someone will point you in the
right direction soon.
Are you looking for road or track use primarily?? Either engine should be good for about 130mph in a BEC so i'd set the diff ratio accordingly
to do say 130-135mph at max rpm
|
|
|
Paul TigerB6
|
| posted on 13/4/10 at 09:41 PM |
|
|
clicky link to gear ratio calculator
There you go - have a play with that. 195/50/15 or 205/60/13 seems to be the most popular tyre sizes for BEC's
|
|
|
atkin
|
| posted on 13/4/10 at 09:48 PM |
|
|
Thanks what ratio is the freelander diff?
|
|
|
Paul TigerB6
|
| posted on 13/4/10 at 09:54 PM |
|
|
its 3.2:1. You can insert a line into the spreadsheet and manually add the ratio in there.
|
|
|
adithorp
|
| posted on 13/4/10 at 10:10 PM |
|
|
Welcome to the mad house.
Adding your location (roughly) will be usefull as you get into the build. Anybody local might be able to help out that way with any problems.
Make sure you get to Stoneleigh show 2-3 May. There'll be loads of cars to get inspiration from. Have you ridden in a BEC? If not I'm sure
you'll be able to cadge a ride in one.
adrian
PS, Someone will be along soon to tell you a BECs are no good. Don't listen to them; They know nothing!
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
atkin
|
| posted on 13/4/10 at 10:14 PM |
|
|
Thanks, Ive been out in a Yamaha R1 engined mini (cira 550kg) and it felt really good, even with the R1 engine is felt like it pulled fairly well from
low down.
|
|
|
Paul TigerB6
|
| posted on 13/4/10 at 10:26 PM |
|
|
Oh - dont forget the ZZR1400 as well. If your budget stretches to a Busa then the big Kwak should be in the running too.
|
|
|
atkin
|
| posted on 13/4/10 at 10:27 PM |
|
|
I've never seen a 14 for sale on the bay, where else should I be looking?
|
|
|
adithorp
|
| posted on 13/4/10 at 10:44 PM |
|
|
Malc at Yorkshire Engines (member on here) is your man for bike engine packages. Might not be as cheap as e-bay but you get greatl back up and a
warrenty.
Here you go...
http://www.locostbuilders.co.uk/viewthread.php?tid=133584
adrian
[Edited on 13/4/10 by adithorp]
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
|
|
|
Paul TigerB6
|
| posted on 13/4/10 at 10:46 PM |
|
|
link for one a few weeks ago
Also try Andy Bates (AB Performance) and Malc (Yorkshire Engines) - both are forum members, both have superb reputations, and both should be able to
give you loads of help / advice / supply on your engine options
|
|
|
atkin
|
| posted on 14/4/10 at 08:48 AM |
|
|
Ok so lets say i end up with a big bike engine (busa / zx14), I decide to go Freelander diff, what seirra should I buy to get the right uprights etc
bearing in mind i want rear discs?
|
|
|
StrikerChris
|
| posted on 14/4/10 at 11:28 AM |
|
|
quote:
Originally posted by atkin
Ok so lets say i end up with a big bike engine (busa / zx14), I decide to go Freelander diff, what seirra should I buy to get the right uprights etc
bearing in mind i want rear discs?
If thats the case how much of a sierra does the tiger use?Would you be better just sourcing individual parts?Bearing in mind you'll probably end
up overhauling all of them off the donour anyway and you'll be on a q plate?
|
|
|
atkin
|
| posted on 14/4/10 at 11:47 AM |
|
|
quote:
Originally posted by StrikerChris
quote:
Originally posted by atkin
Ok so lets say i end up with a big bike engine (busa / zx14), I decide to go Freelander diff, what seirra should I buy to get the right uprights etc
bearing in mind i want rear discs?
If thats the case how much of a sierra does the tiger use?Would you be better just sourcing individual parts?Bearing in mind you'll probably end
up overhauling all of them off the donour anyway and you'll be on a q plate?
Im building an Indy R not a Tiger, but yeah i was wondering if in my situation it would be cheaper to just by the bits I need...
|
|
|
StrikerChris
|
| posted on 15/4/10 at 04:47 PM |
|
|
sorry,got mixed up somehow!i built my striker which is meant to be sierra based out of a 200sx.i only used the ford rear hubs(about £20 from a
scrapy)and cortina uprights which i stumbled across before the car was scrapped.i'd imagine yours'll be a similar situation but i dont
know...
|
|
|
Paul TigerB6
|
| posted on 15/4/10 at 06:24 PM |
|
|
I'd suggest a XR4x4 rear axle assembly might well be worth considering if you can find one at the right money (I paid £150). You could use the
hubs and calipers, maybe the driveshafts too as the basis for some custom shafts to mate the freelander diff to sierra hubs. If you use a ZX12R then
the 3.62 LSD might even be fine for your use. Not sure of the gearing on the ZZR1400.
You could always sell the LSD diff on as well - probably get more than half of the price of the rear axle straight back.
Does MK give the option of Cortina uprights? I'd be tempted with ali hubs and maybe the uprights too if thats the case.
your bank manager has permission to not like me
|
|
|
