Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Donor cars
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 15th August 2013, 12:27 PM
jps jps is offline
Senior Member
 
Join Date: May 2012
Location: Colchester, Essex
Posts: 439
Default

I guess using Sierra bits as much as possible means you can use the Book designs for the wishbones etc, same argument for using MX5 bits - and the designs people have come up with for Mazda based builds.

If you start using other donors you'll presumably need to compensate for different suspension geometry and change the designs, which would be well beyond me, although perhaps you are happy to do so?

Sounds like using a custom bell housing to allow the use of a Ford box would be an easy way to get the engine you want - and allow you to follow the Book design faithfully - but as you say all you then want is the Omega engine...

Whereabouts are you? I've got a Sierra with the engine and box removed if you are thinking of getting hold of some Ford running gear for your build...?
Reply With Quote
  #2  
Old 15th August 2013, 05:07 PM
locost-turbo locost-turbo is offline
Member
 
Join Date: Aug 2013
Location: gedney, lincs
Posts: 50
Default

hi all

thanks for the updates. I am worried that the ford box will break without spending a grand on it. I am hoping that the r28 gearbox will handle the saab lump because its soooo much lighter that the omega bus.

looks like I just need gearbox diff and prop from the omega. and try to find a cheap seirra. I am in gedney. so north cambs/ south lincs. and will need everything other than the engine and gearbox.

as for engine mapping it will have to be restricted in first and second for sure and r888's on the back :0).

email sent to handy andy for a price of pre cut kit. build table to be collected at the weekend.

now for some welding practice
Reply With Quote
  #3  
Old 15th August 2013, 05:19 PM
locost-turbo locost-turbo is offline
Member
 
Join Date: Aug 2013
Location: gedney, lincs
Posts: 50
Default

or to keep it really simple keep my eyes pealed over next year for a race spec ford box there's lots around. means I can crack on with the build knowing that ill need a decent box. save hassle of hydraulic cluth as well.

money ill save on buying an omega will go halfway towards the parts to rebuild a t9. at least I can pick my ratio's if I build one myself.

I am not brave enough to go where noone has been before. suspension geometry is not my specialist subject I am afraid.

thanks again
Reply With Quote
  #4  
Old 15th August 2013, 07:28 PM
beardydave beardydave is offline
Member
 
Join Date: Oct 2012
Location: Fareham
Posts: 73
Default

Having gone down the route of trying to fit in a BMW 750 rear diff and giving up on drive shaft lengths and off-set input flanges wanting to occupy the same space as my left kidney...

I've gone down the Ford diff route, simply because the chassis is designed for it already.

This way I just have to modify the prop-shaft to meld the BMW and Ford shafts, rather than two driveshafts. And i'd have to shorten the ford shaft for a standard build anyway.

The advantage of the Ford diff is the abundance of cheap LSDs from the cosworths. For the omega diff you'd need to get one from quaife. £££

Plus the quaife one will be an ATB diff which won't be much use once both wheels are spinning. I believe the Ford Cosworth diff is a proper plated diff which will keep the rear axle locked even after you've broken traction.
Reply With Quote
  #5  
Old 15th August 2013, 07:41 PM
locost-turbo locost-turbo is offline
Member
 
Join Date: Aug 2013
Location: gedney, lincs
Posts: 50
Default

thanks for that. I think I will go down the ford route. no learning all that is ford geearbox. t9, t5? mt75. but again think the stronger gearboxes are bigger and need chassis mods.

if it was my second build I would not be phased but first one. prob should follow the book as best I can

n
Reply With Quote
  #6  
Old 15th August 2013, 09:22 PM
beardydave beardydave is offline
Member
 
Join Date: Oct 2012
Location: Fareham
Posts: 73
Default

That's been my plan.

Next build will have an aluminium chassis with wider transmission tunnel to take the bmw diff, and wider rear and front track to compensate. And integral roll cage designed in from the start, and possibly fuel tank relocated within the wheel base.

Reply With Quote
  #7  
Old 15th August 2013, 10:34 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,393
Default

the only type 9 that will take big power will be a quaif one. you won't see change from a few grand.

MT75 will last ok but it's a fixed belhousing unless you find or buy one of the special non integral boxes.

T5 is more than man enough , and there is more than likly a belhousing out there.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost £4181.65 - Last - Wheel Cylinders
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 02:12 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.