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Old 17th November 2011, 10:20 AM
davidimurray's Avatar
davidimurray davidimurray is offline
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Join Date: Jan 2009
Location: Near Cardiff
Posts: 742
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Quote:
The points for:
Better handling.
More compact and solid mechanical.s
MX5 conceived as a sports car from the outset.
Sierras dissapearing, will be classic status soon.
Donors often have acceptable alloys which can be reused.
All donors fuel injected.
Most donors had ABS.
Some had a limited slip diff.
Wiring loom can be reused.
Seats can be reused.
Can use MX5 uprights, saves fabricating.
I think you can be objective when looking at the points above -
Yes the MX5 was designed as a sports car but in the roadster it is a totally different application - different vehicel, different weight, different CoG, different geometry so I don't think that is strictly fair to compare it with a sierra based car.
Fuel injected - likely to require cat which can be difficult to package and to get to 'light' correctly for emissions testing. also can be more difficult to tune/setup due to ECU - i'm not sure what the MX5 setup is.
ABS - you won't be wanting this on a roadster!
Sierra wiring loom can be reused - no different to the MX5 one really.

Having said all that I would go for an MX5 build if I started afresh simply due to the availability of donor cars.
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