Board logo

Differences between westfield seiw and sierra sdv
matty h - 30/7/15 at 07:05 PM

Please could someone tell me the differences between the Westfield seiw and the sierra based sdv kit and the pros and cons of each model.
Is there much difference.

Matty

laptoprob - 30/7/15 at 08:04 PM

The pros of the SDV is ease of fit for the Sierra donor parts obviously and will also give you an extra wide rear end but this in turn is a problem.
Most people buy the widetrack conversion for the front for a standard wide track car to bring the tracks more in line and help under steer.
So in short if you buy and off the shelf widetrack conversion it wont work as well as if you had a standard widetrack car(non SDV) or so i'm told.
I have an SDV (without widetrack) and have had the suspension setup by Trevor at Tranzpower in Chesterfield and can manage 1.39 round Cadwell with 2 people so in my eyes unless you are competing for gold at some point its nothing to worry about.
The extra wide rear gives it a great look from the back in my opinion.

Other things to point out are the lovely wide tunnel for the gearbox to which my type 9 fits lovely (think they will take an MT75 too).

It uses the Sierra upright instead of the widely used Cortina but again no big deal, plenty of kit car manufacturers use them.

All in all i love mine and feel no benefit to go and swap it for the standard car.

One last point is the wheel offset which is more limited to ET35-40 at the rear which again hasnt bothered me. I bought 4 x Caterham 13" wheels with ET40 at the rear and they sit great!

Give me a nudge on messenger if i can help anymore.



Standard Wide Body & Mazda SDV
Width (Front) over wheels/tyres (standard track) - 1480mm
Width (Rear) over wheels/tyres - 1620mm
Maximum Width over body - 1640mm
Wheelbase - 2325mm
Overall Length - 3450mm

Narrow Body
Width (Front) over wheels/tyres - ???mm
Width (Rear) over wheels/tyres - 1520mm
Maximum Width over body - 1560mm
Wheelbase - 2335mm
Overall Length - 3540mm

Sierra SDV & Cars With Extra Wide Rear Arches
Width (Front) over wheels/tyres - 1480mm
Width (Rear) over wheels/tyres - 1700mm
Maximum Width over body - - 1720mm
Wheelbase - 2325mm
Overall Length - 3450mm

What’s the smallest trailer a Westfield will fit on?

Bed length - 10’ / 3048mm
Width - For ease of loading I would recommend 3-4” / 75-100mm wider than the width across the wheels.

I want to change my seats, how wide is the cockpit?

Standard Wide Body, Sierra & Mazda SDV’s
Drivers Side - 16.75” / 425mm
Passenger Side (Wide Tunnel) - 16.25” / 410mm
Passenger Side (Narrow Tunnel) - 16.75” / 425mm
Total Interior Width - 39.5” / 1005mm
Transmission Tunnel (Wide Tunnel) - 6.5” / 165mm
Transmission Tunnel (Narrow Tunnel) - 6.0” / 150mm

Narrow Body
Drivers Side - 15.5” / 395mm
Passenger Side - 15.5” / 395mm
Total Interior Width - 36.5” / 930mm
Transmission Tunnel - 5.5” / 140mm
　
How much room is there in the engine bay?

Standard Wide Body, Sierra & Mazda SDV’s
Height from underside of chassis to top chassis rail - 11” / 325mm
Width of Transmission Tunnel Opening (Type9 Tunnel) - 9” / 229mm
Width of Transmission Tunnel Opening (MT75 Tunnel) - 14” / 355mm
Height from chassis rail to underside of bonnet at nose (Kit, ZK and V8 Bonnets) - 8.5” / 215mm

Narrow Body
Height from underside of chassis to top chassis rail - 11” / 325mm
Width of Transmission Tunnel Opening - 9” / 229mm
Height from chassis rail to underside of bonnet at nose (Low Line) - 6.5” / 165mm
Height from chassis rail to underside of bonnet at nose (High Line) - 8.5” / 215mm

[Edited on 30/7/15 by laptoprob]

laptoprob - 30/7/15 at 08:08 PM



[Edited on 30/7/15 by laptoprob]

matty h - 30/7/15 at 08:47 PM

Thanks for the reply.
Looks like there is not much differnence and I should not rule out buying a sdv westfield.

Regards Matty

laptoprob - 30/7/15 at 10:16 PM

quote:
Originally posted by matty h
Thanks for the reply.
Looks like there is not much differnence and I should not rule out buying a sdv westfield.

Regards Matty


No you shouldnt but beware that there is an MX5 based SDV which will restrict you to the MX5 diff etc if you have Ford based stuff to put in.

The engine bay is big enough to put just about whatever you want in too.

Happy hunting....

kingster996 - 30/7/15 at 10:43 PM

The only other thing I'd point out is that most Sierra sdv Westfields will use a diff with push in shafts so makes fitting an lsd unit a little harder, but there are solutions.

I'm perfectly happy with mine

snapper - 31/7/15 at 06:17 AM

quote:

The only other thing I'd point out is that most Sierra sdv Westfields will use a diff with push in shafts so makes fitting an lsd unit a little harder, but there are solutions. I'm perfectly happy with mine


The bolt on shaft diff has the same mountings as push in so I can see no issues fitting them
The hub fittings may be slightly different but not by much

kingster996 - 31/7/15 at 11:34 AM

quote:
Originally posted by snapper
quote:

The only other thing I'd point out is that most Sierra sdv Westfields will use a diff with push in shafts so makes fitting an lsd unit a little harder, but there are solutions. I'm perfectly happy with mine


The bolt on shaft diff has the same mountings as push in so I can see no issues fitting them
The hub fittings may be slightly different but not by much


The diff will fit, but you'll need either hybrid shafts or bolt on shafts and new bearing carriers as bearings/shaft dia differ too (afaik).

I have push in, with a disc brake conversion to drum hubs, so if I want to go LSD on my Sierra SDV Westy, it's hybrid shafts of use Quaife ATB internals with push in shafts.