MWSTEWART | 500+ BHP Project | 10/04/2024
Re: MWSTEWART | 500+ BHP Si Project | Cross member 04/06
Thanks guys!
Robbie - We definitely should
How's yours coming along?
Si - it's finished, I'm now holding him up because the dry sump hasn't yet arrived
Today I finished off the mounting for the new cross member.
I wanted to bolt to some existing tabs that protrude down from the chassis legs, so I added some tube to prevent the tabs bending as the bolts are tightened:

I then boxed over them, drilled through, and welded a captive nut to the outside face of the tabs:

Next up is reinforcement of the steering rack mounting area to help further improve steering feel. The photo below is of the area in standard form, it's not particularly clear from the photo but the central 'pad' that the rack mounts to is isolated from the chassis rails either side of it:

The reinforcement piece I made which will link the rack mounts to the chassis rails:

And in place:

I ran out of time today so didn't get chance to weld it in. The above jobs look insignificant but take a fair amount of time.
Robbie - We definitely should
Si - it's finished, I'm now holding him up because the dry sump hasn't yet arrived
Today I finished off the mounting for the new cross member.
I wanted to bolt to some existing tabs that protrude down from the chassis legs, so I added some tube to prevent the tabs bending as the bolts are tightened:
I then boxed over them, drilled through, and welded a captive nut to the outside face of the tabs:
Next up is reinforcement of the steering rack mounting area to help further improve steering feel. The photo below is of the area in standard form, it's not particularly clear from the photo but the central 'pad' that the rack mounts to is isolated from the chassis rails either side of it:
The reinforcement piece I made which will link the rack mounts to the chassis rails:
And in place:
I ran out of time today so didn't get chance to weld it in. The above jobs look insignificant but take a fair amount of time.
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Re: MWSTEWART | 500+ BHP Si Project | More Fab 05/06
This PAS pump stuff is interesting! I might look into this as the pulley of the standard belt driven zetec one i have is sort of in the cover of the headlight!!
I guess it's possible to mount this in the bay. It's a weigh up for me whether it's easier to get an electric one or just modify the headlight cover. Either way some pipework needs adapting. Anyone know the pressure of the high pressure side? I take it you gotta use threaded fittings for this?
Nice work btw
I guess it's possible to mount this in the bay. It's a weigh up for me whether it's easier to get an electric one or just modify the headlight cover. Either way some pipework needs adapting. Anyone know the pressure of the high pressure side? I take it you gotta use threaded fittings for this?
Nice work btw
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Re: MWSTEWART | 500+ BHP Si Project | More Fab 05/06
moondustka :This PAS pump stuff is interesting! I might look into this as the pulley of the standard belt driven zetec one i have is sort of in the cover of the headlight!!
I guess it's possible to mount this in the bay. It's a weigh up for me whether it's easier to get an electric one or just modify the headlight cover. Either way some pipework needs adapting. Anyone know the pressure of the high pressure side? I take it you gotta use threaded fittings for this?
Nice work btw
Thank you. PAS fluid pressure can exceed 1000 psi (70ish bar) depending on the level of assistance/pressure relief valve spring rate. I believe that Aeroquip now manufacture PAS fittings, or alternative you can use a local Hydraulics firm to make you up some swaged hoses. I've used the latter approach in the past.
Another option would be to have an under drive pulley made, or investigate fitment of a PAS pump from another Ford that has a smaller pulley as standard. A lot of the PAS pumps use the same parallel bolt pattern.
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Re: MWSTEWART | 500+ BHP Si Project | More Fab 05/06
Engine mount bridged to inner wing:

Gearbox mount plated over and bridged to inner wing:

Steering rack reinforcement is on:

That's pretty much all the engine bay fabrication complete so now I can finally prep it for paint.
I also did some planning for the cooling system. I bought a Focus and Mondeo radiator pack to have a play around with, as these were the best fit for my engine bay.
Original radiator core: 500mm x 298mm x 27mm
Focus Mk1 core: 600mm x 358mm x 27mm
Mondeo Mk1 & Mk2 core: 620mm x 395mm x 27mm
I managed to get the Mondeo rad to fit however the outlet spigot is too close to the A/C pump. I have found a company who make uprated radiators for the Mondeo, so I have ordered an all aluminum rad with a 50mm core. I can then cut off the spigot and re weld in a slightly higher position.
Gearbox mount plated over and bridged to inner wing:
Steering rack reinforcement is on:
That's pretty much all the engine bay fabrication complete so now I can finally prep it for paint.
I also did some planning for the cooling system. I bought a Focus and Mondeo radiator pack to have a play around with, as these were the best fit for my engine bay.
Original radiator core: 500mm x 298mm x 27mm
Focus Mk1 core: 600mm x 358mm x 27mm
Mondeo Mk1 & Mk2 core: 620mm x 395mm x 27mm
I managed to get the Mondeo rad to fit however the outlet spigot is too close to the A/C pump. I have found a company who make uprated radiators for the Mondeo, so I have ordered an all aluminum rad with a 50mm core. I can then cut off the spigot and re weld in a slightly higher position.
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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
why didnt you jus ask the company that make the rads to move the outlet a bit higher?
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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
jayrs :why didnt you jus ask the company that make the rads to move the outlet a bit higher?
It is an off the shelf product, sold wholesale, so unfortunately wasn't an option.
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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
ah right fair enought, mind you its not such a bad thing, at least this way you can get it how you want it as it might need a tweek here and there which wouldnt of been allowed for if they done it
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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
good stuff mark, looks great, love the many reinforcements
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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
MR2 Guy :good stuff mark, looks great, love the many reinforcements
jonyb4, we all know its you, you have been banned, and all new user accounts will also be banned

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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
You managed to spend anymore time on the project recently Mark? Keep coming back to see updates and am bored of waiting 

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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
SiST :You managed to spend anymore time on the project recently Mark? Keep coming back to see updates and am bored of waiting
Only little bits here and there mate, I'm saving photos for a decent update rather than the small ones I've been making recently. I have changed the engine spec again hence the pistons and rods in the 'for sale' section
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Re: MWSTEWART | 500+ BHP Si Project | Rad etc. 12/06
Engine Bay Preparation
I stripped back to bare metal in key areas of the engine bay, to ensure a good finish.

Air Conditioning Pipes - Test Fit
The AC pipes are from a Ford Puma which has an engine bay that is dimensionally very similar to the Mk3 Fiesta, so only a small amount of bending and reshaping was required. I've ordered some heat shrink to fit over areas which come close to the chassis.


Sealer Application
3M 08800 is regarded as the best sealer available, it's not cheap but the quality and finish is superb - it's OEM for premium brands. A special applicator gun is required and is pictured below.

Engine bay masked off and 'panel wiped':

Sealed



Engine Bay Modifications
I'm relocating the screen wash reservoir to the rear of the O/S wheel arch in order to liberate space for the AC receiver. I added a swaged plate to the O/S inner wing so I can pass a filler tube through, I have Caravan black waste pipe in mind for this.

Bracket for a battery positive terminal. I'm relocating the battery to the boot so this terminal will let me join the existing positive wires to a 300 Amp cable that will run to the boot.

The original steering column was sealed on the bulkhead with a rubber grommet, and the UJ was still left exposed to the elements. The slight play in my UJ was testament to this. Taking inspiration from a later Fiesta I fabricated a shroud on the bulkhead which will enable me to mount a cover for the UJ.

Lower arm points reinforced to chassis leg

Slam panel clearanced for large radiator, and sectioned to be made removable in order to improve access to the radiators and engine. The first photo is of a standard panel for reference.




Painting
In primer

Painted



The rich colour really comes through in this shot:

Independent rear suspension
The next phase of the project is independent rear suspension taken from a Focus. I knew the Mk1 and Mk2 Focus shared an identical rear suspension arrangement aside from the hubs (5 bolt vs 4 bolt) so I bought a very low mileage rear beam/sub frame from a 2009 Focus. It turns out that the Mk2 hubs also have a significant track increase which meant I'd be running too much positive offset on the rear wheels when compared with my existing front axle. The green line in the photo below shows the distance between the lower arm and the hub mounting face:

I bought another rear end, this time from a Mk1 Focus and the photo below shows the dramatic reduction in track width:

A comparison shot. I will use the newer Mk2 subframe and arms but with the Mk1 hubs and my own disc brake conversion.

MIG Welding Aluminium
I wanted to break the dependence I had on local engineering firms for Alloy welding, so I bought some parts for my Mig Welder that will let me perform the job myself; pure Argon, Alloy wire (a general grade), oversize tips, Stainless Steel wire brushes and a Teflon lined torch.

My first Alloy welding job will be to make some radiator brackets for my new radiator. It is an 'uprated' Mondeo radiator, all alloy and double capacity.

50mm vs 27mm core.

I stripped back to bare metal in key areas of the engine bay, to ensure a good finish.
Air Conditioning Pipes - Test Fit
The AC pipes are from a Ford Puma which has an engine bay that is dimensionally very similar to the Mk3 Fiesta, so only a small amount of bending and reshaping was required. I've ordered some heat shrink to fit over areas which come close to the chassis.
Sealer Application
3M 08800 is regarded as the best sealer available, it's not cheap but the quality and finish is superb - it's OEM for premium brands. A special applicator gun is required and is pictured below.
Engine bay masked off and 'panel wiped':
Sealed
Engine Bay Modifications
I'm relocating the screen wash reservoir to the rear of the O/S wheel arch in order to liberate space for the AC receiver. I added a swaged plate to the O/S inner wing so I can pass a filler tube through, I have Caravan black waste pipe in mind for this.
Bracket for a battery positive terminal. I'm relocating the battery to the boot so this terminal will let me join the existing positive wires to a 300 Amp cable that will run to the boot.
The original steering column was sealed on the bulkhead with a rubber grommet, and the UJ was still left exposed to the elements. The slight play in my UJ was testament to this. Taking inspiration from a later Fiesta I fabricated a shroud on the bulkhead which will enable me to mount a cover for the UJ.
Lower arm points reinforced to chassis leg
Slam panel clearanced for large radiator, and sectioned to be made removable in order to improve access to the radiators and engine. The first photo is of a standard panel for reference.
Painting
In primer
Painted
The rich colour really comes through in this shot:
Independent rear suspension
The next phase of the project is independent rear suspension taken from a Focus. I knew the Mk1 and Mk2 Focus shared an identical rear suspension arrangement aside from the hubs (5 bolt vs 4 bolt) so I bought a very low mileage rear beam/sub frame from a 2009 Focus. It turns out that the Mk2 hubs also have a significant track increase which meant I'd be running too much positive offset on the rear wheels when compared with my existing front axle. The green line in the photo below shows the distance between the lower arm and the hub mounting face:
I bought another rear end, this time from a Mk1 Focus and the photo below shows the dramatic reduction in track width:
A comparison shot. I will use the newer Mk2 subframe and arms but with the Mk1 hubs and my own disc brake conversion.
MIG Welding Aluminium
I wanted to break the dependence I had on local engineering firms for Alloy welding, so I bought some parts for my Mig Welder that will let me perform the job myself; pure Argon, Alloy wire (a general grade), oversize tips, Stainless Steel wire brushes and a Teflon lined torch.
My first Alloy welding job will be to make some radiator brackets for my new radiator. It is an 'uprated' Mondeo radiator, all alloy and double capacity.
50mm vs 27mm core.
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
awesome mate great progress does that mean your motor will be dark aubigene
my 2.0 Si was I loved it the colour is sooo nice
especially with white accents sets the colour off
especially with white accents sets the colour off
2.1 Went BANGGGGG now a Ghia 1800
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
HCS PIMP :awesome mate great progress does that mean your motor will be dark aubigenemy 2.0 Si was I loved it the colour is sooo nice
especially with white accents sets the colour off
Cheers
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
Looks mental
A mk3/3.5 with a/c too will be a bit posh
The colour looks gawjus
awaiting more updates 
A mk3/3.5 with a/c too will be a bit posh
The colour looks gawjus
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
Very good work and attention to detail Mark. It had better be ready for Ford Fair this year though.

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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
fudgekin hell the detail and work going into this is unreal
well done sir!
well done sir!
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
Michael! :fudgekin hell the detail and work going into this is unreal
well done sir!
Thanks mate
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
you're the greatest *sucksuck* xoxoxoxoxox

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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
Phenomenal build, have just read through the whole thread, was best way to put in work this morning 
What AC pump did you use in the end ?
Truly gobsmacked at the attention to detail in this (and genuine parts
) funny I came back on after years of being adrift to see the progress on the "Quattro" to find this
awesome awesome awesome
What AC pump did you use in the end ?
Truly gobsmacked at the attention to detail in this (and genuine parts
awesome awesome awesome
Lower than a snakes bollox
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Re: MWSTEWART | 500+ BHP Si Project | Eng. Bay Complete 13/07
Nomad - lol.
Uncle Fester - Cheers! The A/C pump is from a Focus.
Independent rear suspension, Part 1 – Modification of Focus components
My own requirements were that the Fiesta McPherson struts would remain as would the forward mounting points for a Fiesta rear beam, this way I would not be forced to mix and match suspension and as contingency I could bolt up a Fiesta beam should I ever need to. I started by gathering data for the key dimensions of Fiesta and Focus rear suspension so measurements such as distance between trailing arms, strut mounting points, chassis legs, subframe mounts etc. Based on this data I decided that the best way forward would be to modify the Focus suspension to provide standard Fiesta track width, and to achieve this Focus subframe and knuckle/trailing arm assemblies would be modified to suit the Fiesta struts and forward beam mounts.
The first step was to create a jig based on the standard Focus subframe. At this stage I marked on two pieces of steel the position of standard Focus mounting points and also new mounting points at a reduced width which would produce standard Fiesta rear track. I fixed bolts to the Steel and bolted it to the unmodified Focus beam to begin fabrication of the jig, this way I ensured that everything was perfectly parallel. Once that was done I welded on bolts in the shortened position and sectioned the beam to suit.

Jig #1 did its job well: here's the shortened subframe welded together but still attached to the jig.

Next up I went back to the Fiesta beam to make a jig that would help me modify the Focus trailing arms, and my life here was made easier by the fact I'd previously upgraded to a Puma/Mk5 Fiesta beam which actually shares the same hub mounting bolt pattern as the Focus; this allowed me to make a jig to provide the Fiesta lower strut mount and forward beam mount based on the common hub mounting face/bolt pattern. The alternative would be to make a jig based on wheel bolt flange and centreline, which would have taken longer.

Here's the horrific looking but sturdy and accurate jig # 2 in action

The second jig enabled me to fabricate the Fiesta lower strut mounts, shorten the Focus trailing arms, and change the angle of the trailing arms to suit the position of the Fiesta forward beam mount. I decided at this point to sacrifice the Fiesta beam for its front mounts/bushes to incorporate into the Focus arms, and in doing so replaced the trailing arm Focus bushes which are a weak point.

Top: Standard Focus, Bottom: Modified


This image shows the shortened trailing arm, the difference between Focus and Fiesta lower suspension mounts, and the reinforcing I made around the new lower mount. I was conscious here that the majority of load on the Focus system would have been taken by the lower arm that houses the spring, so as I was mounting a McPherson strut assembly in place of a damper, I made sure that the shock mount was of far sturdier construction than the original.

Subframe etc. completed.

Modified knuckle/trailing arm mounted to the Fiesta.

The next stage is to modify the Fiesta chassis to mount the subframe.
Uncle Fester - Cheers! The A/C pump is from a Focus.
Independent rear suspension, Part 1 – Modification of Focus components
My own requirements were that the Fiesta McPherson struts would remain as would the forward mounting points for a Fiesta rear beam, this way I would not be forced to mix and match suspension and as contingency I could bolt up a Fiesta beam should I ever need to. I started by gathering data for the key dimensions of Fiesta and Focus rear suspension so measurements such as distance between trailing arms, strut mounting points, chassis legs, subframe mounts etc. Based on this data I decided that the best way forward would be to modify the Focus suspension to provide standard Fiesta track width, and to achieve this Focus subframe and knuckle/trailing arm assemblies would be modified to suit the Fiesta struts and forward beam mounts.
The first step was to create a jig based on the standard Focus subframe. At this stage I marked on two pieces of steel the position of standard Focus mounting points and also new mounting points at a reduced width which would produce standard Fiesta rear track. I fixed bolts to the Steel and bolted it to the unmodified Focus beam to begin fabrication of the jig, this way I ensured that everything was perfectly parallel. Once that was done I welded on bolts in the shortened position and sectioned the beam to suit.
Jig #1 did its job well: here's the shortened subframe welded together but still attached to the jig.
Next up I went back to the Fiesta beam to make a jig that would help me modify the Focus trailing arms, and my life here was made easier by the fact I'd previously upgraded to a Puma/Mk5 Fiesta beam which actually shares the same hub mounting bolt pattern as the Focus; this allowed me to make a jig to provide the Fiesta lower strut mount and forward beam mount based on the common hub mounting face/bolt pattern. The alternative would be to make a jig based on wheel bolt flange and centreline, which would have taken longer.
Here's the horrific looking but sturdy and accurate jig # 2 in action
The second jig enabled me to fabricate the Fiesta lower strut mounts, shorten the Focus trailing arms, and change the angle of the trailing arms to suit the position of the Fiesta forward beam mount. I decided at this point to sacrifice the Fiesta beam for its front mounts/bushes to incorporate into the Focus arms, and in doing so replaced the trailing arm Focus bushes which are a weak point.
Top: Standard Focus, Bottom: Modified
This image shows the shortened trailing arm, the difference between Focus and Fiesta lower suspension mounts, and the reinforcing I made around the new lower mount. I was conscious here that the majority of load on the Focus system would have been taken by the lower arm that houses the spring, so as I was mounting a McPherson strut assembly in place of a damper, I made sure that the shock mount was of far sturdier construction than the original.
Subframe etc. completed.
Modified knuckle/trailing arm mounted to the Fiesta.
The next stage is to modify the Fiesta chassis to mount the subframe.
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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
Progress is looking good Mark, got a fair bit of modification to do on the rear suspension setup to make it work, but it will be awesome when its done!
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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
Is there any reason behind the bracing on just one side or is it just not finished
as per usual though
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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
Thanks guys
The bracing on one side is how Ford make them, it's the same crossmember used on both Mk1 and Mk2 Focus RS
The bracing on one side is how Ford make them, it's the same crossmember used on both Mk1 and Mk2 Focus RS
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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
lots of thought gone into that,
really hope it takes all the box's for you when its complete marcly poo's!!
really hope it takes all the box's for you when its complete marcly poo's!!
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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
Jesus thats some proper work gone into that!
I wish i had the time, skills and attention span to do that kinda stuff.
I wish i had the time, skills and attention span to do that kinda stuff.

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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
Ratspeed :Jesus thats some proper work gone into that!
I wish i had the time, skills and attention span to do that kinda stuff.
And the money!
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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
DanFraser :Ratspeed :Jesus thats some proper work gone into that!
I wish i had the time, skills and attention span to do that kinda stuff.
And the money!
Yeah that would help too

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Re: MWSTEWART | 500+ BHP Si Project | Rear suspension 18/07
Some new goodies.
6 Pot calipers for the front. AP CP5555 motorsport version:

Brand new (not rebuilt) Genuine Ford Street/Sport Ka steering rack, as the Ka platform is a Fiesta it fit my Si. It's a unique part and is cast from a higher grade alloy and has solid mounts rather than rubber bushes.

Ford Focus RS Gearbox, brand new in the crate. Thanks to Tom Peters Ford parts for this. I have three of these gearboxes now so will have to get around to selling one!

It is essentially a regular 2.0 Zetec Focus gearbox but with shot peened gears and a Quaife LSD. I also noticed that the shift weight is smaller, which is good.



I hope to get the Focus rear suspension finished off this weekend.
6 Pot calipers for the front. AP CP5555 motorsport version:
Brand new (not rebuilt) Genuine Ford Street/Sport Ka steering rack, as the Ka platform is a Fiesta it fit my Si. It's a unique part and is cast from a higher grade alloy and has solid mounts rather than rubber bushes.
Ford Focus RS Gearbox, brand new in the crate. Thanks to Tom Peters Ford parts for this. I have three of these gearboxes now so will have to get around to selling one!
It is essentially a regular 2.0 Zetec Focus gearbox but with shot peened gears and a Quaife LSD. I also noticed that the shift weight is smaller, which is good.
I hope to get the Focus rear suspension finished off this weekend.
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Re: MWSTEWART | 500+ BHP Si Project | New goodies 05/08
- Excursion
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Car: 1990 Ford Fiesta XR2i
Re: MWSTEWART | 500+ BHP Si Project | New goodies 05/08
very nice mark
what size are the brakes? and waht size are the wheels? when i colected my diff off tom he said about the boxes but i was too late to get one as they where all sold
what brakes where you going to use on the front before the ap's?
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2.1 ZETEC TURBO,AREA SIX BITS,PECTEL T2,LIVE MAPED BY AHMED BAJOO AND GROVE GARAGE

2.1 ZETEC TURBO,AREA SIX BITS,PECTEL T2,LIVE MAPED BY AHMED BAJOO AND GROVE GARAGE

- robp-tt
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Re: MWSTEWART | 500+ BHP Si Project | New goodies 05/08
Cheers guys!
Front wheels are 16's and the discs are 325x28.
I have a set of AP 4 pots for the front with 304x25 discs which I will advertise as a bolt on kit at some point. I was going to use these before the 6 pots.
Front wheels are 16's and the discs are 325x28.
I have a set of AP 4 pots for the front with 304x25 discs which I will advertise as a bolt on kit at some point. I was going to use these before the 6 pots.
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Car: 1990 Ford Fiesta XR2i
Re: MWSTEWART | 500+ BHP Si Project | New goodies 05/08
Today I've been working on mounting the Focus sub frame.
First off I had to notch a horizontal chassis member at each end to provide clearance for part of the new sub frame. The loss of strength isn't an issue for me because the two lateral members on the Focus sub frame will make the rear end more rigid than it ever was in standard form. I also had to cut out a section from each side of the main chassis rails in order to make a level bed for the sub frame as the rails slope down from the rear of the car towards the petrol tank area, you can make this out in the foreground of the photo.

Here's the rear end temporarily mounted, you can see the parts of the sub frame that sit in the new notches:

From the front.

Slightly more advanced than the old twist beam!

First off I had to notch a horizontal chassis member at each end to provide clearance for part of the new sub frame. The loss of strength isn't an issue for me because the two lateral members on the Focus sub frame will make the rear end more rigid than it ever was in standard form. I also had to cut out a section from each side of the main chassis rails in order to make a level bed for the sub frame as the rails slope down from the rear of the car towards the petrol tank area, you can make this out in the foreground of the photo.
Here's the rear end temporarily mounted, you can see the parts of the sub frame that sit in the new notches:
From the front.
Slightly more advanced than the old twist beam!
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Car: 1990 Ford Fiesta XR2i





