AAN into Ur quattro, 400-450 Bhp Target

[adam g]

Anyone care to give a brief summary on a conversion to vacuum, what parts need to be swapped. Ive just fitted new WR rear discs and calipers, wish id gone RR now I know the difference.

[AndyP]

Anyone care to give a brief summary on a conversion to vacuum, what parts need to be swapped. Ive just fitted new WR rear discs and calipers, wish id gone RR now I know the difference.

Have a read of this:-

http://www.s2forum.com/forum/showthread.php?t=50533&highlight=vacuum+brake

[DamoM]

Thought I'd give a quick run down as to how we got vacuum brakes into my ur.

We got the vacuum servo from a MK4 VW golf, the bolt pattern is the same as the Quattro. The push rod from the old unit had to be cut off and welded to the new servo

The master cylinder and reservoir is off the MK4 golf

The high pressure hose from the power steering to the rack needed to be made to bypass the hydraulic brake booster. Pirtek did this for £60. We replaced the old power steering reservoir which had too many ports with a Noble M12 reservoir which is the same as a BMW, Landrover, ford etc.......

We removed the ABS module (although you can keep this) and fitted a brake bias valve.

Fitted a 'rigid' vacuum pipe with a one-way valve to the inlet manifold.

We made brake pipes from the master cylinder down to both front callipers. A pipe from the master to the proportioning valve then a pipe from there to the t-piece just in front of the rear diff.

You could probably get away with bending the existing pipes to fit but it will not look great and there is a chance the pipes will crack on these old cars.

Think that was it!

[20Vcqdriver]

Thought I'd give a quick run down as to how we got vacuum brakes into my ur.

We got the vacuum servo from a MK4 VW golf, the bolt pattern is the same as the Quattro. The push rod from the old unit had to be cut off and welded to the new servo

The master cylinder and reservoir is off the MK4 golf

The high pressure hose from the power steering to the rack needed to be made to bypass the hydraulic brake booster. Pirtek did this for £60. We replaced the old power steering reservoir which had too many ports with a Noble M12 reservoir which is the same as a BMW, Landrover, ford etc.......

We removed the ABS module (although you can keep this) and fitted a brake bias valve.

Fitted a 'rigid' vacuum pipe with a one-way valve to the inlet manifold.

We made brake pipes from the master cylinder down to both front callipers. A pipe from the master to the proportioning valve then a pipe from there to the t-piece just in front of the rear diff.

You could probably get away with bending the existing pipes to fit but it will not look great and there is a chance the pipes will crack on these old cars.

Think that was it!

I went and added an electric vacuum pump and switch as I found with a lot of heel and toe work and lots of short burst acceleration to brake to acceleration i lost vacuum in the servo and had a few scary moments with reduced brake performance, no issues since though

[DamoM]

We considered that but I've tracked it a couple of times and experienced no issues so fingeres crossed

How are you finding your turbo? Have yo had your car dynoed?

[20Vcqdriver]

We considered that but I've tracked it a couple of times and experienced no issues so fingeres crossed

How are you finding your turbo? Have yo had your car dynoed?

Mine on SORN at the moment and undergoing some improvements to both main and chargecooler water rads and pipework and head presently away getting perfectly matched to new Wagner exhaust manifold and porting on inlet too....
Hope to get it mapped properly later in year once a new job secured...

[adam g]

Thanks for the run down thats very useful. I would want to keep ABS but you say it can accomodate this, a fair bit of work but seems doable, I here changing the master cylinder is hell of a job though. A project for the autumn I think other wise it wont hit the road this year. I'll stop hijacking your thread now Angus.

[DamoM]

It was the best non-engine related mod I've ever done to the car.. Well worth it.

[URquattroGus]

It was the best non-engine related mod I've ever done to the car.. Well worth it.

My trackday car is emptying my pockets at the moment and taking up all my time. May have to look closer at this when I have a chance!!!

Oh and a coilover conversion, and and and.... I've got this far so why stop now!

[URquattroGus]

Intercooler sizes for those that have asked (twin intercooler setup);

Length :195mm
Core Width :230mm
Width inc end tanks: 350mm
Core Thickness is 100mm

The core sizes are the same on ecah size, but the end tanks obviously vary from left to right.

[URquattroGus]

A small update;

I wanted to chnage my air filter as I throught it was a little on the small side and might be a bit of a restriction. The current one is an Apexi universal with 3" inlet.

To begin with I ordered this filter, and it was a little too wide at the largest point, as you can see, the size difference is pretty massive. It nearly fitted.



In the end I settled for the Green b7.65 as the best compromise;

http://www.greenfilters.co.uk/Universal_Green_Cone_Air_Filters-Single_Cone_Filters-Cylindrical/c622_755_759/p100187/Single_Cone_Filter_(Cylindrical)_-_65mm_Inlet_Dia,_250mm_High/product_info.html?osCsid=o2tfg15iro3tado2lk6grkv0b4

This is listed by them in some places as being sufficient for 565 BHP. It's quite long at 250mm, but inportantly it's not too wide (140mm). As a result it fits on the other side of my heat shield without cutting the wing out.

I didnt take a photo of it alongside the Apexi before fitting, but it is a lot bigger, and surely must have better flow potential.

I also extended my heat shield along and around using aluminum heat shield. I cut out an aperture for the Turbo to MAF hose and top of wastegate to N75 hose.





I also added a 3" cold air feed, which I am taking from the front grille.



Then fitted up the filter and hoses;



The heat shield seems to seal the filter off quite well, and the cold air feed it pointed almost straight onto the filter.

Took the car out, and it was running very well, as strong as ever. Not sure if it's made that much difference, but it can't have done any harm!

It was nice to drive the car for the first time in 3 months after my knee operation, the clutch is pretty heavy when manuvering.

I've spent quite a lot of time on my trackday clio lately, so it was nice to give the car some love and take it out of for the first time since before christmas.

Next thing is to sort the damm brake feel to give me more confidence, and most likely convert the strutts to coilovers, although all these threads about bigger turbo's are distracting!

[DamoM]

A small update;

I wanted to chnage my air filter as I throught it was a little on the small side and might be a bit of a restriction. The current one is an Apexi universal with 3" inlet.

To begin with I ordered this filter, and it was a little too wide at the largest point, as you can see, the size difference is pretty massive. It nearly fitted.



In the end I settled for the Green b7.65 as the best compromise;

http://www.greenfilters.co.uk/Universal_Green_Cone_Air_Filters-Single_Cone_Filters-Cylindrical/c622_755_759/p100187/Single_Cone_Filter_(Cylindrical)_-_65mm_Inlet_Dia,_250mm_High/product_info.html?osCsid=o2tfg15iro3tado2lk6grkv0b4

This is listed by them in some places as being sufficient for 565 BHP. It's quite long at 250mm, but inportantly it's not too wide (140mm). As a result it fits on the other side of my heat shield without cutting the wing out.

I didnt take a photo of it alongside the Apexi before fitting, but it is a lot bigger, and surely must have better flow potential.

I also extended my heat shield along and around using aluminum heat shield. I cut out an aperture for the Turbo to MAF hose and top of wastegate to N75 hose.





I also added a 3" cold air feed, which I am taking from the front grille.



Then fitted up the filter and hoses;



The heat shield seems to seal the filter off quite well, and the cold air feed it pointed almost straight onto the filter.

Took the car out, and it was running very well, as strong as ever. Not sure if it's made that much difference, but it can't have done any harm!

It was nice to drive the car for the first time in 3 months after my knee operation, the clutch is pretty heavy when manuvering.

I've spent quite a lot of time on my trackday clio lately, so it was nice to give the car some love and take it out of for the first time since before christmas.

Next thing is to sort the damm brake feel to give me more confidence, and most likely convert the strutts to coilovers, although all these threads about bigger turbo's are distracting!

Great job Angus.

I think we'll go for something of similar size but as I have no inter/chargecooler down below there's plenty of room just behind the front spoiler so no heat shield required.

[URquattroGus]

Now for sale: http://www.pistonheads.com/classifie...--1984/1553892

[jsws3]

Best of luck with the sale mate as a well sorted ur with care and Attention are hard to come buy .

[DJones]

Now for sale: http://www.pistonheads.com/classifie...--1984/1553892

Best of luck, but how come....