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EPS Motorsport Audi S1 V8

336K views 217 replies 77 participants last post by  Jesse TREX  
#1 ·
Hi All
I have been building this S1 Project for some time now and I thought you might like to follow its progress. I come to England in 2000 and my first customer I went to see was Keith Murray from Dialynx Performance. Then after him letting me have a drive of his 700hp hill climb car I was hooked! I had to have my own.

So I wanted to build some thing fast!! So it’s going to be an Audi S1 with a V8 twin turbo.

If you know the car please don't post any pics as I want to show you why it has taken 7 years to make LOL
 

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#7 ·
Rear Suspension being made, Arms are from an early F1 and the hubs are custom to hold the Audi hubs and drive shalf's. There are plenty of adjustments for camber, caster and toe
 

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#8 ·
Dampers are 150mm travel connected via bell cranks with needle rollers for less resistance. Once through the bell cranks it makes for 100mm wheel travel and 150mm shock travel.

The diff is made to slip out the side of the chassis by removing the rear mount if it ever breaks LOL
 

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#9 ·
Some thing to crunch the gears with!! I had to change this to allow the gate to work correctly. It allows the reverse gear to be locked out also. Had to change the cables to suit the new position in the car also had to change the connections on the gear box to allow the fitment of the cables also. Looks good and I hope it works okay?
 

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#10 ·
Brakes are all Brembo units 4 piston all round as I wanted to have big units on the rear as 4wd car can use this to help the total braking force of the car! Rear rotors are 305mm and the front are 355mm units all to go over 16 inch wheels. Just because that’s the most common size for Avon Slicks
 

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#14 ·
Inlet manifold is a work of art! as it was made by Dacar Motorsport in Brazil. The two halfs are made from a solid block of Alloy.

Inside the manifold it also has ram tubes for the inlet runners, two injectors per cyl and it also uses a 85mm Drive By Wire Throttle also
 

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#15 ·
New fuel rails being made! As I stock these in 1 meter lengths I also have the profile drill for the two injector sizes 14mm and 11mm

Ends are going to be -8 inlets and -6 returns

I also have an injector flow tester and cleaner from ASNU so all injectors where cleaned before fitting into the manifold. Injectors are going to be 1000cc each so 2000cc per cyl
 

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#16 ·
Fuel Pressure Regulator, I am going to use 3.0bar fuel pressure as this gave the best atomisation of the fuel at this pressure. Used a high speed camera to check the pattern's at different pressures.

Also I am going to add a fuel pressure sensor and fuel temp sensor to the spare plugs on the regulator
 

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#17 ·
The dry sump system is a load of work to add but as the car will be under high G forces it best to invest the ÂŁÂŁ in a good system other wise you will smash the engine up in no time with oil surge problems!

The pump is from Peterson and it’s a 3 stage unit

The sump has a V added to it and also two hoses back to the pump, also the Turbo drains go back to the new sump also.
 

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#22 ·
Engine next! I had to get a torque plate made for the engine to allow all the bores to be machined correctly.

Got the engine sleeved also so that way it car run normal motorsport type rings. Pistons are from JE and where custom made also with added clearance for the turbos and Methanol

Head studs are from ARP

Compression ratio (Very High)
 

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#23 ·
Heads are from Ric Wood Racing as he has done a wicked job thy are CNC ported and thy have loads of work added around the exhaust valves to improve low valve lift flow.

Over size valves, titanium retainers heavy duty chain

I have also changed the pipe work for the water to exit from the back of the engine also
 

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#24 ·
Dressing the engine takes the longest! as there are so many parts to be made..
 

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