What did Porsche do to the RS2?

[Boghopper]

This may well have been posted before, but I have done several searches and can't find anything.

Which engine (code) did Audi give to Porsche to made into the ADU unit fitted to the RS2?

Does anyone have a definite list of the parts that are different to boost the power to 315bhp?

Pete

[Dan]

I believe the starting point would be ABY.

AFAIK:

ECU Map
Airbox
Inlet/Exhaust Manifold
Exhaust Cam
Intercooler
MAP Sensor
Injectors
Fuel Pump
Rods
Flux Capacitor

That's taken off my own upgrade list though, so I might have accidentally included a couple of things that shouldn't be there - and I've probably missed something, too.

I'll let someone come and correct me

[RolloS2]

turbo,
intercooler,
exhaust manifold/downpipe,
injectors,
fuel pump,
ecu,
airbox,
cams.
thats what I know of, there may be some other things I have missed that someone will pick up on.

[Rusty]

Rods are the same as the ABY

The cam wheel is 10deg retarded over the stock S2 item
Water pump has a smaller pulley
Cambelt is slightly different as a result
hubs, brakes, handbrake, wheels
dampers
springs are stock ABY AC springs
ARBs
Later gearbox with wide first and flexible shaft.
Interior
Speedometer
Bumpers
Rear boot panel

There will be a definitive list somewhere for sure.

[psiconauta911]

Door mirrors and grill!

[UrS4boy]

Rods are the same as the ABY

...which are the same as the AAN rods. However, ADU (RS2) rods have different bearings than the ABY or AAN.

Intake cam is same as AAN and ABY but exhaust cam is different.

MAF is different if that got missed from the other lists.

[Rusty]

Why are the shells the same part number on the family album then?

034 105 701 & 701 B

[baltiboyS2]

...which are the same as the AAN rods. However, ADU (RS2) rods have different bearings than the ABY or AAN.

Intake cam is same as AAN and ABY but exhaust cam is different.

MAF is different if that got missed from the other lists.

The shells are all the same

cheers Raj

[prj]

MAF is different if that got missed from the other lists.

Only the grid is different. On the RS2 it is less restrictive.
Electrically they are completely identical and produce exactly the same AFR...

[s2_bo]

I thought RS2 big end shells where different and harder ?

[S6Sputnik]

I believe the starting point would be ABY.

AFAIK:

Flux Capacitor



I'll let someone come and correct me

I have been looking for that part do you have the correct part number ?

I know it must be 034 something but the last numbers are imposible to track down and I dont have the family album.

[prj]

I have been looking for that part do you have the correct part number ?

I know it must be 034 something but the last numbers are imposible to track down and I dont have the family album.

Too much "Back to the Future" ?

[madpugger]

AFAIK the inlet cam is also different.

Also, Later ABYs had the same shells, but i think as a result of the ADU development, therefore ETKA not lists them all as the same shells (the uprated RS2 developed ones)

Later ABYs also share the gearbox of the ADU, with a longer and stronger 1st gear, again as a result of RS2 development, makes sense for Audi to just make one box, as there is no cost advantage in having a lesser box in the ABY...

IM is the same as ABY but with a badge on it.

There are probably a shedload of smaller differences, but basically the drivetrain ones are covered already.

[Boghopper]

Thanks for all the info folks.

So from what everyone has said, the only internal engine mods are the cams, is this correct?

If the pistons, head and valves are the same and the power has gone from 230 > 315 bhp, is it fair to say the ports / valve sizes are at their limit?

I have read the head gasket is also RS2 specific, is this just better design or a different thickness?

As a sideline, what boost have you to be running to need ringed head / block? :mischeif:

Pete

[madpugger]

ABY (most but not all) have the same head gasket as the ADU. (Metal)

Depends on the age of ABY but internally they should be the same except cams, cam wheel, water pump. Earlier ABYs may have softer shells/paper head gasket.

Exhaust manifold is different, and turbo which gives the extra power, intercooler is larger. However the head is not at its limit, I will be, and Bram was running 500+ HP with standard head (ADU EX cam and adjusted timing). Obviously H beam rods fitted for safety.

Hope that helps some.