Bobby Singh's Audi S2 avant project

[bobby singh]

Bouncing doors - so for sometime my rear doors seem to bounce when you close them. Managed to get a used lock that's at least fixed one side:

I also bought a B4 sunroof as parts are getting harder to find - I also used this to learn how to take it apart and then finally changed my drip tray and drip tray arms:

Drip tray replacement:

Roof bars

The paint shop and I was both confused on how the roof bars come off and after some invesigation and lots of wd40 they are finally off.
Im hoping to get the edge roof painted now

Cheers
Bobby

 

[bobby singh]

Turbo turned up

Rods

Pistons

Work on the spare ECU has started

Sockets installed

Ported changes from my current tune into prjmod (timing, injector cal and boost control)

Waiting on 4 bar boost sensor but car runs

Cheers

 

[desertstorm]

Great work Bobby, This looks like a pretty serious build . That turbo looks meaty, looks like an 8374 or similar, What's the HP target ?

 

[bobby singh]

Hey Karl - correct 8374 T3, to be honest I don't have a target for power - it makes whatever it makes. I will make the bottom end a 2.5l to help spool, but off course if its too laggy I could downsize after.
I want that 5 pot sound from the group b days haha

 

[B5NUT]

Can I ask where & what type of bulbs are used in the diff lock button, at least one of my bulbs have failed so may as well replace the lot

 

[bobby singh]

Can I ask where & what type of bulbs are used in the diff lock button, at least one of my bulbs have failed so may as well replace the lot
View attachment 251678

I tried looking through my ebay history and could not find the listing, however Im sure I used a thread on the S2 forum - maybe this is of some help:

Inside the rear diff lock switch - S2Forum - The Audi S2 Community

Clutch, gearbox, differentials, driveshafts, rear diff mount and experiences

www.s2forum.com

Cheers

 

[B5NUT]

Had a look at that thread but did not have much luck finding them. I'll keep searching.

 

[bobby singh]

Had a look at that thread but did not have much luck finding them. I'll keep searching.

Here try this thread has a lot of info https://www.s2forum.com/forum/membe...audi-coupe-oem-interior-lighting-guide/page10

 

[bobby singh]

Tracking

These guys managed to get the tracking pretty much perfect, only one side was a pain but we got there in the end

On a side note managed to find a old picture of me in a Audi S2 from the NEC motorshow during the early 90's

Cheers
Bobby

 

[desertstorm]

Hey Karl - correct 8374 T3, to be honest I don't have a target for power - it makes whatever it makes. I will make the bottom end a 2.5l to help spool, but off course if its too laggy I could downsize after.
I want that 5 pot sound from the group b days haha

With a 2.5L bottom end that will make it a lot better off boost and of course it will spool better than the stock 2.2L .
Those are 750bhp capable turbos so I would of thought you would be looking at around 700bhp plus crank hp with 2.2-2.3 bar boost. And those EFR turbos will deliver higher P2C ratios than the Garrett turbos so you can run more than that easily if the engine / transmission will take it.

 

[bobby singh]

With a 2.5L bottom end that will make it a lot better off boost and of course it will spool better than the stock 2.2L .
Those are 750bhp capable turbos so I would of thought you would be looking at around 700bhp plus crank hp with 2.2-2.3 bar boost. And those EFR turbos will deliver higher P2C ratios than the Garrett turbos so you can run more than that easily if the engine / transmission will take it.

Indeed its very efficient https://www.borgwarner.com/go/TZ8V21

 

[bobby singh]

Reverse Inlet manifold

Made by BST Germany - being reversed means shorter run and allows for brake servo if I decide to go down that route later.
Running this inlet will mean different Wagner intercooler.

 

[bobby singh]

So the car had the roof redone:

Good news is the roof is much better now and with the roof bars out the way it made it much easier.
However, the roof trim still got in the way and it started falling apart when trying to lift it.
I've managed source one from a car being broken so this will need a revisit in the future.

In terms of tuning - I've managed to get wideband lambda going into the ECU

I'm using the following formula:
(((X*0.007212) + 0.3125)) for the TunerPro cal

My lambda controller is set as follows:
0.5 lam @ 0.5v
2.0 lam @ 4.5v


Cheers
Bobby

 

[bobby singh]

Old battery was draining within a few days and bought a slight larger model and it fits perfectly:

 

[B5NUT]

So have you found another MAF fits and will work with the stock ECU and a slight remap?

 

[bobby singh]

So have you found another MAF fits and will work with the stock ECU and a slight remap?

No I'm working on getting rid of the MAF and use speed density hence why wanted to get lambda logging into the ECU.
You have a broken MAF? I could flash some chips with a stage 1 tune with SD if you want?

 

[B5NUT]

No it's still working. However they are rare and expensive now. So was just looking around for future options. I'm good for tuning. Someone gave me "homefries" remap chips, however I'm planning on keeping the car stock. However if you have a chips that could bypass the MAF so I could keep the car working until a replacement could be found then I would be interested. Think I'm paranoid about most of the obsolete parts on this car!

 

[bobby singh]

No it's still working. However they are rare and expensive now. So was just looking around for future options. I'm good for tuning. Someone gave me "homefries" remap chips, however I'm planning on keeping the car stock. However if you have a chips that could bypass the MAF so I could keep the car working until a replacement could be found then I would be interested. Think I'm paranoid about most of the obsolete parts on this car!

M232 Wiki

m232.org

This has the links for a stage 1 tune with Mafless tuning

 

[LarsE]

So have you found another MAF fits and will work with the stock ECU and a slight remap?

The only real MAF solution i know of is prj:s own MAF swap for a B5 RS4 one. I run this on my B2 90, but it need hardware mods as the speed density do. The maf connector needs swapping for the appropriate one, and som jumpers made into the ECU. So you are basically stuck with your MAF as long as you don't go for the speed density mod.

 

[bobby singh]

S2 & Cossie day

Cossie and S2 looked so good together had to take a few snaps

 

[bobby singh]

Engine work

So with the help of a S2 Forum member I got my hands on a AAN block (same as a ABY but for a URs6) - It came from a car with a broken timing belt and the head had already been sold off - 100k on the clock before this happened.
Block had been sitting for 7 odd years like this:

Done the deal and got it home for a strip down:

Don't think the water pump is usable

3litres of oil came which was a good sign:

Crank and pistons out - note the main bearings are like new with "95" stamped on all parts so its never been apart I would say

Gave the engine a nice pressure wash and its looking a lot better already:

With block cleaned - I wanted to get on with the grinding to clear the new rods.
In went the Diesel cranks with old pistons and new rods

20vt cranks Vs Diesel (top)

More to come....

 

[B5NUT]

What will you be doing with the ABY engine in the car?

 

[bobby singh]

What will you be doing with the ABY engine in the car?

Keeping it as spare - engines are becoming rare and expensive to find so better holding onto it

 

[bobby singh]

Starting issue
Had a issue with starting the car when fuel level went below half

Took the fuel pump and pushed some pressure through it and found a bad seal:

Engine block

left it in white vinegar for a few days and the results are very decent

 

[B5NUT]

Good find on the copper washer. I never tried but is the pump easy enough to remove?

What will you be doing with the bores on that bock, as the top section appear look a bit rusty in the photo's but it could just be the light.

I would be keeping the engine as well. Do you think you would revert it back to stock if you sold the S2?

 

[bobby singh]

Block work

Found some metal in the oil pick up so stripped the oil pump to check the condition and it looked mint:

Noticed the spring was already skimmed so should have plenty oil pressure

TPS still have the oil pick up rubber and oil pump spring so ordered those new

Torque plate - nice block of alu turned up

My cnc guy will machine this soon - I haven't seen many use a torque plate for these engine for boring which seems very strange considering its rare engine to find.

Block condition looks a lot better after a soak in vinegar

S2 sump also landed - time to order a WELD-IN SUMP BAFFLE KIT

 

[bobby singh]

Good find on the copper washer. I never tried but is the pump easy enough to remove?

What will you be doing with the bores on that bock, as the top section appear look a bit rusty in the photo's but it could just be the light.

I would be keeping the engine as well. Do you think you would revert it back to stock if you sold the S2?

Good question - I bought this car to put a smile on my face when I drive it.
I understand it will be worth more stock but my objective was to extract that 80's 5 pot sound from this.
The bore rust I'm not too worried about as I'll be boring it 0.5mm+ to make way for the new pistons

 

[bobby singh]

Forgot to answer your question about the pump - mine runs a 044 pump which sits inside the stock basket. However, I believe the pump should be sitting lower and you need to hack the plastic to make it sit lower.
But I failed at removing the basket so just pulled the pump up.

I've ordered this so the pump depth can be adjusted correctly - https://turbozentrum.co.uk/034Motor...Pump-Adapter-Kit-Bosch-60mm-Audi-S4-2000-2002

 

[bobby singh]

So had the Air Bag light on for a while now and the error code was:

65535 - Internal Control Module Memory Error
00-10 - - - Intermittent

Its related to some bad memory or checksum issue.

I got hold of a replacement item - 8A0959655 but ended up with more errors. In the end I installed 8A0959655B from someone breaking a s2 - no more light

Reverse lockout has always been broken on my car (could get reverse when going for first)
After some serious research I found the lever in Germany brand new (note the 5 speed ones are different)

Engine parts keep coming:

Oil pick rubber boot:

CNC guy now has the torque plate and we found the PD 8v head lines up pretty well to the 5 cylinder head gasket:

 

[bobby singh]

As I've had the pump out in the past I've noticed the pump could do with sitting abit further down in the basket. So rather than using cables etc to hold it in place I got the correct part for the job:

Also, shocking news but the oil pump spring is still available from Audi - So rather than risking a spring thats not seen much action for the last 7 years I ordered a replacement:

Block is looking well I must say - Just waiting on the torque plate before I can move onto the next step:

Cheers

 

[Bempa]

What a great resto/build! Really looking forward to se this

 

[desertstorm]

Looking good, I like the fact that the bolt spacing on the cylinder head looks to be the same as a 1.9PD. VAG really do seem to stick with proven concepts and designs. So much is swappable between platforms . It may be an optical illusion on the picture of that oil pump spring but the diameter of the wire on the new spring looks a little thicker?

 

[bobby singh]

Looking good, I like the fact that the bolt spacing on the cylinder head looks to be the same as a 1.9PD. VAG really do seem to stick with proven concepts and designs. So much is swappable between platforms . It may be an optical illusion on the picture of that oil pump spring but the diameter of the wire on the new spring looks a little thicker?

Hey Karl the old spring is actually on the left side - I cleaned it with wire wool as I thought I had seen some rust. But to remove all doubts I rather fit a new spring so I can sleep at night.
Plenty parts keep coming so hopefully get the block bored soonish

 

[bobby singh]

Sometimes its the simple things that make you happy
Been hunting after this metal ring for the rear light and finally found one in mint condition:

Better than my ghetto fix:

Front fluid filled dampener arrived

 

[B5NUT]

What is the price of the fluidampr, and is there much benefit over the standard pully?

 

[bobby singh]

What is the price of the fluidampr, and is there much benefit over the standard pully?

Hi - here is some information - https://www.vdamper.com/22T-20V-I5--3B-7A-ADU-ABY-034046-5PK-2V-Application_p_45.html
Unless you are balancing the bottom end then you can not install this.
Its expensive but I've seen please ask £500 for a used stock item which will be 25 years old plus

 

[bobby singh]

Progress has been a bit slow but managed to wire in the lambda controller with a Bosch LSU 4.9 sensor. This Controller also give output for narrowband control back into the ECU so no need for oem sensor anymore.

Used the old plug from the old sensor for power and narrow band back into the ECU - less wires and lambda controller now only comes on when car is running (just like the heater for the oem sensor)

All connection done via super seal 5pin plug

Straight into the glovebox:

RS232 connector available in glovebox for config

Cheers

 

[NHN]

Block work

Found some metal in the oil pick up so stripped the oil pump to check the condition and it looked mint:

Noticed the spring was already skimmed so should have plenty oil pressure

TPS still have the oil pick up rubber and oil pump spring so ordered those new

Torque plate - nice block of alu turned up

My cnc guy will machine this soon - I haven't seen many use a torque plate for these engine for boring which seems very strange considering its rare engine to find.

Block condition looks a lot better after a soak in vinegar

S2 sump also landed - time to order a WELD-IN SUMP BAFFLE KIT

What were the metal bits or didn't you dig that deep or you'd not sleep lol.

 

[bobby singh]

What were the metal bits or didn't you dig that deep or you'd not sleep lol.

The block came from a car with broken timing belt so I guess it some crap from that.

 

[bobby singh]

Added TFSI coils with a wiring loom from -

Kabelsatz zur Umrüstung auf TFSI Spulen Audi 5 Zylinder 20V Turbo

Kabelsatz zur Umrüstung auf TFSI Spulen Audi 5 Zylinder 20V Turbo

www.lspeed-racing.de

Coils I used - BERU ZSE032

I've managed to install the OEM coil cover back
Still need to adjust the dwell time in the tune but these work so much better than the 27 year old coils and wiring. There is now no more random flat spots, rev's nice and clean.

I would like to refresh the injector loom next especially near the cam cover area (heat source).

Quick video


Was messing around with a dragy and clearly shows how this turbo drop plenty of boost between gear changes