RichLV's UrS4

[RichLV]

Finally I got my harness. And 5 new coils. Happy as f**k. Car stutter is gone, idle has improved as well.



Harness is very well made, reeks of quality. Spoils are in original packaging. Gotta love germans.

Since my coil wiring was a complete mess, it took a lot of time and almost all of my old coils. Had to pinpoint each individual coil signal live, that killed most of my old coils. After double checking everything works fine, soldered and isolated the signal wires. Now the wiring is like it was originally.


Looks a lot better as well.
Bosch F5DP0R's on the way.

[RichLV]

I could use some advice from you gurus. So I had this stuttering problem on my URS when I put the foot down, right when it gets full load the car starts to stutter. I'm thinking that it's ignition related. As far as I know the spark plugs have not been changed in a long time and one time the 5th cylinder did not work. Considering the quality of coil wiring done that might be contributing as well. It actually shoots through the exhaust when it stutters.

I got these faults when hooking it up to PC:
00561 - Mixture Adaptation
14-00 - Adaptation Limit (Add) Exceeded
00561 - Mixture Adaptation
13-00 - Adaptation Limit (Mul) Not Reached

Additive trim fault is probably because my idle is erratic when the car starts to warm up a little the revs float 800-900. It goes away when car is at 90 degrees C. Probably a vacuum leak, and I think that I know where.

Would appreciate thoughts on this.

And on a bit more positive note I've finally swapped over old rubber hoses for new silicone.


And I've even bought special turbo hose clamps.

[RichLV]

Was thinking about the injectors the other day. I've already mentioned that I have 5 Bosch 0280156023 injectors. Was looking for more info about them, and found out that they are 373cc @ 3 bar (43,5 psi) fuel pressure. Then looked for a formula to find out what kind of flow would they have at 4 bar (58 psi), since we have 4 bar regulators. So the formula is:

new pressure/old pressure * increase/100

I got 1.333.....3, so it's a 33% increase in flow. 373*1.33=496cc. Amirite? If so, then that's more than enough for my power target.

[RichLV]

Got the car back from the shop. The sills are reinforced and welded. The new exhaust sounds ballistic! It's gotten even louder! But I love IT! After driving my old 80 (which runs very nice, because head is ported and lightened) for a few days, it's such a joy to drive this thing again.

Got a problem though. I'm desperate to change oil in the rear diff, but I am unable to get the flush corks to move. We've tried hammering them, used pneumo instruments, lubricated them, heated them and still nothing. Exhibit too much force when unscrewing them and diff casing will be broken. I don't want to remove the diff to change the oil...

[RichLV]

If boost then it's very good. Aight, I'll grab ebay hoses.

[hunker7]

25 psi boost? Or overall pressure?

25psi ~ 1.72 bar , which i'd say is boost.

[RichLV]

25 psi boost? Or overall pressure?

[Morris400]

I'm using eBay hoses on mine. Good for my 23-25 psi on k24-7000.

[hunker7]

Chinese as well?

I'd say most ebay hoses are Chinese

[RichLV]

Besides that, new fuel lines, Bosch parking brake cables and brake lines were installed.

[hunker7]

My boost hoses have cracked recently and I'm looking for silicone replacements. Are ebay chinese any good? Like these for example - http://www.ebay.com/itm/Silicone-tur...item3f28f81312

If not then I'll order 2 lower hoses from Sweden. Sweden sounds like more quality if chinese aren't worth the money.
http://www.ebay.com/itm/Audi-S4-S6-C...f5f55a&vxp=mtr
http://www.ebay.com/itm/Audi-S4-S6-C...a48abe&vxp=mtr

Need advice on this ASAP.

I've heard that ebay hoses are good, John (newsh) on here said he used ebay hoses for his IC and he runs RS2 setup 2.0bar and it's all good.

[RichLV]

My boost hoses have cracked recently and I'm looking for silicone replacements. Are ebay chinese any good? Like these for example - http://www.ebay.com/itm/Silicone-tur...item3f28f81312

If not then I'll order 2 lower hoses from Sweden. Sweden sounds like more quality if chinese aren't worth the money.
http://www.ebay.com/itm/Audi-S4-S6-C...f5f55a&vxp=mtr
http://www.ebay.com/itm/Audi-S4-S6-C...a48abe&vxp=mtr

Need advice on this ASAP.

[RichLV]

Some updates from the car.
Massive exhaust renovation, will be remade from scratch starting from downpipe.
New fuel lines will be installed, old ones have corroded badly.
Some sill welding will take place.
Got new front shocks!

And finally oil is gonna be changed in gearbox and diff.


GOT IT!! Was surprised how cheap it was - 35 eur.

[RichLV]

Thank you prj, always good advices! RS2 turbo with these injectors would solve some inconvenience issues. With RS2 turbo I don't need custom oil and water lines, and K24-7200 is more accessible. So the baseline right now is:
1. RS2 exhaust manifold (new)
2. RS2 K24-7200 turbo
3. Bosch brown 373cc injectors
4. I suppose a 3 bar MAP will be necessary
5. Maybe I'll throw in 7A exhaust cam if it will be available
6. A remap, ofc.

Sounds good for 350HP?

[prj]

The 373cc will be sufficient (barely) for the RS2 turbo, no need to buy other injectors if you already have these.