So I bought a non running stage 3 1.8t. How fast should it be? Seems slow.

[4A Play]

Long story short, paid <$1,000 for this car. 2001.5 qtm. Compression 110 across the board.

I'll update this when I'm on my pic with more details. It's too much to text on my cell.

With a .50 trim Garrett, 680 seimens injectors, FMIC, unitronic stage 3 mafless tune, 38mm tial, ngk .028s, and straight 3" exhaust how fast should this be? It's only pushing about 15 pounds currently due to the PO deleting the n75, I still need to figure out exactly what he did.

It just doesn't seem fast at all. She idles fine, not throwing any other codes, only for open circuit n75, needed small work to get running.

Is it the n75 code making it feel like a turd? She's idling fine though. Does anyone have pics of the n75 stock location, harness, and wire colors? I'll throw a resistor in line and see if if helps.

Awd making it seem slow?

Thanks a ton!

[redline380]

If it is boosting 15 psi, you should feel a nice little kick. I would first log and see what kind of timing it is running

[zandrew]

Looks like your car voted Trump so at least it's trust worthy.

You .50 trim garrett. Need more info on the turbo, stage 3 is a garrett gt2560r. Take pictures and post them of the turbo.

[4A Play]

I'll go take some detailed pics shortly. Thanks for the prompt replies guys. I come from hot rods and audi 4.2s. This boosted 4 banger game is new to me. I've been reading a ton and going through the car slowly. I just feel like there is something missing.

There is a nice kick at 4K and it'll hold through redline. But no faster than my brothers v6 g37x.

[redline380]

There is a nice kick at 4K and it'll hold through redline. But no faster than my brothers v6 g37x.

Nothing wrong with it then. If it leaves you wanting more, youll need to upgrade

[4A Play]

[4A Play]

Nothing wrong with it then. If it leaves you wanting more, youll need to upgrade

Damn. I can't imagine how a stock 1.8 feels lol. Thanks! I'm guessing 15lbs is safest on stock internals then?

[b6Hate4]

The 50 trim is similar to a 2871r in terms of power right? With a slightly slower spool?

I believe it is, in which case you could dial that up to 18 psi and still be pretty safe. I ran 25 on stock internals with a 71r elim. I'm guessing the car seems slow due to low torque numbers.

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Damn. I can't imagine how a stock 1.8 feels lol. Thanks! I'm guessing 15lbs is safest on stock internals then?

A stock 1.8 feels pretty lazy for sure!

[4A Play]

Damn. In that case, let me explain my n75 issue.

The PO was using way oversized vaccum tubing for the mbc. I put the appropriate size tube on it and it was then boosted up to 30psi once. I immediately shut her down and pulled the vaccum line so I could not boost on the way home from the auto parts store. I cranked the mbc all the way down, boosted to 10psi, and checked for codes. It's throwing the open circuit n75 code now and won't boost over 14-15psi now.

I'm guessing the oversized vaccum line was causing a small leak, repairing it caused the overcompensated mbc to boost spike. Now that I have corrected it I have this n75 code that was not there prior and can't find the damn thing to check it. No idea where PO put it but it's not in circuit with the wastegate/ turbo/ or mbc.

[redline380]

My stock avant and my 2871 sedan are night and day difference. But my sedan is at around 23 psi, not 15. That extra 8 is huge. A good in between is my stock b5 s4, which is nearly as quick as my 2871 sedan, but lacks in the upper rpm's.

As far as running that 50 trim over 15 psi on a stock engine, I wouldn't Would hate to break something. And 25 psi on a 2871r elim is DEFINITELY pushing it.

You could keep cranking up the 50 trim until the block blows up. They're cheap, who cares? Not to mention those old tech turbos spool really gradually so no torque spike. You could probably get away with quite a bit until a rod goes. And like I said, motors are cheap. Maybe build one on the side?

[4A Play]

I've been keeping my eyes peeled on local Vw forums but the awm is hard to find. I'd like to just turn it up to 18-20 and lock it there forever. No real need to blow a rod out the pan. This Mia n75 is preventing me from boosting over 15psi though. Can't find it or the connection.

[redline380]

You can use a ton of different engines in that car, including nearly any transfer VW engine too

[4A Play]

The inter web made it sound like the only plug and play engine would be a awm?

[redline380]

Hell no. Any 06a block and head will work. Oil pan and valve cover probably need to be swapped if from a transverse VW though

[redline380]

But keep in mind none of the transverse accessories will work

[4A Play]

What! Lol any 06a is a direct plug and play provided I swap the accessories?

[4A Play]

Any idea what colors the n75 wires are? I can't find it anywhere. Looking right now.

[redline380]

Well,any 06a 1.8t yes. And the correct oil pan is needed. But there's nothing saying you can't run a 2001 beetle engine in your Audi. However, manual/auto trans cranks do have their differences, and those differences vary between longitudinal an transverse trans

[A1 A2 German]

If you find the N75 wires, you'll need to plug in a N75 valve (electrically). You do not need to install it otherwise. I'll be shortening my N75 harness by ~3-4' and installing it in the rain tray (so doesn't bob around the turbo).

[b6Hate4]

Just gonna say under $1,000 for that is a steal btw. The S4 bumper costs more than 50% of that.

[Avant Nate]

I've always wondered if Limp mode did anything more than lower the boost. Maybe it's different on an awm, but maybe it retards ignition as well. With your compression being so low, boosting 15psi is probably like 7-8 on normal compression. At least that's what I tell myself. I ran 25psi on gtrs with 135 compression at altitude with 91 octane.

[4A Play]

Yea. I figured it was time for a head gasket this winter with some apr head studs. The diys don't make it look too impossible. Still hunting for this n75.

[ActiveMonkey]

Head gaskets are pretty easy to do, so congrats on the good find. I would recommend replacing all the gaskets from the HG all the way up and changing out for all new belts while you're at it.

[4A Play]

Calling my buddies looking for a motor to build up. I did get this for a steal. Got it from a friend of a friend who was threatened with a divorce if he didn't buy a family car lol. He also gave me a autopower roll bar all for $1025 with tax and title.

Found this socket jumped in the drivers side wheel well. Could this be it?

[Believer]

N75 harness is on the pass side of the engine bay and trunks into the MAF, SAI and N80 valve harnesses. That appears like it may be for the washer fluid reservoir level sensor? Hard to tell from the picture though.

[ActiveMonkey]

hopefully this will help.


Stock N75 location.




Color of wires.

[4A Play]

That helps greatly! But I have no reminents of the wires up there. Guess I need a ecu pin put. Damnit

[mysman]

Take your CAPS data:

http://www.modifieda4.com/web/caps/b518-new.html

[zandrew]

50 trim means nothing, a t3 50 trim vs t3t4 50 trim is a massive difference. Someone tells you it is a 50 trim you need to know exactly what. There should be a tag on the turbo center section, post that info and we can help you out.

[andyrew]

Do a video of a 3rd or 2nd gear pull and post it up. But based on what your saying it sounds like your making 15psi worth of HP. Thats about 250ish-275 HP on that turbo. Which should be about as quick as a 325hp heavy auto sedan

If your bottom end doesnt have rods then dont go over 20psi.

Remember this car stock had 150hp..

[Scottydo]

I had this exact setup minus the turbo was a t3/t4 and it should pull like a freight train. Having a n75 missing messes everything up even though you can control your boost manually it will retard timing and fueling.

[Scottydo]

Also a note on the compression, i had compression soo bad i had to push start the car to get it to turn on. I had 0 compression in one of the cylinders and the car still pulled like a freight train missfiring and all. Of course the rings were gone after i got home lol.

[bigblue]

Stage 3 on a 1.8t isnt too impressive since ive jumped ship into the fsi game. But with the awd you are gonna lose some of it.

Sent from my SM-N920P using Tapatalk

[b6Hate4]

Stage 3 on a 1.8t isnt too impressive since ive jumped ship into the fsi game. But with the awd you are gonna lose some of it.

Sent from my SM-N920P using Tapatalk

I hear that. Went from my B6 to a B8 TFSI and I'm 90% sure my B8 at stage 2 would drag a B6s ass even with an elim setup.

[redline380]

I had this exact setup minus the turbo was a t3/t4 and it should pull like a freight train. Having a n75 missing messes everything up even though you can control your boost manually it will retard timing and fueling.

Not really true. My N75 is plugged in but looped and I go completely off manuals boost control. It does nothing to my timing and fueling, at least on Maestro. It depends more on the tuning.

I hear that. Went from my B6 to a B8 TFSI and I'm 90% sure my B8 at stage 2 would drag a B6s ass even with an elim setup.

My wife's B8 with APR is no slouch either, but my 2871 car is quicker, as is my B5 S4.

[freekonwheelz1]

Looks like your car voted Trump so at least it's trust worthy.

You .50 trim garrett. Need more info on the turbo, stage 3 is a garrett gt2560r. Take pictures and post them of the turbo.

yea, post some engine bay pictures. if he cut the n75 harness then youll have some fun finding that because it runs in the same loom as the maf, sai, and a few other things. hopefully he just tucked the wiring back. it goes on the turbo inlet pipe and the hoses coming off the turbo housing and wastegate (near the engine block and air box on a factory car) is whenre the n75 hoses are and the valve itself has a nipple stuck into the turbo inlet pipe.

[buddy4024]

the n75 will literally make or break a build, my buddy has a franken turbo pushing almost 30 lbs of boost but his n75 broke and now his car wont produce more than 14 lbs of boost and his car is in limp mode due to this.

[b6Hate4]

Not really true. My N75 is plugged in but looped and I go completely off manuals boost control. It does nothing to my timing and fueling, at least on Maestro. It depends more on the tuning.



My wife's B8 with APR is no slouch either, but my 2871 car is quicker, as is my B5 S4.

I don't doubt that at all. I bet its mostly the b8's torque that makes it feel faster. I cant wait to drive my B5 too, hopefully with a 5 speed trans it will really pull around town.