New turbo for my 1.8t TT!

[908AudiTT]

I know the 1.8t has the k03 or the k04, but the k04 is barely any bigger and delivers almost the same PSI. The bigger question is: what other more powerful turbochargers are compatible with the 1.8t without any other mods? Which are the cheapest?

Can anyone show me websites where I can get a new bigger more powerful turbo?

Also, what's the most PSI the stock 1.8t engine can handle?

Thanks!

[darrenbyrnes]

I know the 1.8t has the k03 or the k04, but the k04 is barely any bigger and delivers almost the same PSI. The bigger question is: what other more powerful turbochargers are compatible with the 1.8t without any other mods? Which are the cheapest?

Can anyone show me websites where I can get a new bigger more powerful turbo?

Also, what's the most PSI the stock 1.8t engine can handle?

Thanks!

What do you have? 180 or 225?

The stock engine can handle torque up to 300. Over that and you're just asking for a Clinton, er, bent rod.

[908AudiTT]

What do you have? 180 or 225?

The stock engine can handle torque up to 300. Over that and you're just asking for a Clinton, er, bent rod.

I have the 180, but do you know how much boost it can handle?

[DougLoBue]

I have the 180, but do you know how much boost it can handle?

A GT30 at 10psi might make 300tq while a k03 can boost 30psi and probably not touch 300tq. Your limiting factor is torque, not boost and boost makes torque.

Frankenturbo or the Gonzo upgrade turbo package are the only two upgrades that use stock manifold/exhaust that I know of. ATP makes an eliminator kit that just doesn't seem worth it. PM either of those vendors and they can help you out.

[20v master]

I have the 180, but do you know how much boost it can handle?

As much as you can afford, which doesn't sound like much at this point.

[Richard@VerdictMotorsports]

Its not specifically about boost, as it is flow. The two go hand in hand but you have to remember boost is a measure of resistance.

As stated before the stock 1.8T rods are good up to 300 wheel torque.

The K04 isnt a bad choice, it will make more HP/TQ than a K03 but is limited just the same. A step up from the K04 would be the Frankenturbo F4.

Here is a link to the Frankenturbo F4...Franken F4

If your looking for something a little more aggressive, theres always the F23...Franken F23

If your looking for something even bigger, theres always the 28RS, which is really the biggest turbo you can get away with on stock rods. After rods are upgraded, you could look at the 2871, 30R, 3071, 3076 and so forth.

A ton of options, just really depends on how much power you want and how many supporting mods you want to throw at the car.

[DJmart]

Subscribed!

130k on original turbo 18psi! -- Death imminent!

[Mantvis]

Its not specifically about boost, as it is flow. The two go hand in hand but you have to remember boost is a measure of resistance.

As stated before the stock 1.8T rods are good up to 300 wheel torque.

The K04 isnt a bad choice, it will make more HP/TQ than a K03 but is limited just the same. A step up from the K04 would be the Frankenturbo F4.

Here is a link to the Frankenturbo F4...Franken F4

If your looking for something a little more aggressive, theres always the F23...Franken F23

If your looking for something even bigger, theres always the 28RS, which is really the biggest turbo you can get away with on stock rods. After rods are upgraded, you could look at the 2871, 30R, 3071, 3076 and so forth.

A ton of options, just really depends on how much power you want and how many supporting mods you want to throw at the car.

So what turbo APR Stage 3+ is using? 28RS or 2871RS?
Ive always thought that i had 2871RS but now you made me wonder if i have 28RS

[20v master]

So what turbo APR Stage 3+ is using? 28RS or 2871RS?
Ive always thought that i had 2871RS but now you made me wonder if i have 28RS

The 3+ kit, which is the only kit for the 225, is a 2871. Did you get the red car running?

[darrenbyrnes]

Subscribed!

130k on original turbo 18psi! -- Death imminent!

Geez, I hope not. I'm north of 160k and have been chipped for over 80k.

[Mantvis]

The 3+ kit, which is the only kit for the 225, is a 2871. Did you get the red car running?

Hmm i hought it was RS

Still not runing, sooo much pain!

[DeckManDubs]

I know the 1.8t has the k03 or the k04, but the k04 is barely any bigger and delivers almost the same PSI. The bigger question is: what other more powerful turbochargers are compatible with the 1.8t without any other mods? Which are the cheapest?

Can anyone show me websites where I can get a new bigger more powerful turbo?

Also, what's the most PSI the stock 1.8t engine can handle?

Thanks!

K04-01 is ~ 70hp and 80-100tq gain over a K03s with supporting upgrades (IC/turbo-back exhaust)

K04-2x ~ 20-40hp more and 30-50tq more than the -01

A GT30 at 10psi might make 300tq while a k03 can boost 30psi and probably not touch 300tq. Your limiting factor is torque, not boost and boost makes torque.

Frankenturbo or the Gonzo upgrade turbo package are the only two upgrades that use stock manifold/exhaust that I know of. ATP makes an eliminator kit that just doesn't seem worth it. PM either of those vendors and they can help you out.

Right on Doug.

PSI is a measurement of restriction. Increase the charge pipe or intercooler volume and you will have pressure drop, but that does not mean that it makes less power. Volumetric efficiency and flow dynamics come into play for power. My supercharged VR6 did 12psi with 800 CFM of flow, the new charger is 1200 CFM. A GT35 is only 700CFM. This is where cams/port work/ charge piping/intercooler efficiency increase velocity of the air entering into the bores.

The 3+ kit, which is the only kit for the 225, is a 2871. Did you get the red car running?

From what I remember I thought that the APR kit had a modified impeller to prevent pushing it beyond the limit of the rods ie clipped fins. Been a long time since I heard that, think it was Tony @ EPL that mentioned that.


As for a side note, a K04-01 will do 270wtq on GIAC+ on FWD. So as max and a few others on here have mentioned, the K04-2x still have plenty of potential. Bent rods and melted pistons are only mild annoyances.



And having done a 225 K04-2x on a MK4, it is cheaper to go with the FT or PPT 2871 kit over that route. Requires lots of fab/welding/modifying in order to get it to work.

[20v master]

From what I remember I thought that the APR kit had a modified impeller to prevent pushing it beyond the limit of the rods ie clipped fins. Been a long time since I heard that, think it was Tony @ EPL that mentioned that.


As for a side note, a K04-01 will do 270wtq on GIAC+ on FWD. So as max and a few others on here have mentioned, the K04-2x still have plenty of potential. Bent rods and melted pistons are only mild annoyances.

On the first part, I'm sure APR would like you to believe they modify turbos. However, it's an off the shelf 2871R.

Secondly, I made 276wtq on GIAC on FWD on a K03S with basic 3" turbo back, CAI, and FMIC, and that was on pump gas, no w/m injection, stock intake mani, no cranked WG, etc etc. Well over 300wtq should be possible with a K04-001.