2.0 K04 ?'s

[Toast]

What happens if i bore out my engine to 2.0 and keep k04 instead of switching to bigger turbo?

Would it take the engine longer to build power?
Would turbo still have same rpm range?
Would i get ~300 hp?
About how much would it cost?

[Tgr_Clw]

No. It'll take the engine less time to build power i.e. less lag.
No. The power curve will move to the left i.e. more power down low, but it'll run out of breath sooner
Perhaps.
Depends.

At least that's how I see it.

[[email protected]]

Would it take the engine longer to build power? No... the K04 would spool even faster due to the extra displacement

Would turbo still have same rpm range? It should be close

Would i get ~300 hp? At the crank? I think you would come up short

About how much would it cost? Depends on the parts you decide to use. Some people want to save, others prefer to use premium parts.

[dougyfresh]

Clint (audia4_20t) has a 2.0 and is running a K03 right now.



I didn't really notice much of a difference when I drove his car. Then again, I'm used to a BT car so I was sitting there 'waiting' for the power and it never came. haha.

[317ssayzarc]

Clint (audia4_20t) has a 2.0 and is running a K03 right now.

which is horrible lol... its very comical listening to him bitch about how much it sucks lol

[CO AVANT]

Using a K03 or K04 on a 2.0L is absolutely pointless.

[mike-2ptzero]

Believe me it is a HUGE waste of time, plus you would have to run the turbo at half the boost other wise the turbo will just taper off even quicker. I ran a K04 on my 2032cc built engine and I was able to produce nearly 10psi while just revving the engine while out of gear. The K04 on a 2 liter is not going to make any more power then it makes on a 1.8 liter, the power band just moves way left and you end up having to short shift the car well before 5k.

Even a T28/GT28r is small when running on a 2 liter, you wont be able to run more then 19psi and it will taper off quickly and hp peak will be at 5500. The GT2871 is the smallest turbo I would ever suggest running on a 2 liter.

[CO AVANT]

That's crazy Mike! Making boost while out of gear...monster motor for that turbo lol.

If I were at sea level I would even say a 2871R is a bit small for a 2.0L setup if you have an 8.5K built head. Good if you are 2.0L with stock reving head. I personally would run a 3071R. My boost tapers from 25psi at 5500rpms to 22psi at 7000rpms with my 2871R 2008cc setup up here (thin air isn't helping the matter). Good thing I built my setup to run at high elevation and not sea level all the time lol. If I really wanted to make use of my full rpm band I would have gone with a 3071R or bigger, but I do not want to rev my engine to 8K anymore after the last failure happened at 8+K rpms.

[Toast]

Thanks for the replies. I was looking for a way to get a little more use from my K04 but it looks like the cheapest and easiest way to get more power is to swap it with a bigger turbo.

Would swapping my rods/pistons with ecs's $1,000 package be worth it or should I just follow the herd and swap turbos?

[mike-2ptzero]

Only thing that is going to give you more peak hp is going with a larger turbo, doing rods/pistons isn't going to increase power and wont give you 2 liters unless you throw in a 2 liter crank.

[CO AVANT]

Like I'm sure you already know Toast. GTRS is the best bang for the buck in regards to hp gain. I had a K04 for over 2 years then went gtrs. Never did I look back and I'm the type that likes the low end power over top end.

[Toast]

Like I'm sure you already know Toast. GTRS is the best bang for the buck in regards to hp gain. I had a K04 for over 2 years then went gtrs. Never did I look back and I'm the type that likes the low end power over top end.

Exactly - I don't want to give up the low end power since most of my driving is LA traffic but I've gotten bored with my set up and GTRS is looking like the best solution.

Thanks again.

[CO AVANT]

I would rather have a BT in traffic any day over my old K04 setup. Just too much torque snap down in 1st gear. GTRS was so much more smooth and could do stop n go traffic much more easily.

[dougyfresh]

I would rather have a BT in traffic any day over my old K04 setup. Just too much torque snap down in 1st gear. GTRS was so much more smooth and could do stop n go traffic much more easily.

Its the way the car should have been from the factory. I can't believe I've waited 3 years of driving a bone stock car before I went BT.

[Tgr_Clw]

I would rather have a BT in traffic any day over my old K04 setup. Just too much torque snap down in 1st gear. GTRS was so much more smooth and could do stop n go traffic much more easily.

Smoothness of the K04 is largely dependant on the software used imo.
I find my setup to be perfectly smooth and the power/boost level can easily be modulated (even in 1st).

K04 is nice, just not enough power.

[CO AVANT]

The revo software is very smooth. It's just the power delivery I'm talking about since the gtrs power comes on so much more linear over any k04 setup. I loved my K04 down at sea level. Had as much power on 91oct as I did up here on 112oct. It's a to each their own theory when it comes to the power delivery of the 2 setups. Prolly why Mike (Jet Jockey) still has a hybrid K04 on his car. Down low power is better for auto-x, high end better for the high speed tracks.

[Tgr_Clw]

The revo software is very smooth. It's just the power delivery I'm talking about since the gtrs power comes on so much more linear over any k04 setup. I loved my K04 down at sea level. Had as much power on 91oct as I did up here on 112oct. It's a to each their own theory when it comes to the power delivery of the 2 setups. Prolly why Mike (Jet Jockey) still has a hybrid K04 on his car. Down low power is better for auto-x, high end better for the high speed tracks.

Agree. There still is that tq spike that gets annoying after a while.

[Toast]

Jet jockeys set up barely counts as a K04. The turbo is limited plus he's done so many mods and weight reduction on his car that makes our cars sound stock.

[Mark]

using a K04 on a larger displacement engine doesn't add up. the purpose of a smaller turbo like the k04 is to spool quickly with a smaller displacement engine. 2.0l isn't a huge gain in volume over 1.8l (11%) but it makes a difference. sell your existing K04 and software to a forum member, use that money towards a big turbo setup.

[AudiA4_20T]

Ok, from someone who has been running a 2.0 K03 for like 6 months

1. The power comes on fast, is it faster? I dont know I dont think the K03 can really spool any faster to be honest

2. Most would think the powerband ends sooner but in actuality I felt like it held harder to redline, when I would rip it to 7k I never really noticed any huge drop like the original K03 did

So, is it worth it? of course not, which is why im eventually doing it really big

[mike-2ptzero]

Ok, from someone who has been running a 2.0 K03 for like 6 months

1. The power comes on fast, is it faster? I dont know I dont think the K03 can really spool any faster to be honest

2. Most would think the powerband ends sooner but in actuality I felt like it held harder to redline, when I would rip it to 7k I never really noticed any huge drop like the original K03 did

So, is it worth it? of course not, which is why im eventually doing it really big

What tune are you running with the K03 on the 2 liter?

[AudiA4_20T]

what Tune Are You Running With The K03 On The 2 Liter?

Giac 1+