What power to expect?

[Error404]

The stock turbo simply will not flow enough volume of air to break 300 I don't think.
You might get close, 280-290hp is a good figure on a cool day with decent software, free flowing exhaust and an efficient intercooler and everything in top working order. Dyno figures of course will vary so it is impossible to have a definitive figure.

[Majorcina]

That's exactly the range in between your HP will be depending on weather, overall motor condition and head porting quality.

If you want to know it more accurate, find someone with complete stock S2 and and a chip tuning that is well known, e.g. MTM, ABT or someone else who has really established the HP numbers he gives, and go for a little hunt. Or compare to a complete stock RS2. Then you have reference points.

If u belive be,there is none of s2 and rs2 in my country...There is 1 rs2 which is wrecked

The stock turbo simply will not flow enough volume of air to break 300 I don't think.
You might get close, 280-290hp is a good figure on a cool day with decent software, free flowing exhaust and an efficient intercooler and everything in top working order. Dyno figures of course will vary so it is impossible to have a definitive figure.

Some people told me that i will lose power on stock car with chips with 3'' exhaust?I was planing to put 1 silencer and rear mufler.
So my question is that true or...?

[mac2226]

I don't think you will loose bhp

[AndyP]

I don't think you will loose bhp

So what did yours dyno at?

[Jamo]

The stock turbo simply will not flow enough volume of air to break 300 I don't think.
You might get close, 280-290hp is a good figure on a cool day with decent software, free flowing exhaust and an efficient intercooler and everything in top working order. Dyno figures of course will vary so it is impossible to have a definitive figure.

Yep dyno's vary widly, we've had Nip and Rusty do over 290 though on forum RR days infront of multiple witnesses on the original turbos

Interesting questoin which is better exhaust or intercooler upgrade they have differnet effects on the car. I suppose the exhaust will have the biggest noticeable effect on a turbo car but lower IAT's from a good intercooler setup makes for a more timing via the ecu. Tough call ( or do both )

[Jamo]

I understand the intercooler bit just not the rest about 3" turbo back.The K24 is that standard and when you say "to it's limit" is it still reliable at that limit? Thanks.

Limit is in terms of you are going outside of the turbo's compressor map and basically just generating hotter air rather than being more compressed ( hence why you are limited by the stock intercooler as you need larger to cool it more )

[Jamo]

At stock motor 290 hp is not really reliable any more I think.

There are too many unknown parameters to really say a precise HP number, so folks-let's start the hp-bingo :-)

I do not think that prj's chips rev out turbo to the max (or does he? Jamo, you know him better...)
I suppose only with the chips the motor would have ~260-270 hp, but with good porting and a good exhaust maybe overall up to 280-290, without giving to much stress for turbo, cause motor's efficiency should be better.

IC and exhaust could help both, but not very much- charger is limited.

What was your and your friend's opinion?

No idea on prj mapping, he can speak for himself in this regards originally it was said refining the homefries with s2central.net If the chip is based of that then it's quite good from personal experience.

If it's his own mapping which I suspect it is, I have no knowledge of it and wouldn't cast judgement or comment on it.

[Majorcina]

Yep dyno's vary widly, we've had Nip and Rusty do over 290 though on forum RR days infront of multiple witnesses on the original turbos

Interesting questoin which is better exhaust or intercooler upgrade they have differnet effects on the car. I suppose the exhaust will have the biggest noticeable effect on a turbo car but lower IAT's from a good intercooler setup makes for a more timing via the ecu. Tough call ( or do both )

Unfortunately now i can do only 1 of those two,since i need to register the car which will take me around 700e,so i belive the exhaust shud be done 1st?
Just to be 100% sure,i will not lose with 76mm exhaust from turbo to end with 1 silencer and rear muffler? This is making me worry since i dont wanna ruin the power of it since i cant go with biger turbo for now

[mac2226]

So what did yours dyno at?

Hi Andyp not had it dyno today he's been too busy doing customers cars but I will Once he's got a hour free as I would like to see what the car is doing

[Quattronaut]

That a too big exhaust can loose performance is often said about NA cars, because they kinda need exhaust backpressure for lower rpm torque. On turbo motors it's always the bigger-the better, AFAIK.

But, to be honest- I wouldn't change anything right now. If the budget is too low in the moment I would wait for the right moment.

If you e.g. build or buy a custom downpipe right now, and then, few months later want to upgrade to bigger turbo- downpipe probably won't fit any more.

Buying and installing all that stuff piece for piece over a time mostly does not work-especially, when the whole setup is not really ready and planned in your head. Believe me- I had enough unnecessary costs and stress with that kind of "system", and I believe I'm not alone in here

[Majorcina]

If i go for biger turbo,that will be only for rs2 turbo,so i sopose the downpipe would fit?
We dont have here road's where u can use the car to max or tracks

[Jamo]

Do the exhaust there are no downsides apart from noise

[Quattronaut]

Ok, no problem then, should fit

[Majorcina]

Do the exhaust there are no downsides apart from noise

I hope it wont be to loud,but i dont mind to much,people probably toth the same problem would be with 2big exhaust like on n/a engines...Thats why i asked to be 100% sure
Thanks for help mate

Ok, no problem then, should fit

Yeah i toth so We dont have dyno's over here so evrything above rs2 setup is imposible to make decent remap

[popdemonic]

Marko,
on NA cars,the size of the exhaust effects the performance especially low down end power.on Turbo cars,you should get the biggest as much as you can.it didn't require any backpressure since the turbine wheel pushed all the hell out naturally.I have 76mm(3")exhaust on my car once the car still had the automatik box which caused the space limits when fabricated the exhaust under the right CV half shaft.if i could do it again i will try to get 100mm(4") downpipe.as i told you if you want to upgrade the turbo get the one with your desired spool up while gaining the top end as your goal.you won't regret and
end up buying the turbo again.I have 2871 since i had the automatik box.it's the safety factor that i couldn't go any bigger.if i would get again.i would go
something bigger than RS2'd and 2871 since you already paid for the exhaust,downpipe flange,any fabricated hardware,exhaust manifold,oil and coolant lines.this's cost you a fortune when you're going to upgrade again.i would go for something like 30R or equivalences.lower boost but better flow.remember my car is normally for a DD purpose.i don't need a biggest power.I'm not ready to spend the time doing bottom end upgraded yet.Choosing the right turbo with the right driving purpose.