Hi,

Who has a full exhaust line replacement from Scorpion without any cat. Experiences and hp gain?

Thx for you feedback.

Peter

 

Peter.

I have a full Scorpion system (inc d/p) and it is nothing short of awesome!
The sound is unreal, and the power gains are very impressive (see

 

Hi Stef,

My car (std MY99) was dynoed a couple of weeks ago at 221 hp. Have fitted 4 piece Scorpion catless system (2.5 in) since Monday. Sound is brilliant, car is more willing to take up and slightly quicker going in the revs.

Looking at your dyno I am amazed by the result!...

I was under the impression that the Scorpion would give something like 10 hp and the induction kit another 10 hp max.

Have you gained 40 hp by just fitting the exhaust and induction kit or did you make other mods to your car?

Thx for letting me know.

Peter

 

Peter.
It is widely accepted that the dyno at PE is probably about 10% inaccurate.
Standard cars get around 235bhp there, that have got 210bhp elsewhere.
I expect my car to be around the 240bhp mark, which would mean a gain of 30ish bhp. I expect this to be a realistic gain, it certainly feels like it!!!!!
The exhaust and filter are my only mods, although I do have the older 3" system.
As I said, I'm running on a different roller in a couple of weeks so we'll see how they compare then.

Stef.

 

Hi Stef,

Measured my car today at Roegis in Eeklo (Belgium) together with some other members of the Dutch Subaru Club (of which I am also a member).

Here the facts for Scorpion with K&N replacement airfilter:

P max = 173.7 kW or 236 hp @ 6000rpm and 177.5 km/h
M max = 303 Nm @ 4160 rpm and 123 km/h

At the wheels: 141.5 kW or 192 hp.

+/- 25000 km, T = 15ŗC and 993hPa

Conclusion: I don't believe the replacement airfilter adds much. So the Scorpion is good for about 15 hp.

I am not an expert in induction kits. What could you "normally" expect from the K&N kit?

Cheers, Peter

 

Just curious ive got a 95 WRX 260 bhp. Fitted a Hyper Jasma system with stainless backbox with 5 inch tail. Together with a K+N panel filter sounds the muts nuts!! and the increase in performance is well noticeable . But in BHP how many more horses am i getting.

 

Peter.
I reckon the induction kits good for another 8bhp or so.

Graham.
Not as much as it would be with an induction kit!!! ;D

Stef.

 

Evo,

I would question your Flywheel and wheel bhp figures!

Only 44 bhp loss through your transmission - sounds a bit suss to me!

The only defacto guidlines I can tell you, is that you will not see mega hp differences (circa 20 bhp), unless you ditch BOTH cats.

The air filter will help the addition, but will only amount to a very small increase.

Shaun.

 

Stef,

Thanks for the input. That's also what I found in the "Scooby Tuning" article of Japanese Performance. I think your 30ish estimation is close. Of course also the air temp. and eventual addition of an extra external cooler could give better (read higher) test results.

Shaun,

Take a look at the scans you can find on

 

Evo,

I understand that your figures are based on actual rolling road figures. But any rolling road in the whole world, that told me a subaru only loses 44 bhp through the transmission is wrong!! You should be expecting around 70 bhp.

As has been mentioned before in other threads, rolling roads can be very inaccurate. The differences in the wheelbase set on 4WD rollers (even differing in only cm's when aligned with the car), can make tremendous differences on Scooby dyno runs! The operator should always make sure, that the speed reading on the rear rollers is the same as the front rollers.

What were you figures prior to mods?

Shaun.

 

Is the Scorpion system much noisier than a Scoobysport?
It does seem to be good value for money.

 

Shaun,

In the "real" world indeed you will loose more then the 44 hp because road surface, Cx turbo pressure (the more "resistance" the more it will build up vs. no virtually no resistance on the road) and atmospheric conditions will play a role you don't measure on the rolls. The hp is measured according to an EEC standard and the computer program "adjust" the actual figures to the std (Temp/pressure) conditions.

The only way to measure is to take the engine out and measure it there ... but hey life is a compromise...

Chris,

In my honest opinion there is no huge difference between fully open system and backbox replacement. Different story when you put in a chip or start playing with the turbo pressure.

About the 4 piece 2.5" Scorpion that I have (picture on

 

Shaun,

Just forgot to mention my std MY99 had 221 hp at 6000 rpm (177 km/h) and 287.6 Nm at 4150 rpm (P at the wheels 128.6 kW).

Also during the measurements slip between the wheels and the rolls is detected pointing out that the "bridge" isn't set-up properly for the car.

Cheers,

evo

 

MY99 with the 2 peice Scorpian 3" system and 4" tail pipe + the new piper X vector induction kit. It sounded great. Last week I had a Scorpian downpipe fitted also. It is now LOUD, inside and out. The throttle response is much improved below 3500 rpm. The sound is amazing. The dump valve can be heard through the induction kit, which itself can be heard sucking. The turbo can be heard spinning up with a whistle on gear change. All with the background noise of the Exhaust. What a result, you beauty I only look at Max Power to see the *****.

 

I'm with you guys on the sound of the Scorpion system. I used to have one on my first MY95 Impreza and it made a massive difference. I had the 2 piece with a 4inch tailpipe one. I didn't have the downpipe removed on this car but even so, I found the Scorpion exhaust to be bordering on unbearable inside the cabin on motorway trips. The main problem was the exhaust booming into the cabin. I'm surprised you guys haven't noticed it!

Nito (perfect hearing)

 

hi leigh,
hows things,

been in touch with pipercross when i last spoke to you but haven't heard anything from them,i heard the main geeza has just got a new turbo so i pressume there using that,do you know if thats the case?

the exhaust and filter swap really need doing asap but i cant decide on which to have,minimal noise is essential as i have 2 little uns in the back,i really want the vector and scorpion but not downpipe,would you say the noise is ok inside or too loud, as standard(u probably dont remember)you only hear tyre noise.

cheers paul

 

Hello Paul

The noise with just the exhaust fitted was not that great while cruising at 70 or driving around town. You do get a bit more bass at 80-85 but it seemed to pass if you went a bit faster(any excuse) At tick over it sounds brill, low and deep like a V8 or Harley. The Filter however is very noisy, It took me some time to decide to keep it fitted. On a long journey it will encourage you to use a little less right foot as the induction noise can become a pain. I would go for the exhuast, it adds so much character to the car. But have a listen to someone elses filter fitted car before you go for the filter.

 

Ive also got the Pipercross/Scorpion system and would agree with Mr leigh...Pipercross is very intrusive - have the downpipe it sounds much more cultured!

jase.

 

cheers guys

i'll meet you one dinner leigh and have a test please,i dont think induction noise will be a problem as with it being up front the noise should be well away from little ears and i bet it sounds awesome when driving.
paul

 

Proven Products 01822 613200 have 2 of the older style 4" Scorpoin systems available if anybodies interested.

I know this having just ordered one.

Ask for John.

 

ryan,
when you say older system is that the one with the 4 inch rolled in pipe or is this the new one.

cheers

 

Does the Scorpion Downpipe have a catalyst? Is there a full Scorpion system with a cat?

 

The older style Scorpion exhaust's are 4", the current one's are 3".

 

Hello EVO,
I'm a MY98 owner from Switzerland. I want to ask you something about this exhaust:
My car has Supersprint downpipe and Remus backbox the center catalyst is still in
place. The car is rather loud.
Is the whole Scorpion System (without catalyst) louder than the system I have?
From your rolling road informations it seems, that the Remus backbox isn't very
good, what do you think?
Where could I buy the Scorpion exhaust? (I know efije in France, but are they the
only company outside UK who sells scorpion exhausts? Do you know, where they
are produced? Do they have a homepage?).
Another question: What is the EMS-chip (how much bar pressure?) and how much
does it cost to fit?
greetings
ric

 

Hi ric,

One thing is for sure, my 4 piece Scorpion exhaust (as the picture on EFJIE's site, btw they are "ripping off" people) makes a lot more noise than the SS/Remus combination outside the car ...inside I find it is very acceptable...go into a tunnel with open window and you'll need a hearing aid afterwards...it's very hard above 4000rpm vs. the lower tone sound of e.g. Scoobysport

However the SS/Remus option is commonly used by the Dutch Rallydriver and tuner Mark Verhoeven which you can contact at: