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Old 04 August 2007, 12:07 AM
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frayz
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Default Need your feedback please guys... yes all of ya

Okay, heres the deal.

What would your perfect scooby exhaust be like?

Im just trying to get an idea here as to what people look for when it comes to an exhaust system for their Subaru and quite importantly the back box design.

Please can you post what you feel is most important to you in a system,

How you think the rear box should look?

How loud it should be?

Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?

Tip dia: 3", 3.5", 4" or 4.5"?

Do you use your car for street or track?
Old 04 August 2007, 12:30 AM
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FLAT ERIC
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Originally Posted by frayz
Okay, heres the deal.

What would your perfect scooby exhaust be like?

Like mine.

Im just trying to get an idea here as to what people look for when it comes to an exhaust system for their Subaru and quite importantly the back box design.

Please can you post what you feel is most important to you in a system,

In no particular order. Good fit, quality materials, the right sound & must not strangle the engine

How you think the rear box should look?

Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?

Tip dia: 3", 3.5", 4" or 4.5"?

Single round inward rolled, straight exit, rally style, 3.5" & plain polished (not titanium or carbon etc)

How loud it should be?

Loud at tick over & on boost but not droning for motorway cruising

Do you use your car for street or track?

You missed out shopping but I guess "street" covers that.
Mark
Old 04 August 2007, 12:41 AM
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frayz
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Cheers Mark, thats exactly what im looking for,

C'mon you lot, i want everyone to answer this
Old 04 August 2007, 12:52 AM
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FLAT ERIC
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Originally Posted by frayz
Cheers Mark, thats exactly what im looking for,

C'mon you lot, i want everyone to answer this
No probs.

Jess is at work so late night for me. But I guess the others are all

Mark
Old 04 August 2007, 06:31 AM
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yellowvanman
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Okay, heres the deal.

What would your perfect scooby exhaust be like?

Im just trying to get an idea here as to what people look for when it comes to an exhaust system for their Subaru and quite importantly the back box design.

Please can you post what you feel is most important to you in a system,


Basic engineering good practise - Form, Fit & Function


How you think the rear box should look?

Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?

Tip dia: 3", 3.5", 4" or 4.5"?

As FE, Single round inward rolled, straight exit, rally style, 3.5" & plain polished.

How loud it should be?

No louder than required to get the maximum output, and obviously under the db limit set at most circuits, they vary but typically;
Static 0.5m at 3/4 revs = 101 dB (A) and Secondly, and more significantly, drive-by noise limits measured at 20 metres, hard accelerating at over 60 mph (start finish straight), must not exceed 87 dB(A)


Do you use your car for street or track?
Old 04 August 2007, 07:20 AM
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itworldwide
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Supersprint lighweight back box on the back of an E46 CSL. Just add water...


Last edited by itworldwide; 04 August 2007 at 07:23 AM.
Old 04 August 2007, 09:16 AM
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Cornelius
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The exhaust on my old Scoob is my perfect exhaust

HKS unequal length headers including uppipe, H&S 3"downpipe with 2 1/2" reducer, H&S centre, H&S Jap spec 4" back box.
All polished stainless steel.

The system is as straight as possble for maximum gas flow, though if anything, I would prefer a 3" system, which I think would suit the EJ25 better
Old 04 August 2007, 09:53 AM
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Nate
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Please can you post what you feel is most important to you in a system,


As YVM - Form, Fit & Function


How you think the rear box should look?

Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?

Tip dia: 3", 3.5", 4" or 4.5"?

I personally went for 4" Jap style, mainly because Ian at H&S did a blinding deal on it.

How loud it should be?

I am now starting to lean towards your idea of a quieter exhaust (and I mean a lot quieter than it is now), it does pain me, when you get to a track day, to wonder whether you are going to be pulled from the track or not ....... I have a bung, but that just strangles the engine.

Do you use your car for street or track?

Both (occasionally)

Last edited by Nate; 04 August 2007 at 12:53 PM. Reason: I'm silly :)
Old 04 August 2007, 11:22 AM
  #9  
Milamber
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Originally Posted by frayz
How you think the rear box should look?

How loud it should be?
Difficult one this, quiet when driving at motorway speeds, quiet for a track but noisy for a cruise - doesn't help much I appreciate

Originally Posted by frayz
Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?
inward rolled straight exit. I wasn't keen on the idea for a downward facing exhaust......

Originally Posted by frayz
Tip dia: 3", 3.5", 4" or 4.5"?
Whatever gives the best flow I suppose

Originally Posted by frayz
Do you use your car for street or track?
I'm not getting the exhaust, what are you using yours for? museum piece at Zaks if the last 6 months are anything to go by
Old 04 August 2007, 01:27 PM
  #10  
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Tubular like the Vortex blending at an angle towards the tip.

Super shiney and I quite like titanium tips

slash cut, straight exit

3.5" - 4"

Loud enough to make me smile and onlookers not cringe.

Road
Old 04 August 2007, 03:09 PM
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The Blitz NUR Spec ticked all the boxes for me for street use.

The alternative for me if I was ever to change or wanted to be a serious track user would be something like the STi Genome box.



I have seen one without the colouring (polished off I believe) and I think it looks great. The sound is pretty good too, not too droney (sp?) but sounds nice on WOT!
Old 04 August 2007, 03:56 PM
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Originally Posted by FLAT ERIC
Mark
the only thing I'd add to that is a resonated centre section to keep the noise down a little...H&S all the way
Old 04 August 2007, 07:48 PM
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Large as poss, big as poss

Oh and flames coming out of it
Old 04 August 2007, 11:59 PM
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Originally Posted by cookstar
Large as poss, big as poss

Oh and flames coming out of it
Yup saves me quoting/posting ( Well you forgot noisy as poss )

Old 05 August 2007, 02:43 PM
  #15  
hoskib
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Originally Posted by SirFozzalot
The Blitz NUR Spec ticked all the boxes for me for street use.

The alternative for me if I was ever to change or wanted to be a serious track user would be something like the STi Genome box.



I have seen one without the colouring (polished off I believe) and I think it looks great. The sound is pretty good too, not too droney (sp?) but sounds nice on WOT!
the genome is what i've got and it's the best backbox i've ever had by a long way. it's an odd one, quiet under 2.5k then gets a bit louder, then caters for the nutter in all of us over 5k coughs and pops all on it's own aswell!!

if you could design something half as good frayz you'll be onto a winner

to answer you post:-

got to be round can and pipe. done to death, but it's the only way for a marketable product.

middle of the road loud. not quiet like a prodrive system, but not loud like a blitz. a few too many strict trackday regs nowadays.

straight exit

4" max. just get the feeling people are going to get bored with a drainpipe sticking out the back sooner or later.

all based on if you want to sell a product rather than a one off one your own car by the way
Old 05 August 2007, 08:37 PM
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frayz
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Cheers Hoskib,

Keep the replies coming guys
Old 05 August 2007, 09:07 PM
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Originally Posted by hoskib
. . . just get the feeling people are going to get bored with a drainpipe sticking out the back sooner or later.
Or more commonly called "The Reversed over Dustbin".

Mark
Old 05 August 2007, 09:31 PM
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frayz
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ASBO PIPE boys
Old 06 August 2007, 07:51 AM
  #19  
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Originally Posted by frayz
Okay, heres the deal.

What would your perfect scooby exhaust be like?

Im just trying to get an idea here as to what people look for when it comes to an exhaust system for their Subaru and quite importantly the back box design.

Please can you post what you feel is most important to you in a system,

How you think the rear box should look?

Plain and Simple design Cylindrical Back box with round tail

How loud it should be?

Quiet at idle, throaty when blipping the throttle....

Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?

Round rolled inward, straight angle

Tip dia: 3", 3.5", 4" or 4.5"?

3.5, 4 max (about 10 for tunnel run?)

Do you use your car for street or track?
Mainly street, but track soon
Old 06 August 2007, 08:25 AM
  #20  
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Frayz,

Does this mean that Primary Designs are looking at making an off the shelf system?


Please can you post what you feel is most important to you in a system,
1.Performance gain. 2.Sound. 3.Quality. 4.Price.

How you think the rear box should look?
I prefer a slightly duller finish, I don't like the highly polished look.

How loud it should be?
100dB at 4.5k. I like the sound from unequal headers, but don't want a boomy exhaust at 70-80mph.

Tip style: slash cut, outward rolled, inward rolled, angled exit, straight exit, jap style or rally style?
Inward rolled.

Tip dia: 3", 3.5", 4" or 4.5"?
4"

Do you use your car for street or track?
Street with a planned trip to the Ring (if I ever get time off work!)

And one question I think you missed. High flow Cat. I can't be arsed with any hassle from the cops or come MOT time.

Hope this helps!
Old 06 August 2007, 09:04 AM
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Originally Posted by frayz
ASBO PIPE boys
Did you ever hear xkellyx's exhaust on tunnel run II? Straight through scaffold pipe I think. Sounded like a nascar

Now THAT was an asbo pipe.
Old 06 August 2007, 09:56 AM
  #22  
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Originally Posted by SirFozzalot
The Blitz NUR Spec ticked all the boxes for me for street use.

The alternative for me if I was ever to change or wanted to be a serious track user would be something like the STi Genome box.



I have seen one without the colouring (polished off I believe) and I think it looks great. The sound is pretty good too, not too droney (sp?) but sounds nice on WOT!
STi Genome....

Thats what mine had when I got it....
Old 06 August 2007, 10:26 AM
  #23  
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What did you do with it? They are worth quite a bit. Very rare over here and not cheap!
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