Login    Register

Exhaust Help please

Ask your technical questions here.

Moderators: WR 1mposter, The Swede, Megaman, danr55, WR1 Bro

  • Author
    Message

Exhaust Help please

Postby 500tie » Wed Aug 26, 2009 10:38 am

Can the Prodrive backbox be fitted directly to a 3" centre section??
Sooty,
Needs a WR1 now his WRX300 is sold
Or a spec D
User avatar
500tie
 
Posts: 198
Joined: Sat Jan 03, 2009 4:30 pm
Location: Lyneham, Wilts

Re: Exhaust Help please

Postby WR1 Bro » Wed Aug 26, 2009 12:03 pm

500tie wrote:Can the Prodrive backbox be fitted directly to a 3" centre section??


Not without a modifcation as the prodrive backbox is 2.5inch
User avatar
WR1 Bro
Site Admin
 
Posts: 20279
Joined: Thu Aug 19, 2004 8:54 am
Location: If skinny, ugly and Scouse was best, then JohnMc would be a porn star legend.

Postby 500tie » Wed Aug 26, 2009 12:27 pm

Ah bugger thanks Bro
Sooty,
Needs a WR1 now his WRX300 is sold
Or a spec D
User avatar
500tie
 
Posts: 198
Joined: Sat Jan 03, 2009 4:30 pm
Location: Lyneham, Wilts

Postby CAVEMAN » Wed Aug 26, 2009 1:12 pm

take it to a local metal shop and either get it stretched out or cut a little off and put a reduction pipe on it.
CAVEMAN
 
Posts: 1130
Joined: Sun Mar 29, 2009 1:34 pm
Location: Seinajoki, Finland

Postby WR1 Bro » Wed Aug 26, 2009 1:13 pm

Marky Mark modified my Blitz to mate with the 3inch downpipe...
User avatar
WR1 Bro
Site Admin
 
Posts: 20279
Joined: Thu Aug 19, 2004 8:54 am
Location: If skinny, ugly and Scouse was best, then JohnMc would be a porn star legend.

Postby 500tie » Wed Aug 26, 2009 1:18 pm

Ive found a company that do a nice 3" de-cat down pipe and centre cat,
They also sell a part that make the 3" piece mate with the 2.5" standard centre section.

I was wondering if i could make it go 3" all the way back to the prodrive backbox but i dont think i can so im just going to get a 2.5" centre section without the silencer in it.
Sooty,
Needs a WR1 now his WRX300 is sold
Or a spec D
User avatar
500tie
 
Posts: 198
Joined: Sat Jan 03, 2009 4:30 pm
Location: Lyneham, Wilts

Postby WR1 Bro » Wed Aug 26, 2009 1:38 pm

500tie wrote:Ive found a company that do a nice 3" de-cat down pipe and centre cat,
They also sell a part that make the 3" piece mate with the 2.5" standard centre section.

I was wondering if i could make it go 3" all the way back to the prodrive backbox but i dont think i can so im just going to get a 2.5" centre section without the silencer in it.


If going for a 3inch de-cat downpipe it seems a little odd to then restrict the zorts to 2.5inch?
User avatar
WR1 Bro
Site Admin
 
Posts: 20279
Joined: Thu Aug 19, 2004 8:54 am
Location: If skinny, ugly and Scouse was best, then JohnMc would be a porn star legend.

Postby jimmy » Wed Aug 26, 2009 1:54 pm

remember it has to be an exhaust company that welds it as it has to be welded with a stainless steel welder.i got a qoute by a local exhaust firm to cut my exhaust off and weld another on and they said £62 inc VAT which isnt bad

good luck :wink:
ver9 grey blobeye sti
User avatar
jimmy
 
Posts: 150
Joined: Mon Aug 24, 2009 9:11 pm
Location: ayrshire

Postby Dipsy » Wed Aug 26, 2009 4:32 pm

jimmy wrote:remember it has to be an exhaust company that welds it as it has to be welded with a stainless steel welder.i got a qoute by a local exhaust firm to cut my exhaust off and weld another on and they said £62 inc VAT which isnt bad

good luck :wink:


A welding shop/blacksmith can weld a exhaust aswell with mig welder with stainless wire or better looking weld Tig and stainless filler wire
05 REG JDM Sti zl
Dipsy
 
Posts: 74
Joined: Thu Aug 23, 2007 5:31 pm
Location: Central Scotland

Postby jimmy » Wed Aug 26, 2009 4:34 pm

Dipsy wrote:
jimmy wrote:remember it has to be an exhaust company that welds it as it has to be welded with a stainless steel welder.i got a qoute by a local exhaust firm to cut my exhaust off and weld another on and they said £62 inc VAT which isnt bad

good luck :wink:


A welding shop/blacksmith can weld a exhaust aswell with mig welder with stainless wire or better looking weld Tig and stainless filler wire


an mot garage said me they couldnt do it because it has to be done by s/s welding lol :lol: :lol:
ver9 grey blobeye sti
User avatar
jimmy
 
Posts: 150
Joined: Mon Aug 24, 2009 9:11 pm
Location: ayrshire

Postby Dipsy » Wed Aug 26, 2009 6:10 pm

jimmy wrote:
Dipsy wrote:
jimmy wrote:remember it has to be an exhaust company that welds it as it has to be welded with a stainless steel welder.i got a qoute by a local exhaust firm to cut my exhaust off and weld another on and they said £62 inc VAT which isnt bad

good luck :wink:


A welding shop/blacksmith can weld a exhaust aswell with mig welder with stainless wire or better looking weld Tig and stainless filler wire


an mot garage said me they couldnt do it because it has to be done by s/s welding lol :lol: :lol:


They could of welded it with ordinary mild steel but the weld would rust :lol: :lol:
05 REG JDM Sti zl
Dipsy
 
Posts: 74
Joined: Thu Aug 23, 2007 5:31 pm
Location: Central Scotland

Postby 500tie » Wed Aug 26, 2009 7:29 pm

Just looked into it a little further and im going to get a straight through 3" system and have it chopped and welded onto the prodrive backbox.

Thanks for the advice guys
Sooty,
Needs a WR1 now his WRX300 is sold
Or a spec D
User avatar
500tie
 
Posts: 198
Joined: Sat Jan 03, 2009 4:30 pm
Location: Lyneham, Wilts

Postby jimmy » Wed Aug 26, 2009 8:24 pm

Dipsy wrote:
jimmy wrote:
Dipsy wrote:
jimmy wrote:remember it has to be an exhaust company that welds it as it has to be welded with a stainless steel welder.i got a qoute by a local exhaust firm to cut my exhaust off and weld another on and they said £62 inc VAT which isnt bad

good luck :wink:


A welding shop/blacksmith can weld a exhaust aswell with mig welder with stainless wire or better looking weld Tig and stainless filler wire


an mot garage said me they couldnt do it because it has to be done by s/s welding lol :lol: :lol:


They could of welded it with ordinary mild steel but the weld would rust :lol: :lol:


dont know if you've heard of them but ive heard many bad things about RMS exhaust's,they fitted my sports cat and left a bolt between my cross member which rattle and banged and gave me heart ake

:lol: :lol:

good luck with your new exhaust mate :wink:
ver9 grey blobeye sti
User avatar
jimmy
 
Posts: 150
Joined: Mon Aug 24, 2009 9:11 pm
Location: ayrshire

Postby WR 1mposter » Wed Aug 26, 2009 9:12 pm

500tie wrote:Just looked into it a little further and im going to get a straight through 3" system and have it chopped and welded onto the prodrive backbox.

Thanks for the advice guys


try the aps system

tailpipe almost identical

http://www.airpowersystems.com/us_spec/ ... hoe-r1.htm
2007 BMW M5
2004 Petter Solberg STi
User avatar
WR 1mposter
 
Posts: 14095
Joined: Mon Jun 27, 2005 12:04 am
Location: Sunny Falmouth

Postby WR1 Bro » Wed Aug 26, 2009 10:07 pm

If you are having a new exhaust system (down pipe and centre) why not get a back box to match?
User avatar
WR1 Bro
Site Admin
 
Posts: 20279
Joined: Thu Aug 19, 2004 8:54 am
Location: If skinny, ugly and Scouse was best, then JohnMc would be a porn star legend.

Postby jimmy » Wed Aug 26, 2009 10:37 pm

i prefer big back boxes,a 5-6" slash cut slanted to one side rocks my boat,only on a scooby tho as its like the only good sounding car about.

i know a few guy's that have taking the big back box off there car and got a smaller one and got the edge rolled like the prodrive one,not my taste but everyone's different.

i hate the oval shape that i currently have :puke:

:lol: :lol:
ver9 grey blobeye sti
User avatar
jimmy
 
Posts: 150
Joined: Mon Aug 24, 2009 9:11 pm
Location: ayrshire

Postby WR1 Bro » Wed Aug 26, 2009 10:48 pm

jimmy wrote:i prefer big back boxes,a 5-6" slash cut slanted to one side rocks my boat,only on a scooby tho as its like the only good sounding car about.

i know a few guy's that have taking the big back box off there car and got a smaller one and got the edge rolled like the prodrive one,not my taste but everyone's different.

i hate the oval shape that i currently have :puke:

:lol: :lol:


Oval is just wrong. Take a hammer to it and make it round ffs
User avatar
WR1 Bro
Site Admin
 
Posts: 20279
Joined: Thu Aug 19, 2004 8:54 am
Location: If skinny, ugly and Scouse was best, then JohnMc would be a porn star legend.

Postby jimmy » Wed Aug 26, 2009 11:26 pm

no need mate,i just baught a 5" carbon catback for a mighty £5,yes thats just a fiver for a cat back in good nick :wink:
ver9 grey blobeye sti
User avatar
jimmy
 
Posts: 150
Joined: Mon Aug 24, 2009 9:11 pm
Location: ayrshire

Postby MaverickUK82 » Thu Aug 27, 2009 9:54 am

Dipsy wrote:They could of welded it with ordinary mild steel but the weld would rust :lol: :lol:

Not only would it rust (corrode). But it would corrode at an alarming rate. When mixing metals in this way, a galvanic reaction occurs and the less noble metal (in this case the carbon steel) corrodes at an accellerated rate. The rate depends on the mass ratio of the metals.
Image
MaverickUK82
 
Posts: 660
Joined: Mon Jun 08, 2009 9:03 pm
Location: IOW

Postby CAVEMAN » Thu Aug 27, 2009 10:09 am

check you Mr Scientist!!

must be the brains of this operation....
CAVEMAN
 
Posts: 1130
Joined: Sun Mar 29, 2009 1:34 pm
Location: Seinajoki, Finland

Postby MaverickUK82 » Thu Aug 27, 2009 10:18 am

I'm an inspector of pressure systems and inspect piping every day. One of the main things we see is where stainless steel pipe has been bolted together with carbon steel nuts and bolts which have almost corroded through totally.
Image
MaverickUK82
 
Posts: 660
Joined: Mon Jun 08, 2009 9:03 pm
Location: IOW

Postby 500tie » Thu Aug 27, 2009 11:12 am

Sod it im going to get a 3" decat at the front and onto the blitz nur spec r just hope i dont go deaf soon.
Sooty,
Needs a WR1 now his WRX300 is sold
Or a spec D
User avatar
500tie
 
Posts: 198
Joined: Sat Jan 03, 2009 4:30 pm
Location: Lyneham, Wilts

Postby CAVEMAN » Thu Aug 27, 2009 12:35 pm

MaverickUK82 wrote:I'm an inspector of pressure systems and inspect piping every day. One of the main things we see is where stainless steel pipe has been bolted together with carbon steel nuts and bolts which have almost corroded through totally.


didn't realise that...I knew mixing ally with steel fixings has a bi-metallic reaction and just welds itself solid over a period of time...but didn't know SS and MS have that dramatic effect.

everday is a school day on here!
CAVEMAN
 
Posts: 1130
Joined: Sun Mar 29, 2009 1:34 pm
Location: Seinajoki, Finland

Postby MaverickUK82 » Thu Aug 27, 2009 2:36 pm

Here is a photograph of a 40mm carbon steel nut & bolt, bolted though a stainless steel flange (the flange is painted so it doesn't actually look like SS).

Image

The nut is about 7 years old, so that's how quickly carbon steel corrodes when in contact with stainless steel. I should imagine an exhaust would corrode through in less than a year.
Image
MaverickUK82
 
Posts: 660
Joined: Mon Jun 08, 2009 9:03 pm
Location: IOW

Postby jimmy » Thu Aug 27, 2009 8:18 pm

500tie wrote:Sod it im going to get a 3" decat at the front and onto the blitz nur spec r just hope i dont go deaf soon.


you'll love it mate,the louder the better :thumb:
ver9 grey blobeye sti
User avatar
jimmy
 
Posts: 150
Joined: Mon Aug 24, 2009 9:11 pm
Location: ayrshire

Return to Tech Help

Who is online

Users browsing this forum: No registered users and 22 guests

cron