Will Damaged Exhaust Harm My Turbo

Technical questions and answers about the Mazda Bongo

Moderators: Doone, westonwarrior

Locked
thedogsbollox
Tribal Elder
Posts: 867
Joined: Sun Mar 30, 2008 1:42 am
Location: South Harrow, Middlesex

Will Damaged Exhaust Harm My Turbo

Post by thedogsbollox » Wed Aug 06, 2008 2:19 pm

As the title says, i have a blowing exhaust, around the back box and whilst not that noticable i was worried that it may have an ill affect on the turbo. Any views on this?
scanner
Supreme Being
Posts: 7247
Joined: Wed Sep 19, 2007 10:20 pm
Location: Cambs

Re: Will Damaged Exhaust Harm My Turbo

Post by scanner » Wed Aug 06, 2008 2:50 pm

thedogsbollox wrote:As the title says, i have a blowing exhaust, around the back box and whilst not that noticable i was worried that it may have an ill affect on the turbo. Any views on this?

No effect whatsoever I ran mine without a back box for a while and somebody (can't remember who) has actually done away with the back box altogether and just has a length of flexi-pipe - it has passed MOTs OK.

Turbos actually prefer an open pipe and no back pressure.

Take the back box off and just get a length of pipe welded on.
thedogsbollox
Tribal Elder
Posts: 867
Joined: Sun Mar 30, 2008 1:42 am
Location: South Harrow, Middlesex

Re: Will Damaged Exhaust Harm My Turbo

Post by thedogsbollox » Wed Aug 06, 2008 5:19 pm

scanner wrote:
thedogsbollox wrote:As the title says, i have a blowing exhaust, around the back box and whilst not that noticable i was worried that it may have an ill affect on the turbo. Any views on this?

No effect whatsoever I ran mine without a back box for a while and somebody (can't remember who) has actually done away with the back box altogether and just has a length of flexi-pipe - it has passed MOTs OK.

Turbos actually prefer an open pipe and no back pressure.

Take the back box off and just get a length of pipe welded on.
Lovely as i like the note from it. HEHE
scanner
Supreme Being
Posts: 7247
Joined: Wed Sep 19, 2007 10:20 pm
Location: Cambs

Re: Will Damaged Exhaust Harm My Turbo

Post by scanner » Wed Aug 06, 2008 5:28 pm

That stupid over sized back box and the way it is hung right on the end of the exhaust is a monstrous design flaw - when mine goes, it goes - permanently.

It'll be a length of 3" stainless pipe poking out from under the bumper.
User avatar
dreamwarrioruk
Supreme Being
Posts: 2226
Joined: Wed Sep 28, 2005 7:39 pm
Location: york
Contact:

Re: Will Damaged Exhaust Harm My Turbo

Post by dreamwarrioruk » Wed Aug 06, 2008 5:43 pm

just changed ours for a full s/s system this weekend. cant believe how much of a difference its made. better throttle response now with a sweet purring note till you put the foot down then it roars and takes off like a rocket. well worth it coupled with a k and n filter. the back pressure from that great wacking back box must hinder the flow greatly. get rid asap to release the potential of the bongo.
mike, jo and emma
thedogsbollox
Tribal Elder
Posts: 867
Joined: Sun Mar 30, 2008 1:42 am
Location: South Harrow, Middlesex

Re: Will Damaged Exhaust Harm My Turbo

Post by thedogsbollox » Wed Aug 06, 2008 5:54 pm

dreamwarrioruk wrote:just changed ours for a full s/s system this weekend. cant believe how much of a difference its made. better throttle response now with a sweet purring note till you put the foot down then it roars and takes off like a rocket. well worth it coupled with a k and n filter. the back pressure from that great wacking back box must hinder the flow greatly. get rid asap to release the potential of the bongo.
I have actually noticed the difference already.
Is the SS one straight thru or is there a box involved?
How much for it, and is it indestructable?
User avatar
dreamwarrioruk
Supreme Being
Posts: 2226
Joined: Wed Sep 28, 2005 7:39 pm
Location: york
Contact:

Re: Will Damaged Exhaust Harm My Turbo

Post by dreamwarrioruk » Wed Aug 06, 2008 6:06 pm

small back box about a 1/3 of the size of the original box. rest straight through. made from 304 guage i think. comes with a lifetime guarentee even if i change bongos. hand made while you wait
from longlife at leeds but i think there are other depots around the country. they had 3 bongos in last week and they seem very popular with owners for no hassle etc. prices have gone up slightly since people first started putting them on but the full system from the manifold was £329. you can choose from around 50 tailpipes but this bumps up the price. i asked if they could change the noise to mild sports but he said no need to bother as the standard box would give out a sporty note.
mike, jo and emma
thedogsbollox
Tribal Elder
Posts: 867
Joined: Sun Mar 30, 2008 1:42 am
Location: South Harrow, Middlesex

Re: Will Damaged Exhaust Harm My Turbo

Post by thedogsbollox » Wed Aug 06, 2008 6:26 pm

dreamwarrioruk wrote:small back box about a 1/3 of the size of the original box. rest straight through. made from 304 guage i think. comes with a lifetime guarentee even if i change bongos. hand made while you wait
from longlife at leeds but i think there are other depots around the country. they had 3 bongos in last week and they seem very popular with owners for no hassle etc. prices have gone up slightly since people first started putting them on but the full system from the manifold was £329. you can choose from around 50 tailpipes but this bumps up the price. i asked if they could change the noise to mild sports but he said no need to bother as the standard box would give out a sporty note.
Sounds sweet, just e-mailed them for a quote. Have a centre quite close in Battersea. I Let them know that Leeds have done a few in case they never heard of it.
Would i be better to get my waxoyl done before or after changing the exhaust?
User avatar
dreamwarrioruk
Supreme Being
Posts: 2226
Joined: Wed Sep 28, 2005 7:39 pm
Location: york
Contact:

Re: Will Damaged Exhaust Harm My Turbo

Post by dreamwarrioruk » Thu Aug 07, 2008 6:39 pm

hi tony, it depends if you want to get black gunk on the new exhaust. all areas are accessable before the exhaust goes on.
when i waxoiled ours it was very messy, got most of it on me lying underneath the bongo on an old tarp.
mike, jo and emma
thedogsbollox
Tribal Elder
Posts: 867
Joined: Sun Mar 30, 2008 1:42 am
Location: South Harrow, Middlesex

Re: Will Damaged Exhaust Harm My Turbo

Post by thedogsbollox » Thu Aug 07, 2008 10:33 pm

dreamwarrioruk wrote:hi tony, it depends if you want to get black gunk on the new exhaust. all areas are accessable before the exhaust goes on.
when i waxoiled ours it was very messy, got most of it on me lying underneath the bongo on an old tarp.
Naaaa, no worries there mate, gonna get the profs to do that. Just thought that if the gunk got on the exhaust it would stink a bit. So get the waxoyl done then the exhaust.
Locked

Return to “Techie Stuff”