Exhaust boxes n bhp
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How many ponies do people think you loose per exhaust box? Mine is too loud and am contemplating adding another box or two to take some of the edge off but don't want to be loosing lots of power. I've heard mixed reviews on how much you loose per box. Cheers in advance
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i dont want to change the back box! i just want a simple answer to my fairly simple question. ive been told that the bhp loss is as little as 1 bhp but is there any thruth in that?
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How many ponies do people think you loose per exhaust box? Mine is too loud and am contemplating adding another box or two to take some of the edge off but don't want to be loosing lots of power. I've heard mixed reviews on how much you loose per box. Cheers in advance
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I have just changed from a fully decatted afterburner vortex to a 3' jap system With a sports cat & the car feels more responsive. Similarly people have changed from a sports cat to a blitz nur spec r and actually lost power. Speak to any recognized mapper and they will tell you that loudness does not equal power. Sometimes adding a resonator to a straight through system can actually aid back pressure in the system.
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Resonator boxes usually just quieten the drone for decatted systems within the cabin. I had a non-resonated Cobra Race Tube and that was bloody loud in the cabin for drone. Was only a catback running on a standard downpipe! Then went to a system with an actual backbox on it with a resonated centre section and decat downpipe. Was quieter all round,more so in the cabin and the noise just comes out the back
As it should.
Simple solution is get a resonator put into your centre section, simple chop out, weld in job. This shouldn't lose you any kind of power but will quieten it down at least inside when driving.
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Simple solution is get a resonator put into your centre section, simple chop out, weld in job. This shouldn't lose you any kind of power but will quieten it down at least inside when driving.
Andy
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As said buddy, the best bet is to change the backbox, if you like the look of your backbox whatever that maybe then adding a resonator may help, but its not the answer in my opinion.
starting with loud in my experience:
- Blitz
- Jap Speed
- eBay sh!te
- Miltek
- Cobra
- Cant recall my current one but it very quiet
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Thanks rob for that! Thought We stick together us lanashire lads! It's a one piece hns system fully decatted and 3" and I like the look of it and the sound of it, ie the note and the rumble etc, basically just wanted to turn the volume **** down a bit. Adding a box in the middle would do the trick for me and that's what I'll do, I just wanted people's opinions on weather I'd loose bhp with adding a box. I think the topic has been covered. Thanks chaps.
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Thanks rob for that! Thought We stick together us lanashire lads! It's a one piece hns system fully decatted and 3" and I like the look of it and the sound of it, ie the note and the rumble etc, basically just wanted to turn the volume **** down a bit. Adding a box in the middle would do the trick for me and that's what I'll do, I just wanted people's opinions on weather I'd loose bhp with adding a box. I think the topic has been covered. Thanks chaps.
Hope this helps
Rob
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Theres a place in St.Helens,BCS he will put on what ever you need/ask
for.Co-owner is Nigel used to be co-owner of Blueflame.I was going
to go de-cat 3" straight through system accept for the noise,but Dave
the fitter cut my sports cat pipe back till it measured 3".Then fitted the new
peice of exhaust to fit the remainder of my original PPP 2.5" exhaust.I can now
add whatever i want in 3" when and if i decide to.It's another option.Their work is excellent and Dave the fitter is first class.A lot of the RS lads use him.
for.Co-owner is Nigel used to be co-owner of Blueflame.I was going
to go de-cat 3" straight through system accept for the noise,but Dave
the fitter cut my sports cat pipe back till it measured 3".Then fitted the new
peice of exhaust to fit the remainder of my original PPP 2.5" exhaust.I can now
add whatever i want in 3" when and if i decide to.It's another option.Their work is excellent and Dave the fitter is first class.A lot of the RS lads use him.
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But the right amount of back pressure will allow a turbo to work to its true potential.
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