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Wanting a deeper exhaust note 

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Thu Jul 21, 2011 10:58 am 
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Get some twin pipes setup to split from besides the dif, i went from a single 2.5 to this and it is much louder and deeper when idling. It does drone a bit but I just have the music up a bit more and dont notice it.

here is a video of it, more pics and info in my build thread (middle of page 3)

http://www.youtube.com/watch?v=_ixIFnTJZjI&

 

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 Post subject: Lost low down power
Posted: Tue Jul 26, 2011 10:30 pm 
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Hey I've just put a full pacemaker system including extractors and a yella terra cold air induction , sounds bloody awesome , but noticed it's lost initial take off , like as if it's not as responsive ? Do u think it needs a tune ??? Ba xr6 mk2

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Tue Jul 26, 2011 11:02 pm 
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exhaust back pressure is good for instant off the line torque, putting aftermarket headers on reduces the back pressure, and hence the reduction in off the line.
but to be honist you really shouldn't notice it that much, plus the extra power once the revs kick up should outway any reduction off the line.
what pacemaker headers did you get? 4490 or 4495

 

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BA XR6
Performance mods: typhoon + territory pipe with K&N filter, full exhaust, BPR generic tune, lowered, xr6t front brakes, territory rear brakes
Visual mods: 19" rim, lower grill mesh, oil pressure and vacuum gauges, engine bay lighting, foot well lights
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 Post subject: Re: Wanting a deeper exhaust note
Posted: Tue Jul 26, 2011 11:37 pm 
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Yea ok I no wat ur saying , cheers for that , I think they put the 4490's on which are more suitable for an auto , once warmed up it sounds good !! Can u recommend more mods I should do next ? I'm thinking the 75 mm throttle body or is it a waste for non turbo ?? Maybe an underdrive n cams :)... Ba xr6 , 2004 mk 2 , 130000 ks , 4 speed

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Tue Jul 26, 2011 11:50 pm 
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4490's are more suited to road, they have more lower end torque then the 4495's which are suited to racing, so you made the right choice, ive got 4490's on mine and don't really notice a response lag (at least one not caused by the drive by wire). as for other mods, not really sure, haven't gone that far on my car

 

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BA XR6
Performance mods: typhoon + territory pipe with K&N filter, full exhaust, BPR generic tune, lowered, xr6t front brakes, territory rear brakes
Visual mods: 19" rim, lower grill mesh, oil pressure and vacuum gauges, engine bay lighting, foot well lights
some of my main mods

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 12:21 am 
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Yea that's correct , I have a random Q ,, do u Think ur car feels quicker with say a full tank of fuel compared to under a quarter tank ?? I tend to fill it right up with 98 , is 98 ok for our engines ?

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 12:46 am 
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98 is fine mate, also dont waste your time with the 75mm TB, for the price of them (unless you find a really cheap one) they arent worth the money.

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 1:03 am 
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Ok thanks for the info , what will I gain from a flash tune ??

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 7:03 am 
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quite alot mate, i am assuming you are talking about a custom flash tune and not a generic one. Try and do all your mods first and then get the tune last so you don't have to keep coming back and shelling out for a new one each time you mod your car.

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 10:10 am 
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Yea that makes sence , I'll get cams last then the tune ,, wat do u think about a 20% underdrive pulley ? Do u now any one who has installed one ? Worth doing ?

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 10:57 am 
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winman wrote:
exhaust back pressure is good for instant off the line torque, putting aftermarket headers on reduces the back pressure, and hence the reduction in off the line.
but to be honist you really shouldn't notice it that much, plus the extra power once the revs kick up should outway any reduction off the line.
what pacemaker headers did you get? 4490 or 4495

Quoted for inaccurate know it all. Backpressure is bad, it does not create more torque. Exhaust gas velocity is what helps. Stock manifolds are done on the cheap.

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 6:23 pm 
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yeah mate, i put one on my car (there is a write up of it in build thread with pics) I think it made a decent difference and for the price you can't go wrong with it. Hit up Justin at Tuff Car Parts - he sells complete kits and very cheaply

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 9:31 pm 
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winman wrote:
exhaust back pressure is good for instant off the line torque, putting aftermarket headers on reduces the back pressure, and hence the reduction in off the line.


Your explanation is a f**k joke right? Please never post regarding the physics of an exhaust system again.

**edited and moderated :lol:

 

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Last edited by skidder on Wed Jul 27, 2011 9:38 pm, edited 2 times in total.

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 9:35 pm 
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Sweet dude, hey did u get a tune after u put ur exhaust n air set up on ? A flash tune will improve the extractor flow and air setup !! Correct ?

 

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 Post subject: Re: Wanting a deeper exhaust note
Posted: Wed Jul 27, 2011 11:13 pm 
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67RCE wrote:
winman wrote:
exhaust back pressure is good for instant off the line torque, putting aftermarket headers on reduces the back pressure, and hence the reduction in off the line.
but to be honist you really shouldn't notice it that much, plus the extra power once the revs kick up should outway any reduction off the line.
what pacemaker headers did you get? 4490 or 4495

Quoted for inaccurate know it all. Backpressure is bad, it does not create more torque. Exhaust gas velocity is what helps. Stock manifolds are done on the cheap.


I noticed in an earlier post he talked about which extractors he had...you have to wonder why he bothered if he thinks extractors are no good??

 

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