How restrictive are the OEM exhausts?
07-26-2015, 03:11 PM
#12
As above, the weight is the only factor for me.
My supercharged car (16psi) makes more power with a 60/50mm dual than with a 3" dual.
Pipe design is different so they are not directly comparable but a good indicator that OEM pipe size is enough.
You loose more down low than you gain up top with a 3" exhaust, from my experience.
My supercharged car (16psi) makes more power with a 60/50mm dual than with a 3" dual.
Pipe design is different so they are not directly comparable but a good indicator that OEM pipe size is enough.
You loose more down low than you gain up top with a 3" exhaust, from my experience.
07-26-2015, 10:36 PM
#13
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Originally Posted by Raffe' timestamp='1437936098' post='23693458
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
Thank you to all those whose input was more valuable than others.
07-27-2015, 12:20 AM
#14
A GOOD reason for replacing the stock exhaust if tracking is what you want to do, otherwise as Blackadder said, "It's like a pencil with no lead......pointless."
07-27-2015, 12:56 AM
#15
Originally Posted by Toms1989' timestamp='1437947257' post='23693577
[quote name='Raffe' timestamp='1437936098' post='23693458']
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
Thank you to all those whose input was more valuable than others.
[/quote]
Always better going with something less permanent. Here's a video of mine for an idea.
https://youtu.be/NDydC-O6efM
07-27-2015, 01:05 AM
#16
UK Moderator
Originally Posted by Ultra_Nexus' timestamp='1437948501' post='23693595
The weight is the biggest gain. When you think that a carbon bonnet costs £400 and saves you 2-3kg and an exhaust costs £600 and save you 20kg, it's worth it. Not that you'll notice the weight change on the road at all!
A GOOD reason for replacing the stock exhaust if tracking is what you want to do, otherwise as Blackadder said, "It's like a pencil with no lead......pointless."It's also worth noting that a £400 carbon bonnet has a good chance of being heavier than the OEM aluminium one.
07-27-2015, 01:21 AM
#17
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Originally Posted by Toms1989' timestamp='1437947257' post='23693577
[quote name='Raffe' timestamp='1437936098' post='23693458']
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
Thank you to all those whose input was more valuable than others.
[/quote]
Philys, where are you having the exhaust mod done?
07-27-2015, 06:58 AM
#18
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It is all relative and depends on future plans such as boost. My custom 70mm Twin with 70mm Tpipe and Megan manifold gained 40bhp midrange and 20bhp peak.
What difference it would of actually of made with the standard exhaust on its own wasn't worth finding out given that the map would need changing so i just did all i could and then its done.
Remember that any aftermarket system is likely to drone pretty bad.
What difference it would of actually of made with the standard exhaust on its own wasn't worth finding out given that the map would need changing so i just did all i could and then its done.
Remember that any aftermarket system is likely to drone pretty bad.
08-01-2015, 01:57 AM
#19
It is all relative and depends on future plans such as boost. My custom 70mm Twin with 70mm Tpipe and Megan manifold gained 40bhp midrange and 20bhp peak.
What difference it would of actually of made with the standard exhaust on its own wasn't worth finding out given that the map would need changing so i just did all i could and then its done.
Remember that any aftermarket system is likely to drone pretty bad.
What difference it would of actually of made with the standard exhaust on its own wasn't worth finding out given that the map would need changing so i just did all i could and then its done.
Remember that any aftermarket system is likely to drone pretty bad.
I've just purchased a Tegiwa Manifold, which the collecter size is 63mm, test pipe is 63mm and oe catback in 63mm right up to the collecter for the two pipes.
All being well I hope to get a HKS charger kit for her 12-18 months down the line. So I could get the catback ready for then.
Think i'll get it mapped with the oem catback for now and let you all know the results
08-03-2015, 10:21 AM
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Originally Posted by Raffe' timestamp='1437978990' post='23693877
[quote name='Toms1989' timestamp='1437947257' post='23693577']
[quote name='Raffe' timestamp='1437936098' post='23693458']
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
[quote name='Raffe' timestamp='1437936098' post='23693458']
Has the de-cat made the exhaust rasp, as I hate this and will avoid if thats the outcome?
Thank you to all those whose input was more valuable than others.
[/quote]
Philys, where are you having the exhaust mod done?
[/quote]
TGM, when you have a spare weekend we will have to meet up so you can have a listen as to what you think