All Things Mk5 > Performance Modifications
BCS / Powervalve
AJP:
--- Quote from: Powervalve Nige on February 19, 2016, 12:12:34 pm ---Everyone's different - we're like Burgerking... you can have it your way :happy2:
--- End quote ---
And those special oversize cats you build are real whoppers..
Sorry, that was terrible. But I couldn't resist
Powervalve Nige:
Yeah - the 140mm dia one that we are developing for the 90mm version we'll call the double whopper :jumpmove:
Adam0604:
--- Quote from: Powervalve Nige on February 20, 2016, 10:22:58 am ---Yeah - the 140mm dia one that we are developing for the 90mm version we'll call the double whopper :jumpmove:
--- End quote ---
140mm you say :evilgrin:
When will this be ready
AJG09:
Really hope this isnt a daft question but what benefits would you get from having an oversized cat?
Genuinly do not know this :smiley:
AJP:
--- Quote from: AJG09 on February 20, 2016, 02:15:53 pm ---Really hope this isnt a daft question but what benefits would you get from having an oversized cat?
Genuinly do not know this :smiley:
--- End quote ---
It maintains flow and keeps it on level terms with a decat.
With a 'normal' size sport cat (I won't name other exhaust manufacturers, but you know them) you may lose flow in comparison to a decat pipe, simply due to design restrictions.
By increasing the size you get around this problem.
Plenty of us don't want the potential hassle of a decat pipe at MOT time, so it's really good that the Powervalve cats are a worthy option in terms of performance potential.
If you get the chance to look at any dyno graphs of cars with Powervalve sports cats you'll see just how well they flow. The curves are incredible, especially with a bit of R-Tech magic.
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