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21st October 2018, 15:35 | #21 |
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R75 Saloon. Join Date: Feb 2009
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Gotta disagree.---
No benefit to fitting a K&N filter unless you drive with the rev counter on the red line all the time.---- The standard filter will do all you want of it. A formula 1 car might benefit but our old bread and butter bangers wont.---- Last edited by COLVERT; 21st October 2018 at 21:21.. |
21st October 2018, 21:50 | #22 |
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mg zt Join Date: Mar 2014
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Interesting discussion.
Less restrictive filter = more airflow? Well only if the rest of the restrictions on the way in and out allow - the most frequent one being the throttle plate. Electronic fi adjusting the fuel to compensate if there is more airflow? Only while the lambda is controlling - or more accurately compensating. At full power the efi is in open loop so if there is a pile more air going into the engine it will run weak. Finally, how many people on here extoling the k&n run a turbo k? And of these, how many also run a vvc inlet manifold? Well I have news for you - the step at the manifold to head joint causes a way bigger restriction at full power than your K&N will ever recover. Are the worth the cost? Up to the owner, I have one in my zt190 airbox, but it was sort of free.... |
22nd October 2018, 00:03 | #23 | |
Posted a thing or two
Rover 75 1.8t Join Date: Oct 2015
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Quote:
I'm aware of the Inlet Port Bore mismatch between VVC and Standard k-series heads - and the theoretical implications - is this something you have verified ? i.e any detrimental affect on performance with a VVC vs Standard Manifold ? - it's something i'd be keen to investigate on a dyno - 1.8t Paper vs K&N and Standard vs VVC Inlet manifold for Comparison I stated at the time of fitting the VVC that any Improvement in driveability was likely a Placebo affect - but.............. throttle response did feel Improved....yep that Old Chestnut I feel the need to state Again - K&N filters (and VVC inlet mods) for me are NOT about "Improved Performance" the way that term suggests - it's Not about Race Tuning Performance at full throttle my 1.8t has(d) No issue delivering Air at Full throttle - the Turbo needs Electronic Control to prevent too much Air being delivered the way we drive in reality is rarely full throttle - minor Improvements in Performance at varying throttle positions/Gear/Rpm/Running temp/Ambient temp/Elevation etc.. are something that may not be measured but can be Noticed by an Observant Owner/Driver. or we Can just repeat Hype and theoretical Performance "Facts" without Gauging for ourselves Paul. |
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22nd October 2018, 09:41 | #24 | |
This is my second home
ZT260 #243 (resting) Join Date: May 2010
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