Discussion in 'General Discussion' started by chris2982, Saturday 27th Jun, 2015.
Honda FR-V 2.2 CDTi Pipercross Air Filter Px-PP1812 Only Â£28.79
Im curious whether performance filters actually make any difference on diesel engines.
That is a lot for postage however
Shipping is just marked that high as that's where the profit comes from
We have an account with one of their distributors, ironically to get in an individual filter the postage cost means we can't even be much cheaper
annoyingly they were the cheapest place I could find it. . . but by the time the postage goes on it works out the same price as everywhere else lol
In honestly mate you're not going to see any gains on a forced induction diesel, absolutely none. On a naturally aspirated petrol you'll be lucky to see 1-2HP at the top-end.
I have a theory that air filter flow capability is MORE important on diesel engines. On a petrol engine the air flow is already impeded by the presence of a throttle, so additional restriction caused by an inferior filter merely looks like a slightly less open throttle. So performance is only affected at wide open throttle. But, on a diesel, it is vital to get the maximum cylinder charge for optimum performance in all conditions.
A guy on Civinfo tested a range of available air filters available for the I-CTDI and found the OEM airbox and filter to give the best flow rates.
The thing is with air filters it's a matter of balance, performance filters flow slightly better at the cost of slightly lesser filtration. K&N, Pipercross and the like just decide they're willing to forego a slight bit more filtration for air flow than OE.
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