K& N induction kit
- Thread starter drmeng
- Start date
gonzosquidgy
New member
I have one fitted to my 1998 996 tiptronic, and, although already fitted when I bought it a couple of year's ago, there does seem to be different sound from others of the same year and it does go like the proverbial. John
thirteeneast
New member
The sound is cancelled out/ deadend in the air box by the Helmholtz resonator its that little box inside it.
You can get more dB by capping it off but I think this in time can also cause a "check engine light".
You can get more dB by capping it off but I think this in time can also cause a "check engine light".
The Helmholtz doesn't do anything but reduce the sound/resonating. No CEL with or without it. ;-)
http://en.wikipedia.org/wiki/Helmholtz_resonance
I've done it on my car and the effect isn't very noticable but combined with a BMC filter and a replacement air pipe it's pretty noisy from 5000 rpm.
http://en.wikipedia.org/wiki/Helmholtz_resonance
I've done it on my car and the effect isn't very noticable but combined with a BMC filter and a replacement air pipe it's pretty noisy from 5000 rpm.
thirteeneast
New member
Yes as mentioned before its a canceling harmonic
If the Y piece is left in place it will still will cause a resonance
And yes the excess oil from your BMC filter could destroy your MAF sensor and if un-oiled a standard paper filter works better anyway..
Paper filters cost pennies, change them more often and throw them away, you can buy 5 for the cost of one K&N or BMC.
If the Y piece is left in place it will still will cause a resonance
And yes the excess oil from your BMC filter could destroy your MAF sensor and if un-oiled a standard paper filter works better anyway..
Paper filters cost pennies, change them more often and throw them away, you can buy 5 for the cost of one K&N or BMC.
] Oil spill on MAF is mostly a cone filter problem.
I think the BMC panel filters are pretty trouble free. The problem with the cone filters is that they are smaller, and much closer to the MAF. A bit too much oil, and it sticks to the hot film and stops it reading correctly.
The cone filters do give a louder induction sound. The power claims are baloney IMO.
If you take an X51 kit, it includes new heads, cams, valves, inlet manifold, exhaust manifold, loads of other bits and pieces, and a remap to the DME. The result? 20bhp.
If you take an X51 kit, it includes new heads, cams, valves, inlet manifold, exhaust manifold, loads of other bits and pieces, and a remap to the DME. The result? 20bhp.
chriscoates81
New member
And i bet it costs more than a k&n induction kit!
thirteeneast
New member
@Richard,
You may need to summarize with the Airplane & Conveyor belt conundrum again LOL.
You may need to summarize with the Airplane & Conveyor belt conundrum again LOL.
Just slightly. £7500 for the 3.4 and £6400 for the 3.6. That's just the kit - fitting is extra (over 30 hours IIRC).
996 The Essential Companion by Streather says
"It's a complete waste of time installing after market air filter assemblies on the standard full water cooled 3.4 and 3.6 M96 engines...the DMU decides how much air is going to be let in the engine, not the driver.....it might make a better induction noise, but that's about it"
"Note. The factory option X51 engine performance kits do not make any changes to the air cleaner assembly even though the entire air intake system is replaced"
I agree with the "if it ain't bust......"
"It's a complete waste of time installing after market air filter assemblies on the standard full water cooled 3.4 and 3.6 M96 engines...the DMU decides how much air is going to be let in the engine, not the driver.....it might make a better induction noise, but that's about it"
"Note. The factory option X51 engine performance kits do not make any changes to the air cleaner assembly even though the entire air intake system is replaced"
I agree with the "if it ain't bust......"
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