installed new air intake/filter

[bull8042]

Originally Posted by denisjolicoeur

Has anyone ever thought of using the stock box (with a K&N as mentioned above, and maybe the scoop too) with just different piping from the box to the TB? This would eliminate the 2 resonance chambers and would result in the air getting to the engine quicker (and cooler).. wouldn't it?

Yeah, I am thinking this as well. I guess this is one of those things that is worth waiting on until more guinea pigs provide us with some real-world results.

[GHammerly]

Any one thought about testing bolt on parts with data log tools like DL1 or MaxQ Data istead of dynamometers or 1/4 mile times?
I use MaxQ Data for login autocross runs, it's also a good tool for comparing acceleration runs.

[bull8042]

Originally Posted by whalepirot

That's marketing hype. A clean K&N flows no or marginally 'better' than a clean, stock filter. Also, the minimal particle size allowed through is larger than the paper.

Threads on this subject abound on every car forum concerned with performance.

So based on that, the above mod is a total waste because it is now pulling in hot air vs the cool air from the factory intake position without any benefit of a lower-restriction filter.

[16d @ 4]

So, is there a K&N performance air filter for our Smarts Yet?

[WilyB]

Originally Posted by DavidV

For me, the single biggest selling point is not the peak horsepower number anyway, but the vastly improved throttle response and corresponding reduction in transmission lag.

A dyno graph would be cool.

[arturo.vega]

This is the air filter available from K&N four our smarts (from 1997 to 2008)



E-9257 Product Specifications
Product Style: Round Air Filter
Height: 5.5 in (140 mm)
Inner Wire: No
Inside Diameter: 2 in (51 mm)
Outside Diameter: 3.5 in (89 mm)
Top Style: Open
Top Material/Finish: None
Filter Re-Oiling Amount: 0.63 oz (19 ml)
Weight: 0.6 lb (0.3 kg)
Product Box Length: 7.19 in (183 mm)
Product Box Width: 4.63 in (117 mm)
Product Box Height: 4.69 in (119 mm)

E-9257 - K&N Replacement Filters, Replacement Air Filter

[jwight]

Arturo, we've seen that but our US (and Canadian) 451s have a flat filter. I suspect yours do also.

[doctorcjo]

If anybody in houston knows someone with a dyno, I'll put my car on it. I have done no other mods, have 4k miles on the car and this intake/filter has made a noticeable difference in power, seems to shift quicker and rpms accelerate faster. The sound is awesome as well. My breathless exhaust and scoop are on the way.

[Dunerunner]

Originally Posted by lowndex

Is it me, or does it look like a fabricated air box could be made to house the K&N and connect to the Cold Air Port to the left. It also looks like that access to the Cold Air Port could be increased in diameter allowing more air flow.

[arturo.vega]

Originally Posted by jwight

Arturo, we've seen that but our US (and Canadian) 451s have a flat filter. I suspect yours do also.

What was I thinking?? You are right jwight, as long as I'm used to this filter I missed that (also the K&N says it fits 2008 fortwo but that's WRONG).

I used this K&N filter in a 2005 fortwo and a BRABUS filter in the roadster.

please accept my apologies