badabing

fellas,

i recently changed the stock airbox and filter in my 1996 993TT w/29K miles to a K & N filter and a weltmeister performance airbox as shown in the link below.

http://www.automotion.com/productpag...1260#partStart


anyway, now i am getting a strange noise usually during moderate acceleration between 3,000 and 4,000 rpm. it sounds like a drawn out honking. i also get it sometimes when maintaining constant speed in 5th or 6th gear around 2,000 RPM. is this normal? is this the sound everyone is raving about?

btw, i also still have the factory original turbo bypass valves....

any advice?

WHB Porsche

On certain aftermarket airboxes, the air filter can collapse due to the lack of a front cover. Check to make sure everything is in the right place.

badabing

just checked, it's in the proper position.....

WHB Porsche

Check out these two threads:
https://rennlist.com/forums/964-forum/306588-fabspeed-cup-style-airbox-warning.html
https://rennlist.com/forums/showthre...ghlight=airbox

I know you don't have the Fabspeed, but the Weltmeister looks like the same thing. What happens during hard acceleration?

AOW162435

While many have had great luck with K&N filters for other applications (including me), I think the general consensus here is that the stock filter and housing is perfectly fine.

Andreas

95GPW993

Being on a budget, I bought a stock airbox lid for my 993 from an eBay seller, then used a Dremel with a cutting wheel to make it like the Supercup lid. Basically, it's just an open frame to hold the air filter and clutch vent tube in place. I use it when the weather's fair (i.e. no rain) with the standard air filter. No real gain in HP, but it sounds very nice at wide open throttle.

badabing

not sure, i'll give it a try........i'll post the results, after i wipe the grin off of my face that is

Marlon

Concur - anybody want to buy a gently used K&N filter??? cheep...