Who is running a silicon intake with engine cover?

[alexeiwoody]

For the guys running the kobe sfb and inlet, what did you use to join the two together?

Does one slide over the other? The SFB should JUST fit into the turbo inlet pipe.

[Caution]

I got a metal coupler that slid inside the two when I got the Kobe sfb/inlet.
http://i.imgur.com/FdMWwSl.jpg

[kiwigene]

I got a metal coupler that slid inside the two when I got the Kobe sfb/inlet.
http://i.imgur.com/FdMWwSl.jpg

Same here. Should come supplied if you buy the two together. Contact Jack, I'm sure he'll sort you out.

[alexeiwoody]

I got a metal coupler that slid inside the two when I got the Kobe sfb/inlet.
http://i.imgur.com/FdMWwSl.jpg

Same here. Should come supplied if you buy the two together. Contact Jack, I'm sure he'll sort you out.

This might sound silly, but it's better not to use the coupler if the two pipes fit over each other snug.

Even though AVO (or whoever AVO copied) originally designed the coupler for the pipes, going coupler-less works better in terms of air flow (less restriction/crap in the way).

We've fitted the Kobe pipes to a friends WRX and it worked great there.

[kiwigene]

I got a metal coupler that slid inside the two when I got the Kobe sfb/inlet.
http://i.imgur.com/FdMWwSl.jpg

Same here. Should come supplied if you buy the two together. Contact Jack, I'm sure he'll sort you out.

This might sound silly, but it's better not to use the coupler if the two pipes fit over each other snug.

Even though AVO (or whoever AVO copied) originally designed the coupler for the pipes, going coupler-less works better in terms of air flow (less restriction/crap in the way).

We've fitted the Kobe pipes to a friends WRX and it worked great there.

I'm guessing that was the original idea since the SFB goes from ~75mm down to ~65mm - so it can fit inside the main inlet, which goes from ~75mm down to ~55mm(?).
But I guess people were finding the two pieces didn't always stay joined together(?) You can't use hose clamps as it would just crush and deform the silicone.
I don't think the smooth metal coupler between SFB and main inlet would make much difference to air flow given the main restriction is determined by the turbo inlet diameter.
The other option for the manufacturers would have been to make the SFB a constant 75mm and provide and straight (non-stepped) coupler.

[HardwareBoB]

I'm guessing that was the original idea since the SFB goes from ~75mm down to ~65mm - so it can fit inside the main inlet, which goes from ~75mm down to ~55mm(?).
But I guess people were finding the two pieces didn't always stay joined together(?) You can't use hose clamps as it would just crush and deform the silicone.
I don't think the smooth metal coupler between SFB and main inlet would make much difference to air flow given the main restriction is determined by the turbo inlet diameter.
The other option for the manufacturers would have been to make the SFB a constant 75mm and provide and straight (non-stepped) coupler.

Sure you can - just cut the coupler down so it's only the small section and put the hoseclamp around the whole thing.

[alexeiwoody]

I'm guessing that was the original idea since the SFB goes from ~75mm down to ~65mm - so it can fit inside the main inlet, which goes from ~75mm down to ~55mm(?).
But I guess people were finding the two pieces didn't always stay joined together(?) You can't use hose clamps as it would just crush and deform the silicone.
I don't think the smooth metal coupler between SFB and main inlet would make much difference to air flow given the main restriction is determined by the turbo inlet diameter.
The other option for the manufacturers would have been to make the SFB a constant 75mm and provide and straight (non-stepped) coupler.

The problem is - the coupler connection isn't smooth. If the Kobe is anything like the AVO coupler, there is a gap between the metal and the silicone on the smaller side. This is where turbulence comes into play, regardless of the pipe diameters involved (and while we're on that point, the main restriction is not the turbo inlet diameter!).

If you have the stock turbo, I'm sure no-one really cares, but on a proper turbo and a good big MAF intake, it would be something to get rid of pronto.