Throttle body, hose diameter..??

Victor Meldrew · Post by **Victor Meldrew** » Sat Feb 17, 2007 6:40 am

I dont like the set up weve both got just now, the filter clamping onto the hose without having a solid tube underneath....(or maybe you do have one, obviously cant see it...) had my filter drop off before, not ideal.

dr al · Post by **dr al** » Sat Feb 17, 2007 10:45 pm

yep, i see what you mean. - i reckon that the internal diameter of my silcone tube is quite reduced by being clamped too!

mine's pretty secure, though. - i reckon it'd take a lot to shake it loose!

If you do find something to go inside (like a v thin ring of aluminium tube or something) give me a shout. - it'd be a worthwhile upgrade!

A.

robin · Post by **robin** » Sun Feb 18, 2007 10:30 am

It *won't* be heat soak into the airflow. It will be heatsoak into the engine itself. As cylinder temperatures rise, power drops off. Peak power comes when the engine is warm but not hot. If your car behaved differently from the others it may be worth an oil change and checking that the cooling system is working properly (no obstructions in the radiator, no air locks).

Air is too good an insulator and the flow through the pipe is way too fast to achieve a 6C rise in intake temp (required to get a 2% loss in power at an ambient of 15C = 288K). Whilst you could maybe persuade the outer layer of air to heat up, it would never conduct through to the inner layers in time to have any effect.

Cheers
Robin

*edit* BTW, turbo cars will suffer a different problem due to the extreme rise in temperature of the turbo with the exhaust gasses; that's why they have intercoolers and so on; not an issue on a normally aspirated K.