Aimed at Ash mainly but he's not a paid member so ..

On the BTCC throttle bodies, have they only been ported pre-butterfly? Going off tobeski's thread here it seems like it's only the area around the IAT sensor that has been machined, hence losing the progressive first 1/3 of throttle control.

Considering getting the dremel out on a spare body. Spending that much time redesigning the inlet setup I figured it might be worth a few hours of grinding. Anything to reduce turbulence, right?

Also Mei, didn't you get one off someone a few years ago?

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Bye bye Sundance Kid

Agreed, its the diameters of the runners on the plenum and the valve throat area that are the biggest restrictions. Forget doing anything like that with a dremel though, you need a long series industrial die grinder or serious motor and a flexishaft whith a 2omm allicut burr on the end of it to be able to do the job in a sensible timeframe. Either that or slice the manifold in half which you have to do to get at it al properly anyway. But unless you have all the cams, valves, exhaust etc. uprated to match it won't help you anyway.

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars

You could say that

Its worth noting that any mods done to create more airflow will actually loose you power unless accompanied by a remap as the car will run leaner and make less power.

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars

Does your new air intake setup work well then? better than standard? I only ask because frankly it just looks laughable!

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''Oh, it does handle like a golf!'' Why drive a Golf....when you can drive a GTi-6?

When doing these sort of mods the biggest difference I think you feel is in the pick up on low revs. Will look at doing this on my 6 at some point but probably won't have the time or the tools to remove that much material. I did port a few 205 gti TB's with again the same differences in pick up.

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306 GTI-6
205 GTI-6 Project
205 1.6 GTI - RIP
205 1.9 TT - RIP
E39 535i - Daily driver
*Newest edition* E60 M5 5l v10 - The weekend car

Wait, having had a look at it today, I see why "throttle response is improved"... there's a stepped bit blocking half the butterfly up to 1/3 throttle, throttle response must only feel better as that progressive restriction is removed and more air gets in at part throttle. Doesn't make any difference at WOT from what I see.

Oh well.

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Bye bye Sundance Kid