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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Not an expert but here is my two cents.

K27-7200 comes in very fast and hard and will work well up to 400hp on an efi 3.0 motor and could be a good fit. A K27-7006 has a larger hot side for less back pressure and more HP on the track. Do not know if there are any more new ones out there for sale. They come on boost a about 300rpm later I suspect but with EFI and some compression that may not be an issue. The GT-35 might be worth looking at.

Pre boost response is a combination of tune, motor size and compression. 8/1 makes for good low end response.

However, unless you have a very efficient turbo/inter-cooler, run race fuel, have fire rings cut into your heads and cylinders running 1 bar might be close to being over the edge.

JE turbo pistons are your best way to get compression. However, with you stock compression you could go to 1.1 bar.

With a 3.0 you can run a higher rpm safely and might consider a cam that will support 7k rpm. With the right build (programmable boost level by rpm) you could have a very wide flat power band.

As an option you could have your cylinders bored out and re-plated bumping you to a 3.2.

If you are truly going to go the way you say, it might actually be better to sell the 3.0T and start with a stock 3.2 Carrera motor as it already has great turbo cams, is a larger motor, has a great intake manifold already fit to the heads. Also, it has a very usable distributor that with EFI and MSD could make for a solid ignition for a bunch less tha distributor less system, .
Old 10-22-2009, 07:23 PM
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