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930LDR 930LDR is offline
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Join Date: Dec 2004
Location: Danville - CA
Posts: 1,259
Bob -

I have the HFS on my 930 with B&B headers and have used both the stock and TiAL wastegates. My experience was that with the B&Bs the stock wastegate couldn't purge enough pressure to keep the boost where I wanted it. I ended up going with a .5 B spring in my TiAL and an electronic boost controller that enabled me to dial in the desired amount of boost. Worked a lot better for me.

I have a sneaking suspision that you could mate up the same turbo, header and wastegate modifications to any two 930s and find differing results (nothing on my car seems to behave the same as others)' so you may not have the same issues.

Can't speak to the differences between the K27S and HFS but man does my HFS pull hard thru redline! I can see where it may have a little less initial low end pull but what it does have is an extremely smooth and linear boost curve. Night and day from my original 7200.
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Rob Montgomery
'88 Blk/Blk 930 ('Lucy') - Not Stock & Not Running
Old 08-09-2007, 05:28 AM
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