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Originally Posted by NickP
Most people say the Euro / 540 HFM hits 5 volts before a decently set up Vortech puts out 11psi. I'm sure you can tune it to work with the HFM but it won't be optimal. But hey you're the one with the FI car - I say we go test it out 
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Ooops just noticed you already posted about 911TT hfm.
Anyway, I did test out my HFM but my car not exactly running perfectly as you may know.
Here they are, they were done in neutral though(don't know if it matters)
at idle 0.96v
4k rpms 2.28
6k 3.16
I also know a person that has a 430rwhp car on euro hfm.