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Old 03-30-2010, 05:22 PM   #1
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dual charged?

has anyone on here ever dual charged (super, and a turbo) a focus? ive seen it become more and more popular in england, using very small engines lik a 1.0 or a 1.2. it seems to work pretty well on the applications ive seen (audi, wv) im not trying to stir the pot, just curious...


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Old 03-30-2010, 06:21 PM   #2
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It has been attempted a few times. It ain't easy and it ain't cheap, that's for sure.
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Old 03-30-2010, 07:20 PM   #3
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and you don't wanna do it w/ a roots type blower. after the air is intercooled, the rotors will ust heat up the air agin
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Old 03-30-2010, 07:27 PM   #4
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Twin-charging with a centrifugal blower like the ProCharger sounds a bit odd. Pretty sure most people use a roots blower. If you have a roots blower with a heat exchanger like the Power Works, heat isn't as big of a problem.
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Old 03-30-2010, 07:47 PM   #5
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i'm thinking of going down this path..i already have the powerworks charger on my svt and i have a gt3071 internally gated turbo that i'm not currently using. i was wondering if the powerworks aftercooler would work well enough to run a small inline water to air from the turbo instead of having to plumb a bunch of air to air piping. i know that the gt3071 will come on boost at around 2500rpm and only running 7-10 psi will be really efficient and not heat the air much anyway. the is a guy on passionford doing this at the minute.http://passionford.com/forum/restora...3-03-10-a.html prepare to be blown away by the amount of money spent by this guy.........
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Old 03-30-2010, 07:55 PM   #6
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2500rpm is a little soon for a gt3071 to spool. Also, 7 - 10psi is waaay out of the efficiency range of that turbo. I think you're confusing efficiency with effort. A gt3071 doesn't have to *work* hard to push 10psi but it's probably only ~55% efficient at that boost level. At 20 - 25psi it really comes alive and moves more into 70%+ efficiency.
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Old 03-30-2010, 07:59 PM   #7
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nice
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Old 03-30-2010, 08:16 PM   #8
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if you look at the map..efficiency at 35lbs at 1.75 pressure ratio is well over 70%. this same turbo on my gtir was hitting full boost 2.2bar or 3.2 pressure ratio by 3800 rpm and i had no variable can timing to bring it on sooner. anyways i think i might give it a go once i get the clutch and diif installed.
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Old 03-30-2010, 08:21 PM   #9
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Hmmm...I guess I was thinking more of a gt35. Even so, 10psi is not using the full potential of a gt3071 but it does make more sense when twin-charging.
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Old 03-30-2010, 08:39 PM   #10
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i got bashed for tossing the idea out there with doing it with my pwsc...
and posted the thread of Williams build.

you know what would even be more badass?


a twinscroll gt30 with a pwsc.

it would be instaboost at 1k. haha
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