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Ordered Mach 4.5 injectors!

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Old 02-16-2007, 03:20 PM
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Ordered Mach 4.5 injectors!
Just got off the phone with Doug from PDW. I went with the 4.5's. Doug was very helpful. They are about 3 weeks out as Don is pretty busy right now. So in 3-4 weeks I should be pulling the DD-3's and installing the 4.5's! I expect the difference between the old extrude honed DD-3's and Mach's to be pretty big. I can't wait to get them in. There is a dyno event on March 21st, and if everything goes well I should have them in before that.
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Old 02-16-2007, 03:36 PM
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Congrats! on the injector purchase. I love mine.
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Old 02-16-2007, 04:08 PM
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whats the difference between the 4's and the 4.5's?
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Old 02-16-2007, 05:27 PM
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whats the difference between the 4's and the 4.5's?
About 25HP.
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Old 02-16-2007, 06:02 PM
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Any performance difs?
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Old 02-17-2007, 12:12 PM
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Any performance difs?
The dif between DD-3's and Mach 4.5's should be quite noticable.
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Old 02-17-2007, 12:22 PM
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are the DDs that inferior to the machs
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Old 02-17-2007, 01:20 PM
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DD-3 = extrude honed, ~110 Hp
Mach 4.5 = EDM technology, ~175 Hp
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