Thread: 390 H.P numbers?
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12-05-2010 01:35 PM #1
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390 H.P numbers?
Hey guys, I am just curious what my H.P gains are with this 390 I have built. Here are the specs.
68 Block
1969 428 CJ Intake
1969 428 CJ Water Pump
Mallorally Promaster Ignition Coil
Edelbrock 650 CFM Carb 4V
Ford 427 CJ Mechanical Cam
Any Ideas?
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12-05-2010 01:38 PM #2
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Forgot to add, I added 390 GT heads as well
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12-06-2010 08:18 AM #3
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so basiccally you have created a 428 cj type engine and by installing the smaller carb probably only killed off 50- 80 HP
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12-07-2010 11:13 PM #4
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Sweet. Since the 428 had 410 HP, and 450 with better headers, im probably close to 350HP since I have custom headers and a true dual exhaust with Flowmaster mufflers. Thanks
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12-08-2010 07:23 AM #5
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428 cj 335 hp
427 4v 410
427 8v 425
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12-08-2010 07:59 AM #6
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shoot the water pump is worth what? 1/2 hp?
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Thanks!! I usually do the "NZ Slang" lookup but decided to poke the bear this time! ;):D:p
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