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Old 03-26-2006, 04:56   #1 (permalink)
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PACEMAKER 4070 Vs 4080

Has Or Does Anyone Know The Power Diference Between These Two Extractors If Running A 378c With 248@50" Cam And 2v Heads That Flow 560hp. I Know One Is 1 3/4 And The Other 1 7/8.
Im Also Running A Twin 3" Exhaust.
What Do The Guys With 3v Heads Run., And What Does Everyone Else Run On Their Tough Clevos. Cheers
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Old 03-26-2006, 17:51   #2 (permalink)
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Re: PACEMAKER 4070 Vs 4080

At the crank it'll be around 10-30hp gain if the engine needs the bigger pipes. If it don't need it? You'll go backwards. My current setup looses around 25-30 crank hp with the smaller pipes.
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Old 03-26-2006, 23:25   #3 (permalink)
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Re: PACEMAKER 4070 Vs 4080

With that combo, you will probably make more torque with the smaller pipes, but depends what you're doing i spose.
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