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Siamese Runners

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Old 11-07-2001, 02:08 PM
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Siamese Runners

I was readin a post the other day, and someone said that the SLP siamese runners, or any bigger sunners will actually lose horsepower on a 305, is this true?
Old 11-07-2001, 02:46 PM
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I wouldn't say lose horsepower really.. they may gain power up top, but lose torque down low. The tpi was designed for a 305, so the runners are fine until you do some heavy mods.
Old 11-07-2001, 03:23 PM
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Car: 1968 Camaro
Engine: 406
Transmission: Tremec TKO
Axle/Gears: 3.42
If you lose TQ, you loose HP.

HP=(rpm x TQ)/5252
Old 11-08-2001, 02:44 AM
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Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
The deal is that the siamesed runners (or any other larger runners) may indeed drop the peak hp figures a bit, but will broaden the power band - especially on the top end with the siamesed runners as they shorten the intake runner slightly which basically raises and flattens the power output curve.

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