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Landracing Forum Home > Tech Information > Technical Discussion (Moderator: Seldom Seen Slim) > exhaust ??
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Author Topic: exhaust ??  (Read 620 times)
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fredvance
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« on: July 20, 2010, 04:58:22 PM »
Header #1 has 1 3/4" primary tubes total length of haed pipes and straight collector is 45". Header #2 has 1 7/8" primary tubes the collector is a narrow taper megaphone. If I make the total length the same on #2 as on #1  will my HP range be about the same? Lower? Higher or what.

  Fred
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WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
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« Reply #1 on: July 20, 2010, 06:43:07 PM »
are these on the same vehicle?  grin
kent
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fredvance
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« Reply #2 on: July 20, 2010, 06:47:49 PM »
same bike different motor. grin A little more compression, same cams and head.
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WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
Vance&Forstall Racing
All 9 SCTA 1350 NA records
WOS 2011 235+MPH
Engine by Knecum, Tuned by Johnny Cheese.
Sponsers Catalyst Composites, Johnny Cheese Perf, Knecum Racing Engines, Murray Headers, Carpenter Racing
V8Pinto
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« Reply #3 on: July 20, 2010, 06:48:50 PM »
Fred is your bike still at Suicycle?
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Shane
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« Reply #4 on: July 20, 2010, 07:06:09 PM »
more info.... displacement? cam lobe centers?
kent
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fredvance
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« Reply #5 on: July 20, 2010, 07:43:30 PM »
1350, 110-112
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WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
Vance&Forstall Racing
All 9 SCTA 1350 NA records
WOS 2011 235+MPH
Engine by Knecum, Tuned by Johnny Cheese.
Sponsers Catalyst Composites, Johnny Cheese Perf, Knecum Racing Engines, Murray Headers, Carpenter Racing
fredvance
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« Reply #6 on: July 20, 2010, 07:44:50 PM »
Shane, same bike. It has been too good to me to even think about anything else.

  Fred
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WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
Vance&Forstall Racing
All 9 SCTA 1350 NA records
WOS 2011 235+MPH
Engine by Knecum, Tuned by Johnny Cheese.
Sponsers Catalyst Composites, Johnny Cheese Perf, Knecum Racing Engines, Murray Headers, Carpenter Racing
1212FBGS
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« Reply #7 on: July 20, 2010, 09:18:02 PM »
fred i take it 110 on the intake....pretty tight numbers.... i would stay with the smaller pipe...
kent
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