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Author Topic: actual opening degrees for cams on turbo busa  (Read 263 times)
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gyser1
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« on: September 17, 2009, 02:14:35 AM »

what should I set the intake open degress at & also the exhaust open degrees
I know 106/108 LC BUT starting from what degrees, have adjustable sprocket/peanut chain conversion
turbo busa with Wiseco pistons
Anybody have actual cc's for squish & pistons
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kawaking
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« Reply #1 on: September 17, 2009, 11:50:31 AM »

hmmm it does not work like that ! if I understood you correctly !  106/108 are in relation to TDC and then your cam profile determines opening and closing degrees !

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gyser1
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« Reply #2 on: September 17, 2009, 12:52:40 PM »

OK, lets start over.
To do the math & get a LC you need to know at what degree BTDC the Intake opens &&&& at what degree the Intake closes &&&& at what lift you take the measurements...
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Chris Horoho
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« Reply #3 on: September 17, 2009, 01:32:39 PM »

Use .05" lift
that will give you the #'s you need to calculate you cam timing
I would personally use 105/107 for your timing on a small to medium turbobike

there is good instructions on web camshafts site
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gyser1
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« Reply #4 on: September 17, 2009, 04:58:29 PM »

OK, lets start over.
To do the math & get a LC you need to know at what degree BTDC the Intake opens &&&& at what degree the Intake closes &&&& at what lift you take the measurements...

when CHECKING the degrees  YOU read a Number for opening THEN YOU read a number for closing add 180  divide by 2 and subtract the smaller number AND THEN YOU GET THE   LC
 
WHAT I am after is what rhe stock opening and closing angle are for both STOCK CAMS IN A 01 BUSA  anyone have those numbers?Huh??
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Chris Horoho
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« Reply #5 on: September 17, 2009, 05:07:37 PM »

not really ive had 2 cams not exactly the same when doing it
and you have to watch it cause sometimes you add on the exhaust side so id be careful
its more trial and error when i do them
usually takes about an hour for me to get them in
sorry i couldnt help with the numbers i usually pitch the sheet when im done with all my scribbles
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buzard
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« Reply #6 on: September 17, 2009, 07:15:02 PM »

http://www.webcamshafts.com/pages/degreeing.html
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