Cam replacements - Page 5 - Honda Valkyrie F6C Forum
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post #41 of 44 (permalink) Old 11-02-2015, 04:38 PM
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Nitrous would probably be the easiest method, although I personally have always been a little hesitant to use it.

I've seen way more engines comes apart being bottle fed than with turbo/supercharging. I'm sure with today's technology though it's relatively safe.



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post #42 of 44 (permalink) Old 11-03-2015, 12:22 AM
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A dry nitrous shot against the inlet air temp sensor should cause the ecu to give a rich mixture so as not to hole a piston.
Could be good for 15-20 hp boost.

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post #43 of 44 (permalink) Old 03-29-2020, 12:40 AM
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Quote:
Originally Posted by goldstar903 View Post
The 2014 Valk has a 205 degree duration in both the intake and exhaust cams.
For those that may not be familiar with cam timing and duration:

Intake Cam:
opens at 5 degrees ATDC (at 1mm lift)
closes at 30 degrees ABDC (at 1mm lift)
Duration: 205 degrees

Exhaust Cam:
opens at 30 degrees BBDC (at 1mm lift)
closes at 5 degrees BTDC (at 1mm lift)
Duration: 205 degrees

AT= after top
AB= after bottom
BB= before bottom
BT= before top
DC= dead center

Correct me if I am wrong but, an increased duration cam will peak the HP at a much higher rpm and you will lose the low rpm torque. Not to mention the limitation of valve to piston crown clearance that has already been addressed.[IMG class=inlineimg]/forum/images/smilies/tango_face_surprise.png[/IMG]

Hello My Friend
I'm looking all around for the standard measurements on the Valkyrie 1520cc camshaft specs.
You are the only person I could find providing it.
Question:
Where or how did you get this values?
I believe there is a small mistake as: 5+180+30=215 and not 205 degrees. Can you help me with the proper measure or resource? I have the cams with the heads out of the Bike and is not easy to measure without the crank.
Thank you in advance
Guz

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post #44 of 44 (permalink) Old 03-31-2020, 10:01 PM
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Thumbs up Valkyrie Camshaft Measurement

I did some measurements, of course, the duration must be taken on the crank to get BTDC and ABDC intake and vice/versa for exhaust, but what was important right now was total duration, so I can compare with Aftermarket performance ones.
This is what I got:

Intake valve OD: 33mm
Exhaust OD: 28mm
Camshaft lift, Int and Exh: 5mm
Valve lift (remember that rocker-arms have multiplication): 7mm
Total duration @ 0.050" (no-crank) 190 degrees.
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