Titanium valves/springs/retainers in a 650R?


7 replies to this topic
  • XRMANU

Posted November 13, 2007 - 03:01 PM

#1

Does anybody have used them in a 650R?

Intake /exhaust valves + springs and retainers? Pro/cons?
Any good brands/dealers with good prices/services?

I would use them with a 680 kit and a stage 2 Hotcams,I have now Kibblewhite 1mm os intake valves and oem size Kibblewhites exhaust .

  • XRMANU

Posted November 14, 2007 - 03:31 AM

#2

:ride: anyone? :thumbsup:

  • crmc33

Posted November 14, 2007 - 04:58 AM

#3

Hi
Do you mean just Ti retianers with hi lift springs and black diamond valves? Or do you mean Ti valves?

I have used the former a lot on my 650L based racer with no problems

  • XRMANU

Posted November 15, 2007 - 03:52 AM

#4

I have back diamond valves in now but want the valvetrain as light as possible , I will lighten up the flywheel also so the 680 hc piston can rev as freely as the 650. Will put a Falicon rod in to be sure. :thumbsup:

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  • crmc33

Posted November 15, 2007 - 04:39 AM

#5

FYI
If you want Ti valves then it means new suitable valve seats too

  • bork

Posted November 17, 2007 - 06:04 AM

#6

I know less weight means less valve float on higher RPM. But what kind of RPMs vcan be safely hit on the 650? & the trade off is the Titanium wheres faster. I was going to do an engine back about 5 years ago, & put things in prossective & opted not to. Check with Rob@barnumspro.com & maybe he has done it & have input for you.

  • HeadTrauma

Posted November 17, 2007 - 10:42 AM

#7

FYI
If you want Ti valves then it means new suitable valve seats too


Yeah, usually ductile iron or beryllium bronze.

I really doubt the performance gain would be worth the cost and shortened life on anything but a maximum effort racer. Good swirl-polished stainless valves, stiffer springs, and Ti retainers will hold some high rpm and will last longer.

Ti valves alone will probably cost $120-150+ apiece, especially if they aren't a standard size already offered by a manufacturer AND if they are only sold in small lots.

  • weskc35k

Posted November 17, 2007 - 06:24 PM

#8

Yeah what's the point.





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