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Affordable Oversized Valves

11K views 66 replies 10 participants last post by  tridentt150v 
#1 · (Edited)
Welcome to this week's edition of sourcing performance engine parts. This week we will be tackling oversized valves. So far I have talked to Ferrea, Kibblewhite, and Manley. Manley by far has the best pricing and lead times. They were also used successfully by @sweatmachine and @Thrux-ton-up as referenced here:

http://www.triumphrat.net/air-cooled-twins-technical-talk/78669-oversized-valves.html
http://www.triumphrat.net/club-cafe/44349-big-valves-installed.html

I am doing an 11:1 compression 904 kit, with 44mm Daytona TB's, 813 cams. My thoughts and my research tells me to do +2mm intake (33mm) and +1mm exhaust (27mm). If anyone has a spec sheet for valves they have had made, I would definitely appreciate you sharing. Also, if anyone would be willing to let me borrow a stock intake or exhaust valve, you would also be saving me some work. Also, if anyone wants to tell me why opening up the exhaust more or less is a good idea, please feel free to share your opinion.

A full set of valves is going to run about $400 as compared to the $640 other people want to charge. If anyone is interested in jumping in this with me. Pllllleeeaaaassssseeee email me at bsgrimes@gmail.com.

 
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