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Author Topic: Oppy twin,  (Read 3360 times)

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Offline rene knoll

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Oppy twin,
« on: December 06, 2015, 04:03:29 pm »
Has anybody put bigger valves in oppy twin and if did what you us e
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Offline PJG56

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Re: Oppy twin,
« Reply #1 on: December 06, 2015, 05:19:34 pm »
My opinion they don't need bigger valves
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Paul Guptill  (oppy) #238modX
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Offline DeereRacer

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Re: Oppy twin,
« Reply #2 on: December 07, 2015, 11:15:34 pm »
Whats the displace ment of your oppy? If it was 50ci would it then need bigger valves?
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Offline PJG56

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Re: Oppy twin,
« Reply #3 on: December 08, 2015, 03:34:18 am »
I've done quite a bit of flow bench work with an oppy block,with a properly ported block,undercut stock valves,some valve seat work and a few other little things the oppy block flows quite well (more than a lot of vtwins I've seen)
P.S. it's in the 3 digits
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Paul Guptill  (oppy) #238modX
2012 slmra mowstock champion(builder/owner)

2013 slmra mowdified champion(builder/owner)
2013 ARMA national champion Mod-X(builder/owner)
2014 ARMA national champion Mod-X(builder/owner)
2014 All American Champion Mod-X/CP(builder/owner)
2014All American Champion FXT (engine builder)
2014 All American 2nd place SP(builder/owner)
2015 All American 2nd place BP (builder/owner)
2016 OutlawTriple Crown FXT Champion (engine builder)
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