Sometime this summer I'll be past the development stages of the big valve Busa head and have one for testing.
Whats a whammer jammer software#
I havent dynoed a big valve 12r of any displcement yet, so I,m just going by seeing what software simulation trends are on the 12r and busa engines. On the other hand those those big valves hinder power on valve closing at low rpms due to the reduced velocities and the reversion effect.īut for a drag engine or especially a top end run bike for the texas mile or bonneville thats not a concern. It aids power at higher rpms the quicker you drop the port pressure. The 12r's valves are larger than a busas even thou the engine is 100cc smaller.
![whats a whammer jammer whats a whammer jammer](https://i.ytimg.com/vi/siFJ9QIyp6c/hqdefault.jpg)
On a big cc engine at high rpms, bigger valves would depressurize the port quicker, no? Yea I would agree Doug on a stock 1199 cc engine.īut I would think 1375 or bigger engine spinning at 13k-15k could make use of bigger valves. There is quite a bit to be gained however, from doing a precision 5 angle valve job and bowl port to make maximum use of the valves you have. It's not the same in 4 valve setups where you've already got a huge amount of valve area per bore size. The whole idea of "big valves" being a easy route to power is a hold over from two valve engines where increased valve area and good flow at low lifts was really tough to come by. I am familiar with others who tried oversize valves on the 12 and also saw no appreciable improvement. I personally tried big valves on the 10 and 11 and saw no improvement. Generally speaking, Kawasaki is amazingly good a designing their engine combos, especially in this area. I did not work on the Muzzy prostock bike.īut, that is "info gleaned" from pretty direct knowlege of quite a bit of R&D on the 10, 11, 12 and other Kawaskis.
Whats a whammer jammer pro#
Waste of time.ĭoug was that some info gleaned from tuning the Pro Stock 12R? Oversize valves will not result in more power on a 12. How did you get valves from kibblewhite, they dont sell to the public? I think Y2k said that the stock valves ( intake )would not become a restriction until like 14,000 rpms. seems that its hard to get good exhaust flow out of the stock head from what Iv'e read from other posts. The stock 33.4 mm valves are larger than the busas. This moderator uses moderation in moderation
![whats a whammer jammer whats a whammer jammer](https://static.wixstatic.com/media/266c26_b1b861f03ebd4932a0d3c6f137e743eb~mv2.jpg)
You doing oversized exh valves and not oversized intakes?
![whats a whammer jammer whats a whammer jammer](https://i.ytimg.com/vi/CBG01ZX6pyc/hqdefault.jpg)
Kibblewhite is where i get all my valve stuff (except fine shims). Since i'm down might as well do it right. Does anybody know who manufacturers these vavles. Someone posted on here that they netted 9RWHP with the intake cam on the exhaust side and 1mm oversize exhaust valves.Can't seem to find the post again.