38mm vs 46mm throttle body - Kawasaki Teryx Forums: Kawasaki UTV Teryx Forum
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post #1 of 3 (permalink) Old 05-09-2010, 08:55 PM Thread Starter
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38mm vs 46mm throttle body

Hey guys getting ready to pull the trigger on some throttle bodys just dont know which to get, i got a 09 840 dasa cnc heads with plus size valves, all i really do is glamis 99%. Ive heard if you go to big you lose bottom end, dont know if this is true. Thanks for the info
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post #2 of 3 (permalink) Old 05-09-2010, 09:35 PM
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Originally Posted by FASTDMAX View Post
Hey guys getting ready to pull the trigger on some throttle bodys just dont know which to get, i got a 09 840 dasa cnc heads with plus size valves, all i really do is glamis 99%. Ive heard if you go to big you lose bottom end, dont know if this is true. Thanks for the info
You would need to weld a bigger flang on the heads and report the port to match.
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post #3 of 3 (permalink) Old 05-10-2010, 07:58 AM
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Same info i posted on the other site a couple days ago .....

I have tested 38mm and 39mm throttle bodies. They both made the same peak HP and the 38mm were smoother. This was on a hi compression 840 with ported heads, +1 1/2 valves and a prototype open intake. IMO if you do not have new spiquets welded on the heads you will make more HP with the 38mm throttle bodies. PM me i have 38MM throttle bodies instock and ready to roll.

DASA RACING WORLD CHAMPIONSHIP WINNING MOTORS AND SERVICE
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