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Message: <blockquote data-quote="chris2000" data-source="post: 1393904" data-attributes="member: 11855">hi guys,let me chip in my views..As far as i remember, B16A and B16B throttle are 60mm and ITR are 62mm.On my B18C with cams, i tried 60mm EG then upgrade to ITR 62mm and you will feel the difference especially in top end. The I changed to Spoon throttle and again there was difference! Last year MME regulation changed and only allow 60mm throttle and stock air box. So we change open pod and Spoon throttle to std air box and std B16B 60mm throttle and we loss 1.5 seconds a lap in SIC!!Then last year A1 support race, i borrowed and tried a big straight through 70mm throttle with 70mm butterfly and i can tell you it definitely cannot match with B16A, B16B and B18C engine. Idling was very bad, low to mid range was lumpy and top end was strong but not responsive. But the guy i borrowed the 70mm throttle had a B20B bottom end and its effect is much better than my B18c.So my experience tells me, bigger is definitely better but TOO big screws everthing else up just like my camshaft testing!I feel it is the whole package, the matching of the right components for the right usage. Just my 2 cents... :)</blockquote>

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