Throttle body need adjustment?

I got all three of mine at 630. Took a while but I thought it would greatly improve smoothness. I did it at the same time as fitting the ram air, so I have noticed a difference. They were 600 to 650 before, so am I right in thinking the the improvement was only from the ram air, cos boy it's good.
( Yes, post is some time ago (.) but it just came along by change.) Question : at what rpm did you set the adjustment of the throttles ?
 
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