Quote:
Originally Posted by wang970305
okay.. i think I see now.. I don't feel confidence to port the IM opening myself and not a fan of the RTV seal..I think ima just stick with 87mm opening
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Joshinator explained it well for WOT. The other point I was trying to make in an earlier post is, if we take half throttle for example. The 95mm will let more air flow in at half throttle than the 87mm
The area of a circle is pi*r^2 (gives us the opening of throttle body, ignoring the blade for simplicity)
95mm TB area: 7088mm^2 --> Half throttle = 3544mm^2
87mm TB area: 5944mm^2 --> Half throttle = 2972mm^2
At half throttle, if we're assuming half the area of the circle to be open, the 95mm TB has about 20% more of an opening. The same concept would apply for 1/4 throttle, 3/4 throttle, etc. Which would explain why you get a throttle response benefit during everyday driving
I'm also worried about porting the LT2 on my own so I did the same thing as you, left the IM unported and got the 95mm TB. And maybe pay to have someone port it in the future