Another TB question. New ? tho

[david-b]

Hey all,
So I was looking at the TB the other day and looking at the flapper more specifically. When the flapper is open at 100%, the flapper is thick. Would taking it and sanding it down thinner or making the edges more pointy help in air flow?

Also, the bar in the middle is thick as all hell. I understand that where the bolts that hold the flapper are, there is nothing you can do. But wouldn't it make sense that sanding/grinding that also would help air flow? Here you have air flying in really fast, and then it gets stopped by these large masses right in the middle of where the air is trying to flow freely. Any ideas?


Yeah that's right... I'm trying to milk out as much power as possible.

[gthompson97]

Sanding/thinning down the throttle plate might help with airflow a little, but I don't think you'd get any real gains out of it, the same goes with the rotating bar in the center.

[david-b]

I know there will be no major gain. It's nothing really... just a little better flow. I think I'm going to do this. I'm finally going to be sending my spare in to get ported, so I can mess with this one.

[gthompson97]

Well with that being said then I would try anything you can imagine, maybe even get a huge ass drill bit and just bore the hell out of it yourself

[kjewer1]

A couple things come to mind when I think of this. One, the edge of the plate is precision machined to seal against the bore when closed. I wouldn't do anything that would interfere with this seal, which rules out sanding/grinding down the edges. I would also be hesitant to do anything to the shaft, since a broken shaft can ruin a motor in a heartbeat. Just search any national dsm forum for acufab throttle bodies and you'll find plenty of examples One of the main benefits to a stock TB, and the reason I ran a NT TB rather than an aftermarket unit, is the fact that they are very robust. Also consider that poeple run 8s and 9s on stock units, so your gains are not likely to be perceivable, why take the risk with the structural integrity or sealing qualities? That's just my thoughts on the subject however, I've never tried any of this.

[david-b]

That middle shaft is very large though. I think, if done right, I should be able to take out some material without having any structure lose. Any other input? thanks guys.