Port and polishing a 4.7l throttle body
 

I have a 2006 Ram with the 4.7L.. Im wanting to port and polish my throttle body. Will this show any difference in performance or throttle responce on this engine? My friend has an 06 chevy with the 4.8L v8 and he ported and polished his tb and he said he could tell a big difference afterwards. I know one thing, he has a poweraid tb spacer and you can hear it whistling pretty loud when he leaves out down the road, so it has to be getting alot more air. i have one installed behind my tb too and the whistle is not near as loud. we both have k&n CAIs.. If you've done this before on your 4.7L let me know how it turned out and if you have pics post them so i can check em out.

What do you mean by port and polish. Is that the same as cleaning the throttle body.

No

And yes a lot of guys say great things about doing this

there is a guy that runs a business doing it

thefastman.com

Are oyu going to do this yourself, I would like to know more if you do. I about the concept, I dont think Ive ever heard of anybody doing it though.

You will definately notice a difference. This is an excellent mod for both the 4.7 and the hemi.

For those not feeling up to the task, contact Dan Arcand at thefastman.com He does great work at very reasonable prices.

Froggy, how would you go about doing this? What does are necessary for completing this task?

Im becoming intrigued... i want to know more. a little sand paper? lol

Ok they are $180 plus $80 core and $10 shipping.

I understand that when he sends you the TB that it is ported which would clean out any gunk left, but I really would just rather have my own done. I'm sure this is a question for him though.

I wonder if it is that great of a mod? I do get that more air=more combustion and if your CAI is restricted by a small TB then it is useless, but does anyone have an REAL results? $180 is pretty cheap for the possible gains

Here is the link to the fastman. http://www.thefastman.com/ Select your engine size. There is a lot of info on there of what he does. The short of it is that he cleans them out, bores out the centers to a true 68MM or what you want. He then puts in new butterflys to fit the new bores. In the big picture $190 (that has shipping included) is a hell of a deal for a TB.

It's a little more complicated than just getting some sand paper to do it right. I had mine done by Dan Arcand. He opens up the frontside bore to 85 mm and tapers it down to the butterfly. He knife edges the throttle blade and converts the shaft into a half shaft. You could probably sand up the bore easy enough, but converting the shaft is pretty much imposible as a DIY. Even knife edging the blade can be tricky.

Into a 'half shaft'? What does this do? Does this mean that when at WOT, the butterfly is smooth with no hump?

Thats not a bad deal for the guy to do it but i think im about to tackle it myself. I messed around with it last night and used a metal deburr bit and shaved a small amount off, especially closer to the butterfly flap, just to see how it would do. i cleaned all the shavings off and put it back on and noticed the whistle from the tb spacer did get louder. Usually the whistle started around 1500 rpms when taking off now it starts around 900 to 1000.. i fixing to purchased a port and polishing kit from summit racing so i can get it all done at the same time. it comes with the grinding bits and some cross hactched polishing brush bits. i think the kit cost a little over 30 bucks. and they fit any dremel or burr grinder.

Polishing The TB
 

badblackram06 this is worth the time. I did do it to my 06. If you look at the inside of the TB you will notice just inside the flap its actually smaller in in the center which of course will restrict flow, almost a ridge. Remove the TB and remove the flap. Clamp to a solid surface and you will have all the access you need to do this. If you do it right it should be level and smooth all the way thru. Mark the flap area on the inside of the TB first before you begin and stay away from that area, you can ruin it if you grind that area, besides its the largest area of the TB so you don't need to shave that area, from the shutter to the front is what your gunning for. Take your time. Took me about 2- hours. I did notice the difference in the acceleration. GOOD LUCK.

3yr old thread, but thanks for the input.