Does anyone have any advice on how to port a throttlebody at home with a dremmel tool. What bits or attachment do i need to do this. Also haow much do i need to trim off????Any info will be gladly appreciated......

 

My advise would be dont do it. There is not much if anything to be gained from this.

 

A **** load of sanding wheels, maybe an extra drum.

 

A grinder bit for non-ferrous metals. a standard steel cutting bit will clog up and become useless unless you chip it all out every 30 seconds. If you keep oil on your cutting bits they clog as fast. Sand rolls to clean it up. Do a search on here and you will find a lot of info. Just don't get mess with the actual area near the throttle blade. It can cause idling issues and you will throw it in the trash.

 

I just used the carbide cutter bits. Then some course sand paper bits and then some fine sandpaper by hand. I then used the dremel to polish it all up. Its easy and plenty of guys have dyno sheets showing a gain. Of course a gain that small could easily be "doctored up".

 

....WAY too much chance for you to screw up a $400+ TB IMO

 

grab one off of ebay or from a salvage for cheap and go for it. if nothing else you would at least get some experience at it. if ya screw it up and grind too much material away, just epoxy it back up and start grinding again. here is a first attempt for me. after this pic i went ahead and filled in the ported CCV and smoothed it out. didn't have any idle issues whatsoever. only issue i had on this one was the throttle being a little touchy while it was on cruise control. this was because i took out just a touch too much material on the bottom up close to the blade and epoxy can fix that.

 

Watch for updates in this how to thread here sometime this week. I've now done 4 Silverado DBW TB's without issue, and hundreds of TB's in the past 6 years and never have issues with idle or tuning. Usually between 2-5 HP/TQ across the entire RPM range with up to 9-10 at peak on certain applications.