I have a big bore throttle body custom made for my customer. I want to see what you guys think and if there is enough interest, I will start to retail it to general public.



http://www.rotaryextreme.com/tb-1.jpg



The top TB is the stock one. The bottom TB is the modified one.



The top 2 ports are ported by 4mm in diameter and also the center part is machined out. That will make the total flow area increase by about 20%. A custom merged one piece butterfly plate replaces the stock ones. I can have stock upper intake manifold machined to match with the top ports.



The target price for the throttle body modification is $400. The upper intake manifold modification is $175. All parts are CNC machined. The butterfly plate is made of 6061 T6 aluminum.



Chuck Huang

holy crap thats awsome

Quality part, nice work. Dyno run? May help to have some numbers to help equate performance gains vs. $

Think you can do that kind of work to my 20B Throttle body Chuck?

wow that is awesome! is the bottom hole enlarged any... what do you think performance gains would be?

The customer's car is at the bodyshop right now. After the car comes back in about 2 weeks, we will put it on the dyno to see what it does. Thanks.



Chuck

Yeah, I can have it done on your 20B throttle body. https://www.nopistons.com/forums/pub...IR#>/smile.png



Chuck

I didn't enlarge the bottom hole because the screws to hold the bottom plate are really hard to take out without stripping the head of the screws. I guess I will figure out a way to do it if people are interested in this mod. https://www.nopistons.com/forums/pub...IR#>/smile.png



Chuck

thats cool, i would definately buy one in the future...20% is a decent number..i'm sure many people would buy it

thats interesting