Boring 101
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BUY SR´s TB otherwise you´ll be in big TB(Trouble)!!! 
No offense for your knowledge,but you cant make undoubtful experiments to your car!!
SAFETY FIRST...
I know this work seems simple for someone who´s into mod´s but believe me also if you are using a flowbench meter you migh face a reduce in HP of 15-25hp!!!! eek.gif eek.gif eek.gif
No offense for your knowledge,but you cant make undoubtful experiments to your car!!
SAFETY FIRST...
I know this work seems simple for someone who´s into mod´s but believe me also if you are using a flowbench meter you migh face a reduce in HP of 15-25hp!!!! eek.gif eek.gif eek.gif
Super Moderator
Joined: May 2001
Posts: 11,851
Likes: 2
From: Rancho Palos Verdes, CA
Vehicle: 2008 Toyota Prius 2006 Suzuki SV650S
If you are going to be boring out your TB and the opening to your IM...you MIGHT be able to do this yourself...
The TB and IM opening should be bored out to 58mm if you are boring out a stock Tb. However, you now need to manufacture/create a new 58 MM throttle body butterfly. You need to create it within .5 MM tolerance, and you need to bore the TB out to 58 MM and it needs to be 100% true. If you are over .5MM off center you will punch through the wall of the TB.
In other words...I would not reccomend it, but you can try it. Just be prepared to buy a new TB if you mess it up.
The TB and IM opening should be bored out to 58mm if you are boring out a stock Tb. However, you now need to manufacture/create a new 58 MM throttle body butterfly. You need to create it within .5 MM tolerance, and you need to bore the TB out to 58 MM and it needs to be 100% true. If you are over .5MM off center you will punch through the wall of the TB.
In other words...I would not reccomend it, but you can try it. Just be prepared to buy a new TB if you mess it up.