do a search on this,,,ull find some good detailed instructions,,,,as for power i dont think u gain much if any on top,,,but your throttle is o so more responsive,,,,and i noticed part throttle power was really the biggest gain...and a ported tb should last u a long time until u start gettin into really heavy mods, so buying a new one is completly up to u
Actually...I just ported mine a few days ago and it is sooo worth it. It costs you around 3 dollars for the epoxy...thats it as long as you can get ahold of a dremmel. It has to be one of the easiest mods for very very little money. If you search for "porting stock tb" you will find tons of information, not to mention step by step instructions with pictures from Ult and many other accredited names on the FJ. Good luck.
i was initially gunna do it sunday night,,,,so i didnt get the chance to get the glue till after 8,,,,all the stores were closed,,,,,autozone was the only still open,,,,only reason i didnt port it sunday night was lack of sun,,(har har) and increased alchohol intake
You don't gain ANY top-end power. If you do, it's Minor.
What you gain is Partial Throttle Power.
In other words, quicker throttle response.
If you do a Search, and see just what it is that's being bored away, you'll see how it really only affects the first half of butterfly movement.
Basically, when it's Stock, there's a lip that only allows the Front side of the opening to be utilized until it's around 70% open.
After that point, it's Full Diameter, w/ only an issue of "Flow Disruption", not "Final Volume".
When you bore it, you're using BOTH Front and Rear sides of the T/B fairly Equally.