BADSZ28

iTrader: (39)

As stated in title. Do porters put in larger blades, or just clean them up, block the holes, and fix the stop. This also may vary by porter. Who does and who doesn't?

Thanks

MeentSS02

iTrader: (11)

My Jantzer piece uses the same size blade, as I'm sure most others use as well. Most just do as you say...clean them up, fill the holes, and fix the stop.

SScreaminDemon

It depends on how much you are porting it. Too much and you'll have to get a larger blade.

cyphur

iTrader: (10)

um if you know where you can get a larger blade, i'd love to hear it. that'd be a BITCH. **** up the seal and you're DONE. time for a new tb. or time to spend a hell of a lot of time with some jbweld, a dremel, and the blade trying to fix the seal. thats why its always important to keep track of where that area is, and to leave it alone when porting your own. its a restricted area lol.

BADSZ28

iTrader: (39)

Yeah I heard to many horror stories with home porting. I just wanted to see if the pros do it.

Thanks

NLang

iTrader: (12)

Porting is just smoothing out the passage before the throttle blade. Enlarging the actual bore is called boring. That's the one and only case that'd need a larger blade. I had a company that overbored, ported, polished, shafted, ect. throttle bodies. The factory LS-1 unit can be bored to 78mm max with just a little material added. I actually still have one brand new 78mm unit on a shelf if you're interested ($240).
The 'pro's' know where to stop-right after the vortex. The best/easiest way for a first-timer to port their own unit is to first trace around the blade with a sharpy before dissassembly. This way you'll know where exactly to stop before you ruin the unit.
Let me know if any of you guys plan to try. I've done hundreds of units for many different yrs, makes and models. W/o a milling machine, lathe, or know-how to make the tools required to even make a blade, you at home cannot overbore. But, you can do some porting and maybe even shafting that'll atleast help a little.

LS1LT1

iTrader: (16)

What about 'sharpening' or thinning the upper edge of the stock sized blade so that it cuts the air better when open, is that common practice (my PTB doesn't seem to have that done)?

GM Muscle

iTrader: (9)

I bought from a shop that sells on ebay and mine did come with a slighlty larger blade. It's a pretty nice piece and the blade seals great.

NLang

iTrader: (12)

Being that it has a slightly larger blade, it also has a slightly larger bore. That's just how it works...

Never 'knife-edge' a throttle blade. You can ruin the seal, and also cause it to stick shut if closed rapidly.

LS1LT1

iTrader: (16)

Ok, thanks.

Ferocity02

iTrader: (60)

"Porting" LS1 throttle bodies isn't really porting... It's more like smoothing out the airflow.

NLang

iTrader: (12)

That's what a port does bud... 'Smoothing' would be more related to deburing, which isn't really needed with these becasue the casting is already pretty smooth. With these, you remove the vortex, port the new transition, shave down the beginning of the opening, and maybe fill and drill the IAC/PCV opening. Shafting isn't porting, but that's another good way to let in more air @ WOT.