Ironxcross

iTrader: (8)

And decided to port my throttle body. I have an air foil thing on there and though it looks more efficient then stock, all the bumps and nonsense seem to make me think otherwise, especially when you look at aftermarket TBs (which are perfectly smooth). So I filled in the space between the foil and TB with a metal putty and sanded it all down til the bores were even, and the bumps were removed. It looked much better then before so I put it on my car.

Once it was hooked up, I started it. Everything sounded the same except now its got this supercharger-like whistle, that in increases with rpm. So I take it for a spin. Either it was the cleaning out of the tb (although it wasn't dirty) or the smoothing and evening out of the throttle body bores, but the car feels a little more peppy. Especially in the first gear pulls up to about 50, it seemed like the car just instantly found my 5800 shift point.

Call me crazy, but I think it made a difference. Plus that air whistle sound is pretty cool too.

Pics:

SPEEDYTRANSAM1996

iTrader: (37)

did you sand dwon the intire inside of the throttle body and whats the stuff you used to cover all the seems?

tspence45

iTrader: (30)

Looks like you did a pretty good job on it. I was thinking of buying a stock TB and doing the same thing to it. But, I just haven't had the time. I think the S/C-like whine is pretty normal. My buddy's 99 Cobra had a ported TB on it and everyone swore the car was S/C'ed. Were you able to use the stock blades for it too? Or did you have to get bigger ones to cover the opennings?

Ironxcross

iTrader: (8)

I only sanded down to where the blades were. The stuff I used to fill in all the seams is some kind of metal epoxy thing that becomes cured with heat.

Thanks. I'm using the stock blades. I stopped my porting at the blades, but I ported front and back on the TB.

Formula350

iTrader: (3)

Then you didn't port, you just funneled

lt170chevelle

iTrader: (2)

I did the same to mine several years ago and thought mine felt more peppy but i think it was all in my head LOL

tspence45

iTrader: (30)

Where can you get bigger tb blades? I was thinking about picking up a stock tb and boring it to 52mm or maybe even 54mm. But, I can't find a place to buy replacement blades for them.

Ironxcross

iTrader: (8)

the best funnel ever, mind you

porksoda

iTrader: (39)

Its like a Tornado from Autozone!

97badass

iTrader: (8)

only its a hurricane

oh and btw to the op what did you use to sand it down?

Ironxcross

iTrader: (8)

Some porting kit I got off of summit

97badass

iTrader: (8)

fwiw you might want to knife edge the blades...might give you a little bit more air flow...
but how can it flow any more than it used to? you still have he exact same size hole where the blades are...