Who does? and how much?

I am looking for a cheap, yet decent way to get a 58mm TB without spending 300+....

Thanks.

 

if youa re using a stock throttle body it is impossible to bring it up to 58mm

 

If you wanted to go up to 52mm w/ a stock TB, NOMAD on the board is your best bet.

 

They cant take the stock casting up to a 58MM though.

I dont know exactly why? But i believe I remember someone saying it was because the metal starts to get potted ( Think air pockets in metal ) so when you machine them out that big, you cant get a smooth finish, there will be little holes through it.

Why dont you jsut try and find a used 58MM somewhere ?

 

darn. ok. looks like a used 58 it is! lol. thanks guys.

 

Save yourself some money and get the stock TB ported to a 52mm. It will work great for a heads and cammed 355.

 

The stock throttle body casting can't support a bore larger than about 53.5mm. Once you go that large you machine through the casting walls and destroy the throttle body. If you buy a ported stocker make sure the porter installs sealed roller bearings. Some say you don't need them but I strongly disagree, all the aftermarket units have them. The steel shaft will wear into the aluminum housing with higher mileage. A ported 52mm stocker with the sealed bearings can be had for $175.

 

From who? With or without core? anyone gotpics?

Thanks.

 

I don't see the big deal with getting a 58mm, its only $100 more than a used ported stocker.

 

I would DEFINITELY go with the 58mm tb over getting one ported. I had mine ported, felt like it ran better, then it was the cause (im pretty sure of) of my car idleing COLD at 400-500 rpm's. Put a BBK 58mm on, and my car idles COLD at 800rpm's or so, and warm at 500rpm's. Definitely feels a lot more responsive, and just a lot better quality. Only downside is having to port the intake to match the 58mm gasket.

 

Cool, well I'm going to pull my intake to change the gasket anyway, so porting to 58mm might not be so bad.

Would it cause any drivability/running issues while this motor is still pretty much internally stock? I do plan on a 355 in the future with heads/cam.

Thanks,

Igor.