Throttle Body

[Spoolin4]

Are most people running stock or is there a good aftermarket throttle body?

[Spoolin4]

I thought by now I was going to get some smart ass response like "search for it". Ha thats very surprising.

[crashkelly]

i think a lot of people are just getting their existing one bored out

[Spoolin4]

when they are going to get it bored out are they have to a bigger ventury(butterfly) or will the stock one seal?

[crashkelly]

I dont think so, but i havent had mine done so i cant tell you for sure

[Spoolin4]

I dont think so, but i havent had mine done so i cant tell you for sure
At least your honest and didn't tell me some bullshit.(thank you). I've some guesstamated bullshit on here, but if one does know please give me the 411.

[ozmojo1]

pretty sure corksport.com sells a bored out one.

[peepsalot]

Yeah the price is ridiculous though. f that

Edit: actually, I just looked at the site again to refresh my memory. They sell two versions: ridiculously priced Auto EXE TB, and a cheaper bored out stock TB option(still too much cost for my tastes).

[Spoolin4]

I'll just bore out my stock one at a local shop. No need to pay crazy prices for something I already have.

[gone_fishin]

The problem with boring out the throttle body is you do need a ventury with a wider diameter to properly seal. Additionally, the whole TB boring process is something useless unless the Intake Manifold-to-Throttle Body port is matched to the newly widened diamter of the throttle body port. As is in the case when a head and manifold aren't port matched, this creates "walls" effectively damming air and creating eddies within the plenum-- disrupting the objective laminar flow to the head. This (obviously) creates some rather strange flow patterns within the manifold plenum itself.

I have no idea if this would significantly change (for the worse) the results from a bored TB, but I do know that when porting an intake manifold, a manifold outlet port of wider diameter than the head inlet port produces this same effect, and the result is highly detrimental to improvement-- in cases such as these you might actually see worse performance over the unmodified manifold.

[Spoolin4]

The problem with boring out the throttle body is you do need a ventury with a wider diameter to properly seal. Additionally, the whole TB boring process is something useless unless the Intake Manifold-to-Throttle Body port is matched to the newly widened diamter of the throttle body port. As is in the case when a head and manifold aren't port matched, this creates "walls" effectively damming air and creating eddies within the plenum-- disrupting the objective laminar flow to the head. This (obviously) creates some rather strange flow patterns within the manifold plenum itself.

I have no idea if this would significantly change (for the worse) the results from a bored TB, but I do know that when porting an intake manifold, a manifold outlet port of wider diameter than the head inlet port produces this same effect, and the result is highly detrimental to improvement-- in cases such as these you might actually see worse performance over the unmodified manifold.
In two weeks i'm sending my head to ken at protegegarage to do a port and polish and buying their intake manifold so i guess i should just talk to him about that and see what he's got to say.

[gone_fishin]

In two weeks i'm sending my head to ken at protegegarage to do a port and polish and buying their intake manifold so i guess i should just talk to him about that and see what he's got to say.

It's a valid concern.

[mazdaspeedwerx]

how much does ken charge to port the head? I am getting ready to do this as soon as it gets here