tb porting
12-22-2008, 01:47 PM
#1
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tb porting
was wondering if anyone has ported there throttle body and noticed any thing.... i saw that someone did it on the forum for 150 bucks but i havent heard of any responses from it. i was thinking about doing this over winter break while im at the inlaws. thanks
12-27-2008, 05:10 PM
#4
FEED\Fujita eng. sells a "bigger" throttle body at an insane price. It has got a 2mm bigger bore.
By the way, remember that not always a very smooth, polished surface will help the flow if i remember right. There are times where the right porosity is better (especially with air\fuel mixtures but that's not the case).
I hope that somebody will explain this better than me though
By the way, remember that not always a very smooth, polished surface will help the flow if i remember right. There are times where the right porosity is better (especially with air\fuel mixtures but that's not the case).
I hope that somebody will explain this better than me though
12-27-2008, 05:14 PM
#5
True. If the TB is larger than the manifold itself things flow may diminish.
The concept that rough surfaces flow better than smooth ones is called "boundary layer effect" and it is what makes golf ***** fly in particular manners and different trajectories.
The concept that rough surfaces flow better than smooth ones is called "boundary layer effect" and it is what makes golf ***** fly in particular manners and different trajectories.
12-27-2008, 05:25 PM
#6
Yes, plus if you have a fluid or a mixture flowing somewhere if you have some calculated porosity you create a thin air cushion that speeds things up.
Like playing Air Hockey but you don't brake anything :p
Like playing Air Hockey but you don't brake anything :p
12-27-2008, 05:42 PM
#8
If we're talking about air yes, but if it is a mixture or a liquid the small porosity (not a machinegunned wall 
) will retain air. That's where the air cushions come frome. Then the mix should be able to move\flow over the thin layer of air without being slowed down by the "superficial" particles slowed down by the metal. Some porosity also helps avoiding condensation.
These differences are so small that you don't even notice them on a flowbench so polishing might be a good solution.
I apologize if i made mistakes in the explanation but that's pretty tough to explain in a different language.
) will retain air. That's where the air cushions come frome. Then the mix should be able to move\flow over the thin layer of air without being slowed down by the "superficial" particles slowed down by the metal. Some porosity also helps avoiding condensation.These differences are so small that you don't even notice them on a flowbench so polishing might be a good solution.
I apologize if i made mistakes in the explanation but that's pretty tough to explain in a different language.
12-27-2008, 05:51 PM
#10
Yes, that's why i said in my first post that this is not the case
A polished throttle body? Have a Holiday and try mine out :p
There's not much of a difference in terms of g\cm^2 of flow but it's still something especially when you are tracking the car at high rpms for a long time.
A polished throttle body? Have a Holiday and try mine out :p
There's not much of a difference in terms of g\cm^2 of flow but it's still something especially when you are tracking the car at high rpms for a long time.
12-28-2008, 10:55 AM
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I Am at my inlaws house I don't have my camera but I can get some up next week. Did you notice any inprovmemts in the car after putting it on. I don't know if it is going to be much better but it can't hurt.
12-28-2008, 10:59 AM
#14
Removing the ridge\restriction could affect the low end response and maybe the idle. I'm not sure, so i just left it there. The increase is so small you probably won't feel it with your back :p an obd scanner will tell you more with a before\after test.
Still, it is nothing like oh my god, vtec just kicked in!
Still, it is nothing like oh my god, vtec just kicked in!
12-28-2008, 11:21 AM
#17
That's why i demand pictures now, i want to have a closer look at your work
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