98NBMSS

Anyone know who makes the best ported throttle body? I have been looking into the new Thunder Racing CNC ported one. Anyone have this TB?

NX†C

Mine. I'd have to get pictures of it though. It was done by TrahnZam (NickG). Show quality and outflows the competition.

I8COBRA

iTrader: (56)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by X']['C WS6:
<strong> Mine. I'd have to get pictures of it though. It was done by TrahnZam (NickG). Show quality and outflows the competition. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Please post more info and pictures on this one.

<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

NX†C

Edited, not a sponsor.

<small>[ February 11, 2003, 10:05 AM: Message edited by: Pro Stock John ]</small>

deviate42

iTrader: (2)

All of them pretty much show the same gains, and quality. This is kind of like a "whats the best lid" question..its all what you like.

Pro Stock John

iTrader: (34)

I would not have spent so much time polishing the inside and the blade since it's going to be all covered up.

I like Bauer or Jantzer.

I am gonna send one to one of those guys in a week or so and have it done up.

WILWAXU

iTrader: (6)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Bounce?:
<strong> All of them pretty much show the same gains, and quality. This is kind of like a "whats the best lid" question..its all what you like. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Hehe.. I couldn't have said it better <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

If all things are equal, support our sponsors!

Gev

Home brew!

I did mine myself and am very pleased with the results. Also did the throttle body bump stop mod too. Got it to open to 89.8* If you've got a dremel, I say do it yourself.

NX†C

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> I would not have spent so much time polishing the inside and the blade since it's going to be all covered up.

I like Bauer or Jantzer.

I am gonna send one to one of those guys in a week or so and have it done up. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">the polishing on the interior is to proivide as much gain as possible from smoother airflow. all relative to the laws of fluid dynamics as taught to me by the producer of the item.

Old SStroker

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by X']['C WS6:
<strong> ]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">the polishing on the interior is to proivide as much gain as possible from smoother airflow. all relative to the laws of fluid dynamics as taught to me by the producer of the item. </strong>


Evidently we had different fluids teachers. Mine taught me that there is no actual flow at the surface.

Because of the viscosity of the air (fluid), the velocity at the surface is zero; the molecules of air sorta stick to the surface. There is a boundary layer perhaps a mm or more thick, where the air velocity changes from zero to the stream velocity.

We have flowed CNC machined head ports that are far from polished; polishing them (without removing significant material) sometimes makes the flow worse. Sorta counter-intuitive isn't it?

Fenris Ulf

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Old SStroker:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by X']['C WS6:
<strong> ]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">the polishing on the interior is to proivide as much gain as possible from smoother airflow. all relative to the laws of fluid dynamics as taught to me by the producer of the item. </strong>


Evidently we had different fluids teachers. Mine taught me that there is no actual flow at the surface.

Because of the viscosity of the air (fluid), the velocity at the surface is zero; the molecules of air sorta stick to the surface. There is a boundary layer perhaps a mm or more thick, where the air velocity changes from zero to the stream velocity.

We have flowed CNC machined head ports that are far from polished; polishing them (without removing significant material) sometimes makes the flow worse. Sorta counter-intuitive isn't it? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Evidently you didnt listen very well in Fluids else you would have remembered the formula for laminar boundary flow thickness on the walls of a pipe and remembered that its directly correlated to the surface roughness. In other words the smoother the surface is the better the flow.

TrahnZam WS6

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> I would not have spent so much time polishing the inside and the blade since it's going to be all covered up.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">LOL PSJ, that's great!

"We didn't touch the combustion chambers on your heads because no one really sees them anyways..."
-'Wise' Head Porter

VINCE

iTrader: (1)

If I only had money.. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Old SStroker

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Fenris Ulf:

<strong>Evidently you didnt listen very well in Fluids else you would have remembered the formula for laminar boundary flow thickness on the walls of a pipe and remembered that its directly correlated to the surface roughness. In other words the smoother the surface is the better the flow. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Laminar flow? You are saying we have laminar flow in an LS1 TB at WOT and high rpm? What Reynolds number are you estimating?

I thought that TB looked familiar.

NX†C

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TrahnZam WS6:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Stock John:
<strong> I would not have spent so much time polishing the inside and the blade since it's going to be all covered up.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">LOL PSJ, that's great!

"We didn't touch the combustion chambers on your heads because no one really sees them anyways..."
-'Wise' Head Porter </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"><img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" /> Classic!

Fenris Ulf

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Old SStroker:
<strong> Laminar flow? You are saying we have laminar flow in an LS1 TB at WOT and high rpm? What Reynolds number are you estimating?

I thought that TB looked familiar. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sorry, turbulent flow. Classical turbulence theory held that the boundary layer and inner layer of fluid flow only interacted in a limited manner. Early fluid mechanics concluded that the surface geometry only affected the velocity distribution in the boundary layer and the fluid flow was unaffected. In reality the velocity profile is significantly affected by the surface roughness outside of the boundary layer, proving the assumption of separation between the fluid flow and boundary layer to be false.

Fenris Ulf

Found this for reference:

http://www.mtf.ntnu.no/PEOPLE/PAK/LAB/ExpFluids27.pdf

I8COBRA

iTrader: (56)

I agree that polishing the inside of the TB is an overkill. Smoothing out is beneficial but a high polish is just wasted time.

The reason why heads are polished is to reduce carbon build up, this is why polishing is done only on the EXHAUST ports. The intake ports are only ported and smoothed out, polishing will not increase air flow.

Jantzer98SS

iTrader: (54)

Wait until you guys see the TB I'm finishing up now! My latest improvements in flow and looks are just gonna FLOOR YOU! I've learned there are a lot of different ways to port/polish the housings and the finer flow enhancements and I'll get some close-ups of just what I'm doing.

You are right, the housing are ported about the same, i mean 75mm is 75mm opening. It's the extra's that seperate the best.

I'll have pics up tomorrow. So get on the edge of your seat. It's a MUST see. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

JasonShort

iTrader: (242)

Well, I am going to have to agree with OldSStroker. There is no flow along the surface of ANY material....no matter how smooth or rough it is (no-slip boundary condition). We are only talking TBs here and there is no accurate way to calculate the Reynolds number thru a TB.

Mabye my fluids professors didnt teach me correctly tho? <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Jason