TB Porting?

[KEEP RT]

Porting the throttle body seems to be a low cost mod for a few extra HP and Ft lbs. of torque. The porting process removes material from the inside of the TB making it larger allowing more air flow but only up to the butterfly plate. My question is: is the butterfly plate replaced with a larger Dia. one? If not then I cant see any change in increase of air flow. Can those who actually do the porting answer please.

[SC2150]

No. The plate is the same. The porting process cleans up and straightens the inner bore and that is where the improved off idle response comes from. The CNC spiral pattern porting breaks the surface tension and thats where the increased power comes from.

[IndeedSS1]

On our TB there is a big hump or lip that is removed. I believe with the material in place the front opening is effectively smaller that the blade area. As far as I know VMax replaces the blade as well.

Tracy says the blade is the same but I was sure Pete mentioned the textured blade versus smooth when I spoke with him.

[SC2150]

That is true. The blade is textured but it is the same blade, just finished.

[CC Performance]

Originally Posted by KEEP RT

Porting the throttle body seems to be a low cost mod for a few extra HP and Ft lbs. of torque. The porting process removes material from the inside of the TB making it larger allowing more air flow but only up to the butterfly plate. My question is: is the butterfly plate replaced with a larger Dia. one? If not then I cant see any change in increase of air flow. Can those who actually do the porting answer please.

Its the reshaping of the bowl that produces the extra hp and throttle response. Air wants to travel unimpeded, when you get bumps you have issues with the airflow and it can cause issues in the higher flow or hp range.... air gets backed-up/turbulent and none of that helps to make hp

intake runners are semi rough on heads to help atomize the fuel for better combustion/fuel evaporation. (Look where the injectors are located) The rest wants to be smooth for the best possible airflow..

[Bare Essentials Racing]

Originally Posted by SC2150

No. The plate is the same. The porting process cleans up and straightens the inner bore and that is where the improved off idle response comes from. The CNC spiral pattern porting breaks the surface tension and thats where the increased power comes from.

Good day gentlemen. This is Cajun from BER. I am not a mechanical engineer but I do have one on staff and it is his feeling, as is it mine that completely smooth mirror polished finish beats bumps no matter what pattern or order they are in. That is why we hand maxx port, smooth and polish the inside of each of our throttle bodies.

I dont deal in words or dyno numbers because I can say whatever I want and make a dyno say whatever I want. I am sending Chris one of our hand port, smoothed and polished units. Put it next to the other guys product, look at the quality of work, test them side by side on the dyno and let the truth be told. I want all of my customers to be COMPLETELY happy. If they are not they get thier money back. Period.

[Nomad]

Originally Posted by Bare Essentials Racing

Good day gentlemen. This is Cajun from BER. I am not a mechanical engineer but I do have one on staff and it is his feeling, as is it mine that completely smooth mirror polished finish beats bumps no matter what pattern or order they are in. That is why we hand maxx port, smooth and polish the inside of each of our throttle bodies.

I dont deal in words or dyno numbers because I can say whatever I want and make a dyno say whatever I want. I am sending Chris one of our hand port, smoothed and polished units. Put it next to the other guys product, look at the quality of work, test them side by side on the dyno and let the truth be told. I want all of my customers to be COMPLETELY happy. If they are not they get thier money back. Period.

Wow, those are some bold words. So, first post on this site, you take a shot at a respected vendor who has shown proof that his product provides additional hp and tq. You don't provide any data supporting your claim stating that you can "make a dyno say whatever you want". Then, you want someone to test the TB's side by side on a dyno?

[IndeedSS1]

Originally Posted by Nomad

Wow, those are some bold words. So, first post on this site, you take a shot at a respected vendor who has shown proof that his product provides additional hp and tq. You don't provide any data supporting your claim stating that you can "make a dyno say whatever you want". Then, you want someone to test the TB's side by side on a dyno?

I'm with you on this.

If polishing provided gain then Pete would have the VMax looking like a mirror. Anyone that has actually spoken with him will know he is pretty much obsessed with this stuff.

[CC Performance]

Originally Posted by IndeedSS1

I'm with you on this.

If polishing provided gain then Pete would have the VMax looking like a mirror. Anyone that has actually spoken with him will know he is pretty much obsessed with this stuff.

I have a question.. whats the interior surface of the intake runners on your intake like? Smooth as glass except where the different pieces come together. I think some of you need to be educated on air flow and hydraulics and how it all works. Air over a rough surface will tumble.. this in no way helps airflow.. which is what your trying to do with the TB.
Intake runners on heads are different. they have fuel added

[GTAHVIT]

Originally Posted by CC Performance

I have a question.. whats the interior surface of the intake runners on your intake like? Smooth as glass except where the different pieces come together. I think some of you need to be educated on air flow and hydraulics and how it all works. Air over a rough surface will tumble.. this in no way helps airflow.. which is what your trying to do with the TB.
Intake runners on heads are different. they have fuel added

So let me see if I get what you are saying...

The "rougher" surface on the intake runners which causes the tumbling, helps to atomize the air/fuel mixture? Where the TB is only moving Air.. so since it is only moving air, to allow for max airfow, it should be smooth?

If that is what you are saying it makes sense to me.... Not that I'm qualifed to say right or wrong.


But I can follow your logic.

[CC Performance]

Its a tricky situation to explain really... what you need in one area does not translate in another area all the time... like valve timing .... the way valves are timed/overlapped is to break that surface tension ( using pulse waves) for the air entering the chamber of the heads.. it is need there and a rough surface in some areas helps that as well.. but thats inside the head

[IndeedSS1]

Originally Posted by GTAHVIT

So let me see if I get what you are saying...

The "rougher" surface on the intake runners which causes the tumbling, helps to atomize the air/fuel mixture? Where the TB is only moving Air.. so since it is only moving air, to allow for max airfow, it should be smooth?

If that is what you are saying it makes sense to me.... Not that I'm qualifed to say right or wrong.


But I can follow your logic.

That makes sense to me as well and what I've understood. All I was stating is Pete (well respected), with all of the testing he has done, if polished showed gains why not do it instead? You think he is intentionally holding out on us? I think it's safe to say no. He seems to take great joy in what he does, and likely why you don't see him on forums and instead working on stuff.

[CC Performance]

Originally Posted by IndeedSS1

That makes sense to me as well and what I've understood. All I was stating is Pete (well respected), with all of the testing he has done, if polished showed gains why not do it instead? You think he is intentionally holding out on us? I think it's safe to say no. He seems to take great joy in what he does, and likely why you don't see him on forums and instead working on stuff.

I think the term polishing is maybe your sticking point... its the straightening of the air flow that make it better... polishing is one of those arguments like stroke vs bore.

[GTAHVIT]

Originally Posted by IndeedSS1

That makes sense to me as well and what I've understood. All I was stating is Pete (well respected), with all of the testing he has done, if polished showed gains why not do it instead? You think he is intentionally holding out on us? I think it's safe to say no. He seems to take great joy in what he does, and likely why you don't see him on forums and instead working on stuff.

Nothing agianst anyone... I don't think anyone is deliberately decieving us.

I'm just trying to understand the logic behind the debate.