Is there any difference in the different tb airfoils on the market other than price? Does anybody have a particular preference.

 

Just buy the cheapest one, they all perform the same function.

 

Well - I don't know for sure.

I bought a generic one, and it isn't metal it's plastic. The part that cuts the air flow to reduce turbulence is somewhat blunt... I alwasy thought that foils had sharp edges cause that made sense to me.

 

There still all the same, you want sharpe put a razor blade in there.

 

Hehe dont roll your eyes at me!

I was just questioning, whether or not anyone knows if all the foils are sharp or blunt or what have you, cause if they aren;t then one of the two must perform better.

 

Yes... paperweight.

 

I disagree with that.
Flow bench testing has proven that an airfoil will allow around
12-20cfm more in a stock 48mm gm throttle body.

 

In my research, I found that a slightly blunt airfoil, or even jet or rocket nosecone, was preferred for subsonic speeds. When supersonic speeds were to be encountered, then a sharp point was the preferred shape.

 

airfoils really do make a difference..obviously not much, u can barely notice it but after i put in mine, my car accelerated smoother..really..worth the money i think

 

Ok then! So I appreciate that subsonic supersonic reasoning. My mind is at ease now =D


I figure with the dual snorkel intake, an airfoil with cut airboxes should be a nice little mod. Ready to compliment a high flow TPI setup.

 

i have the tpis one i think..

 

In my opinion they're all about the same, the only difference is in the materials they're composed of and how they're retained in the throttle body. Avoid the JET, Holley, and other composite airfoils. I'd also avoid the generic no-name pieces that are sold on ebay. Stick to SLP, Hypertech, and TPIS... They're all aluminum and held in place with a screw/nut.

As for the shape effecting performance, I doubt it. All you're trying to do is smooth the flow of air in the throttle body. GM left a large open space between the bores to channel air into the IAC passage. By installing an airfoil you're making the passage smaller and giving a more aerodynamic method of letting air into the throttle bores. As long as the air doesn't hit an edge it can't move around easily, it'll be fine. Flat spots are what you want to avoid. Any of the airfoils will be better then the stock configuration, but none of them are going to be enough better then another that any of us will ever feel it when we launch at a stoplight.

 

Yes, avoid the composite ones like the plague. Carbon composite and alumnium do not behave well together, the alum will begin to corrode at an alarming rate.

 

is the comp cams one included in that list. I believe that it is a plastic composite similar to the ls1 intake manifold.