Where are the aftermarket thottle bodys?
To my knowledge larger Throttle bodys have shown gains in other cars.

Maybe a larger Tb(throttle body) will help the decresing cruve of the de.

Things i think about with this mod is a larger diameter in the neck of the plenum to make use of a larger TB. and also a larger intake tube

What do you all think?

 

that would be nice but i think it sits too high for u to make it much bigger...it would hit the hood....or i would have a 90mm tb already installed!!

 

the TB is not a bottleneck on our cars. There are those with the stock throttle body that are putting down over 1000whp.

 

Keep in mind that bigger is not always better (hold the jokes)

Velocity is always a factor --- the Ram effect (hold the jokes)

A TB like a Carb has to be sized to the engines potential. An engine is a Pump, It pumps air. If you Mod to the max and or are looking for Salt Flats all out top end, fine. What you gain top, you loose Bottom and Mid

 

Since 03, there have been companies looking to fabricate a new TB and open it up a bit. But one has to understand that this modification/application is really for NA motors because the FI applications really have no need for this mod. That is the reason it has stalled to some degree. NA folk eke out hp, whereas FI folk just blow more air without concern for the tb opening (no disrespect intended). I will do some searching because I remember someone working on the throttle body but if I recall correctly they never put it in production.

 

well i know aceman has ported his throttle body and it made some difference.

anyways i think aftermarket oned should be made.
that way there can be some researching done.

 

I remember somebody saying they pulled 5 or 6 higher with the AAM tb spacer...I just don't think there is that much potential there.

 

There just isnt ---If anything, at times a bore reducer actually helps and mods to increase turbulence

Free flow out is good (exhaust) ((with proper back pressure))

Turbulence in is many times good with intake

 

tb spacer doesnt do anything in gains.. it is just a metal square extension of the intake tube.

 

why wouldn't make more hp on an FI car?

 

Apples and Oranges ---NA the pump (engine) is pulling air in or trying it's best to

FI ---the Pump is force fed

The NA needs a helper to "tribulate" that air---hence designed velocity

The FI needs non restriction for the force feed

 

I have always been a fanatic with flow characteristics---Head intake port, exhaust port, valve cuts/sizes, cams with lifts, durations, overlaps--exhaust

You have to picture in your mind what is happening

If I shift from 2nd to 3rd, I can see the pedal depressing and the master compressing and the compressed fluid traveling to the slave and the slave pushing the fork thats pivoting on the ball thats sliding he throw out, thats contacting the diaphragm that allowing the disc to release etc etc---and beyond ---the forks in the trans and the gears sliding the syncros doing their job and the out put shaft running transferring HP down the line

Its the same with induction----you have to understand how this HP Pump works

 

Say what "NA the pump (engine) is pulling air in or trying it's best to"

The Earth's 14.7 psi pressure [acts like a supercharger] and forces the air into fill the lower cylinder pressure from the exhaust leaving by heat expansion.

Why do you think an engine sucks in air?

Anyway best to measure the real pressure drop across the TB plate/housing to decide how much of the less than 7"WC H2O or 1/4 psi worst case you can improve.............normally [with NA] the 1-2" WC improvement is inconsequential.

Now with supercharging the flow goes up so does the pressure drop across the TB. These JAVA calculators will help you calculate your situation.

http://www.pipeflowcalculations.com/...drop/index.htm
http://www.pipeflowcalculations.com/airflow/index.htm

 

I agree to>.

 

But wouldn't a larger sized throttle body give a bigger diameter throttle body ,bigger inlet of air for the intake system on yourPUMP ENGINES and on yourFORCED FED ENGINE. More Velocity
If anything it would for surely make a difference on a FI engine.
Larger = better flow...

Or am I wrong?

 

Velocity (speed) is achieved by pumping (pulling/sucking more air) through a smaller diameter orifice

If a pump has X GPM capacity and it is demanding that capacity, the speed will increase if the (hole/throttle body is smaller)

It DEMANDS that air ---It HAS to go through a smaller opening----It HAS to travel faster to do so

 

FI and NA is Apples and Oranges

 

Hence--FORCED INDUCTION and NATURALLY ASPIRATED

 

Short track NA racers will use 2 barrel holleys rather than Quads on 302s or 350s ---It creates that RAM effect (awesome velocity) for coming out of corners and nailing it ----they Scream
True --Carb -- a gas mixer and TB a air inducer but it is that Ram they need

Like the RAM you get from FI

 

The best "burn" is achieved by the best atomization of fuel---thats whats cool about Fuel injection but that can be increased furthermore by greater speed of air rushing past the open valves and creating turbulence that will achieve that.

Its like a can of gas--its fairly safe --But turn that gas to fumes--you have a volatile situation