enlarged throttlebody?

[Dash]

Perhaps uprated cams help provide extra flow which an enhanced body would make use of?

How do you think you extract 270bhp from a 2.0 engine?

I could tell you, but your'e not likely to believe me.

 

[drhowser]

please. someone. actually do the exercise.

 

[Andyman]

I pm'd a lad on here a year back who had a enlarged Jenvey TB fitted and he claimed it made bugger all difference.

Going by the fact tuners arnt exactly falling over themselfs to promote a larger TB on a 172/182 this would certainly match up to the reports of it not worth messing about with

i have a larger jenvey tb, and along with other mods it DOES make a noticable difference to the drivability of the car - imo of course

Who's to say it isnt your other mods making the real difference

Like someone already said, the only real proof is to get a standard car and do a before and after.

 

[TheJesus]

please. someone. actually do the exercise.

they have... people chose to believe BenR and never question it though...

maybe I should post up MY AWT experience?

 

[MarkM]

please. someone. actually do the exercise.

Its been done.

"Similarly, in an experiment to curb the power of 270 BHP touring car engines, we reduced the size of the single throttle body to less than 44mm (1520 sq mm) before there was any noticeable reduction: a 75mm body has three times the flow."

If a 44mm opening provides enough air flow into a 2.0NA engine to produce 270bhp why do you need to enlarge the standard TB on a 200bhp engine to produce more power?

 

[MarkM]

please. someone. actually do the exercise.

they have... people chose to believe BenR and never question it though...

maybe I should post up MY AWT experience?

WHEN!!!

Who did it and where are the results.

 

[MarkM]

How do you think you extract 270bhp from a 2.0 engine?

I could tell you, but your'e not likely to believe me.

Do they use uprated cams?

 

[Dash]

If I said yes you will find fault and if I said no you will find fault.

How did you get on at Devil the Torque of?

 

[drhowser]

i was meaning on a clio, with a before and after. i'm still at a loss as to what the benefit of this is?
so far we have a few people who have done this and found an improved throttle response. which can be done by remapping anyway on the fbw bodies, you can alter the ratio between the two potentiometers.
power wise, we have been told that the gdi car has an enlarged body, but what difference did it make? unless i've missed it, there have been no specific figures? just more buyitbuyitbuyit.

 

[MarkM]

If I said yes you will find fault and if I said no you will find fault.

How did you get on at Devil the Torque of?

Are you sure you want me to tell you? I would write a full report but I fear for GDIs reputation :clown:. That reminds me I must get round to sending Andy the bill.

 

[TheJesus]

please. someone. actually do the exercise.

Its been done.

"Similarly, in an experiment to curb the power of 270 BHP touring car engines, we reduced the size of the single throttle body to less than 44mm (1520 sq mm) before there was any noticeable reduction: a 75mm body has three times the flow."

If a 44mm opening provides enough air flow into a 2.0NA engine to produce 270bhp why do you need to enlarge the standard TB on a 200bhp engine to produce more power?

aaah, I understand now, it's only pointless on a 2.0 engine then because they are all the same, but other engines can benefit?

this is hardly conclusive to Clio's is it Mark? Different engine, on a race car, but I gather every 2.0 engine is the same from this lol

FAO drhowser - no one has said buy it, people just went off on one saying it's pointless yadda yadda yadda based on what Ben's told them... at no point has anyone said "buy one" or mentioned any prices

 

[MarkM]

Just in case people were bored of reading what TheJesus thinks about an enlarged TB.

omg i'm so bored.

F3, 235bhp on a 26mm hole...............go figure.

Is it the size of the hole, or how well you use it?

If a bigger TB is all thats needed to make whopping power, why wasnt the factory item made 70mm?............

Infact you've lost me.........who builds what for the clios? Tell them what they need to hear in accordance to what they are selling? Good thing i'm not selling anything along the lines of such things, or maybe i need to be?

Some of us understand.

A bigger TB will give "better" throttle response at small openings. But at higher throttle openings its not the TB that restricting the airflow, its other things in the intake tract. So you don't change your peak airflow/power by increasing the size of the TB, you just get more horsepower at small throttle opening, and less additional horsepower by opening the throttle further. Which makes the car jerkier to drive in traffic. And if you did want that you could achieve just as easily with a cable-operated TB by changing the leverage, or on an electronic throttle with one of those electronics boxes that senses you pushing hard on the accelerator and opens the butterfly faster.