Throttle Body

[4LTURBO]

hey all, just wondering what the standard throttle body size is on my mk1 T? and does anybody know the size of the ss inductions one? cheers...

[Paradoxx]

Big Mouth™ CNC Billet Throttle Body

The standard throttle body has a 70mm butterfly and is very restrictive.

The SS Inductions’ Big Mouth™ Throttle Body with its 75mm butterfly delivers greater torque and throttle response through the entire rev range. Expect an increase of up to 8kW at the rear wheels.

The Big Mouth™ Throttle Body is factory-assembled with bearings, streamlined shaft, butterfly and gears. Fitting is simple and full instructions are supplied. Easily put back to standard if required. Available in Billet for RRP $725.00.

Straight from their website

Edited 10/08/06 08:09 AM by XXXR6T

[bcl]

Big Mouth™ CNC Billet Throttle Body

Expect an increase of up to 8kW at the rear wheels.

A few people have raised the issue of this product recently.

Has anyone actually independently verified this power claim.

Apart from one advocate on this site, no-one has been positive about this product.

Is possible that because at any given throttle opening, other than maximum, the larger throttle allows more air and so it appears more responsive. If this is the case, wouldn’t the same result be achieved by modifying the sensitivity of the electronic throttle control.

Given that there are more restrictions in the diameter of the inlet piping, I don’t see how the larger throttle body will make a difference to peak power or torque. Added to that we are talking about forced induction, where the flow through the throttle body is not a factor in making power, even at most upgraded power levels (IMO).

Maybe there is a power level where the restriction in the throttle body, or its larger diameter to allow a higher air flow becomes a factor, but only when it becomes the focal point of restriction in the overall plumbing.

Comments, as I'm keen to see an explanation!

Brian.

[rboksic]

Big Mouth™ CNC Billet Throttle Body

Expect an increase of up to 8kW at the rear wheels.

A few people have raised the issue of this product recently.

Has anyone actually independently verified this power claim.

Apart from one advocate on this site, no-one has been positive about this product.

Is possible that because at any given throttle opening, other than maximum, the larger throttle allows more air and so it appears more responsive. If this is the case, wouldn’t the same result be achieved by modifying the sensitivity of the electronic throttle control.

Given that there are more restrictions in the diameter of the inlet piping, I don’t see how the larger throttle body will make a difference to peak power or torque. Added to that we are talking about forced induction, where the flow through the throttle body is not a factor in making power, even at most upgraded power levels (IMO).

Maybe there is a power level where the restriction in the throttle body, or its larger diameter to allow a higher air flow becomes a factor, but only when it becomes the focal point of restriction in the overall plumbing.

Comments, as I'm keen to see an explanation!

Brian.

←

I'am with Brian

$700+ for 8kw not value for cash

[boosted_sa]

8kw, maybe on a Boss!

[4LTURBO]

brian, is your car still running a standard throttle body? if so, then I dont know why anybody would change it...

[Paradoxx]

Big Mouth™ CNC Billet Throttle Body

The standard throttle body has a 70mm butterfly and is very restrictive.

The SS Inductions’ Big Mouth™ Throttle Body with its 75mm butterfly delivers greater torque and throttle response through the entire rev range. Expect an increase of up to 8kW at the rear wheels.

The Big Mouth™ Throttle Body is factory-assembled with bearings, streamlined shaft, butterfly and gears. Fitting is simple and full instructions are supplied. Easily put back to standard if required. Available in Billet for RRP $725.00.

Straight from their website

←

The above was simply a paste from their website, I dont think it's worth the $ at all... along with any other SSI product.

[bcl]

brian, is your car still running a standard throttle body? if so, then I dont know why anybody would change it...

←

Yes, still using standard throttle body.

My understanding, given that I did query Nizpro about it over 2 years ago, is that Nizpro had done some testing on mildly modified cars, and found it was not worth the effort, and that was when the product was having problems.

It may now make a difference to my car at the current level of modification, so I don't rule out trying this product, but only on a money back condition if it makes little or no difference. Anything less than 10-20rwkw is just not worth it.

Brian

[TUFXRT6]

brian, is your car still running a standard throttle body? if so, then I dont know why anybody would change it...

←

Yes, still using standard throttle body.

My understanding, given that I did query Nizpro about it over 2 years ago, is that Nizpro had done some testing on mildly modified cars, and found it was not worth the effort, and that was when the product was having problems.

It may now make a difference to my car at the current level of modification, so I don't rule out trying this product, but only on a money back condition if it makes little or no difference. Anything less than 10-20rwkw is just not worth it.

Brian

←

So basically if you want more than 500+ kw then you will need to change it but until then worry about other parts of the motor.

[Paradoxx]

For the price you would expect a huge gain, but I guess for gains over 350rwkw the cost of mods goes up rapidly.