Engine Drivetrain 1st Gen Cooper S Most liked posts in thread: Ported throttle bodies

Enlarging the throttle body bore will not hasten throttle response and will not increase mid-range power.

The diameter of a section past the vacuum ports on the supercharger intake duct is smaller than OEM throttle body bore size, this limits air mass per time unit before the supercharger, regardless of bore diameter upstream.




Keep in mind when the shape of a bore/tube is altered, its fluid diameter changes. Elliptical shapes flow less volume than round tubes for the same perimeter measurement. The ID profile of the supercharger intake duct is very irregular, and changes shape continuously throughout, this compounds reduced volume affect.

 

Neither larger diameter SC input duct, or larger throttle body, or the two combined will provide improved throttle response. Air volume increase pre-supercharger with these enlarged components is the same percentage whether at idle or pedal on the floor. The info the ECM is processing is key, a tune can be an agent for faster response, or at least a Sprint Booster acting directly on the pedal signal.

As for mid-range performance, the head can only pump so much air volume at a given rpm, to increase performance for that rpm there must be more oxygen density contained in the same volume (or another efficiency enhancement in the combustion process), we overdrive the supercharger to increase density.

 

Wow, blast from the past.

 

Now I came into the MINI thing after the AGS was out of production but I did read about it quite a bit. Correct me if I am wrong here but was not one of the issues with the unit being that made of metal it would heat soak?

If one was to come back on the market would it not be best if the unit was made of or coated with a material that prevented heat soak?

 

Not the same, the air box is not located between the back of the radiator and the front of the block.

 

Thermal coating would not hurt but for the very brief time the air in contained within that short tube it is a non issue. If I ever take mine out I might get it heat treated as the DFIC is and see if it makes a difference .

Randy

 

We want to see the dyno results Randy :wink:

 

This is starting to sound like the old sewing circle we all left, please don't get drawn into that crap again.

 

Nothing that a nice Meth kit can't overcome.:devil:

 

Meth Kit = cleaner valves, more HP and more smiles!

But this is Thread Hijacking...

 

That's funny I did not see your name in the guinness book of world records.

:lol::lol::lol::lol::devil:

 

:cornut: Let's keep it playful Badinage please. Wars are best conducted over at THAT OTHER SITE.

Jason

 

For one thing the car that makes 312hp at the crank is not a track car it is a daily driver.

 

Me thinks Kavs is just a fisherman looking for some bait.........:biggrin5:

 

A "little drag race", if you mean on public roads isn't an opinion.
It's STUPID!

 

Something along the lines of this combined with a ported TB makes a nice change for the better as far as throttle responce goes . As was mentioned earlier the stock tube has some severe restrictions .

Randy

 

Nice metalwork Randy.....

 

Something like that might be along soon again :fingerscrossed: :ihih:

 

that metal pipe looks good. any chance that this pipe ever go back in market?

 

That was a component of the AGS V3 which was discontinued a few years ago . Custom Mini Shop was given the OK to duplicate it but I do not know what the status of that project is .

Randy