I was wondering just how many have done this? What the seat of the pants (Butt-dyno, its cold out so mines a little numb right now) verdict is? If there where any numbers to back it up? And if good results where achieved does anyone have a decent how-to on it?

It's some thing I saw tossed around a long while back, but theoretically sounded like it fixed a major weakness at basically zero cost, so if results are good I'd like to here the info on fixing this bottleneck.

 

What is the broom handle mod?

 

Yeah, what is it? not in his gallery.

 

The broom handle mod = cut the broom part off = ready to play stick ball.

Did I win?

No?

 

The seat of your pants will appreciate it. It's also much easier to sit once you remove it.

 

Take the supercharger intake duct, use a heat gun on it, and with a dowel rod (broom stick, pastry rolling pin, clothes hanger poll, etc.) even the interior shape. The problems with this mod are: It can only alter shape (hydraulic diameter) not the restriction (narrow neck behind the hose vent boss), and there is a risk of the duct contacting the back of the radiator fan bracket.

 

Havnt the number from the AGS shown that this is not a bottle neck?

-Brian

 

Quite the opposite, in fact. This tube is very much a bottleneck.

 

And how have you shown this? Computer models or real world testing? How come when I tested the V1 it did not yeild any power or torque gains over the stock system? Same dyno same day.

And why are you guys selling the HDI now? Is it because it will make power?

-Brian

 

Did you have it on backwards?
Well, rumor has it that the vendor that sold it orignally couldn't pay the bill, and was basically cut off. It was then offered to M7 so the MINI community could continue to purchase it. By the looks of it, it probably does make a few horsepower.

Sorry for the hijack.

 

M7 dropped the AGS mainly because of the high cost of production vs. the low sales because the the high price of the product. With the HDI, they can offer an affordable CAI which can compete with the popular Alta. Its not M7s fault that the original vendor selling the HDI lost their contract with the manufacturer...

EDIT

Sorry about taking this thread further off track.

I have never heard of this method. It does sound interesting though. If someone can provide some numbers and better instructions on how to do this, it would be much appreciated.

 

Ok ok if you want to battle vendors please take it to another thread. The mod at hand is the "the broom handle" not who or why each CAI is sold by.

So what are ways around this bottle neck and means a of smoothing the airflow into the SC.

 

I read a couple threads on MINI2 about this mod, a long time ago. Maybe do a search over there.

I also remember Tuls had a tube from a MCSa, which for some reason, looked A LOT better(less restrictive) than the one for a MCS, this too was a long time ago. Maybe check that out.

 

If somebody wants one, I have one for sale. Brand new, never used.

 

Can you post a pic of it for the guys in this thread?

I'm curious has to why you would have one of those, lying around brand new.

 

I'll have to dig for it.

Bought it for a project. Moved along, never touched it.

 

also had a bunch of glue flash that could inturupt air flow. Some of the early modders did these changes to good affect. When I took my tube off ( Aug 02 build), there was slight glue flash, but not as bad as others.

Is it a bottle neck, yes and no, modding the pipe will reduce pre-SC pressure drop a bit, it's an open question as to what this will do for power production. There are undoubtedly other things that are worse....

Matt

 

Yes please post a pic.....

 

Picture, as requested!

 

If the thread has now veered towards a discussion about the MCSa supercharger intake duct, here is a classic NAM discussion (one of my all time favorites). It’s hard to believe this was only a year ago. https://www.northamericanmotoring.co...ight=MCSa+duct
What disappoints me is the 90 degree bend after the throttle body and the second kink after the vent boss; it almost looks like a drain trap. As for fitment it will require a different bracket, TB & BPV hose.

 

Roland at GTT in England started the broom handle mod. Here's a reference with his test results (post #33): http://www.mini2.com/forum/engine-dr...sel-gtt-2.html

I don't think there is a 'how-to' out there, but his description should help anyone interested in figuring out what to do.

 

Ok read through the whole mess of that NAM thread (take out the vendor bashing and its maybe 8 posts long) and the majority of the MINI2 thread. It seems everybody is purely concerned with HP, which just this one change Tuls proved doesn't do a whole lot. What I'd be more interested to see, is the efiiceny, does it affect IC in temps at all?, (make them lower if it functions to let air intot he SC with less restriction and making the IC do less work) does it eliminate "flat-spots"?, does it affect throttle response? I like the idea of swapping with the MCSa tube just for the fact of beign able to retain the current tube should I find I don't like the results. What wasn't clearly answered before was clearance with the MCSa tubes. I've also got multiple options with CAI to TB tubes should that need to be adjusted.

 

Took a look at it this afternoon, plenty of room; on an 05 MCS MT

 

Another interesting thread on this topic: https://www.northamericanmotoring.co...ad.php?t=54545

And Here: https://www.northamericanmotoring.co...ad.php?t=54837

I'm starting to think there is more to this, and by going to a complete custom tube there may be more significant results at hand.

 

When you say custom, how different to the AGS are you talking about?

Bomboasy