I saw this over on MR2oc.com. Quite innovative, I can see what he is trying to achieve by reducing back pressure etc. I'm not sure that I would use a system like this but thought I would post up some pics in case it's useful for someone here (racing or top end dyno results etc).

First he starts with a downpipe, gets a cut out and then welds in a secondary section with flange.

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Then enter the badlanzehpe exhaust valve, he has it hooked up so he can turn it on and off from in cabin. :woohoo:

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This is what the downpipe looks like on the car:

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When he goes to the dyno, he flicks the switch and then has the ultimate free flow exhaust for full power. Hope there's earmuffs handy! :blink:

Props to TexasAce for giving this innovative idea a whirl, he has a full thread up here: http://www.mr2oc.com/showthread.php?t=389946

What do you guys think?

Now thats innovation. Clever git.

Ferrari do something similar where they route the exhaust through one muffler or three depending on the engine rpm. That way they get a nice quiet idle and then at 4,000 goes to full song.

Jesus Quandry, weirdest thing! King of all coincidences.

Just home a couple of hours from a site meeting and I have the tv on in the background while I catch up on work emails. There is a documentary on about the history of car modding/ hot rods / speed etc. They started out with the Model T and are working up through the timeline. They got to 1964 and did a piece on the Pontiac GTO, the first ever and original muscle car.

Guess what it had fitted? Yep, apparantly, it was very common in the states in the muscle car era to have a Y pipe with an electronic valve to bypass the exhaust for track and quarter mile. It was as much about the extra noise as it was about the extra performance. You should have heard that GTO rumble and then the EPIC sound when he flicked the switch! HOLY SHIT!! 6.1 litre V8 monster....HAVE to get me a muscle car one day...Really likin this mod.

They are now showing Top fuel drag racers running on Nitro Methane. 0-100MPH! in less than one second. You have to wear a gas mask near the car when the engine is running. You can only floor it for 4.5 seconds and then IT WILL explode. 7000HP, yes 7000. Leaves the start line faster than a space shuttle launch or an F14 leaving a carrier. 5G's at the finish line. Crazy stuff....

great idea a mate of mine runs a apexi muffler in his rx8 he has a full straight thru stupid crazy loud exhaust that really (no joke) sets off alarms he,s been gettin some attention off the law so he got this muffler basically its a butterfly in the exhaust that he controls from the car so when he flicks it the butterfly turns 3/4 in the pipe kills the power but also kills the sound i know its gotten him off a few times already that has to be good

awesome
Imagine the satisfaction of flicking that red toggle switch and putting the foot down

(by the way, flicking the red toggle switch isn't intended as inuendo for anything )

You're full of innuendos Mark!

REDLAD81 wrote:
great idea a mate of mine runs a apexi muffler in his rx8 he has a full straight thru stupid crazy loud exhaust that really (no joke) sets off alarms he,s been gettin some attention off the law so he got this muffler basically its a butterfly in the exhaust that he controls from the car so when he flicks it the butterfly turns 3/4 in the pipe kills the power but also kills the sound i know its gotten him off a few times already that has to be good

I was looking at them a few years back. Decent price for what you get.

Link to Apexi ECV


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That IS pretty good value. hmmmmm

A friend of mine was in the car park at work today when I pulled in. He likened the noise of my car as something similar to "the German Army pulling in to Paris" If I can't get a Legalis I might get one of the Apexi yokes. I wonder can you set them to open at a specific rpm?

i not sure whether ya can set his one its kinda on/off job he has it hidden away because the guards are coppin on to them but really cuts the sound out exhausts are deadly but you know yourselves they make ya look like a bit of a tool tippin round the town and the law really comin down hard on the tints; exhausts etc it the way round it but it kills the engine powerwise

Good vid here by the guy showing testing with a DB meter.

Compares a Berk to a standard exhaust also.

Very interesting

I'm doing the exhaust cutout pending a current barter

Always wanted this, probably one of the coolest mods I can think of

Cool find