exhaust sizes
Turbo Mini Forums

just wondered what size systems people were running. driving back from mitp mine started to sound rather throaty. i have a 1 3/4 maniflow twin box system and i'm thinking its too restrictive and i've left my baffles on the m1 somewhere.

when you revved it before, the pipe would force the air out quite a bit behind the car.

playmini sounds likely if it is.

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

Most will recomend the maniflow. As far as im aware they are the only manufacturer to specificaly produce a back box for the turbo. It has a 2" bore

I have a Playmini on mine at the minute and the bore on that is 2" so i might stick with that when i sort any one of the turbo engines out and get round to building them nver mind fitting them. LOL

that just a 2" back box or a system???

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

system

Mine has a 2 1/4 tail pipe, and i cut two inches off it including the rolled end. just a plain pipe.

Edited by Sprocket on 22nd Aug, 2006.

right. might get the boroscope kit from work and shove it up its arse to double check. cheers dude, appreciate your help

stu

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

i ran a maniflow 2" system and it strangled the motor to death

a 6 foot swirl was seen at the back of the car on full boost

anyway i designed my own back box and here you have it below

straight through!!!!!!!

2" inlet 2.5" centre 3" exit

NOW! this does the trick, no middle box and its great sounding

sounds like a world war 2 spitfire

This may be a daft question lol, but if the inlet into the box is only 2", what benefit does a 3" tailpipe have ?

Phil.

WWW.TURBO-MINI.COM

looks cool :) got a 3.5" outward rolled on mine

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

jesus. looks nice that tho

balls to the blower!!!



1330,stage3 head, gt1549, canems ecu, S/C box and drops

not a daft question phil
I can see your reasoning on this one,

like it will only flow to the smallest diameter (usually) YES!

this 2.5" internal and 3.5" exit stops the swirling effect as the progressive larger diameter aids flow on high boost,

“there is no sound deadening material in the box”!

in a 2” system with the box baffled & sound deadening material encased, say a maniflow or playmini exhaust
these ehausts “creates eddies sapping flow”

I call this my taliban rocket launcher

the power diffrence between a 2" maniflow back box and this one
is STAGGERING!

And as you suggested so is the noise difference

LOL

Looks realy good though :cool:

i run a 2.5 inch turbo muffler from heddman headers .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

N/A rather than turbo'd - running 2 1/4 straight through to 2 1/4 Ti bike silencer - fruity!

If Carling made Mini engines
it would probably be like this one!

am i the only one who wants benross to upload a audio file of his monster exhaust of unholiness?

Project - 998 turbo

No i would love to hear it, just wonder if it would pass the db levels at some track day venues

http://www.turbominis.co.uk/_videos/mini2%20bypass_new.mpg

it doesnt work on my pc mate!
it says i need to download mpg2 or somthing but iv tried to find it before with no joy!

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

right click on the link and save as to a file on your pc then play

it sounds a pussy cat on the mpeg which was filmed last year but you get the idea!

only..... 10psi boost

wont work for me either.
codec download failed.
saved it to desktop, the same.

Project - 998 turbo

Worked fine for me! Update your windows media player chaps!

Any ideas for an exhaust spec for my 998 turbo based on 8psi initially, i have a maniflow centre exit single silencer 1.75" system at the moment, cheers,
benross that exhaust looks really good to me, loud for a turbo i'm sure & heres me thinkin a turbo mini is quieter hehe!

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

oh yeah benross was it your yellow mini i seen in the carpark nxt to the exit road, vents in the bonnet?

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

Will an RC40 strangle a turbo engine if it's a single box only?

Andy

ive got a maniflow 2 box silencer on mine its all they had instock at the time i needed one that would fit me downpipe. think it 2 inch. its not noisey and i like that.

if anyones planning on doing track days i wouldnt get a exhaust thats to noisey as they might not let you on the track i know combe check exhaust dBs.

no longer a series, but still 1.3 turbo.

Sounds awesome ha ha, wouldnt there be a slight pressure drop if a larger tailpipe is used or is this negligible, i'm sure someone ran with no boxes at all, just a pipe sticking out, wasnt too loud either.