Implications of dropping from 2 1/4" to 2" exhaust diameter

[EDGE]

Guys.. just a quikie...

what are the implications engineering and performance wise of going from 2 1/4" exhaust down to 2" for around 12" of the exhaust system...

the whole exhaust on the trofeo is 2 1/4" but i need to put something inline thats only 2", but its only about a foot long basically... so I'll have to use reducers either side of it to smooth the flow...

not ideal i know, and I KNOW I should't do it... but will it have dire consequences ?

EDGE

[EDGE]

doh.... someone take this out of "general news and announcements" please....

[55starchief]

do you need a length of 2 1/4"? as i can make the call

[55starchief]

call made and yup he has it on the shelf and a couple of foot would be under  £10

[EDGE]

hmmm.... that's not bad at all... has he got the double sleves that fit over the 2 1/4 inch pipe, to join 2 bits together... and the clamps ?

i need about a metre of the pipe..

[55starchief]

here give them a call and tell them what you want

http://www.gds-exhausts.com/\" target=\"_blank\" rel=\"nofollow\">http://www.gds-exhausts.com/

01280-702510

[sixpack2639]

Quoting: EDGE

what are the implications engineering and performance wise of going from 2 1/4" exhaust down to 2" for around 12" of the exhaust system...

I could give you all the technical jargon about what it will do but suffice it to say -20 bhp give or take a couple.

[EDGE]

cheers dude.. i just called them and got the prices, theyre fairly cheap.. however, its actually cheaper for me to get it locally rather than pay the courier costs... typical....

chers though dude... much appreciated...

I just guess I wont be etting a cut out system on the olds

EDGE

[55starchief]

Quoting: EDGE

cheers dude.. i just called them and got the prices, theyre fairly cheap.. however, its actually cheaper for me to get it locally rather than pay the courier costs... typical....

er matey i can pick it up as its like next door to me then you can collect it from me at our next meet our your next meet etc

[EDGE]

that true... but i was after fixing the noisy fooking thing this weekend

We'll see how it goes, rhanks for the offer dude... i need to find out if the pipe on the car is 2 1.4" inside OR outside diameter... I think its inside.. but i need to check with the calipers....

EDGE

[Pod]

Quoting: EDGE

i need to put something inline thats only 2"

What's this then?

[EDGE]

lol... the cut out...

[EDGE]

... only available to suit 2" outside diameter pipes

EDGE

[Pod]

If it only comes in smaller size pipe, then it doesn't make much sense to fit it. It will be slower even with the cut out open, as the pipe is smaller. Close the cutout and it will be slower still *and* quiet.

[EDGE]

well.. it wont be slower going from a 2 1/4 to a 2, especialy seeing as youre venting gas quicker, the decreased diameter may even cause the gas velocity increase to decrease the pumping losses of the engine... but with it shut it may have an effect..... i just thought it'd be kinda cool.... im not doing it now anyways....

quietish exhaust FTW !!!!11111one

[Finlay]

Edge Ive got a pair of Flowtech race readys in stock that are 2 1/2" OD

these are normal steel. And brand new.
Got to say the build quality is strong & good enough but a bit rough.

£40 delivered to you


There is a Guy on v8hotrod.com selling electric cutouts  for £95 each (if I remember correct)

Cheers
Fin

[Finlay]

The Cut outs on V8hotrod.com do not fit the Flowtech Trace readys....

BUT

I may have some big news very soon about Electric Cutouts and Y pipes...

The Dynoflow range is about to get bigger!!! AND LOUDER THAT EVER

I'll let you know what is to happen.

[Finlay]

The Cut outs on V8hotrod.com do not fit the Flowtech Trace readys....

BUT

I may have some big news very soon about Electric Cutouts and Y pipes...

The Dynoflow range is about to get bigger!!! AND LOUDER THAT EVER

I'll let you know what is to happen.

[Finlay]

Corr double post thingy

That wil get my post count up