fiestaturbo.com

[bcracknell]

I'm after getting a custom exhaust made from someone like longlife etc.

Now I have a 2" scorpion at the moment and am told it's resticting exhaust gas flow cos it's too small.
the new options are 2 1/2" bore or 3" bore....what's the best one to go for?
I've heard I'll loose torque with a 3"

[AdrianFRST]

Go for as big a bore as will fit.

Back pressure on a turbo = bad, you only need to be careful with bore sizes on an NA engine.

[AdrianFRST]

3" should be plenty though, anything bigger than a 3" won't offer much of an advantage compared to the fitting hassle and cost.

[MOONDUST FRST]

3" all the way mate i was told by ahmed bayjoo and ian howell that it would be fine so i took there word for it and my car hasnt lost any power if anything its gained

[GavStyli]

Most people go for a mongoose, or a quiet magnex if your an old git like me

[bcracknell]

3" it is then....just hope its not TOO load as I still want to be able to get on track at castle combe, silverstone, goodwood etc..

anyone heard anything good/bad about longlife exhausts? or any other suggestions? nowhere too north of London though please

[TJ]

You may have problems getting longlife to make a 3" one, my mate wanted one, and they said they couldnt do it, and it wasnt worth it anyway, i had a go saying yes it was because of the back pressure, then they went off and said ok, but it'll cost more.

[MOONDUST FRST]

I do know powerflow cant do 3" as they cant bend that size as i asked

[bcracknell]

Longlife have said a 3" is too big - no mid range torque but what do they know, but they said they would do one for £399......are they any good though? dont want to shell out £399 and find out its not very good.

[Jur]

A bigger exhaust causes the turbo to spin up more rapidly (the Scoobies etc.. don't have like baloon shaped downpipes for nothing), due to lesser back pressure.. giving you power at a lower RPM..

So i guess a 3" would do well..
But..
make sure the bends of the downpipe aren't like a T2 mongoose .. or you will scrape it for sure on the first speedbump you will meet..

A friend of mine already managed to have to replace his due to this.. and his FRST wasn't even lowered..

I myself have a Magnex exhaust.. sounds nice.. (the 4" backbox isn't made anymore at magnex so i have a 3")

The standard T3 downpipe almost fits perfectly (had to cut of the flange and extend it with just 4" )
")

[MadcatCraig]

most FRST systems are 2.5"

no one made a 3" off the shelf system as std

my mongoose is 2.5

[Jur]

So if you want a 3" system you have to let them make a 3" system starting with the downpipe ..

Inox has one dis-advantage ... it doesn't spread the heat easily.
So the heat will build up in the exhaust manifold, turbo and downpipe..

To prevent the exhaust manifold/turbo form cracking.. make sure they make a good and fixed downpipe support (to your gearbox) ..

In this way the exhaust and turbo aren't hanging on the exhaust manifold.. but the downpipe supports te turbo .. and thus releaving the exhaust manifold from stress.. thus.. not cracking that fast ..

[TJ]

Ive got a longlife, and ive got no complaints!

On the fez or on the Gti!

And fezzymk3.5 got one two!

[MOONDUST FRST]

Inox has one dis-advantage ... it doesn't spread the heat easily.
So the heat will build up in the exhaust manifold, turbo and downpipe..

If thats correct then just use something like themotec heatwrap for the manifold and tubby like i have which helps to disperse the hot gasses faster.

http://www.thermotec.com

[Mexi]

Stealth systems in Southampton are good

[TJ]

I will recommend longlife, but looking at this work, i think its worth the trip up there!!
No bends in the metal, simple welds!!

http://www.fiestaturbo.com/phpBB/viewto ... ht=tube%2A

Looks awesome too!

[Jur]

Inox has one dis-advantage ... it doesn't spread the heat easily.
So the heat will build up in the exhaust manifold, turbo and downpipe..

If thats correct then just use something like themotec heatwrap for the manifold and tubby like i have which helps to disperse the hot gasses faster.

http://www.thermotec.com

This wrap is used to INSULATE in stead of disperse the heat.. so you get even MORE builtup of heat..... but it doesn't cool off that fast..

The steel/cast iron can therefor disperse the stress better.. and will not crack that fast .. ..

But..
why spend plenty of money.. when a sollution of 30 min work.. and 10 quid of material will have the same benifit (the preventing of cracking)

[SWZS]

On a slightly different note, I have got a zs and now want to get a cat back exhaust, but will i see any advantages of a proper hand made system, made from small welded sections as opposed to a powerflow, long pipe piep, which will have kinks etc. And the company that does the hand made ones, they use mild steel and ss, i have heard mild is a nicer note than ss, but any other differences, i know ss wont rust.
Is it also worth upping the bore slighlty, I know you shouldnt have a large bore on n/a engines but there must be an optimum size, as i plan to fit cams, nos maybe TBs.

Any advice is welcomed

Dan

[TJ]

Probably not worth the bigger bore.

Dont trust powerflow!

[SWZS]

Surely Powerflow and Longlife are one and the same, i.e the way they make their exhausts ? and it must be more down to each specific dealer/garage ?

Why you say dont trust them TJ ?

Pricewise, Powerflow 200-250 for cat bak
Handmade, 280 mild and 380+ ss

Its a lot of money, what will the gains be like for both, I know the quality will differ greatly !!

Dan

[TJ]

Surely Powerflow and Longlife are one and the same, i.e the way they make their exhausts ? and it must be more down to each specific dealer/garage ?

Why you say dont trust them TJ ?

Pricewise, Powerflow 200-250 for cat bak
Handmade, 280 mild and 380+ ss

Its a lot of money, what will the gains be like for both, I know the quality will differ greatly !!

Dan

Ive just heard so much bad stuff about powerflow!

At the end of the day, you pay for what you get. I know id rather pay the extra and get a quality system. And ive spent out enough on exhausts!