Dave T-S

NO

[Edited by Dave T-S - 6/5/2002 3:01:07 PM]

UkLegacyT

as above, has the standard up-pipe (from manifold to turbo) got a sleeve welded inside it?

any ideas, any piccies?

thanks, ian

Dave T-S

On an Impreza, yes. It's an expansion joint, and why it is worth thinking why did Subaru go to the time and trouble of fitting it when changing to a solid pipe.

The only exception is the MY01/2 WRX that has a cat in the up pipe and no expansion joint.

UkLegacyT

cheers dave

David_Wallis

I think Im going to make my own of these but put some sort of expansion part in it... Are the scoobysport ones sleeved??

David

David_Wallis

hmm... cunning plan coming up..

David

ustolemyname??stevieturbo

iTrader: (1)

The more restrictive the system is, the more its likely to heat up?. Is expansion at this point really going to cause that many problems? I dont believe it will expand that much. I recently fitted the HKS GT Ball bearing turbo kit to a friends legacy, and it comes with a new up-pipe, which is constructed of fairly substantial bit of pipe. Approx 2" dia, but about 4mm wall thickness steel, with no expansion joint at all built in. If someone can tell me how to post pics here, I will...

David_Wallis

use http://www.aviz.co.uk/imagepost/

And follow the instructions...

Pretty simple once you know how!

David

Dave T-S

Stevie

Our brand new STi7 blew the bottom up pipe gasket (triple layer laminated steel) in less than 2500 miles with a solid replacement up pipe. There have been other up pipe gasket failures reported.

My theory (IMHO) is that because the replacement pipe has a bend in it, when it heats up (EGT temps here probably about 800-900 degrees C) it is not just trying to move end to end but trying to straighten out and is moving the flanges thus causing the gasket blows.

ustolemyname??stevieturbo

iTrader: (1)

First time I tried, it said file too big..it was only 122k?? Anyway, How does this look?

David_Wallis

Jan Shim

Here are pics of my '98 WRX up-pipe with the heatshield removed. Many were surprised to find a flexi joint in the the factory up-pipe. Mine sprung a leak where the arrow is pointed resulting in an almost untraceable loud hissing and rattling on boost.

dowser

Jan,

That is one ugly/restrictive up-pipe Has anyone found a decent replacement with expansion joint?

Richard

Dave T-S

Dowser

Yep - MRT. From the land of OZ, where all the best tuning bits seem to come from

Stevie
It looks good, but I bet it will lead to bottom up pipe gaskets blowing

[Edited by Dave T-S - 6/6/2002 8:50:03 AM]

Dave T-S

Here's the MRT up pipe....

David_Wallis

Bugger... thats what mine was going to look like, using part of a old style... rover 200 exhaust

Looks like the heat shield met a cutting torch

David

Floyd

iTrader: (9)

Oh god, somebody shoot me! I've just caught myself thinking that the MRT up-pipe looks like a fine piece of kit and I'd like to fondle it in my hands....

F
PS how much?

UkLegacyT

stevie, thats a cool looking up-pipe mate, oh and the turbo doesnt look to bad either

Jan, what a crappy pipe eh
think ill get a PE or scoobysport up-pipe if i dont make one myself.

thanks to all for the replies, ian

David_Wallis

Ian,

Make one yourself... you know you want to... Im going to make mine... just need to get around to taking the downpipe off....

David

UkLegacyT

david, i might just make one yes, saves spending 100 quid ish on a replacement one eh
ive got the steel in the garage for the flanges, just need to find some tubing, im guessing a 3mm wall thickness or something?
as its only slight bends, i may just cut and weld rather than try and bend it.

cheers

hey, get back in the garage

Dave T-S

I'm all for DIY, but just be very careful - if you don't get the flanges at *exactly* the right angles, you will almost certainly end up blowing gaskets.

Suspect you will end up using more then £100 or so of your time though

David_Wallis

Nah... I earn a pittance so its ok... I was just going to hack the standard one up then get and exhaust company Ie power flow to bend me the tube... then fit it all together on the car and tack it together... but there should be more tollerance if I use a flexy joint...

I wouldnt cut and weld, mind you depends what you weld with... its just A case of how flat the weld sits...

David

ustolemyname??stevieturbo

iTrader: (1)

Making a subaru up-pipe...easy peasy. With a little time and patience, and a big angle grinder of course you can make anything... Knowing my luck, it will blow out all over the place..

UkLegacyT

What the hell is that head mate?

Hoppy

STi7 PPP

Dave T-S

I would guess half a Rover V8

David_Wallis

That was my guess... Looks like a bird **** on your exhaust manifold though.... Only kidding...

Does actually look quite nice in a wierd way.... well I apreciate how much work has gone into that anyway...

David

flat4

is this flexi joint the same as the one in the manifold (restrictiveness wise)?


kev

dowser

Dave,

I'd qualify that statement.... 'half a Rover V8 destined for a very small car'

Richard

Cosie Convert

Ooooh, bit late with this pic ! A lot happens when you holiday for 2 weeks !

Scoobysport V Std uppipe. Note small diameter pipe inside expansion bellows.

I found that fitting this totally changed the response of the turbo. It seemed to spool slower but earlier Yea that sounds odd but it (TD05) would produce full boost at a low 2500 rpm in 5th
but seemed to 'feel' laggier. I can only suggest that the bigger pipe lost some of the pulse energy but dropped less pressure ??

Once on high boost, there was more power for same boost pressure.