Up-pipes
#1
I run a de-catted exhaust on my 99-00 and had further improvements when the manifolds were ported.
I've got the turbo off just now and the std up-pipe looks quite restrictive for flow.
Anyone had any power gains by changing the up-pipe to aftermarket? or quicker spool up of the turbo?
If it's a good thing to change it, what do i go for? any recommendations?
Like the other thread any feedback to help a scoobynut would be helpful
Craig
I've got the turbo off just now and the std up-pipe looks quite restrictive for flow.
Anyone had any power gains by changing the up-pipe to aftermarket? or quicker spool up of the turbo?
If it's a good thing to change it, what do i go for? any recommendations?
Like the other thread any feedback to help a scoobynut would be helpful
Craig
#2
Hi,
I believe the dp to be the most restrictive part of the exhaust system on a standard car. I've heard from a lot of people that the dp alone will let loose quite a few hp:s. Right this second, my car is undergoing a dp swap together with some other bits and pieces. Can't wait to take her out for a drive later on (or tomorrow, depending on how fast the subaru shop works)
Regards
Daniel
I believe the dp to be the most restrictive part of the exhaust system on a standard car. I've heard from a lot of people that the dp alone will let loose quite a few hp:s. Right this second, my car is undergoing a dp swap together with some other bits and pieces. Can't wait to take her out for a drive later on (or tomorrow, depending on how fast the subaru shop works)
Regards
Daniel
#3
Hi Maddog
I fitted a Scoobysport Up-Pipe - the one they sell for the MY01 - to my MY99.
Can' tell you the gains in performance to the original part because I had to swap to a smaller turbo aswell.
The only thing I mentioned was that the sound of the exhaust system has become more "metallic".
And you could fit a EGT Gauge quite easy because theres is already a hole in the Uppipe.
Frank :-)
I fitted a Scoobysport Up-Pipe - the one they sell for the MY01 - to my MY99.
Can' tell you the gains in performance to the original part because I had to swap to a smaller turbo aswell.
The only thing I mentioned was that the sound of the exhaust system has become more "metallic".
And you could fit a EGT Gauge quite easy because theres is already a hole in the Uppipe.
Frank :-)
#5
Scooby Regular
Join Date: Nov 2000
Location: 32 cylinders and many cats
Posts: 18,658
Likes: 0
Received 1 Like
on
1 Post
It looks awful doesn't it!
Thankfully I have sourced a manifold with an uppipe. I have mapped one car with a manifold/uppipe and obviously closed looked at Stephen Done's manifold maps to see how I can beat him The effect over 3000 RPM is dramatic. The uppipe must share a part in this. However, at least we don't have cats in ours like the MY01.
The other issue is gasket leaks because the original uppipe has a flexible joint - MRT do one, but you will be stung on import and carriage if you can actually get them to supply you at all.
Thankfully I have sourced a manifold with an uppipe. I have mapped one car with a manifold/uppipe and obviously closed looked at Stephen Done's manifold maps to see how I can beat him The effect over 3000 RPM is dramatic. The uppipe must share a part in this. However, at least we don't have cats in ours like the MY01.
The other issue is gasket leaks because the original uppipe has a flexible joint - MRT do one, but you will be stung on import and carriage if you can actually get them to supply you at all.
#6
So it's definitely a good thing to do then?
I see Scoobysport sell one as well as MRT. Anyone have thoughts on these?
John
Can't think why the original up-pipe has to be flexible since the turbo and the rest of the exhaust components (mid to rear excluded) have fixed mounting points.
Or am i missing something?
Craig
I see Scoobysport sell one as well as MRT. Anyone have thoughts on these?
John
Can't think why the original up-pipe has to be flexible since the turbo and the rest of the exhaust components (mid to rear excluded) have fixed mounting points.
Or am i missing something?
Craig
#7
Subaru Tuning Specialist
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like
on
1 Post
I fitted a SSport uppipe at the same time as I done another mod (turbo intake) so I can't say exactly how much improvement there was. The gross result was +30bhp and an earlier spool up
This pipe has no expansion piece but is made from annealled stainless. I have had no problems with leakage at joints.
This pipe has no expansion piece but is made from annealled stainless. I have had no problems with leakage at joints.
Trending Topics
#8
Sounds like you need to do both the intake and the up-pipe to get a noticeable result?
+30BHP @ flywheel ....sounds quite a bit of an improvement for not too much work.
What intake do you use Andy?
Craig
+30BHP @ flywheel ....sounds quite a bit of an improvement for not too much work.
What intake do you use Andy?
Craig
#9
Looks like Up-pipes are becoming a FAQ!
Maddog, here's a recent thread about them, Pete Croney explains the expansion joint and why SS one's don't have it....
http://www.scoobynet.co.uk/bbs/threa...hreadid=106032
Maddog, here's a recent thread about them, Pete Croney explains the expansion joint and why SS one's don't have it....
http://www.scoobynet.co.uk/bbs/threa...hreadid=106032
#11
Neal
Thanks for the link, good stuff.
Andy....seems like you've got an awful lot of room under that manifold
Don't think i've got that kind of room to play with under mine
Craig
[Edited by Maddog - 6/27/2002 3:06:43 PM]
Thanks for the link, good stuff.
Andy....seems like you've got an awful lot of room under that manifold
Don't think i've got that kind of room to play with under mine
Craig
[Edited by Maddog - 6/27/2002 3:06:43 PM]
#16
Subaru Tuning Specialist
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like
on
1 Post
" Ceramic spacers?....reduce heat transfer to the inlet manifold? "
Yes, that's their purpose. Really helps for drag racing where you can get a lot of heat soak between runs. Also keeps things cooler town driving, no need to wait on things cooling before giving it thrash
David - Start back 9th July, post out soon as, after that
Yes, that's their purpose. Really helps for drag racing where you can get a lot of heat soak between runs. Also keeps things cooler town driving, no need to wait on things cooling before giving it thrash
David - Start back 9th July, post out soon as, after that
#19
Subaru Tuning Specialist
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like
on
1 Post
The insulating spacers are 'home made' from a section of 10mm plate.
There are a few more tasks to do before front entry will fit.
Remove or relocate power steering.
Re-route fuel lines in flexy pipe (David W has covered this in his FMIC thread)
Re-route coolant pipe.
Re-route breather and idle air pipes.
I previously posted some pics but they were not very good quality.
I'm sure David will be doing the other bits shortly and taking some decent pics You are going front entry David ???????
There are a few more tasks to do before front entry will fit.
Remove or relocate power steering.
Re-route fuel lines in flexy pipe (David W has covered this in his FMIC thread)
Re-route coolant pipe.
Re-route breather and idle air pipes.
I previously posted some pics but they were not very good quality.
I'm sure David will be doing the other bits shortly and taking some decent pics You are going front entry David ???????
#21
Scooby Regular
Join Date: Nov 2001
Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
Posts: 15,239
Likes: 0
Received 1 Like
on
1 Post
five spanners.. and yes I am going to do front entry... just not sure about straight away... will do all prep work first though..
Now wheres that abspestos (sp) gone
Would like to keep power steering aswell.. but as the alternator is in the obvious new home (relocated) May look into a nissan alternator... (I think the cabstar van has the p/steering pump on the back of the alternator...) or may try and find a car with an electric p/steering pump.
Just need to get a cheap knackered td05 now.
which coolant pipe did you move, the radiator top left hose?? the bit of metal tube that bolts to the left hand side of the block and runs under the inlet?
What have you done with breathers? vent to atmos. Rerouted or catch tank
David
[Edited by David_Wallis - 6/28/2002 9:45:18 AM]
Now wheres that abspestos (sp) gone
Would like to keep power steering aswell.. but as the alternator is in the obvious new home (relocated) May look into a nissan alternator... (I think the cabstar van has the p/steering pump on the back of the alternator...) or may try and find a car with an electric p/steering pump.
Just need to get a cheap knackered td05 now.
which coolant pipe did you move, the radiator top left hose?? the bit of metal tube that bolts to the left hand side of the block and runs under the inlet?
What have you done with breathers? vent to atmos. Rerouted or catch tank
David
[Edited by David_Wallis - 6/28/2002 9:45:18 AM]
#22
Subaru Tuning Specialist
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like
on
1 Post
I moved the small bore rigid pipe under the manifold for a bit more clearance.
All 3 breathers I have vented to atmosphere, I put some stainless steel mesh in the vertical sections of the flexy pipes to act as an oil separator. The pipes then lead down to behind the front driveshaft. Never get any oil loss or consumption. Ideally a catch tank would be a more pro' job but ££££s
All 3 breathers I have vented to atmosphere, I put some stainless steel mesh in the vertical sections of the flexy pipes to act as an oil separator. The pipes then lead down to behind the front driveshaft. Never get any oil loss or consumption. Ideally a catch tank would be a more pro' job but ££££s
Thread
Thread Starter
Forum
Replies
Last Post