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Old 12-29-2008, 12:22 AM   #1
speedyHAM
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Smile Up pipe weights

How much does your aftermarket up pipe weigh (please include brand)? I know there is a master weight thread, but it didn't have the information I am looking for.

I am trying to find the lightest up pipe I can. If nothing comes up I am considering cutting the flanges off the stock UP and making my own out of some lightweight steel tubing.

Thanks.
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Old 12-29-2008, 07:27 AM   #2
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Quote:
Originally Posted by speedyHAM View Post
How much does your aftermarket up pipe weigh (please include brand)? I know there is a master weight thread, but it didn't have the information I am looking for.

I am trying to find the lightest up pipe I can. If nothing comes up I am considering cutting the flanges off the stock UP and making my own out of some lightweight steel tubing.

Thanks.
Just keep in mind much of your weight is coming from the thickness of the flanges. This isn't something you're going to be able to skimp on too much. The other concern is heat. Only so thin you can make it.
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Old 12-29-2008, 07:52 AM   #3
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Factory Upipe w/cat 7lbs

Factory Upipe w/o cat 5lbs

Cobb iconel (sp) Upipe w/egt bungs 4lbs

These were weighed on a batroom scale. I should really pick up a better scale.

Those are the only 3 I've ever had so it's all I got a chance to weigh.
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Old 12-29-2008, 09:34 AM   #4
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Quote:
Originally Posted by mccanixx View Post
Cobb iconel (sp) Upipe w/egt bungs 4lbs
^^^^
Spoiled little brat! "oooo, look at me and my iconel.""
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Old 12-29-2008, 09:51 AM   #5
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You can always remove stock heat shielding on your oem up pipe and wrap it.
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Old 12-29-2008, 10:47 AM   #6
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How much does that inconel pipe $? I'd think for the 3lbs, it'd be cheaper to just drive on an empty stomach
A thin-walled steel pipe would be light but wouldn't retain the heat you need.
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Old 12-29-2008, 11:01 AM   #7
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I don't think Cobb makes the pipe anymore. The material got to be just too expensive. The great thing about inconel is its ability to retain heat.
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Old 12-29-2008, 11:02 AM   #8
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a pound of UP weight is ABSOLUTLY INCONSEQUENTIAL

put a quart less gas in the tank
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Old 12-29-2008, 11:43 AM   #9
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Quote:
Originally Posted by Uncle Scotty View Post
a pound of UP weight is ABSOLUTLY INCONSEQUENTIAL

put a quart less gas in the tank
When you are trying to get the car under 2100 lbs with a half tank of gas in it (just enough for two drivers to run a day's worth of autox) every pound counts. I've started looking for ounces at this point.

Also- it's forward of the centerline on a front heavy car, so reducing the weight there will make the overall weight balance better.

Mccanixx- thanks for the info.
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Old 12-29-2008, 12:07 PM   #10
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Sean, did you go bracket removing and hardware chopping already?

as for the uppipe...I'm going through materials in my head..thin inconel, ti of course ($$$), 2024 aluminum handles heat really well (would probably still get too soft though 6061 even works well for catbacks)...um

I'm trying to think of ways you could shorten the manifold all together...
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Old 12-29-2008, 02:16 PM   #11
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Under 2100? WOW!

How about a header instead of an uppipe?
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Old 12-29-2008, 04:34 PM   #12
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Quote:
Originally Posted by PKer View Post
Under 2100? WOW!

How about a header instead of an uppipe?
I'm already going with a Perrin equal length header, since there is both weight savings and power gains to be had with that header over other headers.

Quote:
Originally Posted by Homemade WRX View Post
Sean, did you go bracket removing and hardware chopping already?

as for the uppipe...I'm going through materials in my head..thin inconel, ti of course ($$$), 2024 aluminum handles heat really well (would probably still get too soft though 6061 even works well for catbacks)...um

I'm trying to think of ways you could shorten the manifold all together...
Bracket removing and hardware chopping is pretty much done.

If I end up making my own up pipe I will probably use some 16 gauge steel, maybe 2-1/8" OD with a taper going towards the top to match up nicely with the inlet of the turbo. Aluminum would turn to butter at the temperatures an up pipe sees. Inconel or Ti would be best, but a little out of my welding possibilities right now and very expensive.

Shortening the manifold will come in a few years with the next stage of power from the car. I already have a plan to relocate the turbo, make a fairly short equal length manifold that terminates at a twin scroll turbo with some very short intake plumbing through a FMIC.
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Old 12-29-2008, 07:41 PM   #13
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The very nice APS uppipe was extra heavy ... cast iron ... because you want to retain heat (energy) when driving a Turbo.
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Old 12-29-2008, 08:25 PM   #14
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Because we are pals, I got off my fat ass and took my Crucial Racing pipe upstairs to my digital bath scale that is gnat's ass accurate. Testing it twice in my hand yielded identical 3.6lb weights as it would only register with my weight not the uppipe alone. I'm pleased to admit I'm not as fat as I thought and it's lighter than the OMFG$$$$ Inconel pipe.

My pipe has two studs in it, no more. And....it's for sale. It's got 20k-ish miles and is $75 shipped to your door if'n you wants it.
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Old 12-29-2008, 10:49 PM   #15
speedyHAM
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Quote:
Originally Posted by makofoto View Post
The very nice APS uppipe was extra heavy ... cast iron ... because you want to retain heat (energy) when driving a Turbo.
You get better heat retention with a ceramic coating and thermal wrap than you do with extra thick cast iron. Weighs a hell of a lot less too...

Unabomber- thanks, and you have a PM.
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Old 12-29-2008, 11:34 PM   #16
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Did that with my Downpipe ... JetHot coated:



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Old 12-30-2008, 06:19 AM   #17
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Hi PKer

what is 2100?
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Old 12-30-2008, 07:41 PM   #18
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Quote:
Originally Posted by speedyHAM View Post
...with a half tank of gas in it (just enough for two drivers to run a day's worth of autox) every pound counts. I've started looking for ounces at this point.
OT from the uppipe question, but how about getting a gas container and topping up in grid? I'd guess you could save 20lbs running less gas.
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Old 12-30-2008, 09:00 PM   #19
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Like some of the extra serious STS drivers do at Nationals. You MUST have a fire extinguisher at your side if you're going to refuel in Grid.
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Old 12-30-2008, 10:37 PM   #20
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Quote:
Originally Posted by makofoto View Post
Like some of the extra serious STS drivers do at Nationals. You MUST have a fire extinguisher at your side if you're going to refuel in Grid.
I do this at some events, always with a fire extinguisher ready. There are a lot of events where there just isn't enough time between runs to "top off".
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Old 12-31-2008, 08:24 AM   #21
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Although I think you decided, I found this as well.

http://forums.nasioc.com/forums/show...hlight=pick+up

Quote:
Originally Posted by samrawet View Post
Hi PKer

what is 2100?
I think he was referring to speedy's awesome weight goal for his impreza..........and ya ah hey Seb.
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Old 12-31-2008, 02:27 PM   #22
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Quote:
Originally Posted by samrawet View Post
Hi PKer

what is 2100?
2100lbs is the target weight for the Impreza being built in this thread. I'm impressed, that will be a light Impreza.
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Old 12-31-2008, 02:30 PM   #23
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Quote:
Originally Posted by makofoto View Post
Like some of the extra serious STS drivers do at Nationals. You MUST have a fire extinguisher at your side if you're going to refuel in Grid.
Actually it's only "recommended", but it is a good idea for sure.

What's up Greg..
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Old 12-31-2008, 04:35 PM   #24
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just weighed the gms up pipe, its 3.65 lbs

looks like-



http://forums.nasioc.com/forums/show....php?t=1639549

Last edited by IMPORTIMAGE; 12-31-2008 at 05:57 PM.
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Old 12-31-2008, 05:48 PM   #25
speedyHAM
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Quote:
Originally Posted by mccanixx View Post
Although I think you decided, I found this as well.

http://forums.nasioc.com/forums/show...hlight=pick+up
I had not seen that yet, thanks. Always good to have more information.
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