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Do you think Iíll pick up power by doing this?

 
Old 05-10-2019, 11:11 AM
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Default Do you think Iíll pick up power by doing this?

When I built my turbo setup I had to cheap out on some stuff. One thing was the downpipe. I used a 3Ē pipe that I had to ďmassageĒ with a BFH (big frigging hammer) and smashed it to about 2Ē. Oval pipe was out of budget at the time. But since then Iíve been collecting parts to do a better downpipe. I ended up getting Cx racing stainless 3.5Ē oval. Do you guys think Iíll pick up and power or spool faster after I build this downpipe? I need so motivation lol.


Heres what I have:






and hereís what Iím gonna use



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Old 05-10-2019, 11:32 AM
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If its really 2 inches you probably will pick up power. That said.....I love this video about NA.
https://www.dailymotion.com/video/x3vupq0
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Old 05-10-2019, 12:05 PM
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Originally Posted by ddnspider View Post
If its really 2 inches you probably will pick up power. That said.....I love this video about NA.
https://www.dailymotion.com/video/x3vupq0

Yea I watched that before. Was really surprised. I figured flow right out the turbo is pretty important and I did what I had to do at the time to get it to work. I always knew in the back of my mind that Iíll end up doing it right or better later on.
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Old 05-15-2019, 09:18 AM
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i mean is backpressure really needed when turbo? im running maybe 2 feet of exhaust out the fender lol im j.w. not bashing or anything not wondering actually more like asking...
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Old 05-15-2019, 09:29 AM
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Backpressure is more important on a turbo. People have picked up 30-50whp with just a cutout at the same boost.
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Old 05-15-2019, 09:47 AM
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So what would be the minimum needed? i was going to do a 3" from the turbo out the fender or hood
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Old 05-15-2019, 09:58 AM
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Depends on multiple things like c.i., turbo size, pressure ratio, etc. Short distances of piping have less backpressure than a full over-axle exhaust. I had a 3 inch downpipe to a 3.5" over axle with a huge magnaflow muffler and picked up 30whp at the same boost when opening a cutout off the downpipe.
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Old 05-15-2019, 10:00 AM
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yeahhh....over axle exhaust isnt much of a choice in my setup. sooo....im outtt! haha thanks tho!
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Old 05-21-2019, 05:59 PM
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well I answered my own question. I build the pipe a couple weekends ago. Post pics shortly.

Yes It feels like it picked up power, I even had to retune for it.
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Old 05-21-2019, 06:04 PM
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I posted this in my build thread too. Pics.







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Old 05-21-2019, 07:29 PM
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Did you tig all this? Welds look a lot better than the first pipe . I bought a tig welder but haven’t welded anything but thin sheet metal . Dying to try some stainless
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Old 05-21-2019, 10:50 PM
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Originally Posted by jimmyg View Post
Did you tig all this? Welds look a lot better than the first pipe . I bought a tig welder but havenít welded anything but thin sheet metal . Dying to try some stainless

Thx. Yes I tigged it. Iím getting better and they looked really good in some spots. Some spots didnít look as good because I blew threw due to small gaps in the fitment or I veered a little off course. I really need a better hood but canít really afford what I need to get, I donít weld quite enough to justify it.

Btw, after I got this tig machine, I sold my Lincoln mig and Lincoln stick welders. Cheap. $100 each. Lol. Iím dumb.
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Old 05-22-2019, 02:50 AM
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Originally Posted by panda240ss View Post
i mean is backpressure really needed when turbo? im running maybe 2 feet of exhaust out the fender lol im j.w. not bashing or anything not wondering actually more like asking...
I don't think people understood your question. Backpressure is absolutely NEVER needed in an exhaust system. This is an old myth.
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Old 05-22-2019, 01:05 PM
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Originally Posted by jimmyg View Post
Did you tig all this? Welds look a lot better than the first pipe . I bought a tig welder but havenít welded anything but thin sheet metal . Dying to try some stainless

stainless is really easy. I usually fuse it together so i try to make everything fit nice and flush with each other. some people will disagree with the fusing, but I dont care.

1) Ive never had a weld fail because of it
2) I have a welder....so if it does fail...you guessed it....I'll weld it back up!
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