Hard lining wastegate/boost controller?
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Joined: May 2001
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From: Parlor City, NY
Hard lining wastegate/boost controller?
Has anyone one hard lined their wastegate or boost controller? I'm thinking of going in this direction, and wanted to get input and possibly tools and parts list.
Joined: Mar 2001
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From: FL-->NJ/NYC again!
Back in the day at Gotham, a car came in with a fragged motor b/c his w/g and b/c lines were hardlined. They had zero slack/give to them, so one of them eventually cracked, leading to lots o boost and even more detonation
Thread Starter
Joined: May 2001
Posts: 5,031
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From: Parlor City, NY
Joined: Mar 2001
Posts: 30,793
Likes: 646
From: FL-->NJ/NYC again!

--Vincent
I used tube nuts and got new banjo fittings with a -4 instead of the barbed end and used hard lines to get up the side and away from the heat, then used a bubble flare and silicone vacuum line to allow flexing.
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I use AN hose with screw-type hose clamps. yeah it's kind of ghetto (not that noticeable though) but it's faster to install, cheaper than buying all those fittings, and just as reliable.
Joined: Mar 2001
Posts: 30,793
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From: FL-->NJ/NYC again!
Hardlines look great on a show car/trailer queen, but for an FD that actually sees the road and all the accompanying vibrations, bouncing and jouncing that comes with it you definitely need some slack.
Well, I personally know of one very talented track FD guy that melted a few wastegate lines. He wound up hardlining them and the issue went away. For street use, the regular sleeves are probably enough for most people. For all out track usage, a PROPERLY fixtured hard line setup might be beneficial. I would think it would depend on usage and implementation.
I was constantly melting lines on my external wastegate. I switched over to copper lines and they have been working great ever since. Cheap and easy. Braided stainless would be nicer though.
As mentioned, the typical problem with hard lines is that they are rigid enough to vibrate harmonically (like a tuning fork) due to engine vibrations, etc., if not supported properly. Vibration can cause them to crack, usually at the stress concentration caused by fittings. So, IMO, careful attention to mounting or at least some small amount of soft tubing is required at tubing ends, etc., to eliminate this potential problem.
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