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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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05-15-2008, 01:07 PM | #1 |
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Turbo Flange Gaskets (T25/28/3/4/whatever)
So I've been talking with a buddy of mine that has blown his fair share of T25 gaskets (turbo flange to manifold). I blew mine last night (also T25) when I turned the boost up and went to the mountain. Ugh... ghey. He told me about these guys:
http://www.remflex.com/index.htm Seems like a good idea, but I'm not convinced. There's also the stainless gasket, and I also noticed Cometic makes a gasket as well. Stainless Cometic A good friend of mine that's had numerous 5-600+ whp cars always uses copper RTV and has good luck. The other side of that, is an actual copper gasket. I've seen them on eGay, but I'd probably get a sheet of copper and cut out my own. Other option is this stuff I saw some time ago on JGS Turbo's site. It's Rutland 77 Stove and Gasket Cement. Good to 2000*. Made for stove gaskets and also metal to metal repairs up to like, 1/16 or 1/8 of an inch. Obviously, that would depend on pressure, and for it, or copper RTV to work, it would have to be thin. Thoughts? What have you guys had good luck with? I had the mani flange leveled before putting it on, and I would hope the cast turbo flange is level, but I may check it just for shiggles.
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05-15-2008, 01:27 PM | #3 | |
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Quote:
I have a SSAC Manifold (I know, I know...) and a stock T25. I've also heard I need to get the mount from the DP to the transmission connected to cut down on vibrations and movement...
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05-15-2008, 01:32 PM | #4 |
Leaky Injector
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Im running it on a stroked Rb25 Stock Cast manifold an t28 turbine. No problems for 2 years.
Now my buddy uses the same copper stuff on his mustang. 302sbf turbo charged. 10psi 597RWHP. He runs the shit out the car too. Never had a leak. Were buddies from the track. He runs 6.80's @ 115mph in the 1/8th mile. |
05-15-2008, 01:48 PM | #6 |
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Hmmm, interesting. Anyone else have any input? I was thinking about ordering an S15 7 layer metal gasket for the mani/head flange.
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05-15-2008, 02:10 PM | #7 |
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People blow the factory gaskets a lot? The metal ones? I had no idea
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05-15-2008, 02:16 PM | #8 |
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No, I don't think they do generally. And I don't know that mine is for sure blown. A stud may have backed out of the manifold. I don't know. I'm planning on welding the backside of them when the mani is out this time I think.
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05-15-2008, 02:33 PM | #10 |
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05-15-2008, 02:39 PM | #11 |
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I'm thinking about going this route, but I'll have to let the gaskets dry fully before firing up the car, since the last time I used this stuff, I blew the copper out everywhere after letting it dry for like an hour only lol
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05-16-2008, 07:59 AM | #13 |
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Ok, so I looked into the Ultra Copper. It's only good to 700*... Exhaust gases are a good bit hotter than that if you're doing anything more than driving Miss Daisy... I wouldn't think that would hold up very well... *shrugs*
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05-16-2008, 08:11 AM | #14 |
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OEM metal one off a Z31.
stock metal tab things to keep the nuts from backing off copper spray on the gasket. done and done.
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05-16-2008, 08:52 AM | #18 |
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Ok, yea, I'm sure the info is on here somewhere, but I would trust the OEM one personally.
Give Brian at MA a call, see what he says. The setup I have in my motor with the GT28rs I'm pretty sure is a stock gasket, just use a new one, sinch it down well, tack welt the studs in your manifold, and use the locking tab things from nissan.
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05-16-2008, 09:15 AM | #19 |
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Ive used the rutland stove gasket and its awesome. It hardens as you cure it by heating it. I dont know if the permatex copper stuff hardens but this stuff gets pretty stiff. I have some applied between my turbo and manifold, turbo and downpipe, and various exhaust connections and there arent any leaks. Plus this stuff is rated for 2000*F when the permatex copper is rated for 700* intermittent, which means it cant stand 700* continously. Kinda like how speakers have RMS values and the ultra cool 1000W value. Ok, enough.
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05-16-2008, 09:47 AM | #20 | |
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Quote:
Also, what manifold are you using? Cast, or stainless?
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05-20-2008, 07:40 PM | #21 |
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No gasket, straight up metal to metal. As long as your flanges are relatively flat, you should be fine. Im using a mild steel log manifold and whatever the turbos made out of...cast iron?? But yea, just run a bead, tighten, wait a bit, and then heat it.
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05-20-2008, 10:36 PM | #22 |
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How tight did you torque them down? Im also considering the stock gasket with spray copper on both sides of it. I really don't know what to do. I just don't wanna have to do it again.
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05-16-2008, 11:40 AM | #23 |
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Anybody remember super tuner tv... that show use to come on sat mornings on what is now spike tv. They had the twins who's last name starts with K, think they own/run Twins Turbo. They were doing a turbo upgrade on some euro I think it was, and they used some sorta orangish looking paste (maybe rtv), anyone have an idea what I'm talking about? I mean if it's good enough, maybe u can use that. If only I knew what it's called. Think they just smeared it on around the flange.
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05-16-2008, 11:47 AM | #24 |
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I have used the stainless one and that shit did not seal completely. The i used a cosmetic and it blew up once i turned up the boost, so then i ordered the OEM one and I've been good ever since.
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05-16-2008, 11:51 AM | #25 | |
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Quote:
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05-16-2008, 12:27 PM | #26 | |
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Quote:
that works, some of my buddies who road race motorcycles do that b/c vibration backs off the nut, but if the gasket blows itll be more of a pain to replace
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05-16-2008, 12:35 PM | #27 | |
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Yeah. I don't know 100% that the gasket actually blew. And if it did, it could have been because something has started to back out. I haven't pulled it apart yet, because I kinda want to get everything here so I can pull/replace/redo all at one time and have as little downtime as possible.
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05-16-2008, 12:17 PM | #28 |
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^sorry but that sounds so "un" needed. There's a reason why nissan used this gasket for their cars. reliability, they didn't just pick one and say "here it's cheap lets use it!" Reliability was factor and i would go oem on most things when replacing because of reliability.
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05-16-2008, 12:49 PM | #30 |
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Feel free to post a link, since after all, that's what this thread is for...
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