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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 12-14-2007, 04:09 PM   #1
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Default Internally gated turbo, External gate

I jumped on a used FMIII T25 manifold and downpipe for my 1.6 to replace the greddy. It's externally gated and looks amazingly like the BEGi S5. While I'm scratching my pennies together for a GT2871r, I've got a wee T25 to use for now, a Garrett 2522 .48/.49 #465749-5001. Dyno proven instant spool and 210 whp. It's of course internally gated. Normally, I'd just weld the flapper shut and call it a day, but I don't want to ruin the turbo for resale. So I need to find a new way to hold it shut.

I was thinking of adding a wg actuator and welding the rod stationary to the can (add an L bracket in there if need be). Opinions? Better solutions?
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Old 12-14-2007, 04:12 PM   #2
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On the FMIII FM/Begi used a screw to hold the wastegate shut, on the one I saw it used an internally gated turbo. Friend has an FMIII and wasn't making boost. The screw had backed out.
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Old 12-14-2007, 04:19 PM   #3
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Jay, you mean like a bolt that threads into the flange on the downpipe and contacts the flapper? If so, that's makes things easy, and I wish I had thought of that
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Old 12-14-2007, 04:23 PM   #4
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No. The arm that the actuator usually connects to on the wastegate. Looks like they drilled a small hole next to it and used a sheet metal screw wedged against the arm to hold the arm closed.

If that makes ANY sense. Nice score on the manifold/turbo, I thought you refused to buy anything from FM after your Link disaster?
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Old 12-14-2007, 04:30 PM   #5
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I see.

I gave FM another chance, since the price was right. It came with a Tial gate, which I needed to buy anyway. I can always re-sell it if need be.

Of course, it's been several days and I still haven't received a shipping notification. Hmm....
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Old 12-14-2007, 04:46 PM   #6
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In their defense, I called FM and they said it shipped today.

Oh, FWIW, my shipping estimate when I ordered was $50. I told them I would pay no more than $30. I just looked and they billed my $30.11. Hmm...
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Old 12-14-2007, 05:40 PM   #7
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put a turnbuckle on the WG arm instead of a WG.
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Old 12-14-2007, 05:53 PM   #8
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yeah, that came to me too. might even use some flat stock or something. we'll see what's easiest once it's bolted up, but certainly it shouldn't be too tough.
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Old 12-14-2007, 06:00 PM   #9
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Oh, you took that deal? Looked pretty nice when I sall it.
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Old 12-14-2007, 06:18 PM   #10
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why not remove the external wastegate and get a block off plates for the mean time
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Old 12-14-2007, 06:22 PM   #11
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dammit, I'm not going to downgrade from 250+ to 210 and not use the external gate. If it's going to be weak, I want all the spool I can get. I got some cams too.
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Old 12-14-2007, 07:02 PM   #12
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no i mean a block off while you're on the little turbo...

edit: wait, why not just make sure the external gate's spring is more than the internal
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Old 12-14-2007, 07:08 PM   #13
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I understood. I'm using the Tial. I don't care if it's the harder way. I want my divorced waste gasses.
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Old 12-14-2007, 07:12 PM   #14
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you'll regain their functionaliy with the bigger turbo and no internal gate, but if you must...i don't think it will be worth anything on such a small turbo
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Old 12-14-2007, 07:16 PM   #15
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I must. I don't think I can get a small 2871r without a gate. I'll probably weld that one up. I think that's what Y8s had to do for his 76r.
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Old 12-14-2007, 07:16 PM   #16
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Ben, do yourself a favor and cut the wastegate pipe in half(ish), and then clamp it back together. If you ever need to remove the DP while the turbo/manifold is in the car you'll have a nearly impossible task because of where the external gate is. Cutting it in half will allow you to remove the main section of the DP with out having to **** with the wastegate.
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Old 12-14-2007, 08:41 PM   #17
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A disconnected WG boost source will do what you want there ben the Can will keep it shut well into the 20 psi range or until you get a real non internal WG turbo.
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Old 12-14-2007, 09:13 PM   #18
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the internal gate will probably crack open if left hooked to an operational actuator w/ no signal
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Old 12-15-2007, 12:36 AM   #19
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Quote:
Originally Posted by Ben View Post
In their defense, I called FM and they said it shipped today.

Oh, FWIW, my shipping estimate when I ordered was $50. I told them I would pay no more than $30. I just looked and they billed my $30.11. Hmm...
Start a charge-back for the 0.11 on principle.

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Old 12-15-2007, 10:50 AM   #20
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Quote:
Originally Posted by Ben View Post
IWhile I'm scratching my pennies together for a GT2871r, I've got a wee T25 to use for now, a Garrett 2522 .48/.49 #465749-5001.
You mean a 2871R like this one?





Swapping into my car eventually.

Last edited by soflarick; 12-15-2007 at 11:02 AM.
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