External Wastegate
07-03-2007, 08:11 AM
#1
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Thread Starter
Join Date: May 2006
Location: Tucson,AZ
Posts: 104
External Wastegate
I just got done searching the forum on an external wastegate setup and how to, but didn't anything, so I'm wondering if anyone knows how to do an external wastegate on the Turbo L28. I have a T3/T4 Turbo on right now. Which one is a good one? What is needed to do this external wasategate? Thanks.
07-03-2007, 08:23 AM
#2
Lifegrddude has an external wastegate. There are a couple ways to do it.
#1... Take a plazma cutter to the stock exhaust manifold & cut a hole to weld on the wastegate pipe.
#2... Make a "manifold to turbo" adapter that's about 2" thick & cut a hole in the bottom for the wastegate pipe.
#3... Make your own exhaust manifold runners & collector, with a wastegate pipe.
#1... Take a plazma cutter to the stock exhaust manifold & cut a hole to weld on the wastegate pipe.
#2... Make a "manifold to turbo" adapter that's about 2" thick & cut a hole in the bottom for the wastegate pipe.
#3... Make your own exhaust manifold runners & collector, with a wastegate pipe.
07-03-2007, 09:50 AM
#6
07-03-2007, 10:37 AM
#11
Originally Posted by Nemesis280zx
Where does the other libe run to from the wastegate, back to the exhaust? Where?
There's lots of info on the web about internal / external wastegates & which should be used for a specific motor. Also, you should read the book "MAXIMUM BOOST."
07-03-2007, 10:53 AM
#12
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Join Date: Mar 2003
Location: WA
Posts: 373
Originally Posted by NismoPick
^^^ Nice! You have an external don't ya Veyenyl?
An open wastegate dump sounds like a wild banshee at full boost
07-03-2007, 11:22 AM
#13
Externally Wastegated
Join Date: Oct 2001
Location: San Diego
Posts: 1,220
Hi, yes I'm using an external wastegate. It's mounted on the #6 runner of the manifold which isn't optimal, but I didn't buy a prefabbed spacer for the wastegate at the collector, and I didn't have lots of clearance with the steering. Not to mention trying to route a pipe away from the rubber boots of the tension rods. (I would have if I'd been allowed to weld, but I can't in this neighborhood) If I could do it over, I'd mount it at the collector. As long as you're not getting boost creep or unstable boost, an internal is fine because an external gate that's vented is friggin loud. Don't vent it next to a concrete median divider with the window down, your ears will thank you. 
07-03-2007, 12:21 PM
#15
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Join Date: Dec 2004
Posts: 777
Tomorow Im going to take some picures of the progress on my car, I will post some pictures of my external wastegate setup, its mounted between runner 4-5, im in the process of fabricating the dump pipe but everything else is finished
07-03-2007, 05:01 PM
#16
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Join Date: May 2006
Location: Tucson,AZ
Posts: 104
Cool thanks, has it been easy doing it for you? I will be swapping my motor into the 280Z maybe next weekend, if not for sure the following. I was thinking about doing this external wastegate while the motor is out. I will be Mega Squirting it too with the swap.
07-04-2007, 01:58 AM
#17
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Join Date: Aug 2004
Location: Bay Area, CA
Posts: 1,075
Originally Posted by NismoPick
Yeah, it just needs to bypass the turbocharger. Usually it's run back into the downpipe. Lifegrddude has his dumping to the atmosphere... which is loud at full boost.
07-04-2007, 07:13 AM
#19
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Join Date: Dec 2004
Posts: 777
Originally Posted by Nemesis280zx
Cool thanks, has it been easy doing it for you? I will be swapping my motor into the 280Z maybe next weekend, if not for sure the following. I was thinking about doing this external wastegate while the motor is out. I will be Mega Squirting it too with the swap.
Originally Posted by Heat Rave R
Is there any negative downside to venting to atmosphere (like how a BOV venting to atmosphere messes with the A/F)?
07-04-2007, 04:09 PM
#25
Originally Posted by snwbrderphat540
lol, im used to my friends DSM i think its more like a 60mm or somethin around there, and those tial BOV are huge
