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Old 10-24-2006, 11:31 AM   #1
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Default Couplers

Just bought a '90 with a Greddy kit. It looks like the rubber couplers should be replaced. One is held together with duct tape Should I order these from Greddy or is there a better option?
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Old 10-24-2006, 12:46 PM   #2
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Old 10-24-2006, 06:33 PM   #3
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Thank you. It appears that only Hose Techniques carries the 60mm (2.36") 45 degree coupler that goes from the intake pipe to the turbine inlet. Can larger 2.5" coupler be used and then clamped securely to the pipe and inlet or a smaller 2.25" coupler be forced over the inlet and pipe? Also can a straight piece be used? Thanx!
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Old 10-24-2006, 10:38 PM   #4
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In general, good quality silicone couplers won't be forced over a larger pipe. I can't see why you wouldn't be able to use one that was maybe an 1/8th bigger than the pipe... but you would definitely want T-bolt clamps as the worm types would not be strong enough to seal it. Somebody here may say DON'T DO IT, and get the right size, but I think you'll be OK.

I'm not a Greddy guy, but 2.36" is a pretty funky size. Are you sure about it... are you looking at ID or OD?
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Old 10-24-2006, 11:26 PM   #5
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Just quoting what Greddy tech support told me. That coupler is 60mm which works out to 2.36". I assumed that refered to ID.
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Old 10-24-2006, 11:45 PM   #6
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Do you have a tape-measure? That's just such a funky size. Measure the ID for us.
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Old 10-24-2006, 11:58 PM   #7
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I have all hose techniques couplers and they work just fine. They're cheap in comparison to many others but have held up just fine for me with tbolt clamps.
-Ok just redid my research, Hose Techniques aren't that much cheaper and if you take advantage of WOT's 10% discount ATPturbo would be a good way of doing things.

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Old 10-25-2006, 01:22 AM   #8
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The turbo inlet is indeed a wierd size. I measured mine a while back with dial calipers, and it came to 2.35" OD which is, as has been said, 60mm.

That being said, I'm planning to do some custom fabwork on the intake side, and I've bought a 2.25" to 2.5" coupler which I hope can be made to fit. I'll keep y'all posted.
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Old 10-25-2006, 02:48 AM   #9
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I will measure the couplers and flanges in the morning.
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Old 10-25-2006, 10:25 AM   #10
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I'm using a 2.5" coupler and it clamps down fine. It's close enough.

Depending on the type of silicone a 2.25" might not strech out enough to fit over a 2.35" inlet, especially if it's reinforced silicone.
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Old 10-25-2006, 11:02 AM   #11
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http://roadraceengineering.com/hackertweekerparts.htm

I ***** that link. I love that link.
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Old 10-25-2006, 11:46 AM   #12
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Let me know if I can help you out.
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Old 10-25-2006, 04:50 PM   #13
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Quote:
Originally Posted by Wideopentuning View Post
Let me know if I can help you out.
Thank you all.
Wideopentuning: Can't PM you until I have 3 more posts.
braineak: I may try that. Let me see what Wideopentuning has to say.
While under the hood I found a new problem. A water leak. One of the nipples has coroded through. Small hose that comes out of the bottom of the thermostat housing and connects to a nipple between the block and P/S pump. Going to be a pain to get to.
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Old 10-25-2006, 05:01 PM   #14
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Retail on the 2.5" 45 degree coupler is $38. How about $30 plus shipping?
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Old 10-25-2006, 10:06 PM   #15
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Wideopentuning: I'll get back to you. I want to see if a straight piece will work. Will also need a 2" & 2 3/4" with T-bolts.
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Old 10-25-2006, 11:23 PM   #16
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No problem. Just let me know when you decide what you need an I will put together a nice package deal for ya
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