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Old 06-13-2007, 06:14 AM   #1
Ole
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Default Glowing turbo and 3psi?

Just installed my Greddy. I tightened up the WG a bit to get rid of the rattle and it spools nice! However, I only het about 3 psi? Any tips?

After a little drag i pulled over and while the car was running i looked at the turbo.. It was glowing! Is it normal that the turbo glows under normal driving?
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Old 06-13-2007, 08:09 AM   #2
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You really should get that check out...! ITS NOT NORMAL!

Are you sure the turbo is getting LUB?Oiled?
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Old 06-13-2007, 08:47 AM   #3
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depends on how much you are retarding timming and overfueling it. the 3 psi could be a leak of some sort check the connections. glowing turbo is no problem tubro glowing and going ping ping ping screeech is bad
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Old 06-13-2007, 09:06 AM   #4
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It's not uncommon for turbos to glow when pushed...but, at 3 PSI, it would seem something is not right.
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Old 06-13-2007, 09:20 AM   #5
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Things sometimes get nearly as hot with too much fuel and not enough timing as they do with too little fuel and too much timing.
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Old 06-13-2007, 09:41 AM   #6
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For the first part, I would suggest you aren't boosting only 3psi with a tightened wastegate rod (most likely not less than 5psi even without a tigthened rod). So I suggest your boost gauge is inaccurate.

A glowing turbo means EGTs are high, do a quick google search as what can cause high EGTs. Improper fueling & timing advance would be my first thought.
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Old 06-13-2007, 11:21 AM   #7
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Plugged cat.
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Old 06-13-2007, 06:58 PM   #8
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I am running vortec pressure regulator from the kit, and 6 degrees on the ignition. manybe i should make it 8 degrees and try? my a/f says stoich almost all the time under wot. and lean for a sec or two at about 4k rpm..
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Old 06-13-2007, 07:02 PM   #9
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I would figure out the culprit in the 3psi issue and then move onto timing.
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Old 06-13-2007, 07:17 PM   #10
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I have a brand new JR BOOST gauge.. can at be broken? :( By the way, i'm not having any cat.
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Old 06-13-2007, 08:38 PM   #11
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Are you using a wideband or narrowband for your air/fuel?
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Old 06-13-2007, 08:43 PM   #12
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Reconfirm your timing. Double check you exhaust for some kind of blockage.
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Old 06-13-2007, 08:45 PM   #13
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Quote:
Originally Posted by Ole View Post
my a/f says stoich almost all the time under wot.
Well, that's not good.

What wideband are you using?



Retarding timing too much is one common factor that can result in a glowing-hot turbo.
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Old 06-13-2007, 08:46 PM   #14
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Quote:
Originally Posted by Ole View Post
By the way, i'm not having any cat.



I don't like cat either.
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Old 06-13-2007, 08:50 PM   #15
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Quote:
Originally Posted by Ole View Post
I am running vortec pressure regulator from the kit, and 6 degrees on the ignition. manybe i should make it 8 degrees and try? my a/f says stoich almost all the time under wot. and lean for a sec or two at about 4k rpm..
Well there's one of your problems...
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Old 06-14-2007, 12:08 AM   #16
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In this thread https://www.miataturbo.net/forums/sh...?t=2995&page=2 you said there was no oil supply hole in your euro block. What did you end up doing? Have you made sure that your turbo is getting oil? I would imagine after a hard run with no oil your turbo would glow...

What octane fuel are you using? It sounds like your fuel/timing are off somewhere. Did you make sure to jump the ten and grd when you adjusted your timing?
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Old 06-14-2007, 01:39 AM   #17
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I think the turbo would fail before a lack of oil caused the turbine to glow from friction.

Have you checked for a boost leak?
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Old 06-14-2007, 01:44 AM   #18
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If the turbo had no oil it would have worn the brass journal bearings alot already and you would have massive shaft play which could lead to the wheels touching the housings which would be very notice able.
I say it's due to you running lean considering you're stoich even under boost.
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Old 06-14-2007, 04:35 AM   #19
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I have only a narrowband.. :( oil is coming from the oil pressure sender.. I set the timing as described in the manual yes.. but i will look at the ignition today, and lower the boost.. and maybe check the mounting of the vortec?
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Old 06-14-2007, 04:43 AM   #20
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My glowing turbo was due to a lack of fuel at 18 psi on a tiny turbo:

http://www.youtube.com/watch?v=HhOSOAJqsdU
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