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Old 02-15-2009, 12:22 PM   #1
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Default Need help searching Greddy improvements

I have tried to search for a few things about Greddy turbos, and even with advanced search options, the number of responses make it hard to find anything useful. It is ok if this thread turns into how to do the things I am looking for, but almost every time someone asks a question there are many replies of "USE SEARCH!". I can understand why people just post the questions as searches often are useless due to the number of non related threads. I would like to know what keywords you use, and what advanced options you use for searches.

So the things I would like to know;

I want to remove the flapper for the waste gate, as I want to perhaps put in a bushing to take out play, (its a bit loose and I fear it will not only leak out but leak air in upsetting the wideband numbers)I want to put the flapper back in, so I dont want to destroy it. I am wanting to ceramic coat the housing, so removal of the shaft is also necessary for that.

Before I send out the housing, I would like to port the wastegate passage, and would like to know if there are other improvements I can make to either housing.

I am also looking for threads where people have replaced the bushing, and if there are better options for the bushing and seals etc.

I have seen threads on upgrading the wheels, but cant find that info searching. Are there places I can buy these or is this a black art that the turbo has to be sent to a specialist?

Again, please show me how to search and get good results first, and offer up answers if you want. I would hope a thread like this will be useful to others, when they attempt to use the search function, and become frustrated like I did on this group of inquiries. I think the word Greddy in the search may be the problem, as there is a high percentage of threads and replies that have that word, even where the original topic is say, Differential.

Thanks

Ron
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Old 02-15-2009, 01:22 PM   #2
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Turbo Upgrades, but they won't ship to Canada.

Someone on here had his upgraded to a 19G wheel,
https://www.miataturbo.net/forum/t30933/

What are you wanting to accomplish with the wheel upgrade? More power? The TD04-15G is going to be good to 270-280HP as it sits.

You'll find there was a purge in the forum a couple of years ago, so there might be some information lost. For the remaining information, you'll just have to wade through the *****, the search is only going to be so intelligent.

Jay
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Old 02-15-2009, 01:26 PM   #3
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I also upgraded to the 19T compressor wheel. The wastegate still sucks, we are going to see how EBC helps out.
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Old 02-15-2009, 01:34 PM   #4
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You've been living in a cave if you still have the wastegate that came with the kit. I replaced mine and it went from a really jumpy boost gauge needle (like +/- 3 or 4psi) to a rock steady needle, higher than I wanted it to be. So its not only a convenience upgrade, its for engine safety too, you could be boosting higher than expected.
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Old 02-15-2009, 02:59 PM   #5
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Are you dead set on improving the greddy turbo only? There are other upgrades that can give you more power and torque;
Bigger exhaust with hi flow cat/muffler
front mount intercooler (FMIC)
Bigger injectors 460 or 550's PnP options look at the turbo FAQ
Going to a complete standalone will give you gains as well as being able to run the said injectors (can have one built for good price)
You can get a new turbo mani with more flow, therefore more power
and Water Injection will lower your intake temperatues allowing you to increase timing

with all that said above you will be around low to mid 200's of course with a good dyno tune. You will need a wideband oxygen sensor and boost gauge before you do any of this
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Old 02-15-2009, 03:00 PM   #6
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What do you mean about the wastegate flapper letting air in?

The solution to the loose/rattling flapper is to tighten the WGA rod slightly, just enough that the flapper is held shut against it's seat. I completely agree with curly though, the original WGA has to go. I'm using the one FM sells (the one without a bracket, with a straight arm). You'll need a rod extension kit (atpturbo.com) and then fabricate your own bracket to hold it on.
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Old 02-15-2009, 03:05 PM   #7
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This is my old greddy kit.

I had the stock wastegate can on it with a helper spring. Would hold 9psi with out the MBC all day long. The helper spring in my opinion made a new wastegate can unnecessary.
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Old 02-15-2009, 04:52 PM   #8
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jayc72

“Turbo Upgrades, but they won't ship to Canada.”

Thanks Jay, I’ll check them out.

“Someone on here had his upgraded to a 19G wheel,
Help with tuning the upgraded Greddy T-19 Turbo”

So did you search this or have it saved?

“What are you wanting to accomplish with the wheel upgrade? More power? The TD04-15G is going to be good to 270-280HP as it sits.”

I have the time and money to upgrade, so looking at options before I make any changes.

“You'll find there was a purge in the forum a couple of years ago, so there might be some information lost. For the remaining information, you'll just have to wade through the *****, the search is only going to be so intelligent.”

Wading is what I’m trying to avoid.

Jay
__________________________________________________ ______________

curly

“You've been living in a cave (igloo ) if you still have the wastegate that came with the kit. I replaced mine and it went from a really jumpy boost gauge needle (like +/- 3 or 4psi) to a rock steady needle, higher than I wanted it to be. So its not only a convenience upgrade, its for engine safety too, you could be boosting higher than expected.”

Still researching options for wategate control.

__________________________________________________ ______________


sbkcocker499

“Are you dead set on improving the greddy turbo only?”

No. I am currently doing many things, and still making plans.

“ There are other upgrades that can give you more power and torque;
Bigger exhaust with hi flow cat/muffler”
front mount intercooler (FMIC)
Bigger injectors 460 or 550's PnP options look at the turbo FAQ
Going to a complete standalone will give you gains as well as being able to run the said injectors (can have one built for good price)”

Done

“You can get a new turbo mani with more flow, therefore more power
and Water Injection will lower your intake temperatues allowing you to increase timing “

Mani probably wont change, WI I’m still deciding the route.


“with all that said above you will be around low to mid 200's of course with a good dyno tune. You will need a wideband oxygen sensor and boost gauge before you do any of this”

I have an Innovate WB, I know all about tuning.

__________________________________________________ _____________


kotomile

“What do you mean about the wastegate flapper letting air in? “

If exhaust can blow out, pulses can suck clean air back in raising the O2 content in the exhaust pipe. Exhaust leaks anywhere before the sensor (WB or NB) can disrupt the readings.

“The solution to the loose/rattling flapper is to tighten the WGA rod slightly, just enough that the flapper is held shut against it's seat. I completely agree with curly though, the original WGA has to go. I'm using the one FM sells (the one without a bracket, with a straight arm). You'll need a rod extension kit (atpturbo.com) and then fabricate your own bracket to hold it on.”

Having not run the turbo yet, I don’t know that it rattles. That’s not what my concern is with the flapper shaft. Thanks for the good info on the WGA tho.

__________________________________________________ _____________

jayc72

“This is my old greddy kit.”

Yes, and thanks again Jay

“I had the stock wastegate can on it with a helper spring. Would hold 9psi with out the MBC all day long. The helper spring in my opinion made a new wastegate can unnecessary.”

I will probably let the MS control the WG, and therefore I am undecided on WGA choice at this time. That’s a whole different topic for the future.

Thanks to everyone for the responses, but I would still like to see some search tutorials.

Ron
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Old 02-15-2009, 04:59 PM   #9
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I think I searched "greddy upgrade wheel" and waded through a couple of posts.
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Old 02-15-2009, 06:08 PM   #10
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I think you need to do a bit more research about a wastegate's function, OP, based on your explanation of your concerns about air in the exhaust.
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Old 02-15-2009, 06:24 PM   #11
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Quote:
Originally Posted by kotomile View Post
I think you need to do a bit more research about a wastegate's function, OP, based on your explanation of your concerns about air in the exhaust.
Indeed

I am not concerned about the flapper, I am concerned about the looseness of the shaft going through the housing. It would seem to me the flapper "could" be affected by this, but my primary concern is leakage to atmosphere. I may not have worded this correctly, and I may not have read your reply correctly as well.

None the less, my question here is how to remove the shaft without damage, and keeping it reusable.

Ron
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Old 02-16-2009, 01:15 AM   #12
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I had the T-19 upgrade and a bigger WG actuator installed. The turbo makes more power but the actuator is dead on! I will post a graph soon. It spools to 14 psi and is rock steady till redline. REPLACE YOUR ACTUATOR, big difference.

I also have:
2.5" DP
FMIC
2.5" exhaust
MBC and EBC (currently needs tuning)
ETD greddy manifold.
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Old 02-16-2009, 06:06 PM   #13
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Quote:
Originally Posted by IcantDo55 View Post
I had the T-19 upgrade and a bigger WG actuator installed. The turbo makes more power but the actuator is dead on! I will post a graph soon. It spools to 14 psi and is rock steady till redline. REPLACE YOUR ACTUATOR, big difference.

I also have:
2.5" DP
FMIC
2.5" exhaust
MBC and EBC (currently needs tuning)
ETD greddy manifold.
And a picture!...or email me one, lol. I'm curious as to how you have yours setup before I order a wastegate from them. Did they give you a part number or anything?
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