Miata Turbo Forum - Boost cars, acquire cats.
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Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   Measured my China 2860 (Now with Datalog) (https://www.miataturbo.net/diy-turbo-discussion-14/measured-my-china-2860-now-datalog-33296/)

ArtieParty 03-30-2009 10:06 AM
I run 550s with a walboro 190, and I see 77% DC at 15 or 17psi (i forget which one.) Laptop's in the car. Im just too lazy to go get it.

levnubhin 03-30-2009 10:26 AM
Originally Posted by Turbo_4 (Post 388352)
So any idea what the oil inlet size is? lol
Whatever a T25 call's for. I can't remember exact but it's the same as my GT2554 was. Everything swapped right over.
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Braineack 03-30-2009 10:34 AM
1 Attachment(s)
Originally Posted by levnubhin (Post 388350)
Sorry, lol. Fuel is ok, MLV and MS read leaner then the dash top AEM gauge does the richer it gets.

To be honest I really didn't notice a whole lot difference in spool. It looks like it spools slower on the log but it dosent feel a whole lot different. Needs more boost.

Oh, I wanted to ask. What injectors does Newbsauce run and what were his DC's at 17 psi. I'm already seeing 72% at 11 psi on my 550's and walbro 190.
I bet it's because of the torque output, Brad's spools much slow than mine, but he has the same torque output below 4k...

Attachment 207091


his max DC% logged that day was 73.3%

levnubhin 03-30-2009 10:42 AM
Originally Posted by Braineack (Post 388365)
his max DC% logged that day was 73.3%
What injectors/fuel pump?
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1stproject 03-30-2009 10:46 AM
Good stuff!!! Now go drive a few thousand miles and report back :)

levnubhin 03-30-2009 10:50 AM
Originally Posted by 1stproject (Post 388370)
Good stuff!!! Now go drive a few thousand miles and report back :)
I'll rack them miles up b4 you know it. 50 a day.
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Braineack 03-30-2009 11:04 AM
Originally Posted by levnubhin (Post 388369)
What injectors/fuel pump?

walbro 190HP, 550cc rx7 injectors, stock FPR & rail

GrahamC 03-30-2009 11:29 AM
So how does this feel in comparison to the GT2554? I'm really interested in changing to this if it works out well. Need more power!

Saml01 03-30-2009 12:10 PM
Yo Phil, at what RPM do you get boost onset?

Originally Posted by y8s (Post 388090)
which means it's a smokin deal except for the bearing is journal right?

Its a smokin deal in any case.

levnubhin 03-30-2009 12:12 PM
Originally Posted by GrahamC (Post 388391)
So how does this feel in comparison to the GT2554? I'm really interested in changing to this if it works out well. Need more power!
I'm happy so far. Will let know once I'm running more boost.
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levnubhin 03-30-2009 12:13 PM
Originally Posted by Saml01 (Post 388406)
Yo Phil, at what RPM do you get boost onset?

It's actually pretty responsive. Hits 5psi really quick. When I'm able to drive it in light traffic I'll get a better feel for it.
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rogezeus2003 03-30-2009 04:02 PM
This turbo is oil and water cooled right? What about oil pressure TO the turbo, r u using a restrictor?

levnubhin 03-30-2009 04:07 PM
Originally Posted by rogezeus2003 (Post 388508)
This turbo is oil and water cooled right? What about oil pressure TO the turbo, r u using a restrictor?

No I'm not, but I think I should be. Thanks for reminding me.


What works well for restricting the oil feed?
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rogezeus2003 03-30-2009 04:16 PM
The reason I mentioned is because my previous experience with chinachargers indicates that they will blow the oil seals and start smoking oil if they are not properly restricted,since the engine oil pressure is higher that what they can take. look for an oil restrictor on Ebay.

Roger

Braineack 03-30-2009 04:19 PM
Originally Posted by levnubhin (Post 388509)
What works well for restricting the oil feed?

is it smoking?

y8s 03-30-2009 04:23 PM
Originally Posted by levnubhin (Post 388509)
No I'm not, but I think I should be. Thanks for reminding me.


What works well for restricting the oil feed?
the ATP oil feed inlet w/tiny hole thingamabob.

-4 size Oil inlet fitting for GT28/30/35R with built-in restrictor: atpturbo.com

levnubhin 03-30-2009 04:27 PM
Originally Posted by Braineack (Post 388520)
is it smoking?
No and Id like to keep it that way lol. Im wondering if my 2554 died because of too much pressure. Before I took it off it smoked out the exhaust and oil collected in the compressor.

Originally Posted by y8s (Post 388526)

Yeah, I went to the DIY FAQ and saw that.

Are there any DIY solutions? If not I'm going to stop at Murray's speed and custom on the way home. I'm sure they have something.
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Braineack 03-30-2009 04:28 PM
a 1/8" pop rivet. search under sam navy's posts.

wayne_curr 03-30-2009 04:33 PM
are you using a -4 or -3 feed line?

levnubhin 03-30-2009 04:34 PM
Originally Posted by wayne_curr (Post 388538)
are you using a -4 or -3 feed line?

Honestly can't remember and I'm good enough to know by just looking.
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