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Old 12-02-2008, 02:12 AM   #1
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Default To 19T or not to 19T...This is the question.

Ok, so it appears my turbo is truly fucked.

I don't have time to rebuild it, nor the tools/will to right now. I'm exhausted from school and these last two weeks are going to be rough.

My options from G-Pop Shop (best of places I've contacted):

High Performance Rebuild: pretty much stock rebuild w/ a steel thrust bearing, shipped back to me for: $430.

HP + 19T compressor wheel upgrade including machining: $605.

They are going to pull the turbo apart, see what was wrong with it, then let me know.

In the mean time, I'm having a hard time deciding to spend the extra coin. The car is a 90 1.6, but will be receiving a built 1.8 sometime within the year which I am shooting for at least upper 200s.

I'm broke, but wanted to see what the crew thought. 2.5" TBE, FMIC, MS, 550cc.


19T wheel should be good for roughly...310-320?
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Old 12-02-2008, 09:27 AM   #2
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So...nobody has done this?
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Old 12-02-2008, 09:51 AM   #3
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a 19T? to make upper 200whp? Yeah it can do it alright, considering that wheel can support over 370HP. I'd compare it closely to a 16g, 60 trim t3, or 2560 wheel.
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Old 12-02-2008, 12:30 PM   #4
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go for it. i'd try it if i needed a rebuild and intended to keep the greddy setup while shooting for "at least upper 200s" i don't know of anyone doing it yet but i'd love to see the results
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Old 12-02-2008, 02:19 PM   #5
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Watching this thread...T19, more greddy powah!
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Old 12-02-2008, 02:21 PM   #6
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Are you planning on keeping this turbo for use on the future 1.8?
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Old 12-02-2008, 02:39 PM   #7
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Quote:
Originally Posted by Atlanta93LE View Post
Are you planning on keeping this turbo for use on the future 1.8?

Yep.

Apparently all I need is the ETD manifold and everything else (downpipe included) should mate up just fine.


Quote:
Originally Posted by Braineack View Post
a 19T? to make upper 200whp? Yeah it can do it alright, considering that wheel can support over 370HP. I'd compare it closely to a 16g, 60 trim t3, or 2560 wheel.
I know this came up before and you did the math saying ~315-330rwhp? The guys at the shop said it would be good for around the same amount of flow/power in the efficiency range.
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Old 12-02-2008, 02:40 PM   #8
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Quote:
Originally Posted by Mach929 View Post
go for it. i'd try it if i needed a rebuild and intended to keep the greddy setup while shooting for "at least upper 200s" i don't know of anyone doing it yet but i'd love to see the results
Ben made like 255 on the stock turbo with pretty much the same mods I have.

I figure it would be a hell of a lot cheaper than buying new **** when I go 1.8.

I just don't want it to be a **** bucket on the 1.6 while I have it.
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Old 12-02-2008, 03:04 PM   #9
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Quote:
Originally Posted by miatamania View Post
I know this came up before and you did the math saying ~315-330rwhp? The guys at the shop said it would be good for around the same amount of flow/power in the efficiency range.

something around there....depends if i decide to use 12:1 or 11:1 as a multiplier when calculating.
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Old 12-02-2008, 03:13 PM   #10
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lol, so basically we aren't really sure?


Kinda like my injectors, more than enough for what I plan on doing.


But my main concern is how spool will be affected...it shouldn't hurt it that bad? its not like it is spectacular on a 1.6 compared to other turbos.
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Old 12-02-2008, 03:25 PM   #11
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its more like this....


the 19T can support around 500CFM at 15psi (this doesn't mean 15psi will give you 500cfm). http://www.stealth316.com/images/td04h-19t-cfm.gif

500CFM is around 34.5 lb/min

34.5 lb/min / 12:1 AFR / (.55/60 BSFC) = 313BHP

34.5 lb/min / 11:1 AFR / (.55/60 BSFC) = 340BHP

push it to 550CFM and that's 38 lb/min or 377BHP if you use 11:1



Spool will likely suffer slightly. wheel isn't that much bigger...not like going to a 76mm wheel or something, the wheel is about the same size as mine.
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Old 12-02-2008, 03:30 PM   #12
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I'm glad you understand that, I understand what you wrote.

Just not a whole lot of why. learning curve ftw. :(

Thanks.
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Old 12-02-2008, 06:54 PM   #13
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I was thinking about doing the same mod to my greddy set up, So do it and let us all know how it comes out!
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Old 12-02-2008, 06:58 PM   #14
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Yes you should definately do it if you're planning on running it for the long haul. This is something I wanted to do badly.

GPOP claims that with the p&p job that they do, there is no difference in spool before/after between a totally stock turbo and the worked over 19t hybrid.
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Old 12-02-2008, 07:22 PM   #15
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That would be pretty sweet.

The way I see it, I couldn't justify just modding it, but it is going to be apart anyway...so what the hell.
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Old 12-04-2008, 02:42 PM   #16
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Turbo went out a few days ago, hopefully I'll hear back on if anything is FUBAR'd.

If not, I'm going to go ahead and have the wheel done.
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