Disco Potato or T3 Super 60? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

View Poll Results: Which turbo for my 1.8 swap?
GT2860RS (Disco Potato) 13 54.17%
t3 Super 60 11 45.83%
Voters: 24. You may not vote on this poll

Reply
 
 
 
LinkBack Thread Tools
Old 11-19-2007, 10:30 PM   #21
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Quote:
Originally Posted by hustler View Post
dp so you can get a ricer fanclub. That's why i went with it.
Let's be perfectly honest with ourselves, here. You have no idea why you went with it. :gay:
Savington is offline   Reply With Quote
Old 11-19-2007, 11:37 PM   #22
Elite Member
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

Stay away from the chinacharger GT series they suck
Loki047 is offline   Reply With Quote
Old 11-20-2007, 12:22 AM   #23
Senior Member
 
Join Date: Mar 2006
Posts: 1,379
Total Cats: 1
Default

Did you get one Loki? I have not seen the GT China charger. Sleeve Bearings seem to be something the chinese understand well enough... not sure I would trust them with a ball bearing either!
Markp is offline   Reply With Quote
Old 11-20-2007, 09:19 AM   #24
Senior Member
Thread Starter
iTrader: (12)
 
Join Date: Nov 2005
Location: Murfreesboro, TN
Posts: 596
Total Cats: 3
Default

OK, so on the 2871r, what trim? The maps look like the 48 is the best fit and the 52 would work but the 56 seems too big. Is that everyone elses thoughts?

Markp, what are the specs on your Ghettocharger?

I also looked at the maps using squirrel performances calculator and it looks like the T3 S60 may run out of steam on the top end. I don't know what the hell to do now? Damn, I sound like hustler, dont I?
sbrian2 is offline   Reply With Quote
Old 11-20-2007, 09:32 AM   #25
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,484
Total Cats: 248
Default

Buy one of each GT, they are interchangeable. Sell the ones you don't like.
TurboTim is offline   Reply With Quote
Old 11-20-2007, 09:35 AM   #26
Elite Member
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

Quote:
Originally Posted by Markp View Post
Did you get one Loki? I have not seen the GT China charger. Sleeve Bearings seem to be something the chinese understand well enough... not sure I would trust them with a ball bearing either!
I was thinking about it, but I asked all the people that bought them on EBAY (took me a week or so cause you can only ask so many peolpe a day) and there were two responses total. A) I havent installed it yet or B) I installed it and it broke the second time I hit boost.

Surprisingly everything seemed good about these except for the bearings. Part of me wants to buy one then have Garrett replace the cartridge for whatever cheap price that is.

Sbrian link/post the maps your looking at (im too lazy to search)
Loki047 is offline   Reply With Quote
Old 11-20-2007, 09:37 AM   #27
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Quote:
Originally Posted by TurboTim View Post
Buy one of each GT, they are interchangeable. Sell the ones you don't like.
Thats losing out on a lot of cash. GT series turbos depreciate the moment they come out of the box. You can look on ebay to see that.
neogenesis2004 is offline   Reply With Quote
Old 11-20-2007, 10:08 AM   #28
Senior Member
Thread Starter
iTrader: (12)
 
Join Date: Nov 2005
Location: Murfreesboro, TN
Posts: 596
Total Cats: 3
Default

This is with guestimated data points for my car. Each dot represents engine rpms of 1000, 2500, 3150, 3800, 4650, 5500, 6350, and 7200.









sbrian2 is offline   Reply With Quote
Old 11-20-2007, 10:13 AM   #29
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,847
Total Cats: 1,788
Default

I'd gamble it would take less than 15psi on your 1.8 to reach 30lb/min, however, you really need to think, will you ever want to run more than that....the 2560 will take you a bit further, however it drops off quickly, the 2871 has plenty more in it without even going below 70%
Braineack is offline   Reply With Quote
Old 11-20-2007, 10:17 AM   #30
Junior Member
iTrader: (1)
 
Join Date: Sep 2006
Posts: 464
Total Cats: 0
Default

What numbers did you use for those plots?
PAT! is offline   Reply With Quote
Old 11-20-2007, 10:20 AM   #31
Junior Member
iTrader: (8)
 
Join Date: Jun 2005
Location: Lansdale, PA
Posts: 426
Total Cats: 0
Default

I think GT series turbos hold their value more then most turbos. When I was shopping for my current turbo, I found mildly/barely used gt28r and gt28rs turbos consistently sold for 600-750 dollars on ebay. The most you'd lose if you tested two new turbos is 100-200 bucks. I don't think that's much if you're looking for the perfect turbo. Plus, we all can see the results

Quote:
Originally Posted by neogenesis2004 View Post
Thats losing out on a lot of cash. GT series turbos depreciate the moment they come out of the box. You can look on ebay to see that.
Stripes is offline   Reply With Quote
Old 11-20-2007, 10:21 AM   #32
Elite Member
iTrader: (6)
 
Loki047's Avatar
 
Join Date: Sep 2005
Location: Chicago
Posts: 4,145
Total Cats: 0
Default

Nope, GTs are riskier cause they can not be rebuilt
Loki047 is offline   Reply With Quote
Old 11-20-2007, 10:23 AM   #33
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

Hell our 1.6's make better than 30 lb/min at 2 pr Those numbers are fine if you indicate heat soak and shitty tune but with a good tune and AIT's you should move alot more air and likewise move cooler air with the larger compressor as the effeciency, and overall compression per compressor revolution will be alot better.
magnamx-5 is offline   Reply With Quote
Old 11-20-2007, 10:29 AM   #34
Junior Member
iTrader: (8)
 
Join Date: Jun 2005
Location: Lansdale, PA
Posts: 426
Total Cats: 0
Default

Riskier, yes. All the auctions I have followed were the GT turbo is "like new" always sold for a decent amount. Now, buying a GT turbo with a million miles on it is just silly.
Stripes is offline   Reply With Quote
Old 11-20-2007, 10:47 AM   #35
Senior Member
Thread Starter
iTrader: (12)
 
Join Date: Nov 2005
Location: Murfreesboro, TN
Posts: 596
Total Cats: 3
Default

I went back and looked at the numbers again and they were a bit off. :gay:

Here are the new maps with better data. It looks like the T3 S60 is a definate no go, the GT2860RS is maxed out, and the small 2871R is almost maxed out as well.









sbrian2 is offline   Reply With Quote
Old 11-20-2007, 11:27 AM   #36
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,484
Total Cats: 248
Default

Quote:
Originally Posted by sbrian2 View Post
I went back and looked at the numbers again and they were a bit off. :gay:

Here are the new maps with better data. It looks like the T3 S60 is a definate no go, the GT2860RS is maxed out, and the small 2871R is almost maxed out as well.



https://www.miataturbo.net/miata-parts-sale-trade-5/f-s-new-garrett-gt2871r-0-64-r-14084/

TurboTim is offline   Reply With Quote
Old 11-20-2007, 11:53 AM   #37
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

Quote:
Originally Posted by TurboTim View Post
hmmm one turbo tim turbo or two T3s.... hmmm.
y8s is offline   Reply With Quote
Old 11-20-2007, 05:22 PM   #38
Senior Member
 
Join Date: Mar 2006
Posts: 1,379
Total Cats: 1
Default

Quote:
Originally Posted by sbrian2 View Post
OK, so on the 2871r, what trim? The maps look like the 48 is the best fit and the 52 would work but the 56 seems too big. Is that everyone elses thoughts?

Markp, what are the specs on your Ghettocharger?

I also looked at the maps using squirrel performances calculator and it looks like the T3 S60 may run out of steam on the top end. I don't know what the hell to do now? Damn, I sound like hustler, dont I?
The T3S60 runs out of steam at ~300 RWHP. The compressor on the 2871 is much larger and much more capable.

As a matter of fact the ghettocharger is not much different and REALLY damn near the XX76R compressor. The closest turbo to the ghettocharger is the GT3076R, which has an 84 trim 60mm turbine with a .63 A/R housing.

Mark

PS - Specs below for comparison.

Ghettocharger

# Compressor

* Inducer = 52.8 mm
* Exducer = 75.5 mm
* Trim = 49
* A/R = 0.50

# Turbine

* Inducer = 57.8 mm
* Exducer = 73.4 mm
* Trim = 62
* A/R = 0.63

GT2871

# Compressor

* Inducer = 49.2 mm
* Exducer = 71 mm
* Trim = 48
* A/R = 0.60

# Turbine

* Inducer = 53.8 mm
* Exducer = 61.7 mm
* Trim = 76
* A/R = 0.86

GT2876R

# Compressor

* Inducer = 52.7 mm
* Exducer = 76 mm
* Trim = 48
* A/R = 0.70

# Turbine

* Inducer = 53.8 mm
* Exducer = 61.7 mm
* Trim = 76
* A/R = 0.86
Markp is offline   Reply With Quote
Old 11-21-2007, 11:12 AM   #39
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,484
Total Cats: 248
Default

Quote:
Originally Posted by Markp View Post
GT2871 48 Trim

# Compressor

* Inducer = 49.2 mm
* Exducer = 71 mm
* Trim = 48
* A/R = 0.60

# Turbine

* Inducer = 53.8 mm
* Exducer = 61.7 mm
* Trim = 76
* A/R = 0.86
GT2871 56 Trim

# Compressor

* Inducer = 53.1 mm
* Exducer = 71 mm
* Trim = 56
* A/R = 0.60

# Turbine

* Inducer = 53.8 mm
* Exducer = 61.7 mm
* Trim = 76
* A/R = 0.86
TurboTim is offline   Reply With Quote
Old 11-21-2007, 11:32 AM   #40
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

remember you can get the .64 A/R turbine housing option too. surprising how similar in size my 2876R compressor is to the ghetto.
y8s is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
kiladonut's turdbo'd minivan slayer kiladonut Build Threads 33 07-21-2015 05:12 PM
Need MS3 Tuning Help; Backfiring SteyrTMP MEGAsquirt 4 09-15-2014 01:10 PM
WTB - Artech or equiv. custom bottom mount manifold and DP - 4 levels of awesomeness Landrew WTB 4 03-24-2014 11:23 AM
the parts to complete my project mtl_miata General Miata Chat 38 01-19-2010 05:35 PM
Disco Potato Dr. Nick DIY Turbo Discussion 8 08-24-2006 08:11 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:42 AM.