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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 09-28-2007, 05:07 PM   #21
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the 2871 48 trim has a 49.2mm inducer and 71.0mm exducer, 0.60 A/R compressor.

the 2871 56 trim has a 53.1mm inducer and 71.0mm exducer, 0.60 A/R compressor. This is the turbo I have in a box somewhere along with the larger .86 turbine.

I don't know how to get the lb/min numbers that Scott has. But those 56 trim inducer/exducer/trims are the same as the GT3071 but with a 0.60 A/R instead of the GT3071's 0.50A/R compressor.

Confusing.
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Old 09-28-2007, 05:30 PM   #22
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Quote:
Originally Posted by TurboTim View Post
the 2871 48 trim has a 49.2mm inducer and 71.0mm exducer, 0.60 A/R compressor.

the 2871 56 trim has a 53.1mm inducer and 71.0mm exducer, 0.60 A/R compressor. This is the turbo I have in a box somewhere along with the larger .86 turbine.

I don't know how to get the lb/min numbers that Scott has. But those 56 trim inducer/exducer/trims are the same as the GT3071 but with a 0.60 A/R instead of the GT3071's 0.50A/R compressor.

Confusing.
gotta search, as they say. just have to find the sites that list the CFM for those comps. Like Ray Hall.
http://www.turbofast.com.au/GTseries.html

-48: 350hp 39 lb/min
-56: 400hp 44 lb/min
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Old 09-28-2007, 06:09 PM   #23
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www.turbobygarrett.com




why would you fail to go striaght to the manufacturers page?
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Old 09-28-2007, 07:40 PM   #24
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Originally Posted by Braineack View Post
www.turbobygarrett.com




why would you fail to go striaght to the manufacturers page?
that website is so overdesigned it's almost too hard to use.
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Old 09-30-2007, 09:53 PM   #25
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Does this look like a BEGi cast mani w/ an external wg flange simply welded to the bottom?



I'm considering going external gate. Seems worthwhile. "In for a penny, in for a pound"
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Old 09-30-2007, 10:01 PM   #26
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Thats exactly what it looks like to me. I'm considering getting one made for my 1.6 with a t3 and tial 44mm flanges. If they can do that that is.
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Old 09-30-2007, 10:11 PM   #27
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Do
It
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Old 09-30-2007, 10:36 PM   #28
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the exhaust tube from wg to downpipe becomes a major concern. i can't make that ****.

you wanna fly? i'll send you airtran... maybe even upgrade ya to business class








but probably not :gay:
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Old 09-30-2007, 10:43 PM   #29
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That's my predicament. I have a regular Begi T3 mani and a T3 50 trim that i'm gonna hybrid my TO4E compressor onto. I have a Tial 3xmm external on the car now but for the sake of easy fabrication i'd like to use a standard internal WG adapter that has a 2.5"vband outlet. The DP would be sooo easy. I worry about boost spike/creep problems though. That **** would stuck to do twice and I plan to bring the car up close to 300hp.
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Old 09-30-2007, 11:05 PM   #30
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Quote:
Originally Posted by Ben View Post
the exhaust tube from wg to downpipe becomes a major concern. i can't make that ****.

you wanna fly? i'll send you airtran... maybe even upgrade ya to business class








but probably not :gay:

riiiiight, plus I dont think I can weld tubing to cast iron anyway...

probably easiest and most cost effective (IF you go external) is to sell what you have and buy the new or used parts for it...
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Old 09-30-2007, 11:08 PM   #31
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I've never had a car with an internal gate so frankly I don't know if I need the external or if a internal with a good solid actuator will be good enough for me up to my ~300hp goal?
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Old 09-30-2007, 11:24 PM   #32
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Quote:
Originally Posted by y8s View Post
riiiiight, plus I dont think I can weld tubing to cast iron anyway...

probably easiest and most cost effective (IF you go external) is to sell what you have and buy the new or used parts for it...
no no I will probably get BEGi to take care of the exhaust manifold. the problem is limited to the tube between the external gate and the downpipe
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Old 09-30-2007, 11:50 PM   #33
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Quote:
Originally Posted by Ben View Post
no no I will probably get BEGi to take care of the exhaust manifold. the problem is limited to the tube between the external gate and the downpipe
why not let them do that too??
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Old 10-01-2007, 12:14 AM   #34
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yup I've asked Mr Bell about it but he hasn't responded yet. doesn't he know he's supposed to be answer pre sale questions on a sunday night.
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Old 10-01-2007, 12:16 AM   #35
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I was gonna say it would be nice to just send them the mani, wg, and turbine housing to have them fab you up a nice piece. I'm almost tempted to go that route.
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Old 10-01-2007, 01:30 AM   #36
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I have the 2876R for $1050 shipped.
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Old 10-01-2007, 11:08 AM   #37
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Quote:
Originally Posted by Wideopentuning View Post
I have the 2876R for $1050 shipped.
frankly i'm surprised prices on that thing haven't changed very much in the 5 years since I bought mine. double you tee eff?

Hey kelly, you know if the 2871's compressor and housing will bolt to the 2876 chra?
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Old 10-01-2007, 02:54 PM   #38
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Stephanie says they can convert one of their iron manifolds to external gate, and they can make the downpipe.
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Old 10-01-2007, 03:52 PM   #39
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How can a company like Garrett offer a turbo that's internally gated that creeps? What's the point of offering the internal gate then? Test a turbo on the least restrictive exhaust and make the internal gate flow enough so boost creep doesn't happen. It ain't like they can't test this **** before they offer it for sale.

Geez!

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Old 10-01-2007, 04:12 PM   #40
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I decided to keep my S256 after looking at dynos of a GT2871R on a B16 motor. The dyno plots are almost identical to my turbo except the S256 at 9000rpm is still in the middle island on its compressor map. Can you say peak tq at redline?
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