Lets talk Turbine size and A/R continued

jkholder09

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Jan 8, 2012
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We were starting to get some really good info in Mikes turbo thread.
I wanted to continue the discussion here.

This thread is only for single turbo's that we are daily driving.
Feel free to post video's, spoolup and quarter mile time.

I will start by saying how impressed I am with the relatively new 87 j trim turbine by airwerks. The spoolup reminds me of the 83mm tw and the flow up top is getting close to the old 96/88 tw.
 

jkholder09

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Its a Bullseye s375/87/.90 with a billet wheel and a 1058 converter. 40% nozzles on a stock CP3.

That was not WOT, nor did I flat foot it. I kind of just eased into it until it lit. When I get my AirDog working again I'll go make another video of me stomping on it.



I've put a little over 25k miles on this charger in less than 2 years and I have had zero complaints. I tow 5-6k with this truck on a weekly basis and it does great.


The 472 and 475 both act about the same given the are 87 or 83 and .90.
The spoolup is very close.
The 75 takes more drive.

I went from a 75cw to a 72mm cw fmw model loosend up the housing and now it spools the same as the 75 but performance and egts/ pressures are better.

The top end power is about the same but comes in 300 rpm higher.

No dyno numbers or tracktimes to back up any results yet.
I can tow if I use od lockput and watch egt like a hawk.

87 j trim tw
2200 stall tc
150% injectors
Lly 16.2:1 ported heads and cam

My stock turbo blows them off no problem after about 60 and I think most of are trucks smoke mess with the tc locked in od lol

some quotes from the previous thread
 

joegorby

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Apr 12, 2012
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I started with a BWM 472/83/.90 then changed the cartridge to a 87/1.10
45% sticks
2 cp3
stock motor
suncoast 1057
 
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Xternal

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Aug 31, 2012
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Looking for a suggestion. 40% exergys, stock cp3, lb7, stock cam and heads, ZF6. Hardly ever tow, mostly a toy. Leaning towards an 72/83/90 and ditching the s366 kit I just got.
 

Hot COCOAL

May the farce be with you
Jun 9, 2012
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The 472 and 475 both act about the same given the are 87 or 83 and .90.
The spoolup is very close.
The 75 takes more drive.

I went from a 75cw to a 72mm cw fmw model loosend up the housing and now it spools the same as the 75 but performance and egts/ pressures are better.

The top end power is about the same but comes in 300 rpm higher.

No dyno numbers or tracktimes to back up any results yet.
I can tow if I use od lockput and watch egt like a hawk.

87 j trim tw
2200 stall tc
150% injectors
Lly 16.2:1 ported heads and cam



some quotes from the previous thread

Could you, or someone please be kind enough to define a couple abbreviations for me please, I'd like to be on the same page as you guys :eek:

83 87 .90. - referring to 83mm compressor, 87mm turbine .90A/R....?
87J trim TW
75 CW
CW fmw

Thanks :hug:

:thumb:
 

jkholder09

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I think we need to go to this standard

Cw/tw/ar
Cw is compressor wheel inducer (small side)
Tw is turbine wheel inducer ( big side)
Ar is how loose or tight the turbine housing is

J trim and g trim are the tw shape
Fmw forged mill wheel it is better than billet because the metal is pressed into shape then milled.




from mobile
 

Hot COCOAL

May the farce be with you
Jun 9, 2012
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Hey guys, one thing I always see happen in these threads is that the Borg turbos seem to naturally get gravitated to, for lots of reasons, they are very interchangeable/customizable, easy to get your hands on and fairly cheap.

So naturally in an internet thread they get tons of play. One thing I find frustrating is that there is never any direct comparison between manufactures turbos, as side by side spreadsheet style comparison.

It would be nice, and I think very helpful to have a database/archive to review.

So what is the Garrett and Holset equivalent to the chargers stated above?

Has anyone put an EFR turbo to good use yet?

I still am torn on ditching my VGT set up and running a straight vane set up. I like the simplicity of a single turbo system and have also been looking into different options and pros/cons of various sizes of turbo.

I like the GTX4294R in a .90 or a 1.01 A/R, the GTX4202R has more to offer on the top end, sure, but I'm only going by paper stats and I'm looking at a fairly tight A/R so I figure the added airflow potential of the 02R won't be utilized like it would with a larger A/R like a 1.15.

I bet if someone really hashed out a solid tune for the 4294 it would spool noticeably better than a 4202 and have better street and tow manners while still putting up very respectable whp and tq numbers

The new GTX4088R looks like it's got plenty of potential for high 600's and would be very street and tow friendly.

We can't leave out marks vgt72 or Chase' 71mm cheetah either, they have booth been proven winners.

I think it's also noteworthy to add that , the GTX turbos require less oil for lubrication and heat dissipation and therefor your engine oil temps should reflect that, I/you would think...

:nothingtoadd:

:popcorn:
 
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Hot COCOAL

May the farce be with you
Jun 9, 2012
4,433
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0
I think we need to go to this standard

Cw/tw/ar
Cw is compressor wheel inducer (small side)
Tw is turbine wheel inducer ( big side)
Ar is how loose or tight the turbine housing is

J trim and g trim are the tw shape
Fmw forged mill wheel it is better than billet because the metal is pressed into shape then milled.




from mobile

:thumb::thumb::thumb:

Thanks.

I wasn't aware there were fmw's available for us...?links?
 

jkholder09

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Ok garrett we need to focus on gt42 and gt 45
77mm and 82mm tw respectively
So a gt 4202 would match a s475/83
And a gt 4502 is a s475/87

Next jump to gt..08 is an 80mm cw so the 72mm is not standard in garrett

The gtx4294 is odd also because it uses a 71/94 cw instead of yhe normal 68/94 cw

S472 cw is 72/100

So basically it is not apples to apples



from mobile
 
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S Phinney

Active member
Aug 15, 2008
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Quncy, Fl
S472/87/1.00
Dual cp3 150% inj
2200 stall
Cam and headwork


from mobile

It drives great as a single? I am using this as a primary in a triple kit with 200 overs. I haven't gotten it in the truck yet but will have it done pretty soon. I'm just curious as to what to expect. I am also using a 1055 converter.

Sent from my XT1080 using Tapatalk
 

Hot COCOAL

May the farce be with you
Jun 9, 2012
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Ok garrett we need to focus on gt42 and gt 45
77mm and 82mm tw respectively
So a gt 4202 would match a s472/83
And a gt 4502 is a s472/87

Next jump to gt..08 is an 80mm cw so the 75mm is not standard in garrett

The gtx4294 is odd also because it uses a 71/94 cw instead of yhe normal 68/94 cw

S472 cw is 72/100

So basically it is not apples to apples

But looking at this, the 4294 has a nice sized compressor wheel with an almost "undersized" turbine wheel, so would that not be indicative of quick spooling characteristics?




Turbodriven.com

from mobile

:thumb: thank you