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Re: Which Turbine Housing for GTX28xx on 20vt
[Re: dw89]
#1549774
17/09/2015 20:20
17/09/2015 20:20
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Joined: Aug 2006
Posts: 1,904 Poland
deannn_20VT
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My life on the forum
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Poland
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Lieghton, what's your experience with GTX turbos? I did a lot of reading before choosing my turbo and saw a lot of back to back test of GTX vs GT series. Tests revealed that a GTX turbo will spool slower than a GT turbo but then will blow more air in higher revs. So, if dw89 is looking for a GTX as he wants faster spool then that's not the best option. I guess that your hybrids are the way to go though .
Last edited by deannn_20VT; 17/09/2015 20:22.
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Re: Which Turbine Housing for GTX28xx on 20vt
[Re: dw89]
#1549885
18/09/2015 14:49
18/09/2015 14:49
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Joined: Dec 2005
Posts: 8,489 Lightwater, Surrey
DaveG
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Club Treasurer Member 311
Je suis un Coupé
Joined: Dec 2005
Posts: 8,489
Lightwater, Surrey
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I've been looking at turbo's too, and from what I can tell the GTX2860R is a development of the GT2860RS (aka GT28rs) whereas the GT28r is aka GT2560R which is just what I have taken off my Coupe. It depends what power you think you want and whether you want to stick with standard internals or go forged? And isn't the extra "X" in GTX for the turbine with 10 blades, not 11? But I don't understand this idea of selling without the turbine (exhaust) housing, that's just asking for trouble with mis-matched setups surely?
1996 Portofino 20vt & 2000 Pearl White Plus 2008 Ferrari F430 & 2017 Fiat 124 Spider
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Re: Which Turbine Housing for GTX28xx on 20vt
[Re: dw89]
#1549890
18/09/2015 15:18
18/09/2015 15:18
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Joined: Aug 2006
Posts: 1,904 Poland
deannn_20VT
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AFAIK, the idea of selling GTX without turbine housing is that it is an upgrade for the Gt series so you reuse your old turbine housing.
Of course it is a matter of what power, torque and spook you want. Whether you want to go forged or stick with standard engine internals.
Difference between GT and GTX is not the turbine wheel but he compressor wheel and its housing. Even though Garrett says that the compressor wheels for GT2660 and GTX2860 are the same size is no the case. The GTX uses extended tip technology and because of this it is 2mm wider in diameter. So, naturally it can flow more air plus it is different designs wheel with 0/11 blades (billet for GTX) instead of 6/6 (cast iron) in GT2860.
Last edited by deannn_20VT; 18/09/2015 15:19.
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Re: Which Turbine Housing for GTX28xx on 20vt
[Re: dw89]
#1549896
18/09/2015 15:50
18/09/2015 15:50
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Joined: Aug 2006
Posts: 1,904 Poland
deannn_20VT
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Poland
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Yes, there is difference between GT28R and GT28RS. Why do you think that there is a hybrid called GT28RSR? - GT28R faster spool (rated up to 300bhp) - GT28RS more power as you go up the rev range (rated up to 350bhp) - GT28RSR best of both worlds You are incorrect. GTX2860R is bigger then GT2860RS.
Last edited by deannn_20VT; 18/09/2015 15:52.
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Re: Which Turbine Housing for GTX28xx on 20vt
[Re: dw89]
#1549902
18/09/2015 16:30
18/09/2015 16:30
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Joined: Feb 2010
Posts: 242 Slough, UK
dw89
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Making a profit
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OP
Making a profit
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Slough, UK
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I know that the GT28R is the fastest spool and the RS and RSR..etc..but I was wondering if anybody has driven them back to back, and if there is a noticeable difference between the 2/3 turbos? Also, regarding size, i was just going off the Garret website which states the GTX2860r has a Compressor ind Diameter of 45.70mm as opposed to the RS which has 47.2. Exd diameter is also smaller by 0.1 This is what lead me to believe that the GTX2860r is smaller, coupled with the fact it is applicable to a smaller engine size range and is efficient enough to be run at a lower power band.
~ LE112 ~
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