GT2560R: The one with the Inconel wheel or the other one? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-16-2010, 05:31 PM   #1
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Default GT2560R: The one with the Inconel wheel or the other one?

So as best I can tell there are two versions of the GT2560R: the 466541-1 and 466541-4. The -4 has a Ni-Resist turbine housing and an Inconel turbine wheel. The -1 doesn't. I don't know what the turbine wheel on the -1 is made of.

Both are exactly the same price.

I am having a hard time finding a description of what the trade-offs are. There must be trade-offs if the price is the same and both are available. I assume the Inconel wheel is stronger at high temperatures. I am guessing it is also heavier, but since I don't know what the other material is I don't know for sure.

Which one is better?

Intended use is street & occasional track days at 8/10ths.


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Old 04-16-2010, 05:47 PM   #2
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In all honesty... I think you will be okay with either. Inconel is just a different alloy that is more resistant to heat than other alloys. They are common in WRC due to the heat produced by their anti-lag systems. The Inconel wheel depending on the alloy will add more cost typically. Ceramic is bad...
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Old 04-16-2010, 05:51 PM   #3
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The fact that they cost exactly the same is what's confusing me more than anything.
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Old 04-16-2010, 06:41 PM   #4
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Actually, the Inconel -4 CHRA is slightly cheaper (<2% difference, but still) than the -1 CHRA. Full assemblies are the same price. Weird.
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Old 04-17-2010, 08:23 PM   #5
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You could just call the techies at Garrett. They would be more than helpful.
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Old 04-27-2010, 09:10 AM   #6
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The GT25/60R is the standard turbo on the Australian SP turbo Mx5. All the motorsport guys over here running 2B production sports car specify the inconnel version for durability.
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Old 04-27-2010, 04:21 PM   #7
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Quote:
Originally Posted by autoluxury View Post
Why not use a 2871R?
why not date men?
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Old 04-27-2010, 04:28 PM   #8
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I thought turbine wheels were typical made of Monel. You should PM JKav, I'd love to hear the answer.
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Old 04-27-2010, 04:28 PM   #9
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Quote:
Originally Posted by y8s View Post
why not date men?
I enjoyed our date together, it was a hot night. I'll never forget the beef we chomped down.
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Old 04-28-2010, 07:10 PM   #10
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Quote:
Originally Posted by luigi View Post
You could just call the techies at Garrett. They would be more than helpful.
Do you have a contact there? There's no phone number on the web site and I can't imaging calling Honeywell HQ is going to be very useful.

I've tried emailing a few distributors and haven't gotten a reply.
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Old 04-28-2010, 07:28 PM   #11
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Well Kday it seems that I gave you some less than informed advice. I apoligize. I tried to contact them and all I got was the advice to read there tech articles and then contact one of there distributors.
Globalazation has taken us from a service oriented Republic to a **** you Corpocracy. C'est La Vie! C'est Le Guer!
Sorry.
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Old 04-28-2010, 08:03 PM   #12
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Hey, no problem, it was a good suggestion, since my inclination is to avoid the telephone and it hadn't occurred to me to look for a phone number.

It's peculiar that this is not common knowledge though. Maybe I should cross-post it on m.net?
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Old 05-17-2010, 01:36 AM   #13
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Well, I ended up getting the -4 version. Here it is next to a broken 2560 out of a Nissan, note the different casting for the turbine housing. I don't know if this was a running change for both the -1 and -4 turbos or if it's unique to the -4.

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Old 05-17-2010, 01:28 PM   #14
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Considering the kinds of EGTs a lot of people run, I would jump at an inconel wheel.
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