GT2554 spool is horrible - Page 4 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-03-2008, 08:05 PM   #61
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anyone have a 60mm compressor and housing they want to lend me?
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Old 08-04-2008, 02:24 AM   #62
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Why not go with an external wastegate?
Other turbo options?
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Old 08-04-2008, 10:59 AM   #63
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Quote:
Originally Posted by y8s View Post
anyone have a 60mm compressor and housing they want to lend me?

should asked me last week


i have a 60mm T3 50 trim wheel and housing you can have
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Old 08-04-2008, 11:35 AM   #64
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too small, need at least 60 trim on the T3.
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Old 08-04-2008, 11:37 AM   #65
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Quote:
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too small, need at least 60 trim on the T3.
well it would spool fast but yes, there's a good reason why I have those sitting on a shelf
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Old 08-04-2008, 04:50 PM   #66
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The moral of the story is that 3" exhausts are FTW.
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Old 08-04-2008, 06:08 PM   #67
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Quote:
Originally Posted by Savington View Post
The moral of the story is that 3" exhausts are FTW.
Sure, but my 2.5" system is not spooling too bad, especially with a 2560 (compared to a 2554) and a cast manifold. And, it is quiet, not much louder than stock really, and very non-rice.

Makes me want to unbolt the DP flange at the cat and log the spool to see if it makes much difference.

Last edited by ZX-Tex; 08-04-2008 at 06:46 PM.
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Old 08-12-2008, 12:26 AM   #68
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Sorry I'm late to post to this thread. I would like to see my line if that's ok with the powers that be. These numbers are from the last MT.net northeast dyno day in April. 4th gear pull I think. WG solenoid duty cycle is around 50% until it gets close to 14 (TPS based boost target) then it slows down...made 13.3 max. I could probably get better spool by clamping the WG DC to 100% until a few psi before target like you guys do with your megasquirt or like a ball/spring MBC.

2000 0.0
2200 1.0
2500 2.0
2750 3.0
2950 4.0
3050 5.0
3200 6.0
3325 7.0
3425 8.0
3525 9.0
3625 10.0
3750 11.0
3850 12.0
3950 13.0
4000 13.3

I describe this as 'extremely laggy' haha. ::sigh::
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