Miata Turbo Forum - Boost cars, acquire cats.

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-   -   GT2554 spool is horrible (https://www.miataturbo.net/general-miata-chat-9/gt2554-spool-horrible-23570/)

y8s 08-03-2008 07:05 PM

anyone have a 60mm compressor and housing they want to lend me?

8387supra 08-04-2008 01:24 AM

Why not go with an external wastegate?
Other turbo options?

Braineack 08-04-2008 09:59 AM


Originally Posted by y8s (Post 291745)
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 ;)

y8s 08-04-2008 10:35 AM

too small, need at least 60 trim on the T3.

Braineack 08-04-2008 10:37 AM


Originally Posted by y8s (Post 292003)
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 ;)

Savington 08-04-2008 03:50 PM

The moral of the story is that 3" exhausts are FTW.

ZX-Tex 08-04-2008 05:08 PM


Originally Posted by Savington (Post 292157)
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.

TurboTim 08-11-2008 11:26 PM

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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