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

y8s 07-17-2008 04:08 PM

and add mine :D

Braineack 07-17-2008 04:38 PM

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Originally Posted by y8s (Post 284271)
and add mine :D


here we go:

compuatic 07-17-2008 04:50 PM

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here we go

y8s 07-17-2008 05:12 PM

i tried to find a picture of the S3 manifold to compare Savington's to the rest but I gave up on the page when it tried to load 5 megs of thumbnails.

Braineack 07-17-2008 05:39 PM

mo, if anything, add some timing between 1500 and 30ooRPM and 100-150kpa

curious, what does your timing map look like?

compuatic 07-17-2008 05:43 PM

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This was also a suggestion made by Corky, This is what i'm using Scott, let me know your opinion...

paul 07-17-2008 05:48 PM

Why the fuck do i get the pink line?

Braineack 07-17-2008 06:20 PM


Originally Posted by paul (Post 284296)
Why the fuck do i get the pink line?


Cause you're a ------, alright?

Braineack 07-17-2008 06:21 PM


Originally Posted by compuatic (Post 284292)
This was also a suggestion made by Corky, This is what i'm using Scott, let me know your opinion...


if you look at FMs default map for a 1.6L turbo, you can see what I mean. This is the area I wanted to play with last weekend on the dyno....

http://www.boostedmiata.com/timing/fmtiming.jpg

compuatic 07-18-2008 02:50 PM

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So i went and made changes to my timing map. see the before and after below and then look at the before and after spool improvement. In summary, nothing... any thoughts or theories?

Braineack 07-18-2008 04:12 PM

get an ebc.....

y8s 07-18-2008 05:16 PM


Originally Posted by y8s (Post 283168)
simple test:
1. set overboost cut to 15 psi
2. remove vacuum line from wastegate actuator and plug vac line.
3. log that bish.


Originally Posted by Braineack (Post 284692)
get an ebc.....

if my test above (he says he did that) doesn't spool it any faster, an EBC wont do it either.

Braineack 07-18-2008 05:18 PM

true...do that test.

jayc72 07-18-2008 05:53 PM

I think the only thing to fix is this:


hollow stock cat and 2.25" racing beat exhaust.
I have a similar exhaust and similar spool numbers. OP has an EBC already.

compuatic 07-18-2008 06:13 PM

but you also have a smaller engine.

jayc72 07-18-2008 08:12 PM


Originally Posted by compuatic (Post 284735)
but you also have a smaller engine.

I think the exhaust is enough of a restriction. You'll probably see a larger gain than I will from a good exhaust setup.

samnavy 07-18-2008 08:26 PM

Sorry I'm late to this party. I'm running the SR20det T25, BegiSS dg downpipe, 2.5" test pipe, 2.25" Borlas. My spool looks exactly like yours comp.

Braineack 07-18-2008 08:56 PM

here's how sam's looks, compared to mine.

http://www.boostedmiata.com/dynos/sc...with_boost.jpg

JasonC SBB 08-02-2008 06:28 PM

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The spoolup data in the above compilation is a 2nd gear pull. Here's the data with my 4th gear data added/

ZX-Tex 08-03-2008 05:23 PM

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Great thread! Here is another one to add. I just hooked up my EBC today and am still tuning it so there is some overshoot and oscillation. The target boost is about 7.5 psi. This is a 4th gear pull on a hot 102 deg F day.

Setup
GT2560
BEGI cast manifold
BEGI stainless DP
2.5" exhaust: hi-flow metallic cat, straight through resonator, straight through muffler, all magnaflow
MS open loop boost control
GM boost solenoid
RPM Boost (psi)
2136 0.44
2378 3.53
2521 4.56
2864 6.91
3091 8.53
3184 9.11
3445 7.2
3694 8.09
3989 7.35
4294 7.64
4472 8.09

Here is a chart. Paul's spool is, well, absurd. Sav's looks great. Looks like mine is pretty good. I need to get that new clutch in so I can turn up the boost. The stock clutch is slipping fo sho.


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