Artech 1.6 at 10 psi
 

After helping a friend with some MS tuning on the dyno, apparently the "boss" was gone for the day, so I got two free runs on the dyno. Only changed boost, from 9psi to 10.5psi ish. Dyno and data logs below. I'm not terribly happy, but whatevers, I'll work on it.

https://www.miataturbo.net/attachmen...ine=1342656433

First, 165kpa log datalog:
https://www.miataturbo.net/attachmen...ine=1342656433

2nd, 174kpa run:
https://www.miataturbo.net/attachmen...ine=1342656433

Hmm, setup is pretty much in my signature, 3" downpipe choked down to a 2.5" cat and 2.5 crush bent exhaust, unknown health on the engine, hopefully the compression is higher than my boost.

Comments welcome, not sure where to go from here...the shop did name their dyno "dream crusher".

ouch...

you look like you're running *decent* amount of timing...
is your timing synchronized correctly?

Wow. Not what I expected. Is this a Greddy turbo?

SR20 T25.

I should double check both the timing belt and the timing light thingy, I just redid them and they were pretty spot on. Doesn't hurt to check. Timing map:

https://www.miataturbo.net/attachmen...ine=1342657498

timing map looks good

I don't like this dyno.

Explain.

That is some limp dick weaksauce timing for 10psi.

It still doesn't explain the 50hp gap between dyno'd hp and what it should be at.

Did the guy running the dyno have the right correction values in? If the engine is healthy, the exhaust is 3", then you should have made 50-75whp more.

Edit:
I changed my mind, don't load that table. Did you hit MBT?

Come on. Unless he shaved his head a foot he is like 6* away from MBT

Not sure about how good your gayz gas is, but over here besides e85 we only have CA 91 camel piss. On said camel piss 14-16* is about the max I'd run @ peak tapering up to about 18-19* at redline depending on turbo and setup.

More timing and the engine pulls a Faeflora

If you have 93 and its good quality, then nevermind

Ah, wow, ok. That explains your subaru timing map too.

I have no experience tuning CA 91.

update your sig? I am only 157....

exactly what I expected considering his exhaust setup.

Yeah, that non hi-flow cat and 2.5 isnt helping.

I'm running 93 octane all the time.

Hustler showed me his timing map and I split the difference between his and diy's ultra conservative base map. Should I go for something more aggressive? Playing with the timing with the NA car certainly showed what timing changes can do, it really liked 30*. I wanna be pretty safe though.

will adding timing decrease your backpressure?

Not 3", see above.

You need to listen to teh Brainz and increase VE instead of ramping up timing on a constipated setup. 3" all the way would be a good start. Then you can bump up timing another 6* like Fae is suggesting without much ill effect

Should pick up a large chunk of power

I'll keep that in mind, i also know how much choked. Exhaust adds heat, I wonder if I should be looking at my cat for cloggage. It's pretty old.