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Old 07-18-2012, 09:07 PM   #1
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Default 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.



First, 165kpa log datalog:


2nd, 174kpa run:


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".
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Artech 1.6 at 10 psi-scan0001.jpg   Artech 1.6 at 10 psi-dynorunmlv.jpg   Artech 1.6 at 10 psi-dynorun2mlv.jpg  
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Old 07-18-2012, 09:11 PM   #2
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ouch...
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Old 07-18-2012, 09:14 PM   #3
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you look like you're running *decent* amount of timing...
is your timing synchronized correctly?
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Old 07-18-2012, 09:20 PM   #4
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Wow. Not what I expected. Is this a Greddy turbo?
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Old 07-18-2012, 09:24 PM   #5
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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:

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Old 07-18-2012, 09:35 PM   #6
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timing map looks good
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Old 07-18-2012, 09:44 PM   #7
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I don't like this dyno.
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Old 07-18-2012, 10:14 PM   #8
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Quote:
Originally Posted by 18psi View Post
timing map looks good
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.
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Old 07-18-2012, 11:15 PM   #9
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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.
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Old 07-18-2012, 11:20 PM   #10
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Edit:
I changed my mind, don't load that table. Did you hit MBT?
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File Type: table TryThisOldMan.table (2.7 KB, 265 views)
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Old 07-18-2012, 11:41 PM   #11
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Quote:
Originally Posted by hustler View Post
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
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Old 07-19-2012, 01:07 AM   #12
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Quote:
Originally Posted by Faeflora View Post
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.
Not sure about how good your gayz gas is, but over here besides e85 we only have CA 91 camel ****. On said camel **** 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
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Old 07-19-2012, 02:16 AM   #13
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Quote:
Originally Posted by 18psi View Post
Not sure about how good your gayz gas is, but over here besides e85 we only have CA 91 camel ****. On said camel **** 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.
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Old 07-19-2012, 02:36 AM   #14
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Quote:
Originally Posted by curly View Post
dyno "dream crusher".
update your sig? I am only 157....
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Old 07-19-2012, 09:14 AM   #15
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Quote:
Originally Posted by mgeoffriau View Post
Wow. Not what I expected. Is this a Greddy turbo?
exactly what I expected considering his exhaust setup.
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Old 07-19-2012, 09:32 AM   #16
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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.
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Old 07-19-2012, 09:33 AM   #17
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will adding timing decrease your backpressure?
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Old 07-19-2012, 09:35 AM   #18
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Quote:
Originally Posted by hustler View Post
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.
Not 3", see above.
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Old 07-19-2012, 09:37 AM   #19
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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
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Old 07-19-2012, 09:43 AM   #20
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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.
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