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Old 08-03-2006, 09:40 AM   #51
Jaxx
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i am wondeing if its not the uppipe cat i too am having simmilar stage 2 difficency proublms with the LGT
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Old 08-03-2006, 11:57 AM   #52
Airboy
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I see that dip in two '06 WRX and a STi here in Calgary.
The WRXs are running 91 (which supposed to be crap like California gas) with Cobb OTS stg2 maps
The STi is using 94 gas (with ethanol) with OTS Cobb stg map

For the STi, I logged (at least I think I did) the Advance Multiplier and did not see a change at the 'transition' area.



Quote:
Originally Posted by drees
See that big dip in timing at 3.6k in your dyno chart? The ECU saw significant detonation there. Not good. At the very least, you should be running the CA-91 map, but I doubt that will totally fix it.

From what I've seen, Cobb seems to run the cars a bit too lean right when boost hits with their OTS maps for CA fuel. They seem to be able to get away with it in other states.

I had constant pinging problems with my Cobb Stg1 on full throttle which would only go away after multiple pulls to let the ECU learn. I gave up and went back to stock fearing for my engine's life. The AP is a good product, but the OTS maps suck for CA. Even the so-called CA91 maps are too much for a lot of cars here. I don't think I would have been able to hear the pinging with the Prodrive oval-tip I have on now, so if you have a non-stock muffler, you could be pinging and not hear it. Datalogs will readily show how happy your engine is.
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Old 08-03-2006, 12:04 PM   #53
drees
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Quote:
Originally Posted by Airboy
For the STi, I logged (at least I think I did) the Advance Multiplier and did not see a change at the 'transition' area.
The AM usually stays fairly constant if the ECU hasn't been reset recently.

But KC (which AM limits) will drop if the ECU hears knock or heard knock at that RPM/load point before and it does in your bottom pic.

Now, you can't always be 100% sure that a small drop in KC means the ECU is pulling timing without seeing the KC maps, but in your case the KC drops 4 points (1 KC = 1* ignition timing) which definitely isn't normal. Especially when it drops off so sharply.

In your other chart you notice that even the stock WRX is pulling timing. Like AMS noted, even stock WRXs have a tendancy to ping on CA91 or equivalent gas.
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Old 08-03-2006, 06:37 PM   #54
Umphreys448
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Find a friend with a stock wrx and drag him. If you win, blame it on the dyno. If he wins... well...
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Old 08-03-2006, 07:37 PM   #55
ghibli99
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Quote:
Originally Posted by drees
See that big dip in timing at 3.6k in your dyno chart? The ECU saw significant detonation there. Not good. At the very least, you should be running the CA-91 map, but I doubt that will totally fix it.

From what I've seen, Cobb seems to run the cars a bit too lean right when boost hits with their OTS maps for CA fuel. They seem to be able to get away with it in other states.

I had constant pinging problems with my Cobb Stg1 on full throttle which would only go away after multiple pulls to let the ECU learn. I gave up and went back to stock fearing for my engine's life. The AP is a good product, but the OTS maps suck for CA. Even the so-called CA91 maps are too much for a lot of cars here. I don't think I would have been able to hear the pinging with the Prodrive oval-tip I have on now, so if you have a non-stock muffler, you could be pinging and not hear it. Datalogs will readily show how happy your engine is.
Thanks for the good info, and yes, I realized at the meet that I hadn't flashed the CA91 map yet. I'm running it now, and it might just be me, but I seem to have less pop and gurgle. I plan on getting the car tuned in the near future once the VF39 goes in, and then I'll hop back on the MAHA to see what's up.

-Mike
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Old 08-04-2006, 05:30 PM   #56
WRXedUSA
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Get rid of the stock catted uppipe especially since you are running stage 2. That's a accident waiting to happen.
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Old 08-04-2006, 05:40 PM   #57
CynicX
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I still think its the typical MAHA dyno reading....time and time again I see extremely low MAHA numbers. Like I said before, nothing WRONG with that. Just some dynos read higher...

You want something acturate that you can compare to stock then pull the motor and send it back to Subaru and let them test it on a crank dyno....or find a friend with a stock wrx to run on the MAHA (probably easier )...

You want inflated bragging numbers find a dynopack....
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