Cobb AP dyno's

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Member

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Mazdaspeed 6

• Jun 11, 2010

• #1

Has anyone played with this feature on their cobbs?

I just tried it today and did back to back runs.

Current setup:
Fujita CAI, cobb <ACRONYM title="Cobb Access Port">ap</ACRONYM> stage 2 TIHfucai 93 ots map, custom 3" cat back exhaust, 3" race pipe. weighed 3630 with me and 1/4 tank of gas last summer.

set weight to 3629lbs, 3000-6000rpm run. I show 262.8hp at 5750rpm and 284tq@3750rpm. i did back to back runs and both came out equal except the 2nd run my tq was a tad lower. then i did a data log twice. I realize the data log and dyno not being exact same runs could change a lot but still figured it was better then no data logging.

Ambient temp = 71F
AFR = 11.17 at 5700rpm
Boost = 15.8psi at 5700 rpm
spark advance = 8 at 5700rpm
boost intake temp = 111F

 

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bova80

Member

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2007 Mazdaspeed6 GT

• Jun 11, 2010

• #2

ha that thing doesn't work at all. i've done it before and was like 450hp

 

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Member

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Mazdaspeed 6

• Jun 11, 2010

• #3

Yeah? i saw someone posted a thead at mazdaspeed forums and with similar mods to me he got 362 or something, except he had a speed 3. My results seem fairly realistic but probably a tad high.

 

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dougefresh_

Member

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2006 MS6 wwp

• Jun 11, 2010

• #4

bova80 said:

ha that thing doesn't work at all

Click to expand...

I agree... they're useless.

 

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Blendercloud

Member

Contributor

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2007 Mazdaspeed 6 Sport

• Jun 11, 2010

• #5

The issue with their usefulness is that it is nearly entirely dependent on weight transfer and gearing. If you were on a race kart without suspension and took off it would probably register as next to nothing. If you were in an old Miata it might register extremely high.

 

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funkytuqe

Member

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2003 Protege 5, 06 Mazdaspeed6

• Aug 6, 2010

• #6

Does that mean that the AP is equipped with an accelerometer to measure acceleration forces? I don't see how else that this could be done, but also would be a very rough estimate/calculation since road grade/wind/temp/air pressure would not be accounted for. I'm just curious how the AP measures this HP/TQ number regardless of accuracy.

 

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bova80

Member

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2007 Mazdaspeed6 GT

• Aug 6, 2010

• #7

its probably a rough calculation based off of the calculated load and mass air flow (g/s)

 

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KrGsMrNKusinagi

Member

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Mazdaspeed 6 GT

• Sep 30, 2010

• #8

Theres a Dyno of an MS6 with Cobb tune and boltons with meth injection making over 300 on the stock turbo..