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Location:
Melbourne
Registered:
October 2003
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Recent Dyno Experience... Strange and Bizzare
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Thu, 03 March 2005 10:34
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Attending a recent toymods arranged dyno day I put my car on the rollers to see what power figure i might be getting...
After the dyno run I got my slip saying i had got 86.6kw at the Wheels...
This was just with a 2.25" exhaust and a redback muffler...
Now i had a few wierd measurements on the dyno that i'm still tryin to understand... My O2 Sensor went a bit Spastic at 5400rpm as u can see here
Theres just a couple of things i'm tryin to figure out..
What could have caused this spike in my O2 sensor..
A mate of mine noticed that i am missing a bolt on my EGR to the exhaust manifold, when the car is idling you can feel the exhaust coming out of the hole, could this have lowered my power output? The hole is above the o2 sensor...
I also have a worn rear engine mount, the engine really knocks when u lift the foot off the accelerator, but more so when u put ur foot down... Could this reduce performance?
Last thing on the list was... I went to a mates place after the dyno and i checked my timin (i made sure i crossed the diagnosis T And E1 connections) and to my suprise i found the ignition timing to be on a very low 6 degrees. Standard timing it should be on 10 degrees, would this have caused a reduced performance as well?
Just wondering how extractors may increase kw at the wheels, 4-2-1 setup!!!
Cheers
Adrian
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Location:
Melbourne
Registered:
March 2004
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Re: Recent Dyno Experience... Strange and Bizzare
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Thu, 03 March 2005 10:51
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I told ya before, but could the operator have pulled the sensor out prematurely? It kinda drops to zero which would be a bit odd that high in the rev range.
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Location:
Melbourne
Registered:
October 2003
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Re: Recent Dyno Experience... Strange and Bizzare
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Thu, 03 March 2005 11:12
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| smashed_wombat wrote on Thu, 03 March 2005 21:51 |
I told ya before, but could the operator have pulled the sensor out prematurely? It kinda drops to zero which would be a bit odd that high in the rev range.
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Man i cracked up laughin when u said it to me in person...
It went something like this "It was probably because the operator pulled out Prematurely"....
Boy how could u NOT take that wrongly....
But yeah it could be ur right.. i'll have to check the video of the dyno run.. i'm pretty sure he stayed there till the end.. i'm thinkin thats when the o2 sensor and the premapped fuel maps clashed...
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Location:
Rosanna, Melb
Registered:
June 2002
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Re: Recent Dyno Experience... Strange and Bizzare
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Thu, 03 March 2005 11:15
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The oxy sensor they were shoving in your tailpipe (before removing it prematurely) was having some issues on the day. A few guys got AFR spikes or had it go dead completely. So those spike are nothing to worry about.
Yes, that low timing advance will probably affect power a bit, but I am not 100% how the factory computer will deal with that. If you advance it just be wary of pinging.
Hen
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Location:
Melbourne
Registered:
March 2004
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Re: Recent Dyno Experience... Strange and Bizzare
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Thu, 03 March 2005 11:32
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| TRD-ST162 wrote on Thu, 03 March 2005 22:12 |
It went something like this "It was probably because the operator pulled out Prematurely"....
Boy how could u NOT take that wrongly....
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but only cos ur car peaked too early, was it your first time... on the dyno?
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Location:
Colac, Victoria
Registered:
May 2002
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Re: Recent Dyno Experience... Strange and Bizzare
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Thu, 03 March 2005 12:17
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pesky dyno virgins - always peaking too early ... but then again - they always come back for more and get better each time!
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Location:
Melbourne
Registered:
June 2004
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