Dyno'd my car. WTF?

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#23
Ghostang said:
Yeah. Those numbers do seem low... I could have sworn I saw someone posting dynos for those cams and similar mods a while back and they were making 300-320, but I could be wrong. I want to say they made close to 280 or so with just the cams and stock headers + heads.
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If so, that would be bhp not rwhp.
 
#25
jstreet0204 said:
Without knowing the load percentage or MAF voltage you can't really say that for sure. After tip-in he runs about 14.7 (stoich) until he gets into the higher rpms. Depending on what load or VE he as at until 4k or so, this may be normal.
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:rolleyes: :lol:

Look at the graph. An all motor car should be around 13.5 to 13.0 flat depending on how picky the engine is. He must spend the cash on a tune to fix that air fuel ratio. It should be flat and straight across.
 
#26
mogs01gt said:
:rolleyes: :lol:

Look at the graph. An all motor car should be around 13.5 to 13.0 flat depending on how picky the engine is. He must spend the cash on a tune to fix that air fuel ratio. It should be flat and straight across.
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I know well what it should be at 100% load. Do you know what it should be at 80% load? All I'm saying is if he stepped on the gas late or if the car was not under 100% load during the entire run, it won't go as rich. The stabalized openloop fuel table is what drives the a/f ratio in open loop, and the x axis on it is load meaning it is load depended.
 
#27
Something similar to:

Hpp_8-copy.jpg
 
#28
jstreet0204 said:
I know well what it should be at 100% load. Do you know what it should be at 80% load? All I'm saying is if he stepped on the gas late or if the car was not under 100% load during the entire run, it won't go as rich. The stabalized openloop fuel table is what drives the a/f ratio in open loop, and the x axis on it is load meaning it is load depended.
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that is talking about variables that should not happen on a dyno session. It should be at WOT when doing the pull. I have never seen a dyno pull done at part throttle.
 
#29
mogs01gt said:
that is talking about variables that should not happen on a dyno session. It should be at WOT when doing the pull. I have never seen a dyno pull done at part throttle.
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Dyno shouldn't have been done in third gear either but it happens. Like I said without seing the actual datalog with the other variables like load and tps, you can't say where the a/f is supposed to be. To me it looks like he has not kicked out of closed loop until 4k.
 
#30
jstreet0204 said:
Dyno shouldn't have been done in third gear either but it happens. Like I said without seing the actual datalog with the other variables like load and tps, you can't say where the a/f is supposed to be. To me it looks like he has not kicked out of closed loop until 4k.
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any all the variables that could have happened at this dyno are all up in the air. It really looks like the place doing the dyno is a bunch of hacks.
 
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