Dyno'd car today..
10-01-2012, 11:06 PM
#62
I don't think you guys are understanding what I'm saying.
If a car in 70 runs on a dyno what happens? Less heat soak, less kr if any and cooler combustion
If a car runs in hotter weather what happens? It'll get heat soak more often, get more kr, have shittier combustion temps.
So what happens is the actual car looses power.
The dyno can not correct the fact of timing lost due to temps. It can factor in the temp, but it can not ask the engine or the ECM how much power it actually lost due to knock retard and Etc.
If a car in 70 runs on a dyno what happens? Less heat soak, less kr if any and cooler combustion
If a car runs in hotter weather what happens? It'll get heat soak more often, get more kr, have shittier combustion temps.
So what happens is the actual car looses power.
The dyno can not correct the fact of timing lost due to temps. It can factor in the temp, but it can not ask the engine or the ECM how much power it actually lost due to knock retard and Etc.
10-02-2012, 02:29 AM
#64
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10-02-2012, 04:39 AM
#65
So much fail. I dont even know where to begin... His AFR alone im not super shocked it put down low numbers. But it could be a heart braking dyno but admitting the tune was not spot on only hert's even more.. IMHO his bad/pig rich tune hert him more than the hot temps did. As ive put many a car on the dyno in 110+ degree weather(at UTI rancho in the summer) and with alittle tweaking was able to to meet or beat cold weather dyno #'s and even break records given enough time to tune and tweak. But this was a dyno run only no tuning. Steve GET TO WORK!
10-02-2012, 01:03 PM
#66
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I'm sure the 94 ambient temp played a small role in the low numbers but I know its all in the tune. Like they say, leaner is meaner. Again I'm on a zzp canned tune for the moment
10-02-2012, 03:20 PM
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Not having the time to tweak/tune makes it clear that even in cold weather i dont think he would have done better. AFR is the most crucial thing when on the dyno, Having the thermostat open early and the fan's to come on early are just easy way's of negating the heat soak on a hot day in any car. Also adding timing can produce great results even if it's over 100 out. The outside temps didnt matter as can be proven by the 210 WHP stock IRL which is right where it should be seeing as it's rated at 205/200 at the crank and put more than that to the tires which is normal even given drivetrain loss and outside temps as they are underrated in stock form. His setup and tune is what made low#'s IMHO. Steve get to work buddy! One day ill have an IRL for you to work on! There so cheap now lol! And why not throw the racecar prius on the roller's....?
10-02-2012, 10:29 PM
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