Subject	That's what the VQ table is for....
Posted by	sorka on November 18, 2005 at 10:30 AM
	This message has been viewed 145 times.
In Reply To	There isn't even a linear relationship between AIRFLOW and posted by Z-Jay (Edmonton, AB) on November 18, 2005 at 10:08 AM
Message	It's totally non-linear, which is why you have to index and interpolate (which is exactly what the ECU does) to get actual airflow. And as Ash stated, there's not a linear relationship between airflow and power. However, looking at MAF voltages before and after a mod is very useful in determining effectiveness of that mod. It would be impossible to estimate exact power increases due to MAF increases at the same RPM, but you can get in the ballpark.
Follow Ups	Anyone have MAF readings from your dyno runs? - sorka 22:45:53 11/17/05 Tons of datalogs. Here you go (from the data we collected - Ash's Z 23:31:26 11/17/05 Thanks....nice info - Seb (Specialty-Z) 01:22:02 11/18/05 Give me a moment and I'll export the data and plot it (n/m) - Ash's Z 01:24:15 11/18/05 Re: Give me a moment and I'll export the data and plot it (n - Seb (Specialty-Z) 01:26:57 11/18/05 Here it is. - Ash's Z 01:53:48 11/18/05 Re: Here it is. - Seb (Specialty-Z) 01:59:03 11/18/05 Nah, I'll spend the time on them as my progression in - Ash's Z 02:03:44 11/18/05 Re: Nah, I'll spend the time on them as my progression in - Seb (Specialty-Z) 02:11:20 11/18/05 Yeah, I'm going to bed.. Its 3AM here.. I'll send them over - Ash's Z 02:15:59 11/18/05 My dual MAF setup never hit higher than 3.82v - 2960cc of fury (Houston) 00:39:54 11/18/05 Anywhere from 17-20 degrees of timing on 93 is fine. (n/m) - Ash's Z 01:18:25 11/18/05 What kind of boost pressures would you recommend him - Seb (Specialty-Z) 01:24:22 11/18/05 I think you are confusing CAS timing vs. ignition timing map - Ash's Z 01:56:41 11/18/05 Re: I think you are confusing CAS timing vs. ignition timing - Seb (Specialty-Z) 02:07:50 11/18/05 Yes I am referring to the actual timing maps, my CAS - 2960cc of fury (Houston) 08:52:46 11/18/05 I can email you my log in excel format if you would like (n/m) - 2960cc of fury (Houston) 00:41:07 11/18/05 Any single POP data? - sorka 01:04:36 11/18/05 Something wasn't right with that data.. The MAS maxes - Ash's Z 01:16:40 11/18/05 Um..... - sorka 01:41:22 11/18/05 Sure sign of a boost leak there.... Your MAS voltage - Ash's Z 01:58:00 11/18/05 No boost leak... - sorka 02:05:21 11/18/05 Re: No boost leak... - sorka 02:12:36 11/18/05 Re: Something wasn't right with that data.. The MAS maxes - sorka 01:43:53 11/18/05 4.54 volts single pop == 3.67 volts dual pop. - sorka 02:47:20 11/18/05 Check out this data before and after SS DPs.... - sorka 01:37:52 11/18/05 You math isn't correct as there isn't a linear relationship - Ash's Z 02:00:51 11/18/05 Yes, I know that.... - sorka 02:07:00 11/18/05 Take it to the dyno and show me a 29HP increase. (n/m) - Ash's Z 02:09:50 11/18/05 Re: Take it to the dyno and show me a 29HP increase. - sorka 02:16:19 11/18/05 BTW, volumetric efficiency is unrelated to boost - it is a - Ash's Z 02:14:35 11/18/05 Which is why I made the comparison before and after at the - sorka 02:28:43 11/18/05 There isn't even a linear relationship between AIRFLOW and - Z-Jay (Edmonton, AB) 10:08:34 11/18/05 That's what the VQ table is for.... - sorka 10:30:33 11/18/05
Post a Followup	You cannot reply to this message because you are not logged in.