MDP questions? ?

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Jan 21, 2009 | 09:49 PM

#16

evoredy

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From: San Jose, CA

just logged the MDP:

Code:

TPS	Load	RPM	AirFl	MDP	MAP_EM	MAFS_REAL
14.51	43.44	1000.00	49.34	28.64	135.53	22.11
14.51	42.81	1000.00	51.20	28.25	134.74	22.51
14.51	41.56	1000.00	49.14	28.44	134.74	22.80
14.51	42.19	976.56	46.78	28.25	134.74	22.41
14.51	42.50	976.56	50.03	28.64	135.53	25.45
47.06	48.13	1007.81	100.05	47.21	198.92	51.50
100.00	106.88	1378.91	192.24	46.82	200.49	55.82
100.00	107.19	1898.44	235.29	46.44	192.63	44.32
14.51	68.44	2542.97	168.65	26.12	147.32	17.79
14.51	33.44	2640.63	76.46	17.80	108.90	14.55
14.51	27.19	2515.63	99.36	15.87	101.82	12.38
14.51	23.13	2320.31	59.07	15.28	76.66	12.38
14.51	23.44	2136.72	56.71	15.48	101.03	11.40
14.51	22.50	1972.66	51.99	16.06	103.39	12.38
14.51	23.75	1808.59	49.14	16.64	104.96	13.76
14.51	26.56	1707.03	51.01	17.22	107.32	14.45
14.51	27.50	1589.84	51.70	17.99	110.47	15.33
14.51	30.00	1480.47	52.68	19.35	112.83	17.10
14.51	33.13	1378.91	56.51	20.32	115.09	20.34
14.51	39.69	1304.69	62.70	21.86	117.45	21.92
14.51	40.63	1238.28	61.43	22.64	119.80	24.87
14.51	47.81	1144.53	64.87	23.99	121.38	27.32
14.51	52.81	1007.81	62.02	25.93	126.88	29.48
14.51	56.88	914.06	61.23	27.67	133.17	30.37
14.51	57.81	957.03	64.37	28.64	135.53	31.45
14.51	59.69	847.66	59.46	30.57	141.72	34.10
14.51	64.69	832.03	62.31	31.15	144.87	35.38
14.51	66.88	808.59	63.00	32.31	148.80	34.60
14.51	65.63	871.09	65.75	31.73	145.65	33.02
14.51	62.19	957.03	67.91	31.15	144.87	32.73
14.51	61.56	933.59	66.14	30.96	142.51	29.58
14.51	55.94	980.47	62.51	29.99	140.94	30.07

meh i guess it works lol.

one of the reasons i'm late/don't post logs/code all the time is the BS i went through to make this all align up.

Jan 21, 2009 | 09:56 PM

#17

Appauldd

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See how the MDP is positive though? Shouldn't it be reading the negative vacuum condition?

Jan 21, 2009 | 10:00 PM

#18

evoredy

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From: San Jose, CA

Quote:

Originally Posted by Appauldd

See how the MDP is positive though? Shouldn't it be reading the negative vacuum condition?

the PSI identifier in EvoScan 2.6 is not correct i guess. should be like random_number_scaling lol j/k.

Jan 21, 2009 | 10:04 PM

#19

Appauldd

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That is what I have been trying to get at. EvoScan does not read the MDP correctly....I think.

Jan 21, 2009 | 10:08 PM

#20

evoredy

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Quote:

Originally Posted by Appauldd

That is what I have been trying to get at. EvoScan does not read the MDP correctly....I think.

you should be able to edit stuff. you would have to have a another logging source to compare and then correct scaling values with. i'm not sure if someone has done this yet as i have not searched.

OT: thats how the map to maf values look when logged correctly. notice that the MAF is being used the whole time for this log as the value is always lower.

Jan 22, 2009 | 08:03 AM

#21

fostytou

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From: Aurora, IL

The proper eval in evoscan for the JDM MAP is

Code:

0.19347*x-14.3

(obviously replace 14.3 with whatever you standard ATM is

Considering the JDM MAP is a 3 bar and stock is 1 bar, I'd assume

Code:

0.19347 / 3 * x - 14.3

should get you pretty close. Then just log with the car off if you know your standard ATM and you should be able to adjust the multiplier accordingly...

Obviously please post the results if you get them.

If that doesn't help maybe looking at MRfred's "log a JDM map" thread can help. You could take a look at some of the values in the tables there to see if you are close.

Jan 22, 2009 | 12:08 PM

#22

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by fostytou

...

Considering the JDM MAP is a 3 bar and stock is 1 bar, I'd assume

Code:

0.19347 / 3 * x - 14.3

...

That will get you pretty close for psi units.

This should be a little closer:

Code:

0.36*0.19347*x - 14.5

The stock MDP sensor is a MAP sensor as far as I can tell from my testing. The "14.5" value needs to get adjusted for your altitude. Higher altitude requires a lower value. There are tables on the internet to get the proper value for your altitude.

Jan 22, 2009 | 08:21 PM

#23

Appauldd

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I adjusted Boost (MDP) in EvoScan to this 0.36*0.19347*x - 14.3

What other settings need to be changed in EvoScan....i.e. Gauge Min and Max, and Chart Min and Max?

Jan 22, 2009 | 09:10 PM

#24

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by Appauldd

I adjusted Boost (MDP) in EvoScan to this 0.36*0.19347*x - 14.3

What other settings need to be changed in EvoScan....i.e. Gauge Min and Max, and Chart Min and Max?

Nothing else needs to be adjusted unless you plan to make output show up as a gauge in EvoScan.

Jan 22, 2009 | 09:13 PM

#25

Appauldd

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Cool Beans ! ! THANKS

I will get to logging. Hopefully I can get the MAP to MAF to solve idle problems with hard intake pipes and big cams.

I am close.....so close.

Jan 26, 2009 | 07:57 AM

#26

Appauldd

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From: Northern KY near Cincy

IT WORKS ! !

I can now log vacuum conditions and boost up to about 2.2 PSI. This will help to try and get MAP to MAF configurations correct for idle with big cams and hard turbo inlet pipes.

THANKS a ton ! !