Thread: How to make your fuel and timing maps AKA "TP/LOAD" scales

Hey blo0d, that is a nice graph you have there. Is that N/A? And is that an engine with VVL?

If TP follows pressure, how do we explain the huge spike at the beginning of the pull, and how do we explain that it has that typical rise and fall of an engine efficiency graph?
I will admit, I was not expecting it to be nearly as flat or as high down in the lower RPM range. I'm curious what Vadim's DE stuff will look like.


Not necessarily. Not if you don't make more torque with that boost. Not if it is just hot air.
Maybe I'm being too nitpicky...

Here is a perfect example. This is NA Roller Rocker, with stock RR manifold (doesn't flow all that well).

RPM	TP

2625	64

2725	63

2812.5	63

2887.5	63

2987.5	64

3075	63

3175	63

3250	62

3325	62

3400	61

3512.5	61

3587.5	62

3687.5	62

3837.5	63

3937.5	65

4062.5	66

4175	66

4275	66

4350	67

4437.5	67

4562.5	68

4675	69

4725	71

4837.5	71

4937.5	72

5025	72

5112.5	72

5212.5	72

5300	72

5425	73

5512.5	73

5612.5	73

5687.5	73

5775	73

5862.5	73

5962.5	73

6012.5	72

6112.5	72

6187.5	72

6287.5	71

6375	71

6437.5	70

6487.5	69

6550	69

6637.5	68

6712.5	67

6775	67

6837.5	67

6937.5	66

7012.5	65

7050	65

7087.5	64

7187.5	64

7212.5	63

7250	63

7325	62

7337.5	62

7475	61

Here is a DET one.

RPM	TP

3462.5	74

3612.5	82

3775	93

3975	97

4162.5	95

4437.5	97

4687.5	100

4875	100

5100	101

5312.5	102

5487.5	101

5825	102

6025	96

6212.5	93

6550	89

6750	85

6900	84

7037.5	83

7112.5	81

7262.5	80

7325	79

How about a visual representation against Horsepower and Torque? In all of these TP is in the Boost column.


NA RR with stock manifold


NA RR with Lowport manifold + tuning


NA VE


Here is a DET with T25 at 7psi



Discuss away!

*Facepalm* If you are going to call me retarded at least be right.

2.26 psi is 44 in your log... That IS pressure. Look again.

Also stop trying to talk down to me. I've been around working on this stuff longer than you. I was using hex editor before nistune or any of these other tuning programs even existed. I know for a fact that if you ORGANIZE your data you will see it proves you wrong. Look at Vadim's... That is how my data used to look when I ran all the variation of ecu I ran with MAF back in the day.

I'm not going to ban you for calling me retarded when you are wrong.

No brain fart... Just more experience.

- - - Updated - - -

Thank you @Vadim and @blo0d for showing data in a format that proves the point that is beind discussed.

Vadim, your first log shows TP varying by 12 points or a 16.4% deviation. While I assume kPa probably deviated by the typical 1-3%. Good stuff right off the bat.
The boosted examples are a bit harder to dissect without known pressures, but did that T28 at 7 psi example hold 7 psi steady and all the way to redline?

If so, it shows at least a 22.5% deviation in TP readings with what I'm assuming would be the typical 1-3% pressure deviation. (That is with leaving out the low TP reading of 74 as an outlier. The TP deviation would be 27.5% if it is included.)

You lied to me!

Also just realized I actually have a maf based VE sitting in driveway... Doh. Brain fart.

Yup that's T25 with 7psi from 3500 rpm to past 7k RPM. Once I get my MAP sensor properly logging I'll have more data, too bad it will be only boosted data though.

Interestingly enough, it looks like TP lags behind the TQ curve. In NA examples it almost looks like TP follow HP instead of TQ. With boosted example it's definitely not HP though.

Just the tip.

Good lord, first we have vacuum/boost correlating with TP and now we have TP correlating with torque. If that is the case you would know how much torque I'm making just by giving you the TP log, and I doubt you get anywhere near.

Just look at Blood and Vadim datalogs, the TP does not follow the torque curve.

TP and Torque follows as closely together as these graph. Sorry Benfenner, hope you don't mind me using your link.

http://i.imgur.com/7bE8unP.jpg

WOW stop being a lawyer, there are little discrepancies, not all the time does that data line up perfectly because of sample rates now look right under that and you see -0.93 you are allowed to use your better judgement, YOU FOUND ONE DISCREPANIE OUT OF HOW MANY? LOL look at the trend if looks like a skunk smells like a skunk its a damn skunk.


And not to mention you pointed out the area that my map sensor is not even intended to read and that positive pressure its a NA map sensor anything above zero psi is reliable on my sensor, now go look at all my vacuum logs and and there 99% spot on.

Here is every instance that 44 TP was logged, SMH you stretching for something you cannot reach.