AFR Table Help

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AFR Table Help

Postby maych87 » Wed Sep 13, 2017 11:21 am

I have a porsche 911 with a 3.6l aircooled engine in it running sequential injection. I had a shop do the tune on it. I do not think they did a great job. I am concerned about how they set up my afr table. I am still having issues at idle and decel, as well as it seems to rich in cruise. I want to autotune those areas but the afr map looks strange to me. Can someone have a look and show me how it should look if thats not correct. Attached is my msq
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2017-09-12_15.06.03 test change auto tune ve idle.msq
msq
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Re: AFR Table Help

Postby billr » Wed Sep 13, 2017 11:37 am

I can't open that MSQ, don't have the INI file.
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Re: AFR Table Help

Postby benckj » Wed Sep 13, 2017 11:43 am

Why not use the tool function under AFR table and see what is calculated for your engine? Can be used to compare what you have now for differences.

In my experience the Tuners have not used AFR target table and auto tune function. They seem to create VE values and plug and chug numbers until they think it meets general AFR values. This is fine to start but road running produces best tune.
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Re: AFR Table Help

Postby maych87 » Wed Sep 13, 2017 1:57 pm

I have never noticed that table generator thanks. The table it generates is way different from my current table that the tuner set up. What is an INI file that is not allowing bill r to open the msq? Two other questions

1. For the HP and TQ numbers should I enter the numbers from factory specs or from the dyno sheet i received at the shop. I'm concerned that because different dynos yield different results that the data would be incorrect that is generated from the table generator if i use dyno specs?

2. Does the table generator pull other information from the settings of the vehicle to come up with those numbers or are the strictly generated from the parameters entered in the table generator?
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Re: AFR Table Help

Postby billr » Wed Sep 13, 2017 5:32 pm

Your INI that I am missing is "MSFormat0565.24" If you search on your HD you should find it somewhere. Or, go to the TS forum and ask Phil to add it to the server.
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Re: AFR Table Help

Postby maych87 » Thu Sep 14, 2017 12:00 pm

benckj wrote:Why not use the tool function under AFR table and see what is calculated for your engine? Can be used to compare what you have now for differences.

In my experience the Tuners have not used AFR target table and auto tune function. They seem to create VE values and plug and chug numbers until they think it meets general AFR values. This is fine to start but road running produces best tune.
Jim


1. For the HP and TQ numbers should I enter the numbers from factory specs of the car or from the dyno sheet i received at the dyno shop. I'm concerned that because different dynos yield different results. if they have different results they would come up with two different tables if i use dyno specs? What would produce the most accurate afr table from the table generator?
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Re: AFR Table Help

Postby turbo conversion » Thu Sep 14, 2017 1:02 pm

If it is not highly modified I would use the factory numbers.

How much different are the dyno numbers vs the factory numbers?

If not much I don't think it would not make a huge difference between the two.

Or you could always just split the numbers.

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Re: AFR Table Help

Postby maych87 » Thu Sep 14, 2017 1:20 pm

turbo conversion wrote:If it is not highly modified I would use the factory numbers.

How much different are the dyno numbers vs the factory numbers?

If not much I don't think it would not make a huge difference between the two.

Or you could always just split the numbers.

David



My car has bigger injectors new intake full exhaust so it is not that highly modified.

Stock is 247hp @ 6100 &
228tq@ 4800

I made on a dyno jet AWD

255hp @ 5700 &
248tq @ 4950 at the wheels. my car is AWD

The peak rpm is different as well. Do you still think I should split the hp/tq and the rpm down the middle? It seems very imprecise.


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Re: AFR Table Help

Postby turbo conversion » Thu Sep 14, 2017 1:50 pm

With the mods you have I would go with the dyno numbers.

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1976 Datsun 280Z L28ET Garrett GT35R T3-T04E stage3 50 trim 63 A/R housing custom grind cam 2000-6000 rpm 440cc injectors intercooled 18 lbs. boost
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