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XCELR8
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How to setup gears tab for manual

Hi,

For a manual transmission there is the gear tab which appears to provide a way to calculate the gear of the car. I'd like to know exactly what items I set up here to get that calculated gear. The gear ratio calculation graph is strange as it shows half gears like 1.5, 2.5, etc and the vertical dimension units are also strange i.e. 0.0, 10.0, 20.0 and so on up to 250.0.  If my 1st gear ratio is 2.48 what do I enter in this graph? Do I just leave the half gear settings at 0.0? Does the rear gear ratio have to be entered anywhere? Thanks!

AEM_NS
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This graphic should get you

This graphic should get you most of the way there:

In this setup, the EMS is comparing engine speed to vehicle speed which is where the Gear Ratio number comes from.  The Gear Ratio table is where you then assign what ratios equal what transmission gear.  GearCal M is a multiplier that gets applied to Gear Ratio.  Adjust it so you get very high values in first gear (150-250) and then everything should fall into place from there. 

There is a wizard for this but it uses a strategy that doesn't work very well.  It's easiest to input these values manually.

XCELR8
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Thanks, but it still makes

Thanks, but it still makes little sense to me. What would the table be filled in for a MKIV Supra TT 6 speed manual which has the following gear ratios:

First:  3.827
Second: 2.360
Third:  1.685
Fourth: 1.312
Fifth:  1.000
Sixth:  0.793
Final Drive: 3.266

Let's take just the First gear setting in that table as an example. What is the vertical value in the table for gear 1.0 and how do you calculate it? Also, again, why are there half gear settings along the horizontal axis?

XCELR8

AEM_NS
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The acutal transmission gear

The acutal transmission gear ratios are of little help.  You need to setup the options as shown but GearCal M is variable at this point.  As I explained before, the EMS is comparing engine speed to vehicle speed which is where the channel Gear Ratio comes from.  Once you know what gear ratio values you get in each gear, you can then populate the Gear Ratio Calc table to say which ratios equal which gear you're in.  

Do this: setup the options as shown but leave GearCal M at 1.  Now, start a log and run the car from min rpm to max rpm in first gear.  Adjust GearCal M until your logged Gear Ratio values in first gear range somewhere from 150-250.  Once this is done, you can then log Gear Ratio for each gear running from min rpm to max rpm.  Then, populate the table as shown with the Gear Ratio ranges for each gear.  The half gear positions don't mean anything.  It's just an additional break point between gears.  

Instead of thinking about it too much just try doing it.  It's actually very, very simple.  

Turbonutter
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There is a video of how to
AEM_NS
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That's for an Infinity

That's for an Infinity whereas this thread is about the Series 2 although the procedures aren't that much different.

DereckR
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I am trying to setup through

I am trying to setup through the wizard and I don't quite know how to do it through the wizard.

Any help?

AEM_NS
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The wizard is a little dated

The wizard is a little dated and doesn't really work very well.  Try using the strategy outlined above.  

boostedj30
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Great info, I'd have been

Great info, I'd have been messing with that Gear wizard and scratching my head.  Can you clearify a couple things though?

If the gear ratio is basically RPM÷Vehicle speed, multiplied by GearCal M, is it necessary to run all the gears from min to max rpm?  Won't this calcution be approximately the same throughout the gear?  Can you just run the car up to 3000rpms for example in each gear to get tha data required?

And for the half gears, I know you said they mean nothing so could you Interpolate between gear points? Or should they be lower than the following gear?

 

Thanks

boostedj30
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I have logged my Gear ratio

I have logged my Gear ratio on all my gears, and 1st gear is logging at 236 with a GearCal M of 10.  After plotting these logged numbers for each gear in the gear table, I still dont see the correct gear selection in Gear Calculated channel.  I am using Gear Cal1 set at T3 and GearCal 2 set to T1.

Just for kicks I tried the gear wizard. It didnt work at all.

I see the comment above saying the in between gear points aren't important, so can I interpoate bewteen them? Or can they be just anywhere??

 

What am I missing here?

boostedj30
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Also i tried switching Cal1

Also i tried switching Cal1 to to T1 and Cal 2 to T3, but my numbers are backwards, 6th gear is 240+ and 1st is 50ish...

AEM_NS
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Post your cal and a log

Post your cal and a log showing all the calculated gear ratios in each gear.

boostedj30
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I have all  the gears good

I have all  the gears good now, except 6th. it still shows its in 7th gear.

 

this is my log:

 

This is highlighted on 6th gear.

 

This are my settings in aemtuner:

 

What did i do wrong?

Kurt
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Gear Calculated = 1 when

Gear Calculated = 1 when current Gear Ratio channel value is within the bounds of 1 and 1.5 in the Gear Ratio Calculation table.  

From your data pictured, these values should work for you:

1 = 25, 1.5 = 30, 2 = 42, 2.5 = 46, 3 = 62, 3.5 = 67.............    6 = 135, 6.5 = 147.

Note the high and low recorded value for each gear from your data and add a small buffer.

AEM_NS
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What did you do wrong?  Your

What did you do wrong?  Your table doesn't discern a difference between 6th and 7th gear.  Give 7th gear ratios that aren't acheived while you're in 6th gear.

boostedj30
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ok thanks, ill try that!

ok thanks, ill try that!

boostedj30
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I just left it straight

I just left it straight across like you exampled here:

 

I understand this is only an example, and the figures arent correct, but i did notice the 6th gear figures go straight across.  

DereckR
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I have still yet to get this

I have still yet to get this correct. When I do the data logs of the gear ratio i get lines like RPMS not stepping stones like shown above. Is there something I am doing wrong?

AEM_NS
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That example was for a five

That example was for a five speed transmission.  

AEM_NS
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Ok, I've gone ahead and

Ok, I've gone ahead and edited this thread by removing some posts.  If you're going to post with comments or questions, please be sure to pay attention to what product forum you're posting in.  We had Infinity users asking questions about setting up gear and they were getting information for the Series 2.  I know everyone is either trying to help or get help, but it's only more confusing when you don't specify what product you're working with or post in the wrong section.  

 

AEM_NS
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What are the gear ratios

What are the gear ratios ranges you get in each gear?  1st gear is what through what?  2nd gear is what through what?  

luisderoux
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I am having a problem with my

I am having a problem with my gear cal. It shows gear cal voltage stuck at 5.09. Greetings

http://imgur.com/a/JnP5V

Panama - Evo 8 - Aem V2

AEM_NS
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Is TC Gear Ratio set to ON?

Is TC Gear Ratio set to ON?

luisderoux
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Yes indeed.

Yes indeed.

Panama - Evo 8 - Aem V2

AEM_NS
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See if TC Gear From Selector

See if TC Gear From Selector is on or off. If on, turn it off.

tufinside
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To obtain vehicle speed to

To obtain vehicle speed to populate this specific type of graph, is it preferrable to use wheel speed from the diff, vehicle speed from transmission, or use a GPS module to get accurate speed?