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Post Info TOPIC: retard timing by rpm base not gear?


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retard timing by rpm base not gear?


hi all, like many i am very new to all the ecu flashing, I have a unique situation and was looking for a little input -

what i have:

gen 2

stage one turbo

65lb valve springs

i have a full cut auto transmission 1-4 (robinson cut)

i am not running a gear selector, the motor sits in a custom threewheeler frame

What i need - i would like to retard the timing starting at at 8500 rpm by like 3-4 degrees, when i look in the dragtools on the ecu editor - it shows the ignition retard is gear/rpm based - is there anyway to change that to be just rpm based?

I will be launching at around 11,000 rpm, at full throttle. I am going to use the clutch swith as the two step when engaged -

let me know if i crazy or what!

 

Thanks in advance

Dan

dan9huis@gmail.com



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dan9huis wrote:

hi all, like many i am very new to all the ecu flashing, I have a unique situation and was looking for a little input -

what i have:

gen 2

stage one turbo

65lb valve springs

i have a full cut auto transmission 1-4 (robinson cut)

i am not running a gear selector, the motor sits in a custom threewheeler frame

What i need - i would like to retard the timing starting at at 8500 rpm by like 3-4 degrees, when i look in the dragtools on the ecu editor - it shows the ignition retard is gear/rpm based - is there anyway to change that to be just rpm based?

I will be launching at around 11,000 rpm, at full throttle. I am going to use the clutch swith as the two step when engaged -

let me know if i crazy or what!

 

Thanks in advance

Dan

dan9huis@gmail.com


 

 Why do you not simply edit the ignition table? It is exactly the

RPM/TPS/angle thing that you whish to tune if I understand well.

If you need specific retard related to clutch or ignore gear position, than on  the ecueditor sources you can play with numbers at your pleasure.

 

 



-- Edited by ballad2 on Monday 25th of April 2011 06:52:33 AM

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thanks! thats what i was curious about, however, i have no clue how to edit the TPS ignition map - and from everything i read, i am nervous to start playing with it, in the circumstance that i may cause damage to the motor - would you be willing to help me with a map?



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i dont need any drivability, i simply need to be full throttle for 300 ft and not blow up :)



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What do you want to do with the timing?

If you don't get the engine tuned, you are asking for trouble.

You will also need some sort of "special" clutch to be abel to do what you want (althoguh i cannot imagine why you woudl want to launch at 11,000, but that is up to you)

If you want to retard the timing, Just highlight the sells that you want to retard, and click the "-" key and watch as the numebr goes lower.

If you are not comfortable doing that, no offense, but you shodld not be tuning a turbo engine and will need to hook up with someone that knows how to do so.

What kind of power level are you expecting from this "stage 1?"

I assume this is a GEN 2 since you posted on teh gen2 board.

 
Is it a "stage 1" with an FMU or are you using a 3 bar MAP sensor and controling the stock fuel injectors?



-- Edited by sportbikeryder on Monday 25th of April 2011 04:35:03 PM

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thanks sportbike ryder -

I wanted to be able to activate the timing retard when i pull the clutch in, and then when i leave the line the timing goes back to normal. kinda like a dyna 4000 can do. i dont pulll the clutch in untill the race is over -  i have a push button full auto transmission 1-4 electric over air.

I dont have a problem flashing the ecu for the turbo, i am just unfamilar with what maps and sensors i am going to need to pay attention to.

the motor is a gen 2 with stock injectors/pistons/rods -  i am not looking to make a lot of horsepower, i am just looking to make it run without damage - (turbo rods/pistons will be in the near future)

i will be running on vp116 race fuel

I DO NOT HAVE A 3 BAR MAP SENSOR -  I HAVE AN AEROMOTIVE 1:1 FUEL REGULATOR -



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oh yeah and i have a powercommander III



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In order to actually tune the engine, you will need to use a 3 bar map sensor instead of the stock one. Otherwise, you will have no way o supply the additional fuel required for the amount of boost you are running.

The 1:1 will just compensate the fuel pressure for the amount of boost you are running to ensure that the injectors continue to flow the proper flow rate. As the boost rises, the ECU will need to be mapped in order to add the proper amount of fuel for say 10 psi at 10,000 rpm vs 15 psi at 10,000 rpm.

Read through the concept for boost fueling post on here to get a full understanding of the boost fueling.

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