Lx450 bullet cars supercharger kit (3 Viewers)

[scottryana]

You can use the Haltech wired in parallels to the stock ECU so that the stock ECU runs the transmission. But it gives you full control of the fueling and timing but if you are in an area with emissions testing it will not pass. This is how I have done it with my grey truck for the last 12 years.

 

[AussieHJCruza]

More $$ than the above, but Haltech and Compushift is another option

 

[haedenlaird99]

Got the xede back from Australia. They said there was a hardware link missing. It’s on and active. As soon as I hit 40-50% throttle it goes straight to 10.5-11. My problem is under 40% I can make 7 psi and it stays at 14.7. I assume I need to adjust the tune but have no idea how to. Guess I’ll start googling.

 

[haedenlaird99]

Here’s all the maps I can adjust

 

[scottryana]

Well looking at those maps you have no boost reference to adjust fueling so really the only way you could do it would be to add injector duty cycle, but you have no way of knowing where you need to do that. If you think it is under 40% throttle you could add some duty cycle at 40% load but load and throttle input are not the same thing so it is going to be just a guessing game. You should look at getting a Haltech and actually having the ability to tune it properly.

 

[haedenlaird99]

Well looking at those maps you have no boost reference to adjust fueling so really the only way you could do it would be to add injector duty cycle, but you have no way of knowing where you need to do that. If you think it is under 40% throttle you could add some duty cycle at 40% load but load and throttle input are not the same thing so it is going to be just a guessing game. You should look at getting a Haltech and actually having the ability to tune it properly.

A haltech is out of my budget right for now. I will say that on the wiring harness for the extra injectors there was a sensor that I had to run a boost reference to.

 

[scottryana]

A haltech is out of my budget right for now. I will say that on the wiring harness for the extra injectors there was a sensor that I had to run a boost reference to.

Well a Haltech is a lot cheaper than a new motor from running at 7psi at 14.7:1.....

 

[AussieHJCruza]

Wonder if the XEDE can't account for the fact that your US truck is closed loop and chasing 14.7:1 from O2 sensor feedback. Our trucks 95 and onwards are open loop, no O2 sensor.

 

[OGBeno]

Well looking at those maps you have no boost reference to adjust fueling so really the only way you could do it would be to add injector duty cycle, but you have no way of knowing where you need to do that. If you think it is under 40% throttle you could add some duty cycle at 40% load but load and throttle input are not the same thing so it is going to be just a guessing game. You should look at getting a Haltech and actually having the ability to tune it properly.

Truth.

 

[White Stripe]

It looks like you have manifold pressure on those graphs. Can you monitor that data while it's running?

 

[haedenlaird99]

It looks like you have manifold pressure on those graphs. Can you monitor that data while it's running?

Yes I can data log too

 

[haedenlaird99]

It looks like you have manifold pressure on those graphs. Can you monitor that data while it's running?

Do you mean maf? I don’t see a manifold pressure box

 

[haedenlaird99]

Well if there’s no way to adjust fuel in closed loop I guess I’ll start saving for a haltech. In the mean time couldnt I just unplug the 02 sensor and force open loop. And then tune from the xede? There’s gotta be a way to make this work at least in the short term

 

[White Stripe]

Do you mean maf? I don’t see a manifold pressure box

Isn't the 0 to 100 part of the graphs manifold pressure in kilopascals?

 

[haedenlaird99]

Isn't the 0 to 100 part of the graphs manifold pressure in kilopascals?

I honestly have no idea. I’m trying to research how to tune and there is like nothing online.

 

[White Stripe]

I honestly have no idea. I’m trying to research how to tune and there is like nothing online.

So let's take the red graph. You have manifold pressure in the vertical from 0 to 100 in kpa. Then you have rpm in horizontal. The cells in the graph are ignition timing numbers. If this is a piggy back ecu, then at 2500 rpm at the 100 kpa mark the piggyback is pulling out 7.7 degrees. However this piggyback isn't scaled for boost it looks like. 100kpa (0psi) is atmospheric pressure which you only see on a naturally aspirated engine at wide open throttle. 20kpa is like 10 inches of vacuum with a naturally aapirated map sensor. If you have a map sensor that can read boost such as a 1 bar sensor, then the 0 to 100kpa is not accurate. You can still tune it, but you have to read live data to figure out the scale of what pressure say 50kpa on the graph actually is. With a 1 bar sensor, 100kpa would be 14psi of boost. The xede company may have a way to change the scale so its accurate and its easier. You should also be able to tune power enrichment vs tps opening. That will allow open loop tuning. Or just take it to a tuner and see what they can do. I've not tuned any boost related stuff for a while, so I'm kind of fuzzy on all this. I'm no expert, just trying to help.

 

[haedenlaird99]

So let's take the red graph. You have manifold pressure in the vertical from 0 to 100 in kpa. Then you have rpm in horizontal. The cells in the graph are ignition timing numbers. If this is a piggy back ecu, then at 2500 rpm at the 100 kpa mark the piggyback is pulling out 7.7 degrees. However this piggyback isn't scaled for boost it looks like. 100kpa (0psi) is atmospheric pressure which you only see on a naturally aspirated engine at wide open throttle. 20kpa is like 10 inches of vacuum with a naturally aapirated map sensor. If you have a map sensor that can read boost such as a 1 bar sensor, then the 0 to 100kpa is not accurate. You can still tune it, but you have to read live data to figure out the scale of what pressure say 50kpa on the graph actually is. With a 1 bar sensor, 100kpa would be 14psi of boost. The xede company may have a way to change the scale so its accurate and its easier. You should also be able to tune power enrichment vs tps opening. That will allow open loop tuning. Or just take it to a tuner and see what they can do. I've not tuned any boost related stuff for a while, so I'm kind of fuzzy on all this. I'm no expert, just trying to help.

I just looked at the diagram I used to install all the wiring. It says the sensor I ran a boost line to is a 2 bar map sensor. So with a map sensor will I be able to tune closed loop?

 

[White Stripe]

I just looked at the diagram I used to install all the wiring. It says the sensor I ran a boost line to is a 2 bar map sensor. So with a map sensor will I be able to tune closed loop?

View attachment 3888704

Pm sent

 

[scottryana]

Isn't the 0 to 100 part of the graphs manifold pressure in kilopascals?

I am pretty certain that is load in % but I could be wrong, if it is kilopascals there is no place on the scale for vacuum

 

[haedenlaird99]

I am pretty certain that is load in % but I could be wrong, if it is kilopascals there is no place on the scale for vacuum

I am reading through the manual. It is in fact load and rpm for x and y. Xede said to edit the tps table to have open loop turn on faster. They also said that 7 psi part throttle at 14.7 afr is normal and what they see in the trucks over there. He said to just run high octane fuel. I won’t be running my truck like that. Can anyone guide me in the best cells to edit in the tps table? I assume just the row under where it starts. The manual kinda sucks