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It’s been a perfect storm of issues that have been delaying the MAF project. Not the least of which was the Flu that upended our operations for nearly two weeks. The good news is I expect to be caught up today and am looking forward to more MAF development starting next week.
I was able to get some things done, I 3D printed a special development MAF housing (reverse airflow) that bolts to the back of the AFM for development:
With both sensors in series, the airflow running through them will be identical. And once the MAF sensor is connected to the “AUX” input of the OBD+ module, I will be able to read out both sensors simultaneously using the FocusOBD software. The goal is for the reprocessed MAF signal to graph identical the AFM signal. Naturally, this configuration will not yield any performance advantages because the AMF is restricting airflow. But it will provide a level of confidence before I run the MAF sensor on its own.
This is just a quick and dirty setup, I have a lot of back-and-forth testing to do between the flow-bench and in-vehicle testing. One issue I need to determine is if the airflow entering the MAF sensor is laminar (i.e. smooth and non-turbulent). The short length of MAF sensor inlet where a filter pod is attached may disrupt the airflow causing the MAF sensor to not read accurately. Even the placement of the filter pod where air enters the engine compartment can cause issues while driving. It could even be the AFM will disrupt airflow due to the “barn door” restricting airflow to a concentrated and off-center point. If necessary, I will design build a proper cold-air intake system that addresses these or any other issues that are identified.
fejjj (05-12-2022),J1NX3D (04-21-2022),Millermatic (04-22-2022),mwc951 (04-22-2022),SeaCay (04-21-2022),spencang (04-21-2022) and 1 others liked this post. (Show less...)
Thanks for the update! Are you still planning/hoping to do a system for the turbo that will allow the use of the stock intake and air cleaner? I know it's restrictive... but I _really_ want to keep the stock look!
Thanks for the update! Are you still planning/hoping to do a system for the turbo that will allow the use of the stock intake and air cleaner? I know it's restrictive... but I _really_ want to keep the stock look!
Yes, absolutely! I also want to keep my 944 Turbo close to stock appearance.
I should be able to determine just how restrictive the stock airbox is. Perhaps just switching to a K&N reusable air filter will mitigate the restriction.
I have the same setup with LR kit (Rogue). Big issue is back fires and not able to keep idle... Ends with engine fluded. It comes with 80 injectors, will try with 54s and see.
Didn’t work in turbo mode only in NA on the Rogue DME
Ended up building a new setup so never went back to using the Rogue board again
Originally Posted by riouxc
I have the same setup with LR kit (Rogue). Big issue is back fires and not able to keep idle... Ends with engine fluded. It comes with 80 injectors, will try with 54s and see.
Didn’t work in turbo mode only in NA on the Rogue DME
Ended up building a new setup so never went back to using the Rogue board again
Ho,
I don't have the Rogue board, stock 86 DME and never worked properly. I was on the list of beta version of OBD hopping to find the issue but still, I'm like a dog running at it's tail...
My setup is 86 951 with:
Lindsey Racing M-Tune MAF (used to be Rogue before Joshua handed his kit to Dave Lindsey)
LR Super 61 Turbo
LR Single port wastegate manualy controled
I now have Ostrich 2.0 playing around with Rogue based code... Kinda hard to figure this out... My Porsche specialist told me that the 80# injectors where to much fuel for a 2.5 engine... Now I went back to 54# but did not try it yet.
What dip switch settings are you set to on the Rogue chip board?
Originally Posted by riouxc
Ho,
I don't have the Rogue board, stock 86 DME and never worked properly. I was on the list of beta version of OBD hopping to find the issue but still, I'm like a dog running at it's tail...
My setup is 86 951 with:
Lindsey Racing M-Tune MAF (used to be Rogue before Joshua handed his kit to Dave Lindsey)
LR Super 61 Turbo
LR Single port wastegate manualy controled
I now have Ostrich 2.0 playing around with Rogue based code... Kinda hard to figure this out... My Porsche specialist told me that the 80# injectors where to much fuel for a 2.5 engine... Now I went back to 54# but did not try it yet.
What dip switch settings are you set to on the Rogue chip board?
Not using the pair since they are for race fuel (very high octane)
1,3,5 are all the same setup:
80# injector, pump gas
Rolling back to 11 stock injector may be my next step with 54# injectors.
Just found out my fuel pump is out... Need to jack the car to see what happened during winter, there is a groundhog that set his winter house there... Hope it did not break wires...
What dip switch settings are you set to on the Rogue chip board?
What is your anticipated hp at the flywheel. Do you have an adjustable fuel pressure regulator. I believe the 54# injectors are going to be to larger if hp is around 250, at 250 looking more at 36# to 40#. The fuel flow rate varies as the square root of the p1/p2. When taking the square root of a number less than 1 which is what is happening if trying to lower the fuel pressure, the square root number approaches 1. So lowering the fuel pressure has a very small change in flowrate.
What is your anticipated hp at the flywheel. Do you have an adjustable fuel pressure regulator. I believe the 54# injectors are going to be to larger if hp is around 250, at 250 looking more at 36# to 40#. The fuel flow rate varies as the square root of the p1/p2. When taking the square root of a number less than 1 which is what is happening if trying to lower the fuel pressure, the square root number approaches 1. So lowering the fuel pressure has a very small change in flowrate.
Hi
Guessing your question was for riouxc not me.
For reference my 3.0L ran great with the LR Rogue Mtune and 89 28 pin DME and a tune that Joshua sent me himself with updated tuning he did….different from the original chip with the LR Mtune kit. I found the note about the tune yesterday in my files. I have 80 lb injectors and they worked very well on 94 Octane pump gas.
The car ran far better setup like this than with my Mafterburner and 72 lb injectors.
I will also point out that when running the antiquated Mafterburner it put down over 418 hp and 444 ft/lbs torque to the rear wheels at 15 lbs boost.
I never got chance to Dyno with the Mtune but I know for a fact it was making more power because it was a Fu}#% ton faster.
For reference my 3.0L ran great with the LR Rogue Mtune and 89 28 pin DME and a tune that Joshua sent me himself with updated tuning he did….different from the original chip with the LR Mtune kit. I found the note about the tune yesterday in my files. I have 80 lb injectors and they worked very well on 94 Octane pump gas.
The car ran far better setup like this than with my Mafterburner and 72 lb injectors.
I will also point out that when running the antiquated Mafterburner it put down over 418 hp and 444 ft/lbs torque to the rear wheels at 15 lbs boost.
I never got chance to Dyno with the Mtune but I know for a fact it was making more power because it was a Fu}#% ton faster.
Can you send me your bin file ? I will run the diff. with LR. I have an 86 2.5L... I have a EEPROM burner and Ostrich 2.0 to emulate PROMs. Always 94 Octane 0% Methanol (Shell +/- 2% true).
I never thought of contacting Joshua since he left everything to Dave...
I will need to learn how to do it and load up all the software on my PC
I will try in the next couple days
my tune of course is for a 3.0L not 2.5 as that may affect things?
Originally Posted by riouxc
Can you send me your bin file ? I will run the diff. with LR. I have an 86 2.5L... I have a EEPROM burner and Ostrich 2.0 to emulate PROMs. Always 94 Octane 0% Methanol (Shell +/- 2% true).
I never thought of contacting Joshua since he left everything to Dave...
I will need to learn how to do it and load up all the software on my PC
I will try in the next couple days
my tune of course is for a 3.0L not 2.5 as that may affect things?
You will need to take the code directly from the EEPROM, not Joshua's mini board. I use a R/W EEPROM tool, GQ-4X4. If I remember correctly, you need to change a line in the config file to accept the chip. (4K ,256 bytes or some crap like that, will confirm tomorrow) .
The 3 L is probably good with 80# 3BAR fuel injectors. I will test with 54# 3BAR to see. I also have a 3 inches down pipe that ends at 4 inches. Not sure it creates an issue here...
Tuning is not always plug and play...
My MAF is also a 3 inches diameter as the turbo is a Super 61 from LR. Tight fit under the throttle
04-21-2022, 12:30 PM
