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The ecu is oem and unmodified (nothing touched at all). I'm using overkill for the tuning. Just emailed him asking to send me an updated tune with VATS disabled.
I'm a noob in regards to hp tuners. What do you recommend I start with? I see the MPVI2 on their site and another MPVI Pro kit online for $650.
The ECU is staying powered while cranking. I have the autocal plugged into the obd2 port and I can verify it is reading the whole time.
The ecu is oem and unmodified (nothing touched at all). I'm using overkill for the tuning. Just emailed him asking to send me an updated tune with VATS disabled.
I'm a noob in regards to hp tuners. What do you recommend I start with? I see the MPVI2 on their site and another MPVI Pro kit online for $650.
The ECU is staying powered while cranking. I have the autocal plugged into the obd2 port and I can verify it is reading the whole time.
I would sit tight on ordering HPTuners unless you want to get into tuning. I'm willing to bet that VATS is the issue if that is a factory part and since Overkill is most often working with factory cars rather than swaps it is not common practice for him to disable that like V8R does.
I'm not familiar with overkill - let me look things up real quick.
HP Tuner's isn't 100% required - and it's pretty expensive. I've only scratched the surface of E38/E39 tuning, just turning off DTC's and VATS. Might want to probe the sparkplug connector - in GM wiring everything that's pink should be 12v keyed.
Edit: okay - so overkill is using EFI Live (which is the competitor to HP Tuners), and they have that device that basically allows them to sell tunes without giving the whole suite away. That makes more sense now. They should have a vats disable pretty easy.
I'm not familiar with overkill - let me look things up real quick.
HP Tuner's isn't 100% required - and it's pretty expensive. I've only scratched the surface of E38/E39 tuning, just turning off DTC's and VATS. Might want to probe the sparkplug connector - in GM wiring everything that's pink should be 12v keyed.
I will just add that Goof, I and others will be able to help you more with HPTuners since we are already set up to read configs and logs. He is 100% right that it is not exactly cheap or required but with EFILive you will have to rely on Overkill to edit things for you.
I'm going to go ahead and get an hp tuners setup. Do you guys recommend mpvi1 or 2? And any recommendations on where to buy from?
Once I put the overkill tune on using the autocal, can I still access everything with hp tuners after? Worst case, overkill offers an hp tuners tune and I could switch over to that.
I'd be wary of mixing HPTuners and EFI Live - v8r uses EFI and they tossed a tune on one of our ECM's (That I thought I had set back to stock) that ended up bricking it (it might have been damaged in shipping though..). EFI Live is roughly equivalent of HP Tuners though - they're Australian based, HP is American. But they're pretty much equal in feature parity.
Having owned HPTuners for the last 7 years, I cannot fault you for wanting it yourself. It is an extremely helpful diagnostics tool and the HPT forum is quite helpful if you are looking to get your feet wet and dive into learning to tune.
The only reason why you would want the Pro kit is if you need to log additional analog channels (think aftermarket wideband or EGT sensors). If the LFX is like other GM DI vehicles I have tuned, the OEM o2 sensors are wideband and can be read directly through the ECU. You'd have to verify that. Even if they are not OEM widebands, you can buy the AEM OBD2 wideband gauge that adds a PID channel to your OBD2 port and the standard HPtuners interface can then pick up on signal directly through OBD2 instead of an external analog signal that requires pro version.
The MPVI2 with 2 credits on it to unlock your ECU would cost $400 based on what I'm seeing on their website. In the grand scheme of this project cost, that seems like a drop in the bucket given the value of being able to tune and log yourself.
If you want any initial pointers on software, you can feel free to drop me a PM. The most time consuming part of tuning with HPtuners is creating your logging configuration file with calculated functions and histograms that align to the tables found in your tune. Once you get that setup, its as simple as driving around and doing a copy and paste for 95% of the dailing driving related tuning issues you would run across (dialing in fuel trims, idle control, etc). Adding flex fuel with HPT is also a pretty simple process after a bit of reading if you see that in your future.
I'm really craving a roots blower. I know a turbo or side mount supercharger are probably way easier to do, but the thought of a roots blower popping out of the hood makes me very happy. My side space restrictions are pretty rough because it's on an exocet, but I can go vertical as much as I want.
I think the only reason there are not more of them is due to the fact that the fab and cutting required on a camaro/cadillac did not outweigh what could be done with a centrifugal sc that required no cutting.
Hahaha, calling RX on Monday to get the details. They don't make this kit anymore from what I can tell, but all I really need is the intake manifold adapter and crank pulley adapter and I can piece the rest of it together on my own. I'll see if they have any left or they can make me one.
Yup, and the fact I'm going to have to cut a giant hole in my hood anyways makes it perfect. Roots blowers are so badass. How hard was it to tune your engine with the turbo in HP tuners?
On the plus side, since I'm doing an overkill tune and he makes supercharger kits already, I could more than likely get him to tune this remotely for me.
Originally Posted by griff
DO IT!!!!!
I think the only reason there are not more of them is due to the fact that the fab and cutting required on a camaro/cadillac did not outweigh what could be done with a centrifugal sc that required no cutting.
Yup, and the fact I'm going to have to cut a giant hole in my hood anyways makes it perfect. Roots blowers are so badass. How hard was it to tune your engine with the turbo in HP tuners?
On the plus side, since I'm doing an overkill tune and he makes supercharger kits already, I could more than likely get him to tune this remotely for me.
For me...tough
For him....piece of cake I'm sure.
I'd just get the agreement and cost in writing before I bought the sc.
At that price, I think it might be worth it to just get it and see if the intake manifold adapter needs to be modified. I can't imagine it will be far off as the LGZ is literally the Gen 2 of the LFX. I think I'll call Edelbrock on Monday as see if they can give me more info.
Quick tip for anyone with an LFX wanting to use an AIM dash. Wayne at VeryCoolParts wrote an article about using the AIM MXP on his LFX Exocet build with the E39 ecu. https://grassrootsmotorsports.com/ar...eview-aim-mxp/
I couldn't get the AIM dash to read the OBD2 output for the life of me, so I reached out to him. He was nice enough to send over his setup file for the MXP and it turns out the C7 Stingray ECU option in the AIM setup for connecting to GM ECU's works perfectly with the LFX E39. I'm now reading IAT, ECT, RPM, Oil Temp, Oil Pressure and a variety of other data.
Holy hell this thing is loud. Well, got VATS disabled and it started. Immediately ran into my first issue though. Gas pedal is not depressed and it revs up to 1700rpm immediately. HPT scanner is showing 29% throttle position, but zero on the accelerator pedal. Is that normal? Also throwing a bunch of codes, which I expected.
0x7E8: P0010 - Intake (A) Camshaft Position Actuator Circuit / Open (Bank 1) (Permanent)
0x7E8: P0097 - Intake Air Temperature Sensor 2 Circuit Low (Permanent)
0x7E8: P0627 - Fuel Pump A Control Circuit / Open (Pending, Current, Old)
0x7E8: P062F - Internal Control Module EEPROM Error (Permanent)
0x7E8: P0807 - Clutch Position Sensor Circuit Low (Permanent)
08-22-2019, 07:35 AM
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