AbbeyMS
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Posts posted by AbbeyMS
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what's the battery voltage doing during the datalogs is it consistence? if the voltage is steady then dead times wont make any difference to the tune numbers
Does the fuel pressure regulator hold Boost ID pressure? is the reg a stock item?
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The map shape would say to me you might have fuel pressure issues as you needing to add fuel numbers to get the correct fuelling. The fuel map should look like the Torque curve of the engine. Torque will drop off at the top end so less fuel is needed. The map other than the issue at the top end looks far better than before.
Do you still have the fuel pump voltage regulator controlling the fuel pump? maybe this isnt supplying 12v to the pump?
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These are the Logging Parameter's used. I think when we get back out next week I will just use a Single control say just RPM. If the other parameters are left @ 0 are they not used in the control of the datalogging?
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On 9/20/2023 at 12:19 PM, Slim47 said:
Hello.
I'm trying to start a 350Z on a VQ35DE but there is no spark. Obviously LINK does not synchronize the trigger.
Obviously the cam signals on the waveform are inverted, but I tried different edges (rising and falling). But I have no success. Since the car is for motorsports, the crank sensor was moved forward onto the crankshaft pulley, but the oscillogram shows that the teeth are positioned correctly.
hi, did you add a trigger disc to the front pulley in the same trigger pattern as the flywheel set up?
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So you can see at 6500rpm and 30% throttle you are 23% to rich, this is far to much for auto tune to work with , the fuel map needs some manual work to get it a little close.
If you have my layout loaded, this screen shot is from wide band versus afr log , you can use this to manually get you fuel map closer.
V
at 60%ish throttle the fuel map is pretty close at 3000ish rpm, at 6000rpm your only around 10% rich
at 90% throttle 2500rpm your 11% rich , 6000rpm around 9% rich
hopefully this will help get and idea of how much work your map needs modifiying
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1 hour ago, Japtastic141 said:
I'm still unclear on how exactly OLLC works within the Link platform. What is it referencing and how is it calculating what it needs to adjust and why did turning it on make my fuel so dramatically rich after around 50% TPS and beyond mid-range RPM?
Overlay lambda is an add onto the fuel equation that helps when tuning Alpha N with a boost car. it needs the fuel map tuned closely to the Lambda figures to allow the fuel equation to work out required fuel quantity once running over base boost (if base boost is 0.8bar the fuel map doesn't know what boost your running OOLC does so it works it out for you. You can run without OLLC turned of but to run more than base boost you require another map configured to add the required fuel that more boost needs something like a 4 or 5d map with MAP versus RPM axis's set up.
if you turn it on after tuning the fuel map the added extra equation will slur(offset) your lambda/AFR measurement.
once the fuel map is tuned nice and tight you can adjust the fuelling by just adjust the OLLC map numbers not touching the main fuel map.
once understood it is the way to go on a traditional fuel equation on a ALPHA N tune or a MAP based tune
2 hours ago, Japtastic141 said:I'm wondering if I wasn't too far off tuning my fuel table but one of the main issues was that my target AFR's were way richer than they needed to be. This massively skewed my 3D map vs yours. I was just erring on the side of caution basically. The two pics below show the comparison between my guestimation targets and yours that I've now swapped to. I was also running a flat figure across all rows from low RPM to high. A stark difference!
Your find that a engine doesn't need a rich (fat) at lower RPM/load numbers. LAMBDA/AFR numbers are a personal choice but most people are around the same area, the numbers in my cal is something we have developed/worked with for years , we also will add fuel per gear/speed/ full load timer once the fuelling is configured for high speed, a car needs a richer mixture when running at high speed. Ignition also need work in relation to speed/load as well
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this is how a base map is set up. Have a read up in the help file.
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2 hours ago, Japtastic141 said:
Brilliant, thanks!
I'm targeting a lot richer after 100 MAP on my AFR table so will tone it down a fair bit now I've seen yours.
One thing I did notice was that at cruising speed / 100MAP, I was seeing around 900c exhaust temps at 14.7 so brought that down to 14.3 which improved temps.
I wasn't clear enough regards EGT numbers while cruising , I think you running too small ignition timing figures, adding timing will lower EGT's far more efficiently than running a rich mixture. Your also running a static injection timing figure that will also affect EGT's/afr readings
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1 hour ago, Japtastic141 said:
Brilliant, thanks!
I'm targeting a lot richer after 100 MAP on my AFR table so will tone it down a fair bit now I've seen yours.
One thing I did notice was that at cruising speed / 100MAP, I was seeing around 900c exhaust temps at 14.7 so brought that down to 14.3 which improved temps.
What sort of ignition timing figures you seeing? any compensation on the timing figure working? IAt?
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13 minutes ago, Japtastic141 said:
Turned on OL and did some more runs, has made things a lot richer. I'll spend some time looking through it all. Any suggestions welcome. Cheers.
https://drive.google.com/file/d/1oY1bRkfRJWxRVo1jkZsReCGiZ8FVrP8F/view?usp=sharing
you now need to tune the fuel table to match the lambda table, you leave the open loop lambda tab turned on.
Looking at your previous map file the fuel map is a long way from being tuned close.
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should look more like this
I dont like the auto tune to rough a map out or to finally tune a car, this needs to be done manually using lambda versus lambda target (which is the same as overlay lambda numbers) pretty easy if you get a good layout set up to view the correct data.
Happy to help if needed
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7 hours ago, Adamw said:
Open loop lambda correction needs to be on for boosted alpha N. You will need to enable that and go over the fuel map again. Once you have the main fuel table giving decent results, then increase the boost to max and confirm the lambda still follows target. If it has restrictive turbines you will find it will drift richer than target at high boost, put negative values in the high boost/high RPM corner of the 4D table that is already setup in the base map if needed to correct this.
Alpha N Fuelling needs to be tuned at base boost , then Open loop lambda sorts of the fuelling when over base boost as Adam said above. If your fuelling is pretty tight to the AFR numbers you shouldn't need to make much of change to the fuel map.
Open loop lambda sorts out the fuelling over base boost without any input from another map mathematical in the back ground
A well set up layout will help with the tuning , on the above run at 55% throttle you map needs a lot of fuel out at low RPM more fuel from 3000rpm upwards
any questions you only need to ask
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Anyone running a Thunder have issue when the ECU doesnt save a log? Been out with a car today running a Thunder G4+ out of 8 sessions on the track it didn't log for 2 sessions 0% data after run. Nothing changed in the CAL file.
Had this on a few Thunder ECU controlled cars.
Any input tech guys @Vaughan @Adamw
thanks
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https://www.platinumracingproducts.com/pages/platinum-racing-products-r35-dwell-settings R35GTR Coil Dwell settings
Stock base fuel pressure on a GTR is 3.0 with no BOOST ID connected
The injector dead time curve should be smooth , where did you get your infomation from?
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VQ doesnt need to have a lot of fuel after cranking/firing I have found. What injector firing angles have you got in the map? main thing it to make sure the throttle is open enough to allow the motor to breath enough to mix with the fuel.
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the factory speedometer sees the signal from the output sensor in the gearbox before the ECU. With a little wiring you could rewire the set up to do what your trying to do. Output sensor = ecu - speedometer
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Stock fans are 2 speed and I doubt any cheaper fan will be as powerful, these pull 20A+ so your be fine and have soft start built in.
If your seeing voltage pull , you need to work on your idle control , within the software you can add idle control base value when the fans start and if you use a Solid state relay with PWM control the start up load will be less.
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Are you using stock Nissan 350Z fans or aftermarket fans? the stock c=fans can be run as 3 speed fans easily via Link ECU.
If you want to control via PDM just use a solid state relay to control the fans.
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canformance is the way to go https://www.canformance.net/
all sort to communicate with the G5 via the can
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G4+
G4X
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wanting to use this as a reference trigger, yes just grind the teeth to look like this, we use this set up and work all good
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the exhaust cam control from Nissan is a pain to control , we see a lot of issues as the car (motors) get older, the friction faces wear out , oil quality makes a huge difference as well. We just find the best position and work on controlling the cam in this position.
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The Haltech dual set up is pretty good , can be brought with either Bosch LSU or NTK sensors , will communicate with Link easily.
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Sounds like the car has had a wire around to enable the ECCS relays from the ignition switch not via the ECU
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First attempt at Fuel Map - Road Tuning R32 GTR RB26
in G4x
Posted
does the fuel pressure drop off towards the high rpm?