Just did a speed density tune
03-25-2016, 02:46 PM
#41
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St. Jude Donor '15
I agree the camshaft is the source of the surging and poor idle quality (reverse pulses through the MAF totally confusing it - you can see it on the log play back via wide frequency range all at idle).
I want to try MAP for idle up to about 1500 rpms then switch over to the MAF/MAP combo that is currently used. Does anyone know the specifics how to do this in HP tuners? I have a wideband so I can tun the MAP table once the MAF is disabled, but I would like to keep both sensors active in case one fails.
I want to try MAP for idle up to about 1500 rpms then switch over to the MAF/MAP combo that is currently used. Does anyone know the specifics how to do this in HP tuners? I have a wideband so I can tun the MAP table once the MAF is disabled, but I would like to keep both sensors active in case one fails.
I still think you're better off just going SD and being done with it.
I always wondered if you could use the dynamic airflow prediction coefficients to make it only really use the MAP at lower RPM's, then set dynamic airflow disable to 1500 RPM's or whatever so it would switch over to MAF only then, but I've never messed with the coefficients enough to know if it's possible. I've always read that HPT doesn't offer access to all of the coefficients there really are.
I'd just carry an extra MAP sensor in your glovebox if it's a major concern.
Last edited by schpenxel; 03-25-2016 at 02:46 PM.
03-25-2016, 06:30 PM
#42
Burning Brakes
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St. Jude Donor '13
You can go from mixed mode to MAF only by changing the dynamic airflow disable RPM setting, but that won't really help with what you want to do.
I still think you're better off just going SD and being done with it.
I always wondered if you could use the dynamic airflow prediction coefficients to make it only really use the MAP at lower RPM's, then set dynamic airflow disable to 1500 RPM's or whatever so it would switch over to MAF only then, but I've never messed with the coefficients enough to know if it's possible. I've always read that HPT doesn't offer access to all of the coefficients there really are.
I'd just carry an extra MAP sensor in your glovebox if it's a major concern.
I still think you're better off just going SD and being done with it.
I always wondered if you could use the dynamic airflow prediction coefficients to make it only really use the MAP at lower RPM's, then set dynamic airflow disable to 1500 RPM's or whatever so it would switch over to MAF only then, but I've never messed with the coefficients enough to know if it's possible. I've always read that HPT doesn't offer access to all of the coefficients there really are.
I'd just carry an extra MAP sensor in your glovebox if it's a major concern.
The HPTuners seems more procedure driven so I'm having difficulty finding a good step by step to initiate MAP sensor tuning. I know others have done it many, many times so I don't want to reinvent the wheel. I did a search in HPTuners forums and have some reading to do now unless someone can point out a good link to get me started. <===== hoping for that result.
03-25-2016, 06:32 PM
#43
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St. Jude Donor '15
Set maf high freq fail to 1 hz and it will be running in SD mode. It's under engine diag, airflow I believe.
03-28-2016, 09:31 AM
#45
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St. Jude Donor '13
Update:
What I could not find was my wideband - packed in a box in one of two 10x30 storage units. MAP tuning on hold. Looking through the settings it looks like the car is using MAF only right now.
What I could not find was my wideband - packed in a box in one of two 10x30 storage units. MAP tuning on hold. Looking through the settings it looks like the car is using MAF only right now.
06-01-2016, 12:38 PM
#46
Burning Brakes
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St. Jude Donor '13
Update, Update:
Sorry to stray from the thread topic a bit but I gave up on finding the wide band for now but built a sealed air box, opened the front end a bit and did some fine tuning. I still have the surging at low loads but I'm impressed with the sealed air box upper RPM and highway cruising improvements so I thought I'd share the results.
Mick-A-Fied Sealed Air Box Results (maxed out the torque reading HPTuners will display at 640):
After Tampa Tuning in as purchased trim (nice improvement over as purchased torque values on HPTuners):
Torque values from HPTuners in as purchased form:
Sealed air box:
I formed a Kydex Lid:
All of the seams are sealed. There are three air inlets (I know this isn't the best case but I have a reason...for now), The factory front is opened up and a Kydex air diverter was formed over the center of the air filter not allowing air directly into the filter (MAF Sensor). There are two openings on each bottom side of the box feeding from the big lower opening to allow more indirect air into the box. Since I was worried about injector size I decided to have three openings so the lowest pressure would be used as a bleed off and not over-pressurize more than I had injector. That probably causes a little turbulence in the box but I can't complain with the results.
Mick-A-Fied Air Box Rev2 is in progress. The sides ballooned out pretty far so I am reinforcing there and I had to add more screws to the lid as well. I'd like to hit 128 g/cyl and match my buddy's 441cu LS7.
Now, I need to find that wide band and get back on subject!!!
Sorry to stray from the thread topic a bit but I gave up on finding the wide band for now but built a sealed air box, opened the front end a bit and did some fine tuning. I still have the surging at low loads but I'm impressed with the sealed air box upper RPM and highway cruising improvements so I thought I'd share the results.
Mick-A-Fied Sealed Air Box Results (maxed out the torque reading HPTuners will display at 640):
After Tampa Tuning in as purchased trim (nice improvement over as purchased torque values on HPTuners):
Torque values from HPTuners in as purchased form:
Sealed air box:
I formed a Kydex Lid:
All of the seams are sealed. There are three air inlets (I know this isn't the best case but I have a reason...for now), The factory front is opened up and a Kydex air diverter was formed over the center of the air filter not allowing air directly into the filter (MAF Sensor). There are two openings on each bottom side of the box feeding from the big lower opening to allow more indirect air into the box. Since I was worried about injector size I decided to have three openings so the lowest pressure would be used as a bleed off and not over-pressurize more than I had injector. That probably causes a little turbulence in the box but I can't complain with the results.
Mick-A-Fied Air Box Rev2 is in progress. The sides ballooned out pretty far so I am reinforcing there and I had to add more screws to the lid as well. I'd like to hit 128 g/cyl and match my buddy's 441cu LS7.
Now, I need to find that wide band and get back on subject!!!
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KP-C6Z (06-18-2016)
06-18-2016, 06:37 PM
#49
06-18-2016, 09:56 PM
#50
Burning Brakes
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St. Jude Donor '13
I'm going to be traveling for another week so please shoot me a reminder if I haven't sent it to you by Monday June 27th. Take my timing strategies with a grain of salt as I experiment between a tough sounding idle, minimizing surging, freeway cruising fuel economy, drivability, keeping revs from hanging, minimizing popping out of the exhaust and keeping the power good. Some areas are not blended at all on purpose.
07-02-2016, 03:16 PM
#53
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St. Jude Donor '15
If the tuner does it right it's fine.
The car sounds miserable to drive the way it is.. so not like you have a lot to lose. At least switch it to SD real quick and see if that gets rid of the problem IMO
The car sounds miserable to drive the way it is.. so not like you have a lot to lose. At least switch it to SD real quick and see if that gets rid of the problem IMO
Last edited by schpenxel; 07-02-2016 at 03:16 PM.
07-02-2016, 07:11 PM
#55
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St. Jude Donor '15
I know you're pretty frustrated with it--I wish you were local and I'd try to take care of it for you
Just let me know if the tuner needs a second set of eyes to take a look over anything. I can talk to him or email with him or whatever he wants if it will help.
Just let me know if the tuner needs a second set of eyes to take a look over anything. I can talk to him or email with him or whatever he wants if it will help.
07-02-2016, 08:14 PM
#56
Le Mans Master
Originally Posted by timmyZ06
Yes it is and this is my last attemp to get this **** to work right!!! So sick of the BS