HPtuner file HELP!
09-10-2005, 09:58 PM
#1
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HPtuner file HELP! I just put the ATI kit (P-1SC-1 @ 7psi) on my 99 Z28 M6 LS1. The engine is all stock except for a flowmaster cat back. The kit included a custom tune from Diablosport. Bottom line is the tune is crap (sets P0172/P0175 codes) probably because the injectors "flow vs Kpa" are still set for the stock injectors and the kit came with 38#. Anyway Diablosport can't find their *** with both hands, so I'm wondering if anyone's running something similar to mine and would share the HPtuners *.bin file with me. Thanks for the help! Great forum!
09-11-2005, 10:10 AM
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Right now I'm running running my own flash, which is pretty close to stock. I made the adjustment for the 38# and added some PE enrichment starting at 2000rpm up to 6000. I took a guess at the PE multiplier at 1.568 assuming 7.5# of boost. I'm only getting 5# now so I'm not having trouble with KR, but I'm guessing I should pull some timing when I get the smaller pulley. I was just hoping to not have to "reinvent the wheel".
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09-11-2005, 11:55 AM
#8
you need to adust the timing, and you want to set your PE multiplier to be what you want the AF to actually be, not just a high random number based on boost.
however, if you have not fixed the fuel system to be boost referenced, your injectors get smaller under boost, ( =not good) and will have to lie to something to get the correct fueling.
Ryan
however, if you have not fixed the fuel system to be boost referenced, your injectors get smaller under boost, ( =not good) and will have to lie to something to get the correct fueling.
Ryan
09-11-2005, 02:14 PM
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Sorry about the lack of info.
Here's a run down of specs:
Stock LS1.
Flowmaster cat back.
P-1SC-1 @ 8psi (anticipated with the smaller pulley).
38# injectors (make unknown-they were in the ATI kit).
Additional in-line fuel pump.
M6 w 3.42 rear.
160 deg stat.
coolant BP on throttle
running Autolite 103's @ .035" (only because I couldn't get the TR-6's locally).
93 octane pump gas.
There's no belt dust and I actually overtightened the thing to see if there was a difference, then put it back. I'm pretty sure the belt's not slipping. The boost comes on pretty smooth (builds linearly from about 2700 up to 6000) also if there was slipping, I'd expect the boost to start building then drop off or plateau.
The extra rich PE is the way to lie to the system in anticipation of the boost. I might be wrong here, but since the stock MAP won't go into boost, I think it's the only way to get the extra fuel. Thanks.
Here's a run down of specs:
Stock LS1.
Flowmaster cat back.
P-1SC-1 @ 8psi (anticipated with the smaller pulley).
38# injectors (make unknown-they were in the ATI kit).
Additional in-line fuel pump.
M6 w 3.42 rear.
160 deg stat.
coolant BP on throttle
running Autolite 103's @ .035" (only because I couldn't get the TR-6's locally).
93 octane pump gas.
There's no belt dust and I actually overtightened the thing to see if there was a difference, then put it back. I'm pretty sure the belt's not slipping. The boost comes on pretty smooth (builds linearly from about 2700 up to 6000) also if there was slipping, I'd expect the boost to start building then drop off or plateau.
The extra rich PE is the way to lie to the system in anticipation of the boost. I might be wrong here, but since the stock MAP won't go into boost, I think it's the only way to get the extra fuel. Thanks.
09-11-2005, 02:28 PM
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B.T.W. I came up with the PE multiplier by assuming an engine running 14.7# of boost would need a PEx of 14.7/6.25 or 2.352. The 6.25:1 (lie) should be 12.5:1 in real life with the boost (theroetical double the VE). I interpolated to 7.35# and used a (lie) target of 9.375:1, which gives a PEx of 14.7/9.375 or 1.568.
That was my logic. I'm not really very bright, which is why I'm asking some of you for help. Thanks again!
That was my logic. I'm not really very bright, which is why I'm asking some of you for help. Thanks again!
09-11-2005, 03:22 PM
#11
1. You MUST know what bar your injectors are rated at to properly set up the IFR table. If this table is not right, you will never have your tune right.
2. That is not how the PE Mult works. 14.7/Mult = Commanded A/F ratio. You are comanding a 9.375:1 A/F ratio. Way too rich. What you command is not always what results. You need a wide band to be sure. 11.5 ~ 11.8:1 is a good boosted A/F to shoot for and adjust up or down depending on how much timing you are running and if you are getting any KR. Quality of fuel will determine how lean you can go with boost also.
3. Adjust WOT timing for 16~20 degrees first depending on if you are getting any KR. Again quality of fuel, compression ratio, and amount of boost will determing how much timing you can run.
4. You should really be doing this on a dyno while logging.
I looked at your bin and see a lot of problems. I can help you out but you need to find out about the injectors first. Call ATI or whoever you bought the kit from and find out the bar rating on the injectors.
I would NOT drive the car with the file you sent me. You are commanding 28* of WOT timing. That is way too much will probably do damage with detonation.
2. That is not how the PE Mult works. 14.7/Mult = Commanded A/F ratio. You are comanding a 9.375:1 A/F ratio. Way too rich. What you command is not always what results. You need a wide band to be sure. 11.5 ~ 11.8:1 is a good boosted A/F to shoot for and adjust up or down depending on how much timing you are running and if you are getting any KR. Quality of fuel will determine how lean you can go with boost also.
3. Adjust WOT timing for 16~20 degrees first depending on if you are getting any KR. Again quality of fuel, compression ratio, and amount of boost will determing how much timing you can run.
4. You should really be doing this on a dyno while logging.
I looked at your bin and see a lot of problems. I can help you out but you need to find out about the injectors first. Call ATI or whoever you bought the kit from and find out the bar rating on the injectors.
I would NOT drive the car with the file you sent me. You are commanding 28* of WOT timing. That is way too much will probably do damage with detonation.
Last edited by 2xLS1; 09-11-2005 at 03:28 PM.
09-11-2005, 03:48 PM
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What's probably saving me is the fact that currently I'm only building about 5#. I was just hoping someone else had run a setup similar to mine (remember reinventing the wheel).
You're right about the PE, but when the system is in PE, it's running open loop off the primary VE table (which I'll run off of after 105 Kpa). The commanded 9.375 would only apply at a true 105 Kpa (remember I'll still read 105 even though it'll really be closer to 150). Bottom line is that without a 2bar system it'll always be a compromise.
Seems to me in this age of computers, these setups should be quite repeatable. The OEMs do it by the thousands all over the world.
Anyway, I will get some more info on the "flow vs. Kpa". Do you have a file I could look at in the mean time?
You're right about the PE, but when the system is in PE, it's running open loop off the primary VE table (which I'll run off of after 105 Kpa). The commanded 9.375 would only apply at a true 105 Kpa (remember I'll still read 105 even though it'll really be closer to 150). Bottom line is that without a 2bar system it'll always be a compromise.
Seems to me in this age of computers, these setups should be quite repeatable. The OEMs do it by the thousands all over the world.
Anyway, I will get some more info on the "flow vs. Kpa". Do you have a file I could look at in the mean time?
09-11-2005, 05:03 PM
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OK, I got it. You're the man! I'll give it a shot as soon as the Packers are done getting abused.
WOW, you really did pull some timing. It's hard to believe. You'd think I'd have an audible knock.
WOW, you really did pull some timing. It's hard to believe. You'd think I'd have an audible knock.
09-11-2005, 06:03 PM
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Yes, of course I'm doing some logging. There isn't any KR going on. The low rpm/low load cells are a little rich (LTFTs -6 to -10). And the 2800-4500 moderate-high load are a little lean (LTFTs +8 to +12). Of course there's no data at high rpm or any wideband data. At this point I just didn't think it'd be worthwhile to start tweaking/SD tuning because this flash isn't what I'd consider a good starting point.
B.T.W. The MAF is what I was forgetting about. You're right on the money. Good thing I was so rich. I've been looking at the plugs and they really haven't got much color or other activity going on.
B.T.W. The MAF is what I was forgetting about. You're right on the money. Good thing I was so rich. I've been looking at the plugs and they really haven't got much color or other activity going on.