07-15-2022, 06:34 PM | #29 |
Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
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You said it Josh! Mike’s response will probably help many other people understand SOI and how more isn’t always better.
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Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod
Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
07-15-2022, 06:39 PM | #30 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
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Yeah, agreed! But not enough definitely costs some power, as I found out the hard way (as usual)…
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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07-15-2022, 06:52 PM | #31 |
Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
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Ah, we all have the “found out the hard way” stories. It appears you’re getting it dialed in better. Maybe I’ll make it to Fall Brawl and get to catch up with you.
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Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod
Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
07-15-2022, 08:59 PM | #32 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
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Sounds good! Going to Lebanon Valley Dragway tomorrow for Test & Tune in Eastern NY if anyone wants to say hi. Or laugh at my crappy drag racing skills.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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07-16-2022, 10:31 AM | #33 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,797
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I don't necessarily think 370 is too much. I would of liked to see how the car would of responded if you leaned the AFR out when it richened up.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
07-16-2022, 02:52 PM | #34 | |
Drives: 2015 C7 Z06 M7 Join Date: Dec 2012
Location: So-Cal
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Quote:
You can go earlier, I just didn't find more power on the stock LT1 engine. Careful though, go too far and you'll start to go leaner, you just won't be able to tell from a Wideband because the fuel will make it out of the engine on the exhaust stoke - still showing the same A/F ratio as the Wideband is an average measure of all air and fuel passing the sensor - not an actual measurement of what's in the combusion chamber during the power stroke.
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07-16-2022, 04:28 PM | #35 | |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
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Quote:
Also how far is too far from what you have found? I have 361 commanded but it hits 386 and I think that is due to the alcohol adder. I am wondering if I should zero that out. Either way injector MS is staying around 5.5 on E60 and rail holds 2175.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA Last edited by KingLT1; 07-17-2022 at 07:26 PM. |
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07-23-2022, 09:35 AM | #36 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
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So I played around with SOI a little last night.
First log is with the SOI @ 386, second log is at 361. The AFR actually richened up and gained headroom because if you look I am giving it another degree of timing and it's making a little more power. it looks like injector ms might be a touch less as well.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
12-02-2023, 11:26 AM | #37 |
Petro-sexual
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Does anyone have an option or insight as to SOI bring high? In a rough tune, on a stock cam LT4, my logs show SOI getting close to 380* My IPWs are holding at about 4.8ms, and rail pressures were holding at commanded. My SOI calculator shows I'm injecting before TDC, but after EVC. My EOI shows I'm at 193*, so I'm also not injecting into compression.
Is there a reason I couldn't inject some beyond 360*? Because this is on full pump E', should I try taking some SOI out of the alcohol adder? Maybe see if that brings SOI down and see what it does to IPW and rail pressure?
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'20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs |
12-02-2023, 03:02 PM | #38 | |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,749
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Quote:
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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12-02-2023, 07:37 PM | #39 |
Petro-sexual
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Cool. Thanks Josh!
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'20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs |
12-03-2023, 08:58 AM | #40 | |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,797
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Quote:
__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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12-03-2023, 11:57 AM | #41 | |
Petro-sexual
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Quote:
I did notice my adder was adding about 15* of timing, and I was going to pull out a handful, but I think I'm going to try what you suggest, and see what happens. I'm SO CLOSE to wrapping this up the way I was hoping to I can taste it. I'm only a stock cam, and I'm only trying to make sure it's safe and hopefully be reliable.
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'20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs |
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12-14-2023, 08:59 AM | #42 | |
Petro-sexual
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Quote:
I ZERO'd the ALCOHOL adder and commanded 370* in the last-top areas of the SOI BASE table. I also retarded my VVT back to where I usually run it (it was only 1-degree advanced from the last tune file), and SOI came down a little to almost 375* (EOI is almost 210*). Maybe this isn't too bad, because the OEM file commands 356* and the ALCOHOL ADDER commands another 15* for this area, so maybe I'm okay around 375??? And - I'm not looking for gains as much as I am just trying to make sure I'm safe, so if this is safe, then I'm fine. The car still sounds strong, and with that clean, staccato-type pulse (raspy-almost) from the exhaust (rather than a muttled/muted like when it goes too lean), and I'm a bit a ways from EVC, so is this "okay" (not optimal, but safe?)? I didn't really check if it richened up or not because the data capture from the REFLEX programming isn't the best/quick as HPTuners, but I didn't spend a lot of time trying interoperate it either (to be fair). I run my VVT a few/several degrees (RPM-dependent) more advanced than OEM, and am still trying to understand if that's better for this scenario (I can run more timing, too, which is why I left it this way for now), but am just trying to leave no stone uncovered. I've added some more SOI lower in the RPMs and lower in the AIRMASS to see if this will help when I'm pedaling the THROTTLE, raised the RAIL PRESSURES in lower RPMs/AIRMASS-areas (from where I had lowered them for other reasons), and pulled a few percent more E92 MAF in this area, too, and am hopeful the culmination will get this last little patch covered... I'm so close to feeling like I did what I did, I can taste it. A WOT hit, from a roll, is totally fine (so far), but it's just pedaling (because of traction loss) that's the PITA now. Hopefully - with a few more small adjustments this will sort out. It takes so much time to interoperate what others post about SOI and this stuff, because I'm not a tuner (and I get that). Ugh... At least little tidbits are still dropped for the likes of people like me, and I continue to, ALWAYS, appreciate what anyone shares. Thanks for taking the time any of you do to share.
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'20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs |
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