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10-04-2020, 10:29 AM
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#15 |
           
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,666
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Agree...I shifted mine at 6500 rpm. Helps the 4-5 quite a bit.
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 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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10-04-2020, 01:22 PM
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#16 |
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Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,213
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Its a huge PITA to get these things to shift where it needs to, and its still usually extremely inconsistent from shift to shift. I had to just sit there and adjust WOT shift MPH by 1 and flash, then try it, then flash again, and repeat, it takes forever. If you have bad tires and bad traction its going to hit the limiter easily.
I tried to adjust the RPM limiter acceleration rates to not cut fuel as early as it does stock, so in case it spends and the transmission can't shift as fast it won't hit the limiter. If it does get into the limiter it cuts power back severely and ruins the run. |
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10-07-2020, 06:38 AM
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#17 |
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Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,882
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I moved all mine up 2 mph and 100 rpms starting in the 2-3 shift. Should get plenty of TNT on Saturday to have time to make adjustments if needed.
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10-07-2020, 10:47 AM
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#18 |
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Drives: 2SS 1LE Join Date: Aug 2013
Location: US
Posts: 3,794
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Has anyone made a calculator for the auto gear ratios? rpm x (that gear ratio x rear gear x tire height) to get the exact mph? Am I thinking about that right
We need a wallaceracing with our stuff prepopulated
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10-08-2020, 10:40 AM
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#19 | |
Drives: 2018 Camaro SS 1LE Join Date: Aug 2018
Location: Tampa Florida
Posts: 1,981
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Quote:
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2000 Miata - aventi storm wheels, roll bar.
2019 Mustang GT pp1 - svt pp2 wheels, mbrp cat back, sync 3 upgrade, p1x procharger + stg2 intercooler. 2018 Colorado zr2 - zr2 sport bar, showcase spare tire. 2018 Camaro SS 1LE - GM cai, black bowties, suede knee bolsters, 1le plate frame, black fuel door, dark tails + 3rd brake light, euro side markers + led's, GM all weather floor mats, velossatech big mouth, GM strut brace. 2017 Corvette Grandsport (sold) - untouched. 2006 GTO (sold) - iat relocation, air box mod, monero side marker lights.  |
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10-08-2020, 12:34 PM
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#20 |
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Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,882
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My Camaro used to shift into 5th about 1000 ft I would guess and that last 320 feet goes pretty quick and then trapping at 147 to 149 mph.
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10-08-2020, 01:09 PM
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#21 |
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Drives: 2SS 1LE Join Date: Aug 2013
Location: US
Posts: 3,794
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Man that’s a mph..crazy
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10-09-2020, 07:55 AM
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#22 | |
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Drives: 2017 Camaro 1SS Join Date: Aug 2016
Location: NH
Posts: 1,713
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Quote:
sum of drive tire rolling circumference in feet times engine rpm divided by sum of gear ratio times differential ratio times 88 Example for an SS with runflats, A8 trans in 4th gear: Tire circumference I will use 2016 GM spec for SS runflat 7.078' Engine rpm 6500 Gear ratio 1.69 Differential ratio 2.77 Result is 111.68 mph Now I will mention that the WOT shift mph programming for the automatics is not the actual mph that it reaches. This parameter needs to be lower to a varying extent, or the rev limiter will kick in and close the throttle, making you lose your momentum. This is why cmitchell17 said the auto tranny is a PITA, because it takes some logging and further tuning cycles before it shifts correctly. |
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10-15-2020, 08:50 AM
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#23 |
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Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,882
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Went to track last night and the ported intake/Tb didn't really show any et gains and 1 mph on 2 of the passes. It didn't loose any so that is good. I did make some shift changes and they were fine on the first two passes. However on the 3rd and last pass it hit the rev limiter in 1st and 2nd as it cooled into the mid 70s. I think I need to move the mph by a couple. It ran 11.18/125/1.63 and 11.21/125/1.64 and the last pass it went 11.36/124/1.63 hitting the limiter. It probably would have picked up a little but I had to much fuel in the car as I miss calculated how much I have after I drove 155 miles from home to the track, I had almost 3/4 tank when I made my 1st pass (11.18), last time at the track I had 1/4 when I ran my 11.18/124 so thats almost 50 lbs more then I should have had. My bad for sure plus it was a few degrees hotter this time then last.
Last edited by laynlo15; 10-15-2020 at 09:07 AM. |
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10-15-2020, 08:54 AM
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#24 |
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Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,666
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who ported the IM/TB?
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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10-15-2020, 09:54 AM
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#25 |
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Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,882
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Katech did the TB and Weapon x did the intake according to the previous owner. He went to a ported MSD and 95MM TB on his C7. I think a lot was my fault not having similar fuel level in the car so I screwed up. I have a ported 95mm that faster prom did plus a Solar adapter that I haven't run yet. Not sure if I'll run that this year as I doubt it will help any.
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10-15-2020, 04:47 PM
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#26 | |
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Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
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Quote:
https://www.blocklayer.com/rpm-gear.aspx
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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“ |
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