02-09-2023, 02:04 PM | #1 |
Drives: firebird Join Date: Jan 2010
Location: valdosta, georgia
Posts: 155
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Throttle body need tuning
I have a Katech 87mm throttle body sitting in the garage. If I throw that on my LT4 will it require tunining?
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02-09-2023, 02:24 PM | #2 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,562
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I would call and ask them, but I wouldn't think it would.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
02-09-2023, 02:53 PM | #3 |
fo'shizZL1
Drives: 2017 ZL1 Join Date: Aug 2017
Location: ATL
Posts: 1,281
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you should be good. might need to do the throttle body relearn
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides- 2014 ZL1 M6 Red Hot | Tons of mods 2004 CTS-V M6 Silver | Many mods 1995 Corvette M6 Torch Red | A few more mods 1992 Camaro M5 White | A few mods |
02-09-2023, 03:25 PM | #4 |
Drives: 2023 ZL1 - Modified All Bolt On's Join Date: Dec 2022
Location: Columbus, Ohio
Posts: 558
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I put a 100mm on my new 2023 ZL1 and didn't require a tune. But, yes it require that I unhook the battery for a minute, reconnect and drive a bit to do a throttle "re-learn"
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02-10-2023, 07:44 AM | #5 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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what does the timing show at idle with the throttle body?
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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 |
02-10-2023, 07:51 AM | #6 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,758
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That’s the question of the hour. I tried a “ported” TB by a vendor that was supposed to be better than a 103mm…absolute nightmare. Tons of negative timing at idle and the car acted possessed. I took it off and put the Katech 103 back on, problems are gone. I then upgraded to the Katech 112, also no problems.
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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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02-10-2023, 08:41 AM | #7 |
Oh Oh it's Friday Night!
Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018
Location: Walton Woods
Posts: 1,061
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^^^Agreed.^^^ Unhook the battery, install, hook it back up and go for a long drive. You should be good to go.
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2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm
Four that wanna own me Two that wanna stone me One says she's a friend of mine... |
02-10-2023, 08:52 AM | #8 |
Drives: 2015 Camaro ZL1 Join Date: Oct 2020
Location: Clinton Twp, Michigan
Posts: 249
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The CNC ported 87mm throttle body does not require a tune.
The CNC ported 95mm or billet 103mm throttle bodies both require tuning. |
02-10-2023, 06:27 PM | #9 |
Drives: 2018 Camaro SS 1LE Join Date: Aug 2018
Location: Tampa Florida
Posts: 1,980
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I'm seeing negative timing at idle. I have a Nick William's 103, on a tuned car the TB relearn would not be a necessary thing to do correct? I suspect mine is coming from a probable MSD leak and I know the MM Wild is causing some vacuum leak because when I cap it off idle timing is much better. Just trying to make sure the TB relearn is not necessary on a tuned car.
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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. |
02-10-2023, 07:44 PM | #10 |
fo'shizZL1
Drives: 2017 ZL1 Join Date: Aug 2017
Location: ATL
Posts: 1,281
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Tuning should have fixed the negative timing by adjusting the torque and airflow modeling.
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides- 2014 ZL1 M6 Red Hot | Tons of mods 2004 CTS-V M6 Silver | Many mods 1995 Corvette M6 Torch Red | A few more mods 1992 Camaro M5 White | A few mods |
02-13-2023, 01:41 PM | #11 |
Drives: 2023 ZL1 - Modified All Bolt On's Join Date: Dec 2022
Location: Columbus, Ohio
Posts: 558
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I will have to get back with you on that one!! I just installed my long tube headers and getting ready to do the rest of the exhaust and the Corsa Axle back with NPP. Then on to the sweet looking Katech valve covers with coil relocation kit, new Granatelli new coils and 0ohm plugs wires, then reassemble the rest that I took off to do all this work! So at the moment, she isn't firing up! But once she ready, I'll check the timing before any tune is done.
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02-13-2023, 02:36 PM | #12 | ||
Drives: 2017 ZL1 Join Date: Jan 2017
Location: NJ
Posts: 905
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Quote:
Anyone attempting TB should observe their Zero Pedal Engine Torque and compare it to Predicted and Immediate Tq and update their Torque Model values to get their timing back in the positive values, somewhere like 0 to +10 degrees (ish). Also want to tweak the throttle body area values and if you are feeling skilled go into driver demand tables to adjust curves for improved driveability. Here is a video that touches on this topic, it is associated with changing the CAM but at the end of the day both TB and CAM are changing the airmass into the cylinder:
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2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)
Last edited by LiqTenExp; 02-13-2023 at 06:32 PM. |
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