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09-06-2022, 09:31 PM
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#1 |
 
Drives: 2010 ABM Camaro SS M6 Join Date: Jul 2020
Location: USA
Posts: 90
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Any benefit tuning after gear ratio change?
I'm having parts installed -- is there any benefit to having the dyno tune performed after the gear ratio change or it doesn't matter?
Context: (A) I've ordered parts for a gear ratio change (to 3.91) and limited slip differential upgrade. (B) I've also ordered LT headers and Borla atak exhaust. Different installers for (A) and (B), and it will get dyno tuned with (B). |
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09-06-2022, 11:53 PM
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#2 |
 
Drives: 2005 C6, 2013 ZL1 2020 Ram Cummins Join Date: Jul 2015
Location: Sugar Land, Texas
Posts: 194
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Get it tuned after the exhaust install otherwise you're wasting money
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09-07-2022, 08:47 AM
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#3 | |
 
Drives: Ashen grey, 1SS, L99 Join Date: Aug 2016
Location: Oklahoma
Posts: 527
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Quote:
Your leaving horsepower on the table if you don’t get a tune. Also, your Speedo is going to be way off if you don’t get it calibrated for the gear change. So, it’s in your best interest to get the dyno tune.
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Roto-fab CAI, Nick Williams 102mm TB, LOD X1 V3 intake manifold, GMPP LS3 heads, Night Fury cam, TSP 2” long tubes, Corsa ZL-1 catback, Nitrous Outlet 102mm plate kit/150 shot, NGK BR7EF plugs with Taylor plug wires, DSX flex fuel kit, ZL-1 fuel pump and injectors, B&M deep trans pan, Yank 3400 converter, 3.45s with BMR Delrin bushings, mishimoto 169° Thermostat, GM ground effects, T-Rex upper grill, Z/28 Spoiler, Lolly pop Lime brake calipers, ZL1 10 spoke wheels, 12” subwoofer, and custom paint matched interior.
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09-07-2022, 09:35 AM
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#4 |
           
Drives: 2011 SS-RS Join Date: May 2011
Location: FLORIDA
Posts: 11,485
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Nice re-do Ashen!!!
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TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.
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09-07-2022, 06:26 PM
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#5 | |
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Drives: 2005 C6, 2013 ZL1 2020 Ram Cummins Join Date: Jul 2015
Location: Sugar Land, Texas
Posts: 194
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Quote:
That's correct though. Wait until you have both the exhaust and gears installed so you maximize your gains and don't have to go back for a Dyno session |
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09-08-2022, 08:01 AM
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#6 |
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GPI Sales Consultant
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IF this is an automatic car, the retuning is even more critical, as the transmission will not have the right shift schedule following the gear change, and you could get some very interesting (bad) behavior as the RPM and MPH schedules will not longer agree.
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GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph.
Got a question about a GPI product? Feel free to shoot me a message!  |
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