Duramax Diesels Forum Truck of the Week
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Old 08-12-2017, 12:53 PM
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Default Will 60' improve with 3.42s

Question to those that have gone from 3.73s to 3.42s . Did your 60' improve or did it get worse ?
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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Old 08-12-2017, 02:10 PM
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I'm no expert but I would assume it would get worse, taller gears equals less torque multiplication.
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Old 08-12-2017, 02:33 PM
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I halfway agree with you . Less torque multiplication will be less likely to spin the tires out of the hole which should move propel and move the truck on out of there instead of spinning . Currently my best 60' and 1/8 has been in tune 3 . Tune 4 has netted the best 1/4 mile but it still spun a little with a 60' of 1.503 versus a 1.44 in tune 3 . Tune 5 just spun way too much . I'm hoping that by going to 3.42s it will allow me to launch in tune 5 and increase my MPH and lower my 60' and ET. I was wondering what kind of luck others have had with the gear change
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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Old 08-12-2017, 03:30 PM
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With 1600hp at the ground we haven't seen any change in 60' or 330' running 9.00's and 3.42's. 60 remains the same 1.41-1.45
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Old 08-12-2017, 03:58 PM
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Good to know . Did your MPH and ET improve ?
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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Old 08-12-2017, 04:00 PM
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Quote:
Originally Posted by prostreeter600 View Post
Good to know . Did your MPH and ET improve ?
Cant say. changed turbo setups at the same time. went from 9.25 to 9.04 and 148-153
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Old 08-12-2017, 04:16 PM
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Yea near impossible to tell when you changed turbo setups and gears at all the same time . I'm planning on doing 3.42s everything else is staying the same with exception to a large Derale tranny cooler with fan . I'm guessing your MPH definitely picked up with that much difference in ET .
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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Old 08-12-2017, 04:17 PM
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I guess I missed the 148---153
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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Old 08-12-2017, 04:45 PM
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Whats your end RPM through the traps? Need to see where you make peak power and then compare it to RPM and see where your setup starts to run past its peak. I want to say 3.73 to 3.42 lowered top gear RPM by about 300rpm.
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Old 08-12-2017, 05:19 PM
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I'm at about 4200 crossing the finish line with the 3.73s and 30" tall DRs , keep in mind that was in tune 4 . I haven't had the truck on a dyno so I don't know where peak power is . It comes alive right away and pulls super hard all the way thru . Even when I leave under desired Boost/RPM it comes alive right away . If you look at my videos on my Brag and Drag thread you'll see what I'm talking about .
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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Old 08-12-2017, 07:43 PM
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My fastest pass and intervals is with 3.42's. The more power and torque you have the lower you will want the ratios. I wish I had 3.00's!
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Old 08-12-2017, 08:06 PM
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Mark all my common sense tells me the truck should 60' better , MPH higher and lower the ET just because of the power and torque my setup is making . Hopefully my common sense is spot on . Gears will be in in the next month then it's off to the races
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[B][U][COLOR="Red"][FONT06 GMC Sierra RC Full built motor, carillos, 14/1 Arias W/total seal rings, 9100 AF, SCalTit retainers,SCalsprings,ported heads, SCal pushrods, ARP 625 head studs, O-ringed block, keyed oil pump ,Billet Aluminum Lifters, Harland Sharp Aluminum roller rockers, studded rocker shafts, studded & girdled mains, socal balancer, socal flywheel, PPE Dual Fuelers with twin Fleece 10 mm CP3s , FASS Titanium 260 , 3" bridge, , TrRIPLES----2---S369SXEs .88ARs over a Hybrid GTX 4202R--72mm/87mm 1.0 AR Turbonetics 50mm wastegate ,coilovers at 4 corners, 36" ladder bars, BD cooler, Exergys w/185% MS 8 hole nozzles ,FF Dynamics fans, PPE mans & ups , MA mounts & TC Brace ,NOS, Full Billet Trans, Goerend LL 3200, BT lockup box, 18x9 Raceline Assualts Hooiser Drag Radials 325/45/18s TUNED by MARK@DANVILLE. Engine by Jason Walker San Marcus Tx Best 60'---1.44. Best 1/8---6.39@105.92. Best 1/4---9.978@136.39
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