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11-04-2009, 08:35 PM
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'06 Silverado CC Z71 5.3L
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Join Date: Apr 2009
Location: Lafayette, La.
Posts: 38
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It looks like this thread is almost dead but I have another update. The cooler air is doing wonders for my engine. I tried a 78mm throttle body but my truck slowed down in 60 ft, et and mph. I ran best with my stock body that I ported. My et improved .3 and my mph but almost 2 with better tuning and a port job on my factory TB. My 60 ft still is pretty bad but everything else is looking up. I just got in some 1.8 rockers that I will add before I run again. Also waiting on some more cool air. I can tell a noticeable difference when the temp gets in the 50's.
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2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers 
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12-14-2009, 06:18 AM
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'06 Silverado CC Z71 5.3L
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Join Date: Apr 2009
Location: Lafayette, La.
Posts: 38
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I was hesitant to install the 1.8 rockers even after I bought them for fear that my mpg would drop. After they were installed, I was suprised to find that it did not drop and may have actually increased with the new rockers. My 60 still is horrible and I could gain a lot by changing to a higher stall convertor. Gonna debate that idea some more as I drive 50 miles a day back and forth to work. Anyone still out there?
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2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers
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12-14-2009, 08:35 AM
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Speedy
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Join Date: Jan 2009
Location: Augusta, Ks
Posts: 3,111
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What are your updated times?
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 2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s *Waiting to be Installed* 220/222 .581/.581 114lsa, Magnacharger, 60lb injectors
2007 Hyosung GV650 The Little 650 Cruiser that could. 12.7 at 104 Mph
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12-14-2009, 04:23 PM
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Senior Member
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Join Date: Mar 2007
Location: Newark, Delaware
Posts: 375
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I'm assuming your 50 mile commute is mostly highway, correct? Once you're in overdrive and the converter locks, it's the same as a stock stall locked converter. That's why highway mileage is affected very little by high stall converter swaps.
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99 Silverado ECSB 4X4, LQ4, Patriot Stage 2 243's w/ 59cc chambers, TR224-112, Pacesetter LT's, Nelson tune, FLT Lvl 5, Yank 3k stall, UD pulley, CAI, Ported Throttle body, TB Bypass, 160* t-stat, E-fans, 6'' Fabtech lift, 3'' Summit body lift, 37'' ProComp XTerrains, 4.56's, Zexel Torsen T-2, 4'' Rear shackle flip (no blocks) 13.78 @ 98mph on 37's FTW!
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12-14-2009, 08:44 PM
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Senior Member
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Join Date: Sep 2004
Location: Breaux Bridge, LA
Posts: 609
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that's what i been telling him. 
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03 Silverado RCSB 12.41@ 104 n/a
11.74@ 112 75 shot
04 Silverado CCSB Z71
15.67@ 90 n/a
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12-20-2009, 08:41 PM
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'06 Silverado CC Z71 5.3L
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Join Date: Apr 2009
Location: Lafayette, La.
Posts: 38
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Commute is about 50/50 city/highway. My 60 ft is still in the low 2.4's which is my main et downfall. My 4l60e is still stock which will have to be beefed-up if I continue to make more power. Does anyone know anything about the 6 speed trannies used in the newer trucks? Is the OD gear the same or would there be any benefits to going to it?
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2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers
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03-11-2010, 04:54 PM
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'06 Silverado CC Z71 5.3L
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Join Date: Apr 2009
Location: Lafayette, La.
Posts: 38
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6L60e trans
Can anyone give me the gear ratio differences between the 6l60e and 4l60e transmissions? I know it has it's own controller but how much would it drop my rpms at 70mph? Right now with the stock 4l60e, I am at 2250 with 4.10 gears which is hurting my mpg. If the 6l60e has lower first and second gears, that would help my low end problem. Anyone do this swap or know where to find info on it?
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2006 Chevy Silverado Crew Cab Z-71 5.3L, Custom Tune, Volant CAI, 4.10 gears, pacesetter LT's, Y-pipe, high flow cats, comp cam 202/212 500/507 cam, magnaflow muffler, msd coil packs, 1.8 rockers
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03-11-2010, 05:45 PM
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New Member
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Join Date: Nov 2003
Location: Denton Texas
Posts: 17,738
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never heard of or seen an RPO code for a 6L60e transmission. Are you talking about the 6L80e?
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Linear Mode
