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Old 03-20-2013, 04:36 PM   #29
Stephen12ZL1


 
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10" lower and 2.55 upper is over 25k blower speed and not recommended. 10" lower with stock upper is close to limit.
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold)
'15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold)
'12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 03-20-2013, 06:30 PM   #30
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Originally Posted by Stephen12ZL1 View Post
10" lower and 2.55 upper is over 25k blower speed and not recommended. 10" lower with stock upper is close to limit.
i have a 9.1 and a 2.5 upper was debating going to a 9.5 lower and 2.5 upper. is the 9.1 lower and 2.5 upper about the most it will take with out over spinning it to much?
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Old 03-20-2013, 07:51 PM   #31
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check out the chart from lingenfelter.com http://www.lingenfelter.com/sites/li....0%20small.pdf

page 7...2.55 upper + 9.55 lower is over 24krpm and not on their recommended list.
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold)
'15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold)
'12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 03-20-2013, 08:22 PM   #32
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informitive link. 9.1 and the 2.5 is even rated above theyre specs good to know.
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Old 03-21-2013, 05:24 PM   #33
2012ZL1
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Not sure what the blower speed specs have to do with anything other than colors on a chart. Mine works great makes lots of boost and almost no heat. Efficiency is only as good as the total output. If efficiency is lower but net output still remains higher it still makes more power as long as heat isn't a problem and or bearings can't take the rpms. So far it all works great on mine.
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2.55 upper, 10" lower pullies, Innovators west billet hub and sfi balancer, solid blower drive isolator, 50 mm idler kit, full length S/S headers no cats, comp cams custom grind cam, comp roller rocker trunion kit, comp push rods,dual valve springs retainers and locks, Injector dynamics ID850 inectors, Rotofab ZL1 cold air kit, Lingenfelter 160 thermostat, Rotofab intercooler reservoir, stock plugs, LS7 90mm throttle body, GTO clutch reservoir mod, my own custom catch can, Tuning by Jannetty, install by me.
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Old 03-21-2013, 07:19 PM   #34
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Originally Posted by 2012ZL1 View Post
Not sure what the blower speed specs have to do with anything other than colors on a chart. Mine works great makes lots of boost and almost no heat. Efficiency is only as good as the total output. If efficiency is lower but net output still remains higher it still makes more power as long as heat isn't a problem and or bearings can't take the rpms. So far it all works great on mine.

i am just worried about excessive blower bearing wear. it would give me an excuse to do a blower swap though if it went out XD.
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Old 05-21-2016, 02:59 PM   #35
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Lingenfelter pulley and belt change chart

I felt this very helpful for those changing pulleys, notice its not recommended to run your SC over 23,000 rpm and depending on what you buy you in some cases could be doing just that!
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