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Old 02-28-2013, 12:18 PM   #26
2012ZL1
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A 10" fits, so 9.5 would. My 10 is very close, but clears.
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2012 ZL1
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 03-20-2013, 03:37 PM   #27
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My 9.55 clears only because I removed the lines from the black plastic holder and zip tied them to the electric power steering assembly. Now they have plenty of clearance. This is the same on both the 2012 and 2013 I have worked on...my 2012 auto and Smitty's 2013 manual have the same line setup which I was surprised to see.
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#917 A6. 10.52@131.6 1.55 60' (608/620) 2:13 VIR full. ADM race CAI, ATI/Lingenfelter balancer (10" ring), 90mm TB, ID850s,Rotofab/Lingenfelter intercooler reservoir, Cooler Logic HX, Texas Speed 1 7/8" headers(no cats). M/T 305/35-18 drag radials & M&H 28x4.5" bias skinnies. Toyo Proxes R888 285/35-20, Hawk DTC 70/60, 8.66" ring (508/540). Tuning by Frost at Performance Autosport in Richmond, VA (804) 358-2505
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Old 03-20-2013, 04:42 PM   #28
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Originally Posted by 2012ZL1 View Post
A 10" fits, so 9.5 would. My 10 is very close, but clears.
have you had yours on the dyno with the 10" lower and the 2.5 upper? im getting ready to do a similar set up but wasnt sure how the bottom end and the blower bearings would hold up to that
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Old 03-20-2013, 05:36 PM   #29
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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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#917 A6. 10.52@131.6 1.55 60' (608/620) 2:13 VIR full. ADM race CAI, ATI/Lingenfelter balancer (10" ring), 90mm TB, ID850s,Rotofab/Lingenfelter intercooler reservoir, Cooler Logic HX, Texas Speed 1 7/8" headers(no cats). M/T 305/35-18 drag radials & M&H 28x4.5" bias skinnies. Toyo Proxes R888 285/35-20, Hawk DTC 70/60, 8.66" ring (508/540). Tuning by Frost at Performance Autosport in Richmond, VA (804) 358-2505
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Old 03-20-2013, 07:30 PM   #30
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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.
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, 08:51 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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#917 A6. 10.52@131.6 1.55 60' (608/620) 2:13 VIR full. ADM race CAI, ATI/Lingenfelter balancer (10" ring), 90mm TB, ID850s,Rotofab/Lingenfelter intercooler reservoir, Cooler Logic HX, Texas Speed 1 7/8" headers(no cats). M/T 305/35-18 drag radials & M&H 28x4.5" bias skinnies. Toyo Proxes R888 285/35-20, Hawk DTC 70/60, 8.66" ring (508/540). Tuning by Frost at Performance Autosport in Richmond, VA (804) 358-2505
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Old 03-20-2013, 09:22 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, 06:24 PM   #33
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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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2012 ZL1
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, 08:19 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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