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Old 09-23-2012, 08:57 PM   #1
Stephen12ZL1


 
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Drives: '15 Z/28
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Just installed a few goodies on #917

No pics...sorry. I went conservative with the upgrades but they should be worth 60-80rwhp. The mods are as follows:

ATI/Lingenfelter lower pulley with 9.55 ring...left top pulley stock. 50 mm lower idler.
160 thermostat
NGK TR6 spark plugs
ADM Race Air intake
Lingenfelter/Rotofab Intercooler reservoir
90mm Throttle Body
Tune by local dyno tuner this week.

My test drive was uneventful and I was just checking for leaks, pulley wobble, etc. At grandma speeds and light throttle, no CEL yet.
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 10-09-2012, 11:16 AM   #2
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So what was your final numbers after your tune?
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Old 10-09-2012, 11:37 AM   #3
Stephen12ZL1


 
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553hp/563tq....sae corrected. actual on a hot day was 543/553. It is waaay stronger on the street. Feels like it should have from the factory with minimal mods.
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 10-09-2012, 11:42 AM   #4
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Based on the fact that you have an auto Id say those mods were worth about 80rwhp. I see a lot of dyno #'s on here for stock auto's around the 470 range. Nice numbers btw!
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Old 10-09-2012, 12:00 PM   #5
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NICE
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Old 10-09-2012, 12:10 PM   #6
Stephen12ZL1


 
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SAE corrected stock was 478/481...so it was a nice jump. Feels great and the tires scream for mercy now. With the cooler weather, it should be running some decent times at the strip soon!
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 10-20-2012, 08:53 PM   #7
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nice numbers......why did you go with a bigger lower pulley versus a smaller upper? Also, I was told when I do get ready to MOD, if I went to a 90mm TB to use an LS2 90mm TB instead of the LS3 90mm. You ever hear of that?
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Old 10-20-2012, 09:14 PM   #8
Stephen12ZL1


 
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I went with the lower pulley because it was an easier swap and I didn't have to send out for a new snout etc. The 9.55 lower ring is close to the same boost as a 2.55 upper. Also, the ATI balancer is lighter than the stocker. I have never heard of a specific LS2 90mm TB but if they are both 90mm and bolt up just like stock with a "plug and play" wire connection, then they should perform identically. The listings on ebay say LS3 LS2 LS7 so maybe they all use the same part number. 90=90. I purchased the TB from ebay for $130ish. I felt like the more expensive choices (102mm etc) may not help much with a stock unported snout.
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 10-21-2012, 12:13 PM   #9
2012ZL1
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Is the 11.19 on drag radials?
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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 10-21-2012, 12:20 PM   #10
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yes, of course. Traction is difficult without "sticky tires".
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 10-21-2012, 12:32 PM   #11
2012ZL1
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Tell me about it.
My trip to the track (before any mods) resulted in 13's with 2.7 - 2.8 60 fts...lol
I just thought you seemed to have pretty good stock tire times, so it wasn't a huge stretch to the 11's.
My car is a manual though and launch traction is a HUGE problem.
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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 10-21-2012, 12:42 PM   #12
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How about a pic of the new TB
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Old 10-21-2012, 01:24 PM   #13
Stephen12ZL1


 
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exactly like this
http://www.ebay.com/itm/LS3-LS7-L99-...-/190698569801
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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Old 10-21-2012, 01:28 PM   #14
Stephen12ZL1


 
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you must get drag radials or your track runs will be a bust...that I can tell you with certainty.
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'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
Advanced Induction cylinder heads & B-3 cam (RPM) ARH 1 7/8" headers, MSD atomic air force intake. 575rwhp/500rwtq (conservative tune).
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)
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