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Old 10-26-2012, 02:43 PM   #1
JANNETTYRACING
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JANNETTY RACING ZL-1 NO TUNE PULLEY TESTING RESULTS

We installed ATI LSA Superdamper with interchangeable Crank pulleys 5% and 10%.

I baseline dynoed My 2013 ZL1 Auto Stock 462 RWHP 465 RWTQ 8 PSI

Added the ATI superdamper with 5% overdrive pulley Stock belt and logged 6 runs cool and hot, 495 RWHP 480 RWTQ 9.5 PSI

Removed the 5% and installed the 10% Crank pulley with a longer belt and logged 5 more runs 510 RWHP 510 RWTQ. 10.5 PSI

GM gave us a little room to play.

Here are the results.

I will be testing NO tune Cold air kits when I get back from SEMA.
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Last edited by JANNETTYRACING; 12-10-2014 at 11:34 AM.
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Old 10-26-2012, 02:44 PM   #2
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Interesting. Wouldn't think it had enough learning room fort that with no tune
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Old 10-26-2012, 02:50 PM   #3
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Nice 45rwHP+ from a crank pulley swap. Gotta love boosted cars.
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Old 10-26-2012, 02:57 PM   #4
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that's awesome
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Old 10-26-2012, 03:51 PM   #5
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Old 10-26-2012, 06:41 PM   #6
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Nice!
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Old 10-26-2012, 06:43 PM   #7
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So this is WITHOUT a new tune?
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Old 10-26-2012, 06:52 PM   #8
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Looking forward to the CAI testing also. Will be nice if no tune is needed for pulley and CAI.
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Old 10-26-2012, 07:50 PM   #9
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Have a safe trip - and a speedy return for the CAI tests.
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Old 10-26-2012, 08:07 PM   #10
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What did the AFR and LTFT's look like? Any severe knock retard?
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Old 10-27-2012, 08:10 AM   #11
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Quote:
Originally Posted by ZO6 Bryan View Post
What did the AFR and LTFT's look like? Any severe knock retard?
AFR is the BLACK line on the Dyno sheet boost is GREEN

I did all the testing and Logging with Truck stop 93? octane gas in the car.

There was normal knock activity that we saw with the stock pulley, and the computer learned it out with both pulleys.

Obviously with better fuel the numbers would be better but I wanted Real World DATA.

Driving the car It is so much easier to spin the tires rolling in second or third gear.

Car Pulls Very Hard considering the simplicity of this mod.

Ted.
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Old 10-27-2012, 08:18 AM   #12
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So this is WITHOUT a new tune?
That is What NO TUNE Means
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Old 10-27-2012, 09:08 AM   #13
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Very kewl.
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Old 10-27-2012, 09:47 AM   #14
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Good information. Was this crank pulley only (no upper pulley changes)? I didn't realize the ZL1 runs that rich stock. Even with the 10% OD, it's still has a safe AFR. Can you post a pic of the damper and pulley next to the stock pulley? I would have thought you needed a shorter serpentine belt for OD pulley. Also interested in the no tune CAI.

BTW- I ran an ATI UD damper on my previous car and it was well worth every penny.
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Old 10-27-2012, 10:08 AM   #15
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Good information. Was this crank pulley only (no upper pulley changes)? I didn't realize the ZL1 runs that rich stock. Even with the 10% OD, it's still has a safe AFR. Can you post a pic of the damper and pulley next to the stock pulley? I would have thought you needed a shorter serpentine belt for OD pulley. Also interested in the no tune CAI.

BTW- I ran an ATI UD damper on my previous car and it was well worth every penny.
This would be an Overdrive ATI Damper for the Supercharger drive only the accessory drive is stock diameter.

The Belt needs to be longer for the 10% over the 5% uses the stock belt.
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Waterbury Ct. 06705
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Old 10-27-2012, 10:19 AM   #16
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Quote:
Originally Posted by JANNETTYRACING View Post
This would be an Overdrive ATI Damper for the Supercharger drive only the accessory drive is stock diameter.

The Belt needs to be longer for the 10% over the 5% uses the stock belt.
Like the black belt on this. Absolutelly hate the green belt I've seen on some cars.
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Old 10-27-2012, 10:39 AM   #17
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Old 10-27-2012, 11:48 AM   #18
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I love the green belt!!!! Looks tough!!!!
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Old 10-27-2012, 12:47 PM   #19
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Very interested in a no tune up grade.
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Old 10-27-2012, 01:01 PM   #20
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That is freaking sweet.
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Old 10-27-2012, 01:05 PM   #21
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Color me interested!
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Old 10-27-2012, 01:21 PM   #22
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That's totally awesome. So literally just pulley down for an extra 45 horse power and some torque. The pulley for the supercharger comes off of the accesory pulley?
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Old 10-27-2012, 01:33 PM   #23
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Old 10-27-2012, 01:35 PM   #24
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Could you get the same results by going with a smaller S/C pulley?
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Old 10-27-2012, 01:42 PM   #25
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soo what kind of gains would be had with 91 octane instead of 93? ...stupid california :(
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