10-25-2018, 03:26 PM | #883 | |
FASTER!
Drives: Challenger Hellcat, 2SS Camaro Join Date: Apr 2008
Location: Middle Tennessee
Posts: 2,245
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So I see a 10.94 in your sig (good video too), was that stock? So you did it? |
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10-25-2018, 05:41 PM | #884 | |
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#1 Off the street 6 PM 122 mph - DA 400 (6 PM) #2 10 min later 121.5 mph - DA 400 (I spun on this run) #3 45 min later 120.0 - DA 295 #4 2 hr 45 min later 120.5 - DA 121 Other than the Rotofab all stock. These MPHs are about the same before and after the RF. Some of my runs are in the high teens. Normally I leave the hood open, but my runs look about like this. That night I decided to leave it closed. Track mode all nannies off. I guess I just have a slow ZL1.
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"Democracy Dies in Darkness" |
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10-25-2018, 07:24 PM | #885 | |
Life's Short, Live Fast!
Drives: 2017 Hyper Blue A10 ZL1 Join Date: Nov 2016
Location: London, KY
Posts: 2,015
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Thanks! That is bone stock down to the tire and I ran that last December. Felt like I may have left a little on the table. I had ran 129.5 mph earlier that night, but the track wasn't there yet. Then when I ran the 10, I knew it could be launched harder if the track was a little better. Even though a 1.71 60' is good, I very well could've been out past the 60 mark before I was wide open, where on a good sticky track, I can get it to the floor pretty fast. On top of that, the car feels like and shows evidence that it is getting faster as it racks up usage.
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Life's Short, Live Fast! https://youtu.be/rTUv2p4T7OA 10.94 at 128 mph, 11.13 at 127mph 870 DA, https://youtu.be/e_X_LcpFp50 11.19 at 127mph 1100 DA, https://youtu.be/OXQiCQdQuH4 11.40 at 125mph 1800 DA
https://youtu.be/uWba1qs8M6Q 11.52 at 123mph 3500 DA TZQPHG '17 ZL1 HBM|A10|Nav|PDR|CFW Hood|ZL1 Mats 12/26/2016 Ordered! 2/8/2017 Built!! 3/2/2017 Brought Home!!! |
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10-26-2018, 07:10 AM | #886 | |
Life's Short, Live Fast!
Drives: 2017 Hyper Blue A10 ZL1 Join Date: Nov 2016
Location: London, KY
Posts: 2,015
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One of our fellow ZL1 owners has shown a .1 and 3 mph gain by removing his Rotofab. I'm sure there's a gain to be had with the right tune with it, but on the stock tune, it seems the Rotofab hurts the performance. Something to try on top of keeping the supercharger cool.
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Life's Short, Live Fast! https://youtu.be/rTUv2p4T7OA 10.94 at 128 mph, 11.13 at 127mph 870 DA, https://youtu.be/e_X_LcpFp50 11.19 at 127mph 1100 DA, https://youtu.be/OXQiCQdQuH4 11.40 at 125mph 1800 DA
https://youtu.be/uWba1qs8M6Q 11.52 at 123mph 3500 DA TZQPHG '17 ZL1 HBM|A10|Nav|PDR|CFW Hood|ZL1 Mats 12/26/2016 Ordered! 2/8/2017 Built!! 3/2/2017 Brought Home!!! |
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10-26-2018, 09:04 AM | #887 | |
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But this low mph thing has been going on for a while before the RF. I suppose I should start logging my runs. Do you know if the PDR with the Cosworth or PI Toolbox would be helpful? Otherwise I guess I will buy another HP Tuners.....
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"Democracy Dies in Darkness" Last edited by Fraxum; 10-26-2018 at 09:24 AM. |
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10-26-2018, 11:01 AM | #888 |
Life's Short, Live Fast!
Drives: 2017 Hyper Blue A10 ZL1 Join Date: Nov 2016
Location: London, KY
Posts: 2,015
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There's really not a lot of helpful info for drag racing in Cosworth. It does show minimum and maximum: tire temps and pressures, coolant temps, oil temps, trans temps, etc. I wouldn't say it's useless, but you'd be better off with hptuner or something for logging. That way you can see info that makes a bigger difference in performance like IATs, boost levels, ignition timing, spark retard, fuel, etc. That way you have a better picture of what's going on in different conditions and circumstances. I think it would be even more handy once you start swapping out parts. I've thought about buying hptuner just for logging purposes, and then when I'm ready to give up my warranty and start modding, I could see exactly how the car reacts to changes and I could try some simple tuning stuff on my own. I'd like to be able to dial back or even remove the torque management to see how much of a difference that would make at the strip.
One drag related thing that is kind of neat in Cosworth, is one page shows an aerial view of the track/strip that plots a line as you make the pass, and off to the side is a graph that shows your throttle input at any given time in the run. You can see pretty quick what a difference in grip does to how you operate the throttle. Just thinking about this makes me want to load up my PDR footage from last week and see how crazy my throttle graph looks from all the spinning and peddling I was doing.
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Life's Short, Live Fast! https://youtu.be/rTUv2p4T7OA 10.94 at 128 mph, 11.13 at 127mph 870 DA, https://youtu.be/e_X_LcpFp50 11.19 at 127mph 1100 DA, https://youtu.be/OXQiCQdQuH4 11.40 at 125mph 1800 DA
https://youtu.be/uWba1qs8M6Q 11.52 at 123mph 3500 DA TZQPHG '17 ZL1 HBM|A10|Nav|PDR|CFW Hood|ZL1 Mats 12/26/2016 Ordered! 2/8/2017 Built!! 3/2/2017 Brought Home!!! |
10-26-2018, 04:25 PM | #889 | |
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and Race Star 17x10.5 5x120 32 Offset 92 Drag Star Bracket Racer Metallic Gray Wheel RAS-92-705253G A pair $468.58 shipped. I was going to go with black, but the grey was cheaper and sort of match the stockers. Later I want to go with black MRR ZR1 19" wheels and Toyos R888Rs in the back. Once you start modding these cars you need more grip than the stockers. One guy I met at Atco with a new ZL1 already totaled his ZL1 on the street after getting loose and meeting a guardrail. He was fine thankfully. With 800 miles on the clock his ZL1 was running faster at atco than my ZL1 with 6K miles. And I shared my launching techniques with him. Funny. He should tell me what he was doing. Then you need this package + https://www.summitracing.com/parts/RCE-601-1428-10 Hint: When installing the RaceStar lugs lightly oil the outside of the lug barrels. 140 torque. No worries about moving the drivers side rear wheelwell connector. I think Chevy moved it for us. I like to keep the air pressure monitor with DRs: https://www.gmpartsdirect.com/oem-pa...r-nut-13581557 https://www.gmpartsdirect.com/oem-pa...ensor-13598787
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"Democracy Dies in Darkness" Last edited by Fraxum; 10-26-2018 at 04:43 PM. |
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10-26-2018, 11:02 PM | #890 |
Drives: 2017 ZL1 Join Date: Aug 2009
Location: Maryland
Posts: 1,052
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David has run 10s stock. I'm surprised others haven't done it also. When you consider that the Z06s have run 10.4s stock, the ZL1 shouldn't be far behind. Sure, there's a weight disadvantage, but I"m sure the 10 speed makes up some of that difference.
I've run 10.99 also at full weight.
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'17 ZL1 10.99@129 stock. 4225# raceweight. Best 60'- 1.66 on factory tires. 10.48@132 E50, intake and tune. 4270 lbs
https://youtu.be/EyHtdH9XOkY https://youtu.be/Lcu41obbTf8 '13 ZL1 BRM A6. 11.591 @ 119.2 factory stock with a 1.68 60'! Best stock mph 121.8. 11.29 @ 123 RotoFab, drag radials and skinnies. 4360# raceweight. http://youtu.be/yggIA3C_kkA 2014... back to stock http://youtu.be/spQLaTWbThs 2013... stock & RotoFab Last edited by big dave; 10-27-2018 at 01:16 PM. |
10-26-2018, 11:37 PM | #891 | |
Drives: ZL1/335i Join Date: Apr 2014
Location: Santa Barbara
Posts: 870
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10-27-2018, 09:02 AM | #892 |
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Hmm maybe the Rs are better. And I was only at about 26 pounds.
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10-27-2018, 09:10 AM | #893 | |
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So either I suck at this, or my ZL1 is a slow one, or a little of both.
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"Democracy Dies in Darkness" |
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10-27-2018, 11:07 AM | #894 | |
Drives: ZL1/335i Join Date: Apr 2014
Location: Santa Barbara
Posts: 870
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I’m not sure. My friend runs the ET Street SS as his regular street tires on his ~580 whp Chevelle, and said they don’t hook all that well. And since I swap my tires at the track, I figured the R would be a better choice. It only felt a little floaty on one pass where I aired them down a few pounds. I kept them at 24 psi the rest of the time, and they were great.
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Thankfully, the track prep was good and it cooled off late in the night. DA never got below about 1300 though. Still, somehow my first pass in the car was an 11.1 @ 129.x. That was after a bunch of idling in line to get in and get through tech. As the night cooled and I got a little more experience launching the car, I shaved that down to a 10.79 @132.7. Now, my car isn’t stock. But what I’d done at the time isn’t known to make much power on the dyno. Headers are good for 15 whp or so from what I’ve seen. The Roto-Fab, who knows. I didn’t think the Mamo ported TB would do much either. Maybe the secret is in my amateur tuning, lol. I didn’t do much other than correct the MAF curve and get WOT fueling where I wanted it. Maybe your car is down on power? I doubt it’s your driving, as I’m far from an experienced drag racer. I’ve been going to Famoso every now and then since my senior year of high school in 2000, but this was my first outing in 8 years. Anyway, best of luck on getting it figured out. |
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10-27-2018, 11:17 AM | #895 |
FASTER!
Drives: Challenger Hellcat, 2SS Camaro Join Date: Apr 2008
Location: Middle Tennessee
Posts: 2,245
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If you really wanna get serious, a lot of it is car setup. By this I mean:
The right fuel The right amount of fuel in the tank The right tire/wheel setup The right tire pressure (not too low and not too high) Junk weight removed from the car (I've seen people go down the track with a cooler in the trunk!) Warm fluids and a cool supercharger I've seen as much as a 3-4 tenths gain with nothing more than the right setup. I've got a couple more things to test on the Hellcat just to see what it'll do with tires/wheels/driveshaft (hoping for a 10.4x), then it's time to bump the power and shoot for 10.0. |
10-27-2018, 01:20 PM | #896 | |
Drives: 2017 ZL1 Join Date: Aug 2009
Location: Maryland
Posts: 1,052
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From what I'm seeing though, not too many ZL1 owners race their cars at the dragstrip. "Mexico" seems to be the more popular place to race these days.
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'17 ZL1 10.99@129 stock. 4225# raceweight. Best 60'- 1.66 on factory tires. 10.48@132 E50, intake and tune. 4270 lbs
https://youtu.be/EyHtdH9XOkY https://youtu.be/Lcu41obbTf8 '13 ZL1 BRM A6. 11.591 @ 119.2 factory stock with a 1.68 60'! Best stock mph 121.8. 11.29 @ 123 RotoFab, drag radials and skinnies. 4360# raceweight. http://youtu.be/yggIA3C_kkA 2014... back to stock http://youtu.be/spQLaTWbThs 2013... stock & RotoFab |
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