06-28-2018, 12:58 PM | #113 |
Life's Short, Live Fast!
Drives: 2017 Hyper Blue A10 ZL1 Join Date: Nov 2016
Location: London, KY
Posts: 2,015
|
That looks about like mine
__________________
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!!! |
06-28-2018, 02:43 PM | #114 |
Drives: Fast Join Date: Mar 2015
Location: Michigan
Posts: 3,696
|
That looks like mine did too. I still unscrewed mine and made sure the bypass was slammed shut. Between that, the RotoFab and X pipe/exhaust I think the car feels a little bit stronger in the mid range. And it certainly sounds better.
|
06-28-2018, 03:05 PM | #115 |
DEVLMAN
Drives: White 2018 ZL1 Join Date: Dec 2017
Location: Chandler, AZ
Posts: 66
|
I made the adjustment to mine a while back as well.
Mine was over a full turn after making contact. It backed it out until it left about a paper's width as well. I haven't farted around a bunch, but my boost gauge was onto the last tick before hitting 15(11.125lb) when I took it up to 110. Before It wouldn't only go to about half (7.5). Could be a placebo, I don't know; the car definitely feels a bit more zippy. |
12-14-2018, 12:55 PM | #116 |
Drives: 86' Z/28, (2017 ss RIP), 2018 ZL1 Join Date: Oct 2016
Location: Florida
Posts: 68
|
soooo no one has done full testing on this to see all the differences all the way in all the way out little off little pushing etc etc, no check engine lights or issues with moving the screw. what other parameters are changes with the boost?
|
12-14-2018, 04:14 PM | #117 | |
|
Quote:
It doesn't hurt to check it for too much pre-load. But no free lunch here as far as I was able to tell. A very experienced ZL1 tuner says there is nothing to gain here. Leave it alone. Much like a standard ZL1 Ported TB gains are minimal if at all. But if it feels good try it and let us know how it turns out.
__________________
"Democracy Dies in Darkness" |
|
10-09-2020, 08:35 AM | #118 |
Account Suspended
Drives: '21 Wild Cherry ZL1 Join Date: Aug 2018
Location: WI
Posts: 2,082
|
Bringing this back from the dead.
I searched & can’t find lt1z’s original thread. I came across this perusing the HPT forums. Aside from the set screw he stated you should check the actual valve in the blower for seal, & if on a stock tune disconnect the line from the solenoid to bypass. Curious what the current consensus on the valve & adjustment QC is now. |
10-09-2020, 09:11 PM | #119 |
Account Suspended
Drives: '21 Wild Cherry ZL1 Join Date: Aug 2018
Location: WI
Posts: 2,082
|
So no one has any input about this?
I’m going to be yanking my lid this weekend to remove the silencer plate & will be checking seal & valve opening with a mighty vac to see what the correlation between manifold vacuum & valve opening is & checking my actuator adjustment. I’ll get my new laptop set up so I can do some logs next week. |
10-10-2020, 01:07 AM | #120 |
Drives: Canadian 2019 BLACK ZL1 Join Date: Feb 2020
Location: Bourges (France)
Posts: 412
|
In fact that just reduce thé time to open thé throttle and there is less lost of power ... is it that ?
|
10-10-2020, 07:42 AM | #121 | |
Account Suspended
Drives: '21 Wild Cherry ZL1 Join Date: Aug 2018
Location: WI
Posts: 2,082
|
Quote:
In the blower is a bypass valve that during various loads opens to allow air to circumvent the rotors. This valve is controlled by an actuator that sits on the front of the blower. If the pre-load is set incorrectly it results in the valve not closing completely under heavy load. The second issue that I gathered from lt1Z’s other comments around the web was some valves had misalignment so even when the actuator was adjusted properly the valve would not seal properly. The “advertised” manifold pressure was supposed to be around 9psi. From what I have gathered if lt1z’s Findings were correct the blowers were actually pullied to run more pressure, & Chevy was utilizing the Computer to use the bypass to limit manifold pressure. That’s why he said with a stock tune you have to disconnect the line going to the valve. The downside to this is the blower is actually spinning fast enough to create more manifold pressure, but can’t. It then creates a flow loop from past the rotors to before the rotors. This would result in higher air temps. This is purely conjecture at this point, but I’m still going to look into it. |
|
10-22-2020, 12:08 AM | #122 |
Drives: 2012 Camaro V6 Join Date: Mar 2020
Location: Seattle
Posts: 3
|
2013 ZL1
I just got my ZL1 - found a 2013 with 4800 miles on it. Can I make this adjustment on my ZL1? Will it harm the car?
|
10-22-2020, 06:07 AM | #123 |
Account Suspended
Drives: '21 Wild Cherry ZL1 Join Date: Aug 2018
Location: WI
Posts: 2,082
|
|
10-22-2020, 06:13 AM | #124 |
Drives: 2012 Camaro V6 Join Date: Mar 2020
Location: Seattle
Posts: 3
|
2013 ZL1
So is the adjustment the same as I have read on this thread for 5TH GEN?
|
10-22-2020, 06:56 AM | #125 |
Account Suspended
Drives: '21 Wild Cherry ZL1 Join Date: Aug 2018
Location: WI
Posts: 2,082
|
|
10-23-2020, 10:42 AM | #126 |
ZL1 Believer
Drives: 2019 Camaro ZL1 Join Date: Oct 2020
Location: Bangkok, Thailand
Posts: 532
|
Interesting...... I'll wait until I've driven this few thousand before I mess with this....
|
|
|
Post Reply
|
Tags |
adjustment, boost, bypass, lt1z350 |
Thread Tools | |
|
|