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08-19-2017, 02:23 PM
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#1 | |
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Account Suspended
Drives: 2017 50th 2SS Join Date: Jan 2017
Location: MN
Posts: 267
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running a procharger and the standard bypass valve? Might want to look in here
Might want to take a look at yours too, have been battling boost leaking since i installed my kit to the point where we've had the bumper off 3x to triple check connections.....come to find out its the valve itself. It doesn't seal whatsoever. seems i'm not the only one either, Sarah D just posted on the 6th gen facebook page a pic of hers too and that's what prompted me to check mine. Not sure all of them are bad or just mine and what looked like the gals from Facebook but these look massed produced so its not likely isolated but who knows
I plan to call them monday, but hopefully one of their guys is online today and will see this. added a video to show what i am seeing a bit better: Last edited by jwdominick; 08-22-2017 at 06:38 PM. |
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08-19-2017, 04:55 PM
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#2 |
  
Drives: 2017 50th Anniversary 2SS Join Date: Sep 2016
Location: Jacksonville, FL
Posts: 930
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Wow!. that doesn't look right at all!. Does it seem like an adjustment issue or a design flaw?
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Former Ride: 17 Camaro 2SS, M6 - Fifty | Procharger P1SC | 3.7 Pulley | Stage 2 IC | Race Bypass | DSX FF Kit | JRE Custom E85 Flex Fuel Tune | LT4 Fuel System | JMS Voltage Booster | MSD Plug Wires | American Racing 1-7/8's LT Headers Full System Catback | Baro Breakout Harness | LT4 Map Sensor | Katech Ported TB | MMS Oil Catch Can | 160 Thermo | Solo Performance J-Pipes
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08-19-2017, 05:01 PM
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#3 |
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Account Suspended
Drives: 2017 50th 2SS Join Date: Jan 2017
Location: MN
Posts: 267
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Butterfly valve is fully closed, this simply shows the clearance left by the machining process. Bad design. If ATI feels that's an acceptable amount of leak, I'd be shocked. Any boosted applications we've done before no amount of leak was acceptable. Just uploading a video demonstration now to YouTube. I'll attach it here shortly
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08-19-2017, 05:08 PM
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#4 |
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Account Suspended
Drives: 2017 50th 2SS Join Date: Jan 2017
Location: MN
Posts: 267
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08-19-2017, 05:54 PM
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#5 | |
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Drives: 2017 50th Anniversary 2SS Join Date: Sep 2016
Location: Jacksonville, FL
Posts: 930
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Quote:
 That is quite a leak for sure!. Anyone with this valve needs to definitely check and see if they're experiencing the same loss.
__________________
Former Ride: 17 Camaro 2SS, M6 - Fifty | Procharger P1SC | 3.7 Pulley | Stage 2 IC | Race Bypass | DSX FF Kit | JRE Custom E85 Flex Fuel Tune | LT4 Fuel System | JMS Voltage Booster | MSD Plug Wires | American Racing 1-7/8's LT Headers Full System Catback | Baro Breakout Harness | LT4 Map Sensor | Katech Ported TB | MMS Oil Catch Can | 160 Thermo | Solo Performance J-Pipes
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08-20-2017, 07:08 PM
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#6 |
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Drives: 2016 1SS D1SC Methfed Lowered Wrapd Join Date: Apr 2016
Location: CA
Posts: 632
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Well ****... does this mean we have to see our tuners again?
Hopefully Erik can chime in and put some perspective on this. I don't mind running the race valve if I must but it would have been nice to know about this before we went out and dropped cash on tuning. A 5 psi drop seems pretty drastic. |
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08-20-2017, 07:12 PM
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#7 | |
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Drives: 2016 1SS D1SC Methfed Lowered Wrapd Join Date: Apr 2016
Location: CA
Posts: 632
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Found this as well. Looks like procharger made a mention in the comments.
Maybe we can get this clarified too...... Is the valve not shut all the way during a lack of vacuum and reopened during vacuum? Seems like the rep that commented is saying that the leak is part of operation? Akh i knew i should have stayed off the forums today lol |
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08-20-2017, 07:13 PM
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#8 |
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Account Suspended
Drives: 2017 50th 2SS Join Date: Jan 2017
Location: MN
Posts: 267
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Erik chimed in on Facebook. Said it was designed that way. Says all butterfly valves leak like that but the blower makes up for it. Obviously that answer doesn't jive with me. So a boost leak is allowed because the blower has more than enough capacity to make up for it? He says the benefits of the faster actions of the butterfly valve outweigh the leak. I have a piston style valve coming from tial, I'll do a back to back comparison and see if I can not only log a boost change but feel/the difference and then dyno if so.
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08-20-2017, 07:17 PM
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#9 |
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Drives: 2016 1SS D1SC Methfed Lowered Wrapd Join Date: Apr 2016
Location: CA
Posts: 632
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Do you have a link to the BOV? It would be cool if we get a different sound out of that thing too. I used to have a synapse BOV on my turbo mustang. That thing sounded awesome.
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08-20-2017, 07:18 PM
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#10 |
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Account Suspended
Drives: 2017 50th 2SS Join Date: Jan 2017
Location: MN
Posts: 267
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http://www.tialsport.com/index.php/t.../140-tialbvqrj is the one I have in route.
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08-21-2017, 04:28 PM
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#11 |
Drives: 2017 Nightfall Grey Auto 2SS Join Date: Mar 2012
Location: Blue Springs MO.
Posts: 525
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That's normal and has been like that for several years. Can you switch to something and pick up a little boost maybe maybe not,
If you switch don't cry if the valve hangs closed when you let off the throttle 
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08-21-2017, 04:39 PM
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#12 |
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Account Suspended
Drives: 2017 50th 2SS Join Date: Jan 2017
Location: MN
Posts: 267
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The valve on a plunger/piston style valve one won't hang. That's the style I'm going to. Just like I have run on every other boosted vehicle I've owned previously.
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08-21-2017, 05:37 PM
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#13 | |
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Drives: 2017 Nightfall Grey Auto 2SS Join Date: Mar 2012
Location: Blue Springs MO.
Posts: 525
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Quote:
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08-22-2017, 01:07 PM
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#14 | |
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Drives: Many C7's Join Date: Apr 2014
Location: Kansas City
Posts: 573
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Quote:
This thread should be locked,..... this literally is getting old chasing around FB and now the forums, on something that isn't even an issue. TRUST ME GUYS, that tiny tiny tiny leak of like less than 2 cfm, is NOTHING to worry about when your blower is moving HUNDREDS of CFM!!! The blade doesn't make contact because you don't WANT IT TO. Same reason your TB doesn't actually make 100% contact. Cause if it did, it could get stuck with temperature changes and wear. Due to a very simple aerodynamic principle called "Vena Contracta" (google it) the leak this valve has at low CFM stays the same as pressure and flow increase behind it. PLEASE DO NOT GET SUCKERED INTO BUYING SOMETHING YOU DON'T NEED! NOTE: If you do want to waste $$$, we do offer a "Bullet" valve, that has a 100% seal. (which again, will show no change in boost pressure) |
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