01-05-2020, 05:17 PM | #1 |
Drives: 2018 2ss 1le Join Date: Jan 2018
Location: Huntington, NY
Posts: 474
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disconnecting vacuum bypass
Does any one ever drive their PD Blower with the bypass disconnected and plugged.
I wonder in around town driving how much penalty there would be in gas mileage as opposed benefit in drivability. for sure it would be a big deal on long trips but for the track or around town I think it would be better, anybody do this...
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2018 2ss 1le roto fab dry, Stainless works 1 7/8 lt to 3'" x pipe with highflow cats to stock npp, soler 95mm t/b, edelbrock 2300, LT4 fueling , jms bap and dsx flex fuel, 618/620 on e45 rwhp
Jannetty Motorsports tuned |
01-05-2020, 05:51 PM | #2 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
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Why? Its open when cruising so basically the blower is free wheeling and just along for the ride until you get into the throttle and closes the actuator and then goes into boost. That's how the Magnuson works so I'm assuming the 2300 Ebrock would do the same.
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01-05-2020, 06:49 PM | #3 |
Drives: 2018 2ss 1le Join Date: Jan 2018
Location: Huntington, NY
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I feel like I can feel it switch on and off
a little annoying I would think at the race track (not dragstrip) it could get in the way.
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2018 2ss 1le roto fab dry, Stainless works 1 7/8 lt to 3'" x pipe with highflow cats to stock npp, soler 95mm t/b, edelbrock 2300, LT4 fueling , jms bap and dsx flex fuel, 618/620 on e45 rwhp
Jannetty Motorsports tuned |
01-05-2020, 09:53 PM | #4 |
Drives: 2019 ZL1 Crush Join Date: Jan 2019
Location: Colorado Springs
Posts: 564
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@edfhobbies
Seemed you mentioned something about this being an issue on the older eForce?
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2019 Crush A10
E-Force 2650 670WHP 615WTQ All besides the 2650 is bone stock down to the air filter. |
01-06-2020, 06:35 AM | #5 |
Drives: 1997 Camaro SS LT4 Join Date: Jan 2019
Location: Deltona, FL
Posts: 47
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Yes...The Edelbrock functions the same.
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2018 Camaro 2SS M6 Hot Wheels,Edelbrock 2650, Hurst Short Throw Shifter. Production Number 90
1997 Camaro SS M6 LT4 tribute |
01-06-2020, 06:39 AM | #6 | |
Drives: 1997 Camaro SS LT4 Join Date: Jan 2019
Location: Deltona, FL
Posts: 47
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Quote:
You can use a vacuum restrictor in the vacuum line to slow down the response. I had one sent to me from Edelbrock. Its just a nitrous jet. I put it in and the took it out.
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2018 Camaro 2SS M6 Hot Wheels,Edelbrock 2650, Hurst Short Throw Shifter. Production Number 90
1997 Camaro SS M6 LT4 tribute |
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01-06-2020, 08:00 AM | #7 |
Drives: 2018 2ss 1le Join Date: Jan 2018
Location: Huntington, NY
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did it help
the on/off feeling
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2018 2ss 1le roto fab dry, Stainless works 1 7/8 lt to 3'" x pipe with highflow cats to stock npp, soler 95mm t/b, edelbrock 2300, LT4 fueling , jms bap and dsx flex fuel, 618/620 on e45 rwhp
Jannetty Motorsports tuned |
01-06-2020, 07:25 PM | #8 |
Drives: 1997 Camaro SS LT4 Join Date: Jan 2019
Location: Deltona, FL
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Yes. This smooths out the boost. The nitrous jet size was .015. Below is a picture that represents a bypass valve and location of the nitrous jet.
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2018 Camaro 2SS M6 Hot Wheels,Edelbrock 2650, Hurst Short Throw Shifter. Production Number 90
1997 Camaro SS M6 LT4 tribute |
01-06-2020, 08:06 PM | #9 |
Drives: 2018 2ss 1le Join Date: Jan 2018
Location: Huntington, NY
Posts: 474
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and you left it in and liked it..
it was not clear if you put it in then took it out.. was that you main compliant the on/off feeling?
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2018 2ss 1le roto fab dry, Stainless works 1 7/8 lt to 3'" x pipe with highflow cats to stock npp, soler 95mm t/b, edelbrock 2300, LT4 fueling , jms bap and dsx flex fuel, 618/620 on e45 rwhp
Jannetty Motorsports tuned |
01-08-2020, 07:26 AM | #10 |
Dyno Show Queen LOL
Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014
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I think the only harm would be for the bypass to be stuck closed.. excessive heat who knows what else.. You don't have a gauge I assume but on the zl1 with low shifts the boost never gets really above 0 psi and hangs in vacuum most of the time.
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01-08-2020, 09:23 AM | #11 |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
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If the surge valve is working right then it is open under part throttle driving as there isnt any vacuum which is what pulls the surge valve closed and allows boost to build up. AS soon as you release the throttle and vacuum drops off the surge valve opens back up and bleeds the boosted air back off.
If you take the vacuum reference line off of the surge valve it means it wont even close and boost will not build.
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01-08-2020, 09:30 AM | #12 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
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I believe the OP is complaining about the bypass being too much like a on/off switch. So it goes from nothing to kill with just the slightest increase in throttle. Placing a restrictor in the vacuum line will slow down the speed at which the bypass closes and smooth the transition from vacuum to boost.
I believe this is why the factory LT4 has a electronic bypass solenoid where the aftermarket stuff is just a mechanical vaccum operated unit.
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01-08-2020, 12:36 PM | #13 |
Drives: 2018 2ss 1le Join Date: Jan 2018
Location: Huntington, NY
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when there is vacuum there is no boost...
it when the vacuum goes away that it closes and builds boost. an yes its the on off feeling, I did not know lt4 had electronic control.. I wonder if there is a way to make that work?
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2018 2ss 1le roto fab dry, Stainless works 1 7/8 lt to 3'" x pipe with highflow cats to stock npp, soler 95mm t/b, edelbrock 2300, LT4 fueling , jms bap and dsx flex fuel, 618/620 on e45 rwhp
Jannetty Motorsports tuned |
01-08-2020, 05:37 PM | #14 | |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
Location: Norman, OK
Posts: 2,424
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Quote:
And yes you are correct, I had the vacuum reference backwards.
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2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp
2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD |
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