L83 L93 Gen V How to Kill a Vacuum Pump - LS1TECH - Camaro and Firebird Forum Discussion

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L83 L93 Gen V How to Kill a Vacuum Pump

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Old 01-24-2016, 11:13 PM
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Default L83 L93 Gen V How to Kill a Vacuum Pump

I'll post a picture or two and some part numbers on how to get rid-off the vacuum pump.

Last edited by mzrico; 01-31-2016 at 07:22 AM. Reason: too long.
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Old 01-24-2016, 11:26 PM
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Default L83 Vacuum Pump location.

This is a public photo of the new L83. Notice the Vacuum Pump immediately bellow the water pump pulley on the driver side:
Attached Thumbnails L83 L93 Gen V  How to Kill a Vacuum Pump-l83-vacuum-pump.jpg  
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Old 01-24-2016, 11:36 PM
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Default L83 Vacuum Pump location.

This photo of the Corvette LT1 engine shows the same aluminum block structure without the trucks vacuum pump. Corvettes come with an electronic vacuum pump. In the corvette the supply and return oil holes that lubricate the mechanical truck pump are plugged from the factory.
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Old 01-24-2016, 11:52 PM
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Default L83 LT1 vacuum pump delete.

This photo of my own engine and GM part and part number shows the location of the two plugs. The big difference in looks from truck to corvette engine is from the water pumps (truck pulley is to the driver side and corvette pulley is to the passenger side). Also the intakes are very different. But the new truck intakes look more like a LS6 or LS3 intake. It is also significantly lowered profile which helps package the engine in multiple cars or trucks.
Attached Thumbnails L83 L93 Gen V  How to Kill a Vacuum Pump-l83-plug-installation-1.jpg   L83 L93 Gen V  How to Kill a Vacuum Pump-l83-plug-installation.jpg   L83 L93 Gen V  How to Kill a Vacuum Pump-l83-plug.jpg  
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Old 01-26-2016, 08:09 PM
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Where on the GEN V are you taking the brake booster vacuum from?
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Old 01-28-2016, 10:23 AM
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Default L83 intake source for power brake vacuum.

Originally Posted by GENIIIDude View Post
Where on the GEN V are you taking the brake booster vacuum from?
My first choice for Power Brake Vacuum will be the EVAPORATOR/PURGE CONTROL VALVE (Number 36 on the diagram). This is an electronic controlled valve used to allow fuel tank fumes to enter the intake. It is part of the emissions system. Since I am not using this valve I hope to get sufficient vacuum for the brake booster from its port. I won't have my wire harness for 6 weeks, so a test will have to wait. I spoke with Jared at ICT billet and I ordered part number 551359 (LT L83 L86 LT1 Billet Purge Solenoid Delete Plug Evap Block Off Gen V Intake Manifold). My plan is to drill and tap ICTs billet aluminum plug for a 3/8 fitting to run a vacuum line to the booster. As soon as I get it install I will post photos.
Attached Thumbnails L83 L93 Gen V  How to Kill a Vacuum Pump-l83-intake-diagram.jpg   L83 L93 Gen V  How to Kill a Vacuum Pump-l83-purge-solenoid-plug.jpeg  
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Old 05-01-2016, 02:39 AM
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Still waiting on harness.
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Old 05-15-2016, 02:23 PM
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Default L83 Harness from Current Performance Wiring

Finally it is here. I'll be installing it soon. Looking forward to hearing the engine run.
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Old 05-15-2016, 02:56 PM
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Default L83 Harness from Current Performance Wiring

L83 Harness
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Old 05-15-2016, 07:44 PM
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who did your wiring harness? speartech told me I couldn't use my stock 02 sensors with their harness.
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Old 05-16-2016, 02:34 PM
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Default L83 Harness

Hello. I sent my harness to Current Performance Wiring in Florida. They reworked it to run as a stand alone system. I am working on it this week to see if I can fire up my engine.
I'll post my results soon.

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Old 05-17-2016, 09:21 AM
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Originally Posted by mzrico View Post
Hello. I sent my harness to Current Performance Wiring in Florida. They reworked it to run as a stand alone sysrem. I am working on it this week to see if I can fire up my engine.
I'll post my results soon.
I saw they reworked for a pretty reasonable price. I just didn't know how the length would work out as it seems id have to mount computer in engine bay instead of cab. where are you mounting yours? what are you putting your setup in? thanks for advice.
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Old 05-19-2016, 12:37 AM
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Default L83 factory Harness

Originally Posted by 06redneck View Post
I saw they reworked for a pretty reasonable price. I just didn't know how the length would work out as it seems id have to mount computer in engine bay instead of cab. where are you mounting yours? what are you putting your setup in? thanks for advice.
I am installing my set up in a 69 Camaro. The factory harness was reworked to be a stand alone system for $630. Also you are correct, the length is an issue for two reasons. First it is too short to hide the ECM (if you are doing a custom show quality installation it won't work). Second the GEN 5 harness ECM connectors end at the front driver side of the engine (ugly). A new, made with extra length, harness from Current Performance starts at $1300.
If I use my harness as it is, I can mount the ECM and Fuse/Relay box on the driver side inner fender. But the look and final result would be a practical one.
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Old 05-19-2016, 11:13 AM
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I've been checking back on this thread for a while. I have a GenV engine that I'm getting ready to use and hope to do something similar.

I'm curious to see how the wiring harness works out and the results of your vacuum test.
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Old 05-23-2016, 08:29 AM
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Default L83 power brake vacuum source.

Originally Posted by Deloss View Post
I've been checking back on this thread for a while. I have a GenV engine that I'm getting ready to use and hope to do something similar.

I'm curious to see how the wiring harness works out and the results of your vacuum test.
I am getting very close to firing my engine and measuring the vacuum pressure. I will post my results by next week if all goes well.
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Old 05-26-2016, 10:40 AM
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Default L83 Harness factory ECM locatio.

This photo shows the location of the ECM when using the factory harness.
Attached Thumbnails L83 L93 Gen V  How to Kill a Vacuum Pump-20160523_201714.jpg  
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Old 06-14-2016, 11:36 PM
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Hey there man, any updates? I have the same setup and want to install it in a 72 chevy truck and would love to see your progress... It looks like you are you using the dirty dingo brackets?
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Old 06-15-2016, 09:42 PM
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It looks as though the DD brackets looks the best on this engine I'm about to pull the trigger for them as well and I too am curious to see the results on the vacuum setup!!
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Old 06-21-2016, 09:44 PM
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Unable to test the engine just yet. The harness from Current Performance Wiring is not working. I got to talk to Jared (owner ) and still no answer yet. I will post information about the harness and what solution I get from Current Performance Wiring. If I don't get a solution I'll be sure to let everyone know ASAP.

In a more positive note I go
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Old 06-23-2016, 01:25 PM
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Any word back from current performance about your harness?
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