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Old 02-10-2019, 01:30 AM   #1
rtmpgt
 
Drives: Holden Commodore V6, 2010
Join Date: Feb 2019
Location: Australia
Posts: 2
Where to tap vacuum on LFX?

Greetings from down under!

I've got a 2010 Commodore SV6 Ute (Basically the exact same car as a Pontiac G8 but with a manual 5th Gen Camaro V6 driveline) and I was wanting to know where you would recommend to tap a vacuum feed from the LLT? I know where to tap in to on an LY7, but the LLT has a fundamentally different Intake manifold layout due to the DI.

Mine also has what appears to be a vacuum pump at the front of the engine which takes care of the brakes. Do you guys have these stateside? If so, is this an appropriate place? Don't want to be chopping anything to do with brake pressure!

I've got some vacuum-actuated exhaust mufflers off a HSV GTS that I'm fitting, and since these mufflers aren't technically designed for a sixer, I need to find a suitable location to run a Vacuum block from. I plan on fitting the two mufflers and also a vacuum gauge. Since this'll be a supercharged build in the future, i'd also like to perhaps stick it in a place where boost can be read as well, for a boost controller.

Also, where do you guys who run catch cans plumb them in to? Once again, i know what lines to tap in to on an LY7, but i'd need to know where to go for the LLT.

Glad to see you guys in the states actively supporting the six!
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Old 02-10-2019, 09:59 AM   #2
DSX_Camaro

 
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Drives: 2013 SW 2LT/RS LFX/AY6
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Location: Orlando, FL
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So, as long as your LLT has the same manifold set up as an LFX, I think I can help with the mufflers in a very roundabout kinda way. When I fitted the vacuum actuated mufflers to my car, I just swapped my brake booster line to this version (22946879 part number) which has a vacuum check valve installed as a tap. It's for the LFX equipped with the active exhaust for the factory. Worked like a charm.
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brakes, lines, llt, modifications, vacuum


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