LS7 breather system
Discussion
Gents - after some advice from anyone with an LS7 install...
There seems to be several ways to pipe up the breather system (oil tank, crank case & rocker covers) depending on who you talk to. If anyone can share their specific routing of pipework or send me some photos I'd appreciate it. Want to avoid an oil carry over to the intake manifold, yet allow the tank and crank case to be equal pressure if the scavenge side pump pushes a load of air through the return.
Mine is Stock LS7 with Ultima dry sump kit
Cheers
Paul
There seems to be several ways to pipe up the breather system (oil tank, crank case & rocker covers) depending on who you talk to. If anyone can share their specific routing of pipework or send me some photos I'd appreciate it. Want to avoid an oil carry over to the intake manifold, yet allow the tank and crank case to be equal pressure if the scavenge side pump pushes a load of air through the return.
Mine is Stock LS7 with Ultima dry sump kit
Cheers
Paul
Although I did not personally install my engine (factory did it), the piping that I fitted prior to the engine going in (as per factory instructions) was a braided breather hose from the top of the dry sump tank to three rubber breather hoses - one to each rocker cover and one to the MAF housing elbow.
I hope that info helps.
Regards
I hope that info helps.
Regards
The GM/factory method appears to be a halfway-house system, as they seem to have 'dirty and clean' breather area's maybe to take advantage of modern lubricants longer life and reduce changes.... similar to iridium plugs.
A true dry-sump system would not normally have breathers on the engine at all, the scavenge system is there to remove as much fluid (oil), vapour and positive pressure as possible. The removal of oil and vapour for consistent lubrication reasons, and positive pressure removal to maximise perfomance enhancing components (low tension rings, seals, combustion contaminants etc).
Either system works but which way you plumb it up might depend on what dry-sump kit/internal engine components you have and how effectively they are supposed to perform. IE are very high performance (usually aftermarket) internals fitted to your motor and how many stages/ports does your pump have?
If you can cope with regular oil changes I dont see why a engine-breatherless system (probably most effective from a performance and 'fine tune' point of view) cannot be used.
You can watch a full breakdown on you-tube of how a GM factory dry-sump system works, its quite clever and obviously very cost effective to mass produce.
A true dry-sump system would not normally have breathers on the engine at all, the scavenge system is there to remove as much fluid (oil), vapour and positive pressure as possible. The removal of oil and vapour for consistent lubrication reasons, and positive pressure removal to maximise perfomance enhancing components (low tension rings, seals, combustion contaminants etc).
Either system works but which way you plumb it up might depend on what dry-sump kit/internal engine components you have and how effectively they are supposed to perform. IE are very high performance (usually aftermarket) internals fitted to your motor and how many stages/ports does your pump have?
If you can cope with regular oil changes I dont see why a engine-breatherless system (probably most effective from a performance and 'fine tune' point of view) cannot be used.
You can watch a full breakdown on you-tube of how a GM factory dry-sump system works, its quite clever and obviously very cost effective to mass produce.
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