I've added an application note to my website which should better describe the differences between the kits from a performance perspective.
http://dougshelbyengineering.com/upl...ation_Note.pdf
Single sealed catch can kit P/N: DSE-VP-CC-002-SSK
Pros:
o Passenger side installation will condition gasses that enter the intake manifold
o Keeps the emissions system intact, including the PCV valve
o Cost effective
Cons:
o Only working when the PCV valve is open
o Does not address WOT condition where PCV valve can close (see below)
o PCV valve may close at Full Throttle / High RPM / High Load (when highest volume of blow by gas is generated):
untreated blow by gasses are forced back into the airbox
crank case pressure may build if airbox line is too restrictive, robbing performance
Any modification that adds torque or HP will increase the odds of this scenario
Recommended for:
o Mild street driving for stock or mildly modified engines
Dual sealed catch can kit P/N: DSE-VP-CC-002-DSK
Pros:
o Passenger side installation will condition gasses that enter the intake manifold
o Driver side installation will condition gasses that enter the airbox
o Keeps the emissions system intact, including the PCV valve
Cons:
o More expensive than the single kit
o Address the results of the WOT condition where PCV valve closes, but not the cause (see below)
o PCV valve may close at Full Throttle / High RPM / High Load (when highest volume of blow by gas is generated):
blow by gasses are forced back into the airbox through driver side can
crank case pressure may build if airbox line is too restrictive, robbing performance
Recommended for:
o All stock Vipers driven with a decent amount of spirited street or track driving
o All Vipers that have been more than mildly modified
Dual sealed catch can kit (PCV Delete) P/N: DSE-VP-CC-002-DSPCV (coming soon)
Pros:
o Passenger side installation will condition gasses that enter the intake manifold
o Driver side installation will condition gasses that enter the airbox
o Address the cause of the WOT condition where PCV valve closes by removing PCV and changing airflow
Crankcase pressure buildup at high RPM/throttle/load is reduced or eliminated
• Larger lines to airbox
• Both cans are actively cleaning each side of the engine via airbox vacuum
Benefits of the vented system without being open to atmosphere
Cons:
o More expensive than the single kits
o PCV valve is removed, intake manifold is capped, airbox line is changed, therefore emissions system is modified
o IAT might be slightly higher as compared to the other systems
Recommended for:
o All stock Vipers driven with a decent amount of spirited street or track driving
o All Vipers that have been more than mildly modified
o Track cars not wanting to use a vented system
Single can vented catch can kit (OFFROAD ONLY) P/N: DSE-VP-CC-002-SVK
Pros:
o No crankcase air is entering the intake manifold or airbox
o Cost effective way to reduce crankcase pressure build
o IAT will be lower than and of the sealed kits
Cons:
o Single can
will not have the ability to flow or clean as much as a dual sealed PCV delete or vented setup
lower capacity, more frequent emptying
installation is not as clean as a dual vented setup as hoses cross the engine bay
o PCV valve is removed, intake manifold and airbox are capped, therefore emissions system is modified
o Open to atmosphere, recommend increased oil changes after every event
o Possible fumes / residue / smoke from filters
Recommended for:
o Offroad use only, track vehicles with regularly changed fluids
Dual vented catch can kit (2 cans, OFFROAD ONLY) P/N: DSE-VP-CC-002-DVK
Pros:
o Better flow and pressure reduction than the single vented kit
o Higher capacity than the single vented kit
o Cleaner installation than the single vented kit
o No crankcase air is entering the intake manifold or airbox
o IAT will be lower than any of the sealed kits
Cons:
o More expensive than the single vented kit
o PCV valve is removed, intake manifold and airbox are capped, therefore emissions system is modified
o Open to atmosphere, recommend increased oil changes after every event
o Possible fumes / residue / smoke from filters
Recommended for:
o Offroad use only, track vehicles with regularly changed fluids
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