And so it begins....................
Discussion
This ones for you chilli lad.
Just fitted my old catch tank in a new position.
Hoses taken from each rocker box to a Y piece and then to tank. Tank vented through a K&N filter.
I'll buy some ally plate to remake the top brackets at some time to replace the crappy steel ones I knocked up.
Just fitted my old catch tank in a new position.
Hoses taken from each rocker box to a Y piece and then to tank. Tank vented through a K&N filter.
I'll buy some ally plate to remake the top brackets at some time to replace the crappy steel ones I knocked up.
db484bhpv8 said:
Maybe i am missing something. But how will that exploit the crankcase pressure?
Nothing missed.It just vents both rockers.
It's a work in progress and time is tight to sort out a better deal before next Saturdays TD.
I have another vent to fit in the system from the dizzy aperture but not now.
SILICONEKID343HP said:
What is wrong with the original setup ? I thought the throttle disc gets lubricated by the breather pipe.
I believe problems occur during TDs and with high performance engines.When the engine is running flat out for long periods, oil can be drawn into the plenum and certainly a lot of oil mist can escape through the mushroom vent.
phazed said:
This ones for you chilli lad.
Just fitted my old catch tank in a new position.
Hoses taken from each rocker box to a Y piece and then to tank. Tank vented through a K&N filter.
I'll buy some ally plate to remake the top brackets at some time to replace the crappy steel ones I knocked up.
Hmmm... Do you know what the pipework/baffle configuration inside the catch tank is Peter?Just fitted my old catch tank in a new position.
Hoses taken from each rocker box to a Y piece and then to tank. Tank vented through a K&N filter.
I'll buy some ally plate to remake the top brackets at some time to replace the crappy steel ones I knocked up.
phazed said:
I cut of the top of the mushroom and took a hose from there to a Y piece and then to the catch tank.
I thought that the air entered via the mushroom filter, to the crank and then out of the flame trap into the throttle. With your arrangement how does any air move into and out of the rocker covers ? Why not just put the catch tank between the Flame trap and the throttle ?Pink_Floyd said:
I thought that the air entered via the mushroom filter, to the crank and then out of the flame trap into the throttle. With your arrangement how does any air move into and out of the rocker covers ? Why not just put the catch tank between the Flame trap and the throttle ?
That's far too easy.I have another breather that fits in the dizzy hole and will use that as a breather.
I have been following this in the certainty that a good education in my dim and distant past will come to my aid, and I will suddenly understand all this talk of catch tanks, flame traps and so on.
To date I have understood the word "dizzy", but for me so far all it relates to is my teenage years and the famous hit by Tommy Roe.
To date I have understood the word "dizzy", but for me so far all it relates to is my teenage years and the famous hit by Tommy Roe.
SILICONEKID343HP said:
I`m wondering if we are making problems which do not exist . What are the symptoms of Crank case pressure ?
Oil leaks 
and if still using the Rover PCV system a plenum filled with oil 
followed by a James Bond style smoke screen 
with big power increases with the RV8 I would also shy away from the original PCV system its far to easy to overload its function 
my opinion is keep the stock system till it cant cope with the increased crankcase breathing any more (tuned/more power) because it does a good job otherwise in so much as it keeps the engine oil cleaner for longer thus keeping the inards cleaner 
Edited by Sardonicus on Monday 11th November 16:14
Sardonicus said:
SILICONEKID343HP said:
I`m wondering if we are making problems which do not exist . What are the symptoms of Crank case pressure ?
Oil leaks and if still using the Rover PCV system a plenum filled with oil followed by a James Bond style smoke screen with big power increases with the RV8 I would also shy away from the original PCV system its far to easy to overload its function my opinion is keep the stock system till it cant cope with the increased crankcase breathing any more (tuned/more power) because it does a good job otherwise in so much as it keeps the engine oil cleaner for longer thus keeping the inards cleaner Sardonicus said:
il leaks and if still using the Rover PCV system a plenum filled with oil followed by a James Bond style smoke screen with big power increases with the RV8 I would also shy away from the original PCV system its far to easy to overload its function my opinion is keep the stock system till it cant cope with the increased crankcase breathing any more (tuned/more power) because it does a good job otherwise in so much as it keeps the engine oil cleaner for longer thus keeping the inards cleaner
How do you get "increased crankcase breathing" with a tuned motor???? and if still using the Rover PCV system a plenum filled with oil followed by a James Bond style smoke screen with big power increases with the RV8 I would also shy away from the original PCV system its far to easy to overload its function my opinion is keep the stock system till it cant cope with the increased crankcase breathing any more (tuned/more power) because it does a good job otherwise in so much as it keeps the engine oil cleaner for longer thus keeping the inards cleaner Edited by Sardonicus on Monday 11th November 16:14
Engine built that doesn't seal (eg rocker covers)?
Rings that pass more combustion gas into crankcase?
Leaky valve guides?
Change in vacuum from wilder cam?
(we have a system running happily on what Rob described as his wildest ever road cam a few years ago all that was required was to create a 1mm restriction piped from near the air filter to replace the standard mushroom).
I really can't see a reasonably built tuned motor being anywhere as hard to ventilate as s
tty old unloved Land Rover lumps?spend said:
How do you get "increased crankcase breathing" with a tuned motor????
Engine built that doesn't seal (eg rocker covers)?
Rings that pass more combustion gas into crankcase?
Leaky valve guides?
Change in vacuum from wilder cam?
(we have a system running happily on what Rob described as his wildest ever road cam a few years ago all that was required was to create a 1mm restriction piped from near the air filter to replace the standard mushroom).
I really can't see a reasonably built tuned motor being anywhere as hard to ventilate as stty old unloved Land Rover lumps?
More CR more crankcase pressure Dave for kick off Engine built that doesn't seal (eg rocker covers)?
Rings that pass more combustion gas into crankcase?
Leaky valve guides?
Change in vacuum from wilder cam?
(we have a system running happily on what Rob described as his wildest ever road cam a few years ago all that was required was to create a 1mm restriction piped from near the air filter to replace the standard mushroom).
I really can't see a reasonably built tuned motor being anywhere as hard to ventilate as s
tty old unloved Land Rover lumps? then factor in increased RPM for longer periods etc i.e track-days forced induction & nitrous 
I'm pro PCV anyway never liked open breathers or catch tank's doing an impression of Ivor The Engine when hot on idle anyway Edited by Sardonicus on Monday 11th November 17:07
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