Vented Rocket cover

[Limbo]

hi all, i've seen on some hi-powered apps they have a vented rocket cover (don't bother about talking about the PCV i know how that works)

like this (borrowed your pic Fatboyz let me know if you want me to remove)



Now can you guys out there let me know if there is any benefit in this?
Just that i noticed i am now picking up abit of blow-by on my car in my catch can and was thinking of doing soemthing like this if its gonna help

[grumpy rooster]

For a start its a rocker cover, not rocket cover.

[trism]

lawl. i hate it when people call it a rocket cover. it just shows there complete lack of knowledge.

those vents just go to the catch can.

[Slaz]

Here you go Limbo

Taken from the Endyn site, and explains why they are beneficial and saved me typing something similar.

This kit uses fittings that take advantage of the large oil return galleries at the back of B series blocks so no rocker cover mods are needed, though in saying that, big HP and big revving engines sometimes have sufficent crankcase pressure, that reliefs in both areas are required to keep it under control.

Another good product made by Vibrant performance, is a screw on addition to your oil filler location that allows for a breather tube to be run to a catch can instead of hacking your rocker cover.

Hope this answers your question,

Cheers.

The new Endyn breather kit has been in development for over 4 years. It's designed to provide high performance Honda B series engines with efficient crankcase breathing, while eliminating excessive intake charge oiling and the detonation associated with it.

Regardless of piston ring condition, all Honda VTEC engines all suffer from excessive crankcase pressure at high power and RPM levels. This is caused by extreme piston speed, long camshaft timing events, and a PCV system that is completely inadequate at high throttle angles and low manifold vacuum levels.

Many of today's large displacement B series engines are based on new blocks where Honda deleted the breathing "can" (on the rear of the block), causing these engines really suffer from extreme crankcase pressure (frequently high enough to rush past the seals, blowing the spark plug wires off the plugs.) Pressures like these cause oil and other contaminates to severely degrade the quality of the mixture in the cylinders, reducing power and greatly increasing the possibility of detonation.

[Limbo]

thanks slaz looks like this will have to be a next mod.
Just need to find space for another catch can

Sorry guys for referring to it as a rocket cover, typo.

[Slaz]

No prob Limbo, good to hear your car is behaving for you, last time i was there Adrian @ Toda had an Endyn breather kit in stock if you were planning on running one one of them.

[SLOWEGG]

Just releases pressure from the engine, good for boosted cars. Remove the pcv system from the back of your block and run it to a catch can.

[Limbo]

Just releases pressure from the engine, good for boosted cars. Remove the pcv system from the back of your block and run it to a catch can.

I've already done that but not catching anything

[fatboyz39]

thats fine using my pic.

After doing these breather mods, intake manifold is alot cleaner.

[jords]

how difficult is the DIY?

[Weq]

hi all, i've seen on some hi-powered apps they have a vented rocket cover (don't bother about talking about the PCV i know how that works)

See this is the your problem. You DONT know ANYTHING about the PVC system is u think this isnt related.

Positive Crankcase Ventilation.

The head is connected to the crank case (bottom end) via many oil passages. as pressure builds, it builds in the topend of the motor. These ports are useful in hi-po setups. Or setups were ring-gaps/piston to wall are kept a little larger, increasing pressure inside the motor. These help evacuate the increased gas volume, quickly and efficently.

On a stock motor with good compression, its just a little bling. A normal catch-can setup will have the same effect.

[Limbo]

See this is the your problem. You DONT know ANYTHING about the PVC system is u think this isnt related.

Positive Crankcase Ventilation.

The head is connected to the crank case (bottom end) via many oil passages. as pressure builds, it builds in the topend of the motor. These ports are useful in hi-po setups. Or setups were ring-gaps/piston to wall are kept a little larger, increasing pressure inside the motor. These help evacuate the increased gas volume, quickly and efficently.

On a stock motor with good compression, its just a little bling. A normal catch-can setup will have the same effect.

i know that as i already have a catch can setup. I was wondering if there was anymore benefit in getting the rocker cover vented more than the PCV setup.

This is how mine is already setup





I was speaking to a yamaha racing mechanic and he said that the increase in pressure helps crease more power, but at more wear to the engine.
But since they rebuild their engines every 2nd race it didn't matter.

I'll be looking into getting the extra openings in my rocker cover also, just need a spare rocker cover to work on.