Sick intake.. How much did you pay for it?

 

Hi All.

Joe Z intake makes 5 hp, but ours makes 5.235hp:-)

Removing the valve cover breathers from the intake elbow is inline with our goal of reducing all the crap that gets ingested back into the intake, whether from the PCV system (which is mitigated by our Air/Oil Separator) or the valve cover breathers.

The ISF CCSR also vents the valve breathers to atmosphere. Someone here posted a setup where two filters are plugged directly to the right and left fittings on the valve covers... that should be fine, but maybe it will get fouled up because the filters are so close to the opening... or maybe not, I never tried it.

We use high quality stainless T-bolt clamps mainly for aesthetics, as this hose does not see any pressure, its overkill... for now:-)

Rafi

 

I don't know how I missed this thread, thanks.

 

I would take T -bolt clamps regardless if needed or overkill. its nice that your kit comes with it.

 

I still can't figure out how guys think breathers on the cam covers introduce un-metered air into the combustion chamber.... most modified cars run air/oil separators or vent to atmosphere like Compthis. The oil vapors effectively reduce octane count and robs power, so keeping them out of the intake has a few benefits.

 

The PCV system, when working properly, pulls vacuum on the crankcase which pulls vapors and blow-by into the intake where they are combusted. For this to work the system must have airflow which requires an intake air source. Imagine sucking on a straw with your finger over the end. Nothing flows. Remove your finger and air flows through. In the stock design, the air intake for the PCV system comes from the tubes attached to the intake just before the throttle body. This air moves from the intake through the valve covers into the crankcase through the PCV system then into the intake and combustion chamber. Since its coming from the intake after the MAF sensor it is metered. In the RR Design, it would be coming through the breather tube and therefore unmetered. Essentially it would behave just like a vacuum leak. Whether or not it creates a problem depends on the amount of air flowing. The system can automatically adjust fuel trims to compensate to some degree.

At high load and high RPM the engine could create enough blow-by that it forces crank case vapors back through the valve cover tubes and back into the intake. Rafi's design would eliminate this but IMO the main problem we have with ingesting oil is solved with the AOS system. If you are getting oil through the intake tubes there's probably a larger issue with ring seal causing excessive blow-by.

IME most modified cars running valve cover breathers have also disabled the PCV valve or are running Speed Density systems so the unmetered air is not a concern.

 

Just how it's set up but looks nice

 

Everything I got done totaled under 500 dollers

 

Yea took a little but came out good

 

No I have sikky headers/ catless y pipe borla exhaust

 

Sounds like stock but had takeda in it before sounds better with takeda but it runs a lot better and stronger with the rr now to notice change you'll have to exspierience everything yourself but definitely worth every penny

 

No air is going into the intake in the RR system they eliminated those tubes..... So no vac leak, no air going into the combustion chamber that has not came through the intake tube. unless I am really missing something in the pictures. I understand PCV very well and have made several custom catch can/ oil air separators and this should work with no issues and I guess the people running it with no issues proved it.

 

This is not ISF specific but does represent our stock system in principle. Hopefully it will help convey what I am trying to say. Follow the air path and you will see how PCV airflow does end up in the combustion chambers. If you unhook the tubing from the intake (prior to the TB) the system will now pull (unmetered) air from outside and it will end up in the combustion chamber.

I am not saying that the system won't work this way at all. The fuel system will adjust to the unmetered air as long as it stays within the 15% trim window and everyone will be happy. If it goes beyond the 15% trim adjustment you will get a lean code.

 

There better

 

I'm trying to understand something that I thought I always knew to be true but with this discussion, I'm understanding something different. Please help me (the dumb) understand what's happening here. I installed the two breathers beside the cam covers. I was always under the impression that air from the cam covers is being relieved and cycled back to the intake. What I'm understanding now is that air is actually being pulled from the intake and into the locations where I installed the breathers correct?