Hi,

Just installed a K&N Typhoon Cold Air Intake (69-4515TS) on my 2009 Cobalt LT 2.2L LAP. It is awesome . Great sound, better response, looks fantastic - for sure more power in the 4000 rpm to 5000 rpm range. I have a question about the vacuum hose... I ran the hose that came with the kit from the intake to the engine as it was with the original intake. From what I can figure this hose is allowing excess pressure (hot air) from the engine back into the intake therefore causing warmer air to enter the throttle body - correct? The whole point of putting the cold air intake on is to pull nice cold air in right? If this vacuum hose is warming the air heading to the throttle body , it would be reducing my power abilities right?

My question is, can this hose be replaced with a "cap" on the intake side and a small filter on the pressure release side (not sure exactly what you call it). Any suggestions would be greatly appreciated. Is a different set up possible without throwing codes or violating emission laws?

1 more thing... should I be putting a better than stock MAF sensor on the intake - will this help in gaining more hp?

Cheers,
RD

PS - Next mod is a Cat Back exhaust - more air coming in - need to push more out

 

Yes you can.

 

Thanks haymaker.

Any ideas on where I could find a filter and cap? K&N don't list them.

 

Sorry hmc. Your answer "Yes you can" is not 100% clear to me - sorry - new car, new learning.

This is a vacuum hose - if I cap the intake side and filter the pressure release side, I loose the vacuum right? Sorry to be a pain, but there is no "dummy" book for this question.

Can you explain the details?

Thanks again for the help.

 

hey I've got the injen intake, same concept though. what I did was take the hose that runs between the intake and the motor and just ran the hose down so the intake still gets that air. you coudl cap it if you want. what I did was get a little breather filter from advanced auto.
K&N Filter
That top link is what one could look like. i got a different one, the APC one in the link below
APC Breather

 

Thanks... I think I will get the APC filter and plug the intake side. Appreciate the advise.

 

http://www.knfilters.com/vent.htm those are the crankcase vent filters from K&N and part numbers so you can ask your local parts store.

just an fyi a small bit of oil comes through the vent hose so the filter may become saturated and start dripping. thats why some people affix oil catch cans to the vent and run the other end of the catch can back to the intake pipe.

"a crankcase ventilation system exists to draw fresh air in from the air filter and expel the gases out the PCV valve into the intake manifold. In a non-turbo engine, the intake manifold is at a lower pressure than the crankcase, providing the suction to keep the ventilation system going."

thats from wikipedia. i dont know if it helps any.

 

Noted. Thank you.