Air Cleaner
Posted: 05 Dec 2011 12:27
Qoute : Cant seem to start new topic so I will use this one. Can somebody help. After our day with Grootseun and his team I took the Patrol to an exhaust place to see if it had a leak at the Manifold. And yes it had two cracks, which was welded and fixed. Now while there the friendly chap told me that he thought the the aircleaner for the 4.8, which is still standard is too small and I should find one that will let more air in. This is my question, what is the best at a budget price? Then he also said that manifolds do crack due to age. The vehicle has 195 000 kms on. Now what can one do again at budget as one could have the whole thing redone at a huge price and is that worth it. As I rate your technical knowledge on this site as superior , can I sak for help. Nico
Nico , some might argue with me but more isnt always better , we used to perform various mods on our aircleaners on our racecars for more airflow etc etc
In the end of the day your engine can only use a set amount of air and this is determned by factors such as engine size , cylinder head flow characteristics and exhaust flow characteristics , if it is true that the 4.8 has a restrictive air filter then yes fititng something with better flow would be beneficial but you must be carefull - almost all of the higher flowing filters are cotton and oil type filters ( K&N , simota etc ) and these are not really the best for your off road vehicle unless you fit aditional foam and oil outer filters or so called prefilters
Id much rather invest my time and money into CAI - or cold air induction which alowd colder air to be force fed into the filter - in 4x4 apps like the patrol fitting a snorkel would bet you cleaner and colder air
Personally ive gone the route of experimenting with a higher flow rate filter and CAI on my Hardbody , i fabbed up everything myself as i wanted to be sure of the benefits before forking out the money for the imported kit - the benefit i can hardy see in the fuel bill , motor does revs a bit more freely and sounds like something that belongs to 19year old boy racer and i lost my bottom ebd torque because of the bigger filter the venturi effect in the origanal fliter design that icreased air velocity is no longer so i now have less bottom end
As for the exhaust , as long as you have a decent builder let hom set you up with a proper branch , you wont notice a lot of hp more as the rest is still standard but it wont crack as easilly in the mild steel version as teh cast OE one does
Nico , some might argue with me but more isnt always better , we used to perform various mods on our aircleaners on our racecars for more airflow etc etc
In the end of the day your engine can only use a set amount of air and this is determned by factors such as engine size , cylinder head flow characteristics and exhaust flow characteristics , if it is true that the 4.8 has a restrictive air filter then yes fititng something with better flow would be beneficial but you must be carefull - almost all of the higher flowing filters are cotton and oil type filters ( K&N , simota etc ) and these are not really the best for your off road vehicle unless you fit aditional foam and oil outer filters or so called prefilters
Id much rather invest my time and money into CAI - or cold air induction which alowd colder air to be force fed into the filter - in 4x4 apps like the patrol fitting a snorkel would bet you cleaner and colder air
Personally ive gone the route of experimenting with a higher flow rate filter and CAI on my Hardbody , i fabbed up everything myself as i wanted to be sure of the benefits before forking out the money for the imported kit - the benefit i can hardy see in the fuel bill , motor does revs a bit more freely and sounds like something that belongs to 19year old boy racer and i lost my bottom ebd torque because of the bigger filter the venturi effect in the origanal fliter design that icreased air velocity is no longer so i now have less bottom end
As for the exhaust , as long as you have a decent builder let hom set you up with a proper branch , you wont notice a lot of hp more as the rest is still standard but it wont crack as easilly in the mild steel version as teh cast OE one does
