is pre-filter good to have?



does it really prevent water from gettin in the filter? wouldnt it restrict the flow of the air goin thru the filter?

pls help...


Thanks in advance!!!

 

wow ok so i may be digging up the past but yes it does... i have it on my and i live in wisconsin...Just avoid standing water...its only water resistant not proof

 

just avoid standing water... its okay for your intake to get splashed a bit not harm in that..

 

better to have an AEM bypass valve if you live in a wet area. Prefilters help more with the cleaning cycle of the filter than anything else cause all the debri doesn't get in the pleats in the filter.

 

They are great...




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On a four wheeler. No need to have it on a car that you don't use in sand/mud terrain all of its life.

 

I tested one when they first appeared on the market a number of years ago. Caused a significant amount of power loss. I don't remember the exact figure but it was somewhere around 7-10hp. Basically the gains you make with an intake you lose again.

The biggest thing manufacturers of the CAI don't want you to know is that it really doesn't make a detectable difference in power as compared to a short ram. They say it pulls air that's not hot from under the hood. When you are driving 20mph you've got 20mph of wind under there and the air really isn't much hotter!

In short get a SRI not a CAI and save some $$$ as well.

-Michael

 

The only thing with the SRI vs CAI is that the CAI can do runs more consistently then a SRI because after a few launches the engine gets hot and you initially pull hot air through the intake and lose some power where the CAI will pull in colder air upon consecutive launches

 

This is true, however in most cases by the time you have enough traction that you need the extra power the temps have dropped anyway. A phenolic spacer also helps in this area. I haven't had the time to look at designing one yet.

 

wow ok... so from the guy who has the hydroshield.......<-----me i can tell you there is no loss in power. It is very breathable and it resists water. Straight up. Not water proof just resistant. Its just a small insurance policy for 20bux by the bypass valve too if you like then you never have to worry and keep a clean filter. And cai destroys short ram. No offense but heat soak wastes so much power. In winter short is better more cold air to pull from but summer will rob you. Sorry bout the rant very long day

 

cool, Thanks for the replies.
didnt think anyone would answer it, lol!

 

Actually if u wrap your headers it will lower the temperature in the engine bay almost 100 degrees and also helps if you have the hood that is vented. Since our engines have a wide torque band it's good to take advantage of that, thats why I go for short ram and you can drive on water all you want. Anywho my friend has the aem bypass and it works good, I think it's about 50 bucks.

 

Very little degree changes in intake temperature make a huge difference on oxygen saturation for combustion. Even if a cold air intake, driving down the highway at 60mph, only has a few degree difference in intake air temp, this means that there is a significant difference in oxygen content for combustion.
Let alone heat soak in the summer. I used the upper end of my CAI for several months before adding the lower piece to complete the CAI and I can tell you that there is a significant difference all around. I have the Injen CAI.
But enough of that, there are countless threads about SRI vs CAI. I should've known better than to go off like that!

 

both good points.....i forgot about visuals