Hey guys I been noticing a lot of heat soak with my ztube and pop charger 85°f dash readout the intake air temp is at about 150°f to 160°f after a few minutes. I made a cardboard heat shield of sorts and brought that number down to 120°f to 130 °f. It was a quick build but now I'm thinking of closing off filter more and running tubing (mostlikly dryer vent tube ) to get more cold air. I'm thinking of using a 3in marine inline fan to help pull air into the box I make around the filter. The inline fan I'm looking is rated at 270cfm would that be enough air coming in or will I be choking out the motor. Also I will be using that plastic scoop on top of radiator that the stock box uses. Any tips to make this work I wanna lower stand still intake temps but still get full use of that extra air coming in from popcharger.

 

Some people extend the pop charger out to a bumper opening, or add an air diverter from the bumper area. Enclosing the air intake is very important after all from heat from the engine.

 

Yea I wanna box it in and have tubes deliver air. Idk how big of a fan will make a difference and how big of inlet I should have. Like is 270cfm enough to feed filter plus whatever is coming in for air at speed. I don't wanna choke my motor out

 

I don’t think a fan is necessary, IAT will increase at 0 mph, but should otherwise be ambient temp.

 

Displacement in cubic inches X rpm, divided by 3456, then multiplied by the volumetric efficiency of the motor which iirc from some of the early development papers released for the VQ35DE were ABOVE 100% at midrange rpm and ended at roughly 100% at redline.

So convert to cubic inch

3.5 x 61 = 213.5

213.5 x 7000 (redline for rev up engine) = 1,494,500

1494500 / 3456 = 432.4 which is the CFM required at 100% volumetric efficiency, normal you would multiply this number by the VE of the engine but the VQ35DE engine as stated previously sits at nearly 100% VE at redline so it's safe to use this 432 CFM as the air requirement for the engine. Plus you want a little extra headroom to account for variations in the fan equipment in case they aren't truthful about how many CFM the fan was pumping. I'd say add an extra 5-10% headroom.

Now this is the actual requirement for the engine, you're just adding supplementary air to what's already being naturally drawn in so it could be significantly less, however I personally would scrap the engine idea because you're adding extra systems and complexity to the car and you really only need to form up a box that seals off engine air.

Either make one using CAD (Cardboard Assisted Design), or go buy a stock airbox and modify the velocity stack, or try to find a rev-up airbox.