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Trust me Mark with the weather in the UK filters on the turbos is a no go from the start BUT whats the problem in a dry state/country, Ive always run filters direct on turbos in Mk4 supras no problem.
I've been at this for 15 years plus. Tried various things many moons ago. Always had drama with small rocks getting in the filter somehow. The location of the turbos doesn't help on bottom. The supra is on top under the hood. Right? I had a Evo running 9s with a filter only too but rush was on top do the motor under a hood.
I'm probably going to end up with just filters and socks, for the short term certainly. I don't like it but getting a set of intakes made that don't interfere with the tires and can maintain the top duct breaks my budget. I don't think anyone is making any sort of setup other than custom with the car in their care. I worked hard to get the top ducts sealed up as best I could and I believe it makes a difference in airflow. I wonder if moving the intake up a little ways alongside the engine but not all the way to the top would work? I'll get to this eventually but I certainly don't want to choke my engine with long pipes on the intake side!
Finally finished mine setup. 3.5" that is ovaled past the wheel (see it has hit once or twice) with k&n cone filter.
The intercooler top ducts are still installed. So to get extra air to the intercoolers I have 2 Naca ducts installed in the rear under tray that feed air up to the filters. Basically pumps air from under the car infront of the engine where it should still be cold up to the filters.
You can't see it in the pics but each duct has a stainless mesh to stop rocks or leaves or garbage going up to the filters.
So far - logs show my 3073s spooling to 1.4bar by 3450rpm in every gear. I'm pretty happy with the results.
you can get some decent size filters behind the i/c in that dead space. the biggest issue i had is maintenance. bumper, i/c, frame all have to be removed just clean the filters. and mine were filthy in just a few months. still searching for the best possible setup. i think tim941nyc has figured it out with his!
my filters were o big the frame actually had to be cut to get them in. also crushed the tubing at the suspension. just not the best way for me. for now its filters on the turbos with socks until i figure out what to do. i was thinking of maybe under the i/c in the bottom duct? or maybe in the driveline tunnel with some naca ducts
my filters were o big the frame actually had to be cut to get them in. also crushed the tubing at the suspension. just not the best way for me. for now its filters on the turbos with socks until i figure out what to do. i was thinking of maybe under the i/c in the bottom duct? or maybe in the driveline tunnel with some naca ducts
Well thats the biggest cone filter with 3" Intake that K&N do , they only say it will flow 364 hp although we all know it will support more, which brings me to my next question, why run a filter at all, if the pipework is run up into the IC area especially with the stock ducting in place what can possibly go down into the turbo, you could even duct it into the channeling to the IC to really suck cold air, any one massively worried could just put a section of nylon (I think you guys call them pantyhose)over the end, I never ran a filter on my Supra, there is NO filter made that would have not restricted it, yes it may wear the turbos quicker, who cares we dont intend to get 100K miles from them !!!
Well thats the biggest cone filter with 3" Intake that K&N do , they only say it will flow 364 hp although we all know it will support more, which brings me to my next question, why run a filter at all, if the pipework is run up into the IC area especially with the stock ducting in place what can possibly go down into the turbo, you could even duct it into the channeling to the IC to really suck cold air, any one massively worried could just put a section of nylon (I think you guys call them pantyhose)over the end, I never ran a filter on my Supra, there is NO filter made that would have not restricted it, yes it may wear the turbos quicker, who cares we dont intend to get 100K miles from them !!!
wear and debris. thats the only reason for use on a street car. no racers i know of run filters at the track. its just filthy back there when driving on the street and while we don't expect 100k of use I'm expecting 50k and doubtful the turbos would last that long without some form of filtration
the setup your supra has also has the intake out of the path of most debris high up in the aorstrem. the exact opposite of how the 996 is setup down low in the dirty air and debris kicked up from the road
wear and debris. thats the only reason for use on a street car. no racers i know of run filters at the track. its just filthy back there when driving on the street and while we don't expect 100k of use I'm expecting 50k and doubtful the turbos would last that long without some form of filtration
the setup your supra has also has the intake out of the path of most debris high up in the aorstrem. the exact opposite of how the 996 is setup down low in the dirty air and debris kicked up from the road
Yes but back in the space where the pipe would sit is like new in mine as I have factory ducting, theres no debris etc, for what we have spent a turbo refurb every 30K miles seems small change for max power
