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(on a bike). how many people run their mk1's without filter? and no filter is obviously ZERO restriction. why pay 40-120 quid for k&n induction stuff..........no dirt would mean little issue.....grimy water means absolutely no chance! 
..bobbyh wrote:how do those bike engines survive? the guy with the bikes said, the crap just gets incinerated? he's an engineer with a 12k classic Norton, not some muppet.
per second at high engine rpm.(eg on track) you can hear the grit and stones from the car in front hitting your car. It sounds bad... That's on a road that isn't particularly dirty either. 
good filters really arent that restrictive, i seriously doubt youll ever find more than 1% from not running one, if that. its not worth the risk. even F1 cars run air filters. paper (and synthetic equivalents) is still the best medium for pure surface area and the smallest particle filtration if anything can find its way into the engine, you can bet it will if you give it the chance to. the bolt destroyed the engine btw, about £15k of damage.Jim-SR wrote:If anything can find its way into the engine, you can bet it will if you give it the chance to.
Luckily your losses on a MK1 are limited to about £150. 
If you're going for a big power, you don't start with a 120bhp 1.6£17 which had all the pipes and stainless steel fittings. I just used the filter though and bolted it straight onto my pipe in my boot. It fits perfectly and is a lot better for my mpg MR2 motors are designed to do a couple of hundred k. Formula 1 motors would run without a filter if a) the induction force wasn't so high for a motor running 18k rpm/200 mph and b) if they had more than 7 engines per season.....SuperRedMR2 wrote:If you are feeling a bit strapped for cash, I bought a Corrola GTI RamAir filter off of ebay for a cool
£20 from temple tuning .....WeirdNeville wrote:Jim-SR wrote:If anything can find its way into the engine, you can bet it will if you give it the chance to.
I'd say it's just not worth it.
THese engines are fantastically revvy and reliable with a stock air filter on, I see no need to mess with a good design.
blowing an engine on an MR2 is a major PITA. its not like you can just drop the slam panel and the radiator and slide the whole thing out the front like you can in front engined cars. its just not worth running without a filter for the zero/minimal gain. i doubt youd even be able to feel it, the noise and the knowledge that the filter isnt there will give a placebo effect and thats it. its the same with induction kits, usually they lose torque unless the stock airbox setup is very restrictive to begin with.