I have a NA Exige with a Lotus stage 1 exhaust and a remapped ECU to lower the cam shift point. The remapped ECU is worth every penny as it makes the car much more progressive on the track. I am running standard airfilter and wonder if there is any point adding a TRD airfilter? I struggle to see how the breathing is restricted on a 190 NA Exige. Seeing that Lotus only upgraded the filter for the 240, which needs a lot more air and is forced induction, I would expect that the standard box is fine.
They only cost £80 so it may just be worth a go; anyone with any real or measured experiences of fitting one of these?
Alledgedly on high power cars they do liberate a tiny bit more power…
The only thing you’d notice is more induction noise on yours…
You may want to keep hold of your standard one for refitting when you grow tired of making a racket
That’s what I think, waste of money. However, when CN did my ECU upgrade the strongly encouraged the filter upgrade. It make no sense to me, I think I will save my money.
I tdi power tested my n/a 111r for elise trophy regs with both the std air box and trd air box and both were exactly the same power output. you could of just about overlay both plots they were that close.
The trd airbox only makes good on the higher power cars and is fit for 300hp easily.
Thanks, that is exactly what I expected, it is good to have the view supported by a test.
I once spoke with a well respected k series expert. He had a Lotus group testing air filters on his rollers. He determined, right at the start, the for a standard k series no air filter and the std filter gave the same results. Therefore, no aftermarket device could improve matters. They still did lots of tests and picked the “best” which he said was in the run to run variability of the rollers.
