And of course there’s the obligatory dusting of your engine - those pod filters are like a sieve. You’ll accelerate the wear in the engine using one.
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And of course there’s the obligatory dusting of your engine - those pod filters are like a sieve. You’ll accelerate the wear in the engine using one.
Drove the car yesterday without the horn on the front of the air box. Not really sure if it went better but certainly wasn’t worse.
I have the flapper style air flow meter, I zip tied the flap in the open position and ran it on LPG with the air filter in place. The wideband O2 sensor indicated that with it open the mixture leaned right out to 17.5:1 or over (from 15:1) and the idle dropped 500rpm.
I have a BLOS LPG mixer between the air flow meter and the throttle body. Tuned the mixture and idle to suit the flap all the way open and it ran better (and sounded better). This, to me, suggests that the flap is causing a large restriction. I can’t leave the flap open as I start the car on petrol then switch to LPG.
Many years ago I saw a device called a “Flap Opener” for sale from a company in England. Maybe if I get one of them and run the car with the flap fully open when running LPG, it may help with the restriction caused by the flap. Does anyone know where I could source one of the flap openers?
Would like to get the flap issue sorted before I do anything with a pod filter.
I have cut the trumpet horn of the front of at least 4 air boxes now for either LPG conversions or secondary battery installations and can't say I have noticed a difference in anything except maybe perceptible noise, which to some people makes them feel like they have more speed and power.
In general, I don't think it makes a difference on a higher milage 30–50-year-old car with a half clapped out drive train etc....but every little bit counts I suppose?
Us oldies need to keep our pipes clear..Quote:
Originally Posted by jsp
If it is a 1988 with a flapper then it came with a 3.5 litre not a 3.9. maybe the 3.9 was swapped later.Quote:
Has anyone removed the air filter housing and air filter and replaced it with a K&N pod filter on a 1988 RRC 3.9 litre?
3.9s all had 14CUX with airflow meter MAF.
Regards PhilipA
I put the 3.9 in a few years ago. And still has the flapper AFM.