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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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Any negative affects from oiled air filter installation?Views : 776 Replies : 11Users Viewing This Thread : |
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Oct 31st, 2021, 12:34 | #1 |
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Any negative affects from oiled air filter installation?
Hi Everyone Happy Sunday,
As the title states i am curious about anyone reporting issues as a result of installing panel filters? Newer vehicles definitely suffer from issues as the oil gets onto sensors like the maf further down the system long term. Long time since i have ran injection and such fancies haha Any experience appreciated Mick
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Oct 31st, 2021, 12:48 | #2 |
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The general consensus on here is that 940 Turbo's perform best with the standard filter.
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Oct 31st, 2021, 13:06 | #3 | |
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Do people modify the airboxes to increase intake? I have heard there is a sneaky cold air feed on the wing behind it.
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Oct 31st, 2021, 14:10 | #4 | |
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https://www.ebay.co.uk/itm/392259052853 That may or may not be the right one for your car, there are two different sizes available, that one fits my 760 which i think uses the same size as 940T models. The cold air feed is there to be used in conjunction with the hot air feed from the exhaust manifold and is designed to give a constant air intake temperature. However the wax-stat that operates the diverter valve in the air intake usually fails in the hot position so you end up drawing in very hot air. There is a thread somewhere about these with some instructions about renewing the wax-stat but they're not cheap, they're fiddly to change and will eventually fail again. If i remember the name of the thread i'll find it and post a link. I do know that the hot air feed from the exhaust carries a lot of airborne dirt/oil from the engine bay, hot air is moister than cold air so transmits the dirt more easily. It was turning my air filter black within a few months so i removed the hot air feed from the exhaust as it was also causing flooding and overheating of the fuel rails and inlet manifold.
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Oct 31st, 2021, 14:16 | #5 |
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This debate has been done to death on some of the biggest car forums in the world . Buy any Ferrari or porsche . Open the engine air filter box and see what inside. Chances are its a dry paper filter.
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Oct 31st, 2021, 14:25 | #6 | |
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Oct 31st, 2021, 14:30 | #7 | |
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Technically these uprated style filters do filter less than paper which is why they can flow a little more. I care not for what the sale speel has to say about it as they filter well enough for me regardless haha
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Oct 31st, 2021, 15:35 | #8 |
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The standard 940 turbo Air box is cold air feed as standard so a standard filter is the best way to go, I replace mine on every service even if it has only done 3k miles as you can get them for about £4 from Euro Car Parts. There is no warm air feed etc in a turbo 940 air filter housing, I've gutted the excess plastic and foam padding from inside mine to give a more pronounced wastegate noise when I let off the throttle but that's about all you need for a mildly tuned 940.
Save your money and go through and service it properly as it will no doubt be leaking oil, the PCV probably won't have been cleaned out properly for a long time and if you want a decent mod then get rid of the useless camshaft it has as standard and go for an A, V, VX3, H or K cam or if you want to go more serious then an IPD turbo cam, I have the IPD cam in mine and it seriously wakes up the engine. Hopefully that advice is of use |
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Oct 31st, 2021, 15:39 | #9 | |
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Nov 1st, 2021, 12:56 | #10 |
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I run an oiled cone K&N in the 360 with B230FT, its extremely loud on the dump and you get alot of turbo noises. The younger lads love it, but I was going for the sleeper scene.
Other than that it runs fine, I havn't oiled it since I got it, seems dry enough and doesn't do alot of miles. |
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