The difference between sucking & blowing! - Page 11 - Renault Forums :: Independent Renault forum

View Poll Results: In your opinion/experience does air filter choice affect the turbo's lifespan?
Absolutely, more power through greater efficiency - can only be a good thing. 11 64.71%
Keep it standard, that way its the manufacturer's responsibility if it goes bang. 3 17.65%
Don't know/care one way or another. 3 17.65%
Voters: 17. You may not vote on this poll

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post #51 of 71 (permalink) Old 10th July 2008
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i think ill add my 2p worth

less restrictive air filter = more air available to turbo .
more air available to turbo = turbo can do its job easier
turbo can do its job easier = more power and less wear (albeit minute)
more power and less wear = bigger grin Interested in trackdays??
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post #52 of 71 (permalink) Old 10th July 2008
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Originally Posted by owenfackrell View Post
My understanding of compressers is that if you restrict the air flow (ie put your hand over the intake) then it will still spin but just not compress.
That's true of a mechanically driven compressor
post #53 of 71 (permalink) Old 10th July 2008
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It's no coincidence that in F1 terms,engines had a minimal air filter and a minimal exhaust system.

If the exhaust gases can escape with less restriction,then the more capable they are of spinning the turbo .

If the air it displaces is free flowing,then the easier the turbo can spin.

I don't think the type of air filter used is the most important factor in turbo life,but it can't hurt having a free flowing air supply to it.

I'd rather push my Alfa than drive a BMW....
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post #54 of 71 (permalink) Old 10th July 2008
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I could realy talk about this all day but will try and make it a little smaller.

Turbo car: Can't beat the hit of power when on boost, Free flow air filter will help but only with other supporting mods. I.E exhaust from turbo back, uprated fuel pump, larger intercooler and cooler runing plugs.

More dense air works best (All turbo rally cars are tested early in the morning when the air is best)

No backpressure needed for a turbo car, get the gases out shortest and quickest route possible.

N/A car: air goes in at atmospheric pressure not sucked in.
free flow filter will make the smallest amount of differance.

In order for it to make a differance that is noticable the whole system needs upgrading. larger throttle body , ported and polished head, high lift camshaft, 4 branch manifold and a decent exhaust system (remembering back pressure required on a n/a car)

I also would fit fuel pressure reg and remapped ecu to except the higher fuel pressure and more air flow.

There you go thats my imput simplified hope this helps a little.
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post #55 of 71 (permalink) Old 10th July 2008
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I voted for Absolutely, more power through greater efficiency - can only be a good thing. Not that I understand fully what you guy's are going on about, but in theory I guess that greater efficiency can, if used correctly used can and will create improved economy.
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