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Pud237 · 04-03-2008

Originally Posted by mclovin159

I have the mesh guard fitted after the filter before the maf. I cannot see why shortening the pipes would destroy the MAF???

Think you misunderstood, having the MAF so close to the filter wouldn't destroy it but its a bit more likely that the MAF will not read as spot on. But if its idling better that it was before then this can't be the case.

I think the theory behind keeping the MAF a good distance away from the filter is so that the airflow will even out, as the MAF can only detect what is flowing past the little wire in the sensor unit itself (by measuring the voltage needed to keep the wire at a constant temperature), the ECU then makes an assumption on how much air has flowed past by assuming whats flowed over the wire on the MAF is an average for the whole cross-section of the intake pipe. If turbulent air was flowing across the wire on the MAF, then the ECU might think the engine is getting more or less air than it is..

But in your case, it looks like this hasn't happened and everything is working as it should

04-03-2008	#26 (Post Link)
Pud237 AO Platinum Member Join Date: Apr 2006 Location: North Yorkshire Posts: 13,527 Member car: Alfa 156	Re: fitted induction kit today... woo hoo Originally Posted by mclovin159 I have the mesh guard fitted after the filter before the maf. I cannot see why shortening the pipes would destroy the MAF??? Think you misunderstood, having the MAF so close to the filter wouldn't destroy it but its a bit more likely that the MAF will not read as spot on. But if its idling better that it was before then this can't be the case. I think the theory behind keeping the MAF a good distance away from the filter is so that the airflow will even out, as the MAF can only detect what is flowing past the little wire in the sensor unit itself (by measuring the voltage needed to keep the wire at a constant temperature), the ECU then makes an assumption on how much air has flowed past by assuming whats flowed over the wire on the MAF is an average for the whole cross-section of the intake pipe. If turbulent air was flowing across the wire on the MAF, then the ECU might think the engine is getting more or less air than it is.. But in your case, it looks like this hasn't happened and everything is working as it should Back on the road: Alfa 156 3.0 24v V6, Silver with red leather, Q2 diff, GTA Teledials, headlights & inlet manifold, AutoDelta carbon intake, decat pipe and SuperSprint rear box, FK coilovers, Dastek Unichip - my 245bhp beast! Gone but not forgotten: Alfa 156 2.4 JTD Veloce, Vela Blu, Angel 'mad map' & BMC CDA, Ferodo DS2500s - the fastest tractor in town! AO 'Bratpacker' No 5.