09-04-2012, 03:54 PM
I'd avoid a cone really.
In all my diagnostic runs out with customers cars an open filter under the bonnet is usually sucking in about 10degC more than ambient air temperature, or more in summer and slower driving!
In one case it was a 20degC day and the IAT (intake air temp) was up at 40degC, and it took about 10mins/5miles of driving to get it down to 30degC.
In contrast, the standard system intake temp is about 5degC above ambient at the very worst, and within 100 metres of driving it is usually at or 1degC above ambient air temp!
That 10-20degC can be costing you 5-10bhp on a stage 1 tuned car! The MAF sensor see's the higher air temp, and as such reads a lower MAF reading, thus not fuelling as much as it could at any given point!
Even if you direct cool air at the cone, you then lose out on the ram air effect of the standard intake system.
I'd invest some money in the exhaust as the gains there both improve turbo response (less laggy), improve the sound, and add overall power!
Dave
In all my diagnostic runs out with customers cars an open filter under the bonnet is usually sucking in about 10degC more than ambient air temperature, or more in summer and slower driving!
In one case it was a 20degC day and the IAT (intake air temp) was up at 40degC, and it took about 10mins/5miles of driving to get it down to 30degC.
In contrast, the standard system intake temp is about 5degC above ambient at the very worst, and within 100 metres of driving it is usually at or 1degC above ambient air temp!
That 10-20degC can be costing you 5-10bhp on a stage 1 tuned car! The MAF sensor see's the higher air temp, and as such reads a lower MAF reading, thus not fuelling as much as it could at any given point!
Even if you direct cool air at the cone, you then lose out on the ram air effect of the standard intake system.
I'd invest some money in the exhaust as the gains there both improve turbo response (less laggy), improve the sound, and add overall power!
Dave