Initial comparison Only
Gen 2 with approx 8mths SRI and heatsheild installed .
Today I reinstalled OEM air box with KN filter and cut two 65mm holes into walls of box and covered these holes with marine grade black plastic louvered vents. These vents face downward so as to (1) keep out water ingress .(2) direct air into Box.(3)to keep box as close to Std looking as possible.
Dashawk used for data.
Sri with aluminium inlet (heat transfer from engine bay) not very effective.
Constant IAT,s where approx between 6 to 8 Deg F above Ambient when travelling.
In slow traffic IAT would climb substantially.
Aluminium MAF inlet was approx 1.5mm larger than OEM.?????
LTFT where constantly positive IE @ 100 klm hr + 4.9 on average.
@ 60 Klm hr + 7.5 "" """"""""".
@ Idle + 12.0 " " .
Today OEM box with rubber inlet( greater thermal qualities) and std MAF housing.
LTFT @ 100 klm hr - 5.5
@ 60 Klm hr - 3.9
@ Idle - 0.0
IAT constantly 3 deg F above ambient.
Would take some time in traffic to rise.
Initial conclusion is that SRI can cause increase in fuel useage and IAT.s to be higher. Oversise MAF housing does lead to ECU seeing information outside of std parameters.
Today also a vast difference in soot around tailpipe tips and smell in garage from exhaust.
Will post update information with data once ECU has settled and some klms on OEM with vents .
Also cleaned MAF sensor b4 reinstall.
This is not a bagging of SRI.s Just my endevours to reach best option re mods.