UPDATE: Screens should arrive today. I'll get them up on the site today and they'll be ready to ship. It will be an option for the intake as well as a stand alone product for any of you who've already installed our intake system. These should also work with any other intake that uses 2.75" od tube.
Price will be $15.00 plus shipping.
I've had this installed for the last few weeks to see how it might affect fuel trims and last night I got back on the Dyno to see how it affected power.
From logging the car in HPTuners, I noted that idle trims were most affected by a margin of 5-7% while cruise and part throttle only varied 1-2%. The screen does straighten incoming air, but it also effectively reduces internal volume of the inlet tube. This causes the MAF to receive more airflow which richens the mixture. In my case, this was reflected by an increase in negative fuel trim numbers. This indicated the car was receiving more fuel than it wanted.
On the dyno, I found the difference in power to be negligible at best. Surprisingly with the screen installed, it actually picked up 1-2hp peak. I did have one run in which torque was up by 5, but looking at the boost curve it was due to the boost being +1psi, on that particular run, over the no screen runs. I'll post graphs later today.
All in all, the screen only seems to effect idle trims using the MPFab Intake. Depending on which side of 0% you're on, this may be a good option for those of you who are relying on mail-in flashes where the tuner states fuel trims are slightly out of spec on the positive side of 0(indicating the car wants more fuel). This could be installed in 5min, the car data logged, and that checked by the tuner to verify.
Would anyone be interested in me adding this as an option when purchasing an Intake? It would add maybe $15 bucks to the cost. It could also be installed in existing MPFab intakes you guys already own. Let me know what y'all think.
Sent from my XT1060 using Tapatalk
Price will be $15.00 plus shipping.
I've had this installed for the last few weeks to see how it might affect fuel trims and last night I got back on the Dyno to see how it affected power.
From logging the car in HPTuners, I noted that idle trims were most affected by a margin of 5-7% while cruise and part throttle only varied 1-2%. The screen does straighten incoming air, but it also effectively reduces internal volume of the inlet tube. This causes the MAF to receive more airflow which richens the mixture. In my case, this was reflected by an increase in negative fuel trim numbers. This indicated the car was receiving more fuel than it wanted.
On the dyno, I found the difference in power to be negligible at best. Surprisingly with the screen installed, it actually picked up 1-2hp peak. I did have one run in which torque was up by 5, but looking at the boost curve it was due to the boost being +1psi, on that particular run, over the no screen runs. I'll post graphs later today.
All in all, the screen only seems to effect idle trims using the MPFab Intake. Depending on which side of 0% you're on, this may be a good option for those of you who are relying on mail-in flashes where the tuner states fuel trims are slightly out of spec on the positive side of 0(indicating the car wants more fuel). This could be installed in 5min, the car data logged, and that checked by the tuner to verify.
Would anyone be interested in me adding this as an option when purchasing an Intake? It would add maybe $15 bucks to the cost. It could also be installed in existing MPFab intakes you guys already own. Let me know what y'all think.
Sent from my XT1060 using Tapatalk
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