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I would be more focused on the curve than the actual WHP number.
The torque curve looks to be dropping from ~ 325 to ~290 between 5200-5700 RPM - that is pretty significant. It almost looks like the ECU is pulling timing. Did you fuel up at your normal gas station before your runs?
Wow, I just finished reading most threads on intakes for the F and now this. I think you guys hit it on the head. Heat soak seems to be a major issue with most if not all aftermarket intakes. Joe Z intake it is! OP like other members suggested reinstall stock intake and redyno in a few weeks. If similiar results conclude, which is very doubtful. Make sure that dyno machine is calibrated and up to date.
Wow, I just finished reading most threads on intakes for the F and now this. I think you guys hit it on the head. Heat soak seems to be a major issue with most if not all aftermarket intakes. Joe Z intake it is! OP like other members suggested reinstall stock intake and redyno in a few weeks. If similiar results conclude, which is very doubtful. Make sure that dyno machine is calibrated and up to date.
yeah definitely il reinstall the stock once my local dealer gets it in then il reset the ecu and drive it rough right after then get back on the dyno within a week and see the result. hope things work out.
IMHO, It's not the intake!!!! Go back and read posts #9 and #16. It sure looks like a timing issue to me. An Intake would never rob you of close to 60HP and cause a dip like that in the 5K range.
IMHO, It's not the intake!!!! Go back and read posts #9 and #16. It sure looks like a timing issue to me. An Intake would never rob you of close to 60HP and cause a dip like that in the 5K range.
Lou
I would agree with you, an intake will not heat soak enough to cause a drop in power like this especially on a couple dyno runs with the hood open and fans blowing on it.
Well its alright i like the stock intake design anyways, i swapped it out already and turned it over to reset the ecu, so il take it out tomorrow morning and drive it rough first thing.
Okay so Its been a couple days since I've swapped the intake and I also found that my battery connections were corroded and bad and changed the terminals so idk if that helped if any at all yall can decide. But here are the charts from a local meet, also note that people were saying the readings for the dyno were lower than average.
Okay so Its been a couple days since I've swapped the intake and I also found that my battery connections were corroded and bad and changed the terminals so idk if that helped if any at all yall can decide. But here are the charts from a local meet, also note that people were saying the readings for the dyno were lower than average.
Also I will go back to autobahn and dyno there again to see if this is accurate
Corroded battery terminals are very bad news. Ignition depends on getting solid voltage, and corroded terminals can make an otherwise good ignition go very bad at the worst time - when you are at maximum cylinder pressure. It's possible your plugs are lightly fouled too if you ran it in the previous condition for any length of time.
The other thing that could affect this is oil getting into the intake. Oil causes detonation because it is very low octane, and detonation will make the knock sensors go crazy, ECM pulls timing, and you get the ragged looking curve the first dyno shows.
How many miles are on the plugs, and how many miles are on the engine?
04-15-15, 09:07 AM
