OP
OP
PERRIN_Jeff
Member
- Joined
- Apr 19, 2018
- Threads
- 2
- Messages
- 31
- Reaction score
- 93
- Location
- Hillsboro, Oregon
- Vehicle(s)
- 2017 Civic Si Coupe
- Thread starter
- #151
The dyno graph is showing a lot of info and really the narrative I wrote needs to go with it (located on page 1). The short answer is yes it made more HP until the intercooler really was heat soaked. Where as before, it was always reading consistently lower HP.
This is what I had written:
Results
Does fixing this actually do anything? Absolutely! First and foremost, there was an increase in power! Since the ECU uses charge temps and intake temps to control torque (boost and other things) it actually added power! Just to give you some idea, we were seeing consistently 300WHP before this mod (OEM intercooler, 3” Catback with overpipe, and Ktuner). After the fix, the HP jumped up 20WHP, and we saw the air temp recovery time change much faster and our laser probe measured the same 150-160F on the sensor and manifold, while the ECU was seeing 130F. Only downside was now that the ECU was reading a more accurate temperatures, we were now seeing a fluctuation in power. See the below graph showing the grouping of the runs.
It is hard to see but before the mod the HP was consistently low (grouping within smaller circle). After the mod the HP jumped up and stayed up a bit longer, but eventually did fall down to about 300WHP. Keep in mind that these tests were done on our dyno where things are very consistent, and we don’t have fans that can replicate road speed. This tends to lean to slightly worse conditions where there isn’t the same cooling as found on the street. Our testing methods can get close to track like conditions as we can replicate the same higher coolant temps people see on the track, but don’t see on the road.
Sponsored
probably do this ACT surgery same time too and will definitely report back. 
