|07-09-2005, 02:11 AM||#1|
Join Date: Apr 2005
Location: Cosworth 2.5L GT40RVehicle:
2005 GDB STI
Help: Just installed Hydra on 05 STI: throttle feels unnatural
As noted in the message heading, I just finished installing a hydra on an 05 STI and everyhting seemed OK until I took the c ar out for a spin. The first thing I noticed was that the throtttle did not seem very responsive and lacked crispness. Almost like there was a 1 second lag before the throttle responded. I did make sure that I calibrated the throttle before testing and verrified that these settings were OK. In fact they were. The other thing I noticed is that when I shut the car off it seems to sputter a bit before turning off. Almost like an older carburetored car with a sticky throttle or choke.
What adjustments should I look into to fix my throttle response issue and the rough shutdown issue.
Any help would be greatly appreciated.
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Last edited by syoung0298; 07-09-2005 at 08:48 AM.
|07-09-2005, 12:56 PM||#4|
Join Date: Feb 2004
Location: 673 WHP Element ProComp Engine
According to your PM it sounds like you may have altered your map accidentally so I sent you the original to restore it.
The throttle does feel different with the Hydra vs. the OEM ecu due to the different acceleration rates. The OEM ecu has a very high acceleration rate while the Hydra has a linear throttle. The OEM ecu will give your more throttle than you give it while the Hydra will be smoother so it takes more pedal angle to feel the same as the OEM ecu due to the difference in acceleration rates. Most will only notice this right off of idle. I noticed yesterday on a car I tuned this was most pronounced and we found that his BOV was open during idle and until it snapped shut the throttle was dead for a second but unfortunately no way to adjust this BOV.
There are so many other adjustments that can be made, such as ignition timing which we send out about 3-4 degrees shy in some areas so that AFR can be verified and adjusted without fear of detonation. Once this is confirmed ignition timing can be increase. Also make sure you’ve turned on the “closed loop” function as this isn’t enabled since some customers rush the install and don’t install the WB.
Call during the business week and I can guide you in making adjustments or send me an email email@example.com
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