1.1 bar on Digital Readout Stock X50?
#17
10-29-2010 | 08:50 AM
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Please educate me my friend ?
#18
10-29-2010 | 08:57 AM
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That is about an 18% drivetrain loss. Using that, your exhaust added 23 at the crank and the flash addeda about 83. In total, the engine is producing what, 521 at the crank? Very nice. I think that resolves a question I had previously about how guys like Fabby can claim 40HP gain on a X50 car with an exhaust. I am pretty sure he is claiming crank HP, not WHP.
If it is flashed, I wonder where it is HP-wise. Maybe after I get up to CT I will take it over to EPL for a dyno run.
If it is flashed, I wonder where it is HP-wise. Maybe after I get up to CT I will take it over to EPL for a dyno run.
#19
10-29-2010 | 09:16 AM
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My understanding is the loss of HP in a Tip is closer to 21%.
Still, that is a great result for just a flash and exhaust. If you have the stock DVs you can change those and add a BMC filter to the mix. When you put all together the cars performance is transformed.
Still, that is a great result for just a flash and exhaust. If you have the stock DVs you can change those and add a BMC filter to the mix. When you put all together the cars performance is transformed.
#21
10-29-2010 | 01:17 PM
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Did you buy the car new? Some tunes are not detectable. But you can...
-Check for the line/hose going into the passenger side of the y-pipe ahead of throttle body to be in place and not blocked or anything.
-Next you can check to see if the watsegate actuators and connections are looking correct. There are two nuts locking the actuator rod to the wastegate flap on the turbine housing. There should be approx 30mm from the back of the 1st nut towards the front of the car, to the end of the rod (threaded) towards the back of the car. An adjusted or tightened one should be no longer than 35mm.
-Check for the line/hose going into the passenger side of the y-pipe ahead of throttle body to be in place and not blocked or anything.
-Next you can check to see if the watsegate actuators and connections are looking correct. There are two nuts locking the actuator rod to the wastegate flap on the turbine housing. There should be approx 30mm from the back of the 1st nut towards the front of the car, to the end of the rod (threaded) towards the back of the car. An adjusted or tightened one should be no longer than 35mm.
Checking the threads on the actuators only tels part of the story.
Remember boost is controlled by the DME using the N75 valve. If you just wind the actuators in more you will not get more constant boost. The N75 valve will have to work harder to bring the actual boost level to the called for boost level. If the program has been written to run 1.0 bar boost then the DME ( flash programe) will try to set the boost using the N75 valve to 1.0 bar. However if you take a stock car say a running 0.7 bar and just wind the actuators ( like we used to do with Scoobs and Cosworths) you wont get anymore constant load boost. You will get a spike boost reading ( Over Boost) as the N75 cant react quickly enough to the sudden surge of boost, but as the valve takes control it will settle to whatever the DME program is set too.
This is not true however if.
1. The N75 valve is defective.
2. The waste gates them selves are seized ( been there).
3. There is a leak in the actuator pipes .
4. You have wound the actuator so far even the N75 valve has passed its duty cycle and can no longer control the boost to within the defined DME limits.
Frank
Last edited by Frank ( Sunnyside ); 10-29-2010 at 01:40 PM. Reason: spelling
#22
10-29-2010 | 02:19 PM
#'s 2-4 are what I was thinking. it is also good to know if the nuts have been messed with. The boost control valve or N75 though not as common can go bad as well. Usually it is a culprit for not making enough boost in my experience. Also tippy's hold more load/boost usually too.
It looks though like the car is most likely flashed. Good deal.
It looks though like the car is most likely flashed. Good deal.
#24
10-30-2010 | 04:53 AM
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if the n75 valve is defective ....you have basis boost (n75 only can this boost modulate to higher boost)
if you have overtighten wastegates you standard boost is higher and with n75 valve you cant go lower as mechanical boost is adjusted. Result at higher rpm this overtight wastgate can`t be opening enought with n75 valve and you get 1,1 bar...(make a test..disconnect your 75valve from motronic and you see basis boost)
maybe your wastegates are leaking....now it is time to check the system
if you have overtighten wastegates you standard boost is higher and with n75 valve you cant go lower as mechanical boost is adjusted. Result at higher rpm this overtight wastgate can`t be opening enought with n75 valve and you get 1,1 bar...(make a test..disconnect your 75valve from motronic and you see basis boost)
maybe your wastegates are leaking....now it is time to check the system
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