AJV8(34s) Horsepower Questions / quest
#21
I have transplanted a 2009 4.2XFR SC engine in a 2003 4.2 SC (blown engine)
You have to use the original harness, reuse the original MAP sensor on the trhottle body (drill a hole and plug the MAP)
Reuse the original knock sensors
Use a PWM (duty cycle) piggy bag to change the cam status (2 status position advanced/retarded) depending on the RPM (easy way)
To set the right RPM you have to dyno the car two times ( advanced and retarded) to find the cross point of the two curves
This is the right RPM to switch the cams
this is my experience, the car is quite finished, VCM reset all the errors, but I have to go to jag dealer to test the different modules because my cloned VCM is not so efficent ( excetp error resetting and reading)
You have to use the original harness, reuse the original MAP sensor on the trhottle body (drill a hole and plug the MAP)
Reuse the original knock sensors
Use a PWM (duty cycle) piggy bag to change the cam status (2 status position advanced/retarded) depending on the RPM (easy way)
To set the right RPM you have to dyno the car two times ( advanced and retarded) to find the cross point of the two curves
This is the right RPM to switch the cams
this is my experience, the car is quite finished, VCM reset all the errors, but I have to go to jag dealer to test the different modules because my cloned VCM is not so efficent ( excetp error resetting and reading)
#22
Very good, thanks for posting.
What piggyback unit did you use?
Begs the question, do you have the dyno slips? It would be interesting to see what the power differences where in advanced/retarded position.
The cloned VCM should work as normal; otherwise there is something wrong with your device itself.
What piggyback unit did you use?
Begs the question, do you have the dyno slips? It would be interesting to see what the power differences where in advanced/retarded position.
The cloned VCM should work as normal; otherwise there is something wrong with your device itself.
#23
#24
#25
#27
There is one more problem that I didn't considerate
The high pressure sensor on the A/C tube is in 2009 A/C deleted and is included inside the A/C compressor directly (new generation)
My A/C refuses to work because the ECU feels this error......
Now
A) put a resistor on the ECU harness to simulate a working sensor?
B) sold a plug for the old resistor on the new piping ( I had to change the piping due to the new compressor type)
Except this the engine runs, the car runs and so on
I rebuild the torque convertor to support the HP increase that a new TS S/C will give
AVOS keep in touch
My engineer will send you what he has already done
The high pressure sensor on the A/C tube is in 2009 A/C deleted and is included inside the A/C compressor directly (new generation)
My A/C refuses to work because the ECU feels this error......
Now
A) put a resistor on the ECU harness to simulate a working sensor?
B) sold a plug for the old resistor on the new piping ( I had to change the piping due to the new compressor type)
Except this the engine runs, the car runs and so on
I rebuild the torque convertor to support the HP increase that a new TS S/C will give
AVOS keep in touch
My engineer will send you what he has already done
#28
#29
#30
#31
#32
I am very upset.....
Head gasket blown!!!!! F....OFF
Blocked thermostat valve, high pressure in the pipes, water leak....gasket blown......
I am very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very
UPSET!!!!
Head gasket blown!!!!! F....OFF
Blocked thermostat valve, high pressure in the pipes, water leak....gasket blown......
I am very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very
UPSET!!!!
#33
#34
#35
#36
#37
To all concerned about Jag performance here are some thoughts. Mind you, I started with car speed pre BL! Approximately 55yrs ago. The most 'missed' opportunity for speed has always been the stock exhaust, no matter the make! I'm talking about ALL production cars. Intake has always taken a (wrongful) priority with our attention. The exhaust is always a total compromise. Any engine with a power adder is choked to start with. As we increase what is being burned we must increase what is being exhausted. Or we won't get full benefit from what is being burned. This is not about size. It IS about flow. (And reduced pumping loses) I am a strong advocate of fast and lean burn, high compression engines. I just bought 2003.5 VDP and I'm attacking the electronics for mileage and the exhaust for flow (power) for starters. The stock X350 muffler chokes 16-18 hp, the rear mufflers waste some more, the cats don't flow well enough, and the exhaust manifolds are attrocious. I'm going to replace them all. And I love all you guys and gals.
#38
The following users liked this post:
GT42R (02-26-2013)
#39
okay, so I have an 03 s tpe r, its rated 390hp. The later s type r's are rated at 400hp. And the later XF sv8 supercharged version (with i think is the same engine) has 420hp. What is the real difference between these engines, to account for the increase in power?
I know they added more oil coolers later, but that doesnt increase power, where did those extra 10ponies come from? ecu?
I also know they added another intake track to the super charger, doubled the amount of air, 2 air flow sensors on the XF's, can this be adopted to an s type?
I guess the reason im asking is beacuse i'd like to track were they made more power, to apply it to my car ;-) before the mods begin. Any info would be greatly appreciated. thanks guus!
I know they added more oil coolers later, but that doesnt increase power, where did those extra 10ponies come from? ecu?
I also know they added another intake track to the super charger, doubled the amount of air, 2 air flow sensors on the XF's, can this be adopted to an s type?
I guess the reason im asking is beacuse i'd like to track were they made more power, to apply it to my car ;-) before the mods begin. Any info would be greatly appreciated. thanks guus!
#40