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| Timmeh |
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Ahh Ok. My cars got Pacemakers and 2.5" exhaust recently done. Also a K&N.
Maybe the Oxy sensor was changed. |
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| spj |
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unclewoja wrote: In Fords, they delay the kickdown and require less vacuum (i.e more throttle) to kick down. It also in some conditions lowers the revs like cruising on the freeway. In econ your engine does about 200rpm less that in power.
Er...there's some basic physics that prevents lowering the revs! If you want to travel at a certain speed, your wheels have to have a certain rpm. To make the wheels rotate at that rpm the engine has to rotate at a certain speed. The only way the engine rpm could change while maintaining the same wheel rpm is if you change gears. |
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| bowsaw |
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The old autos, used a vacuum line to change, the new ones are controlled by the ECU, so vacuum shouldnt be a problem.
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| 4.9 EF Futura |
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bowsaw wrote: The old autos, used a vacuum line to change, the new ones are controlled by the ECU, so vacuum shouldnt be a problem.
Prolly meant more from a MAP perspective altho im unsure if load (vacuum vs RPM) is used by the gearbox's computer....
_________________ I promise..... I will never die. |
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| unclewoja |
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spj wrote: unclewoja wrote: In Fords, they delay the kickdown and require less vacuum (i.e more throttle) to kick down. It also in some conditions lowers the revs like cruising on the freeway. In econ your engine does about 200rpm less that in power. Er...there's some basic physics that prevents lowering the revs! If you want to travel at a certain speed, your wheels have to have a certain rpm. To make the wheels rotate at that rpm the engine has to rotate at a certain speed. The only way the engine rpm could change while maintaining the same wheel rpm is if you change gears. Actually, no. There is no direct link between the engine and the gearbox... only the torque converter. Just because the engine is doing 1800RPM does not mean that the input shaft of the transmission is doing 1800RPM. |
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| madmax |
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Well it couldn't be going faster, and if its going slower then the torque converter isn't locking up at high speed or its slipping.
My EL does the same revs at 100 in either power or ecconomy
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| bowsaw |
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4.9 EF Futura wrote: bowsaw wrote: The old autos, used a vacuum line to change, the new ones are controlled by the ECU, so vacuum shouldnt be a problem. Prolly meant more from a MAP perspective altho im unsure if load (vacuum vs RPM) is used by the gearbox's computer.... |
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| unclewoja |
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madmax wrote: Well it couldn't be going faster, and if its going slower then the torque converter isn't locking up at high speed or its slipping.
My EL does the same revs at 100 in either power or ecconomy An unlocked torque converter always slips. It is unavoidable. |
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| unclewoja |
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bowsaw wrote: 4.9 EF Futura wrote: bowsaw wrote: The old autos, used a vacuum line to change, the new ones are controlled by the ECU, so vacuum shouldnt be a problem. Prolly meant more from a MAP perspective altho im unsure if load (vacuum vs RPM) is used by the gearbox's computer.... All autos are governed by vacuum. Whether it be a physical vacuum line from the engine or an electrical signal from the ECU generated from vacuum gauge. MAP is brother to vacuum btw. If you've got 50kPa MAP, you've got 50kPa vacuum. 40kPa MAP, 60kPa vacuum (because we know that standard atmospheric pressure is about 100kPa) |
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| madmax |
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unclewoja wrote: madmax wrote: Well it couldn't be going faster, and if its going slower then the torque converter isn't locking up at high speed or its slipping. My EL does the same revs at 100 in either power or ecconomy An unlocked torque converter always slips. It is unavoidable. True but your saying 200rpm lower when cruising down the freeway, this is when it should be locked When unlocked at lower speeds the amount it slips would depend the condition of the torque convertor
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| 4.9 EF Futura |
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madmax wrote: unclewoja wrote: madmax wrote: Well it couldn't be going faster, and if its going slower then the torque converter isn't locking up at high speed or its slipping. My EL does the same revs at 100 in either power or ecconomy An unlocked torque converter always slips. It is unavoidable. True but your saying 200rpm lower when cruising down the freeway, this is when it should be locked When unlocked at lower speeds the amount it slips would depend the condition of the torque convertor Im not sure what you guys are debating but feel you may be misunderstanding each other.... The torque converter will lock up under certain conditions, in 3rd or 4th gear, above 60km/hr... and is more willing to do so in economy mode. It should be noted that the TCC is unlocked under throttle and also deceleration as the TCC is prone to slipping under these conditions so EEC unlocks the TCC to prevent wear. Also, the input and output of a converter can differntiate either way i.e. under acceleration the engine-side of the TC will rotate quicker than the trans-side of the TC... under deceleration, load is being transferred back onto the engine thus trans-side of TC is moving quicker than engine-side...
_________________ I promise..... I will never die. |
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