Pulley only
#81
Another example the SVR at 575PS, there is a ring taxi and I know the owner (Dale Lomas) and he has around 14,000 miles which are pure track miles on his SVR and the only issue was a cracked radiator, no doubt from a stone from track use, zero engine, trans or SC issues and he drives it flat out all the time.
I agree with your opinion that track use, particularly frequent and even exclusive track use will stress an engine and other parts of the F Type, or any car.
I am aware that we can all sometimes use exaggeration to make a point.
My point is 'ring raxi duty even in a skilled driver's hands constitutes high loading,but isn't however anywhere even remotely close to "flat out all the time"
A lap might be 8:40 due to traffic and a good proportion of that time will either braking or on less than full throttle.
My definition of flat out use would be reserved for engine dyno use at full load for significant time, not brief flat out bursts spread out over 8 minute laps with recovey time after each lap.
A closer comparison with flat out use might be endurance race such as Le Mans 24 hour.
#82
Power is rate of doing work.
Usual easy to understand explanation is
a lower powered engine (with appropriate gearing - which multiplies engine torque) will lift a heavy weight to a certain height.
An engine with more power will lift the same weight to the same height in a shorter time
#83
Is this statement not an oversimplification ?
Peak cylinder pressure whether calculated peak bmep or peak imep will correspond to peak torque however that isn't the only contributing factor to 'engine stress. My understanding is engine rpm will obviously be related to piston speed and more importantly piston / reciprocating component acceleration which can be a significant contributing factor of 'engine stress'
Peak cylinder pressure whether calculated peak bmep or peak imep will correspond to peak torque however that isn't the only contributing factor to 'engine stress. My understanding is engine rpm will obviously be related to piston speed and more importantly piston / reciprocating component acceleration which can be a significant contributing factor of 'engine stress'
#84
Agreed and power and work aren't the same.
Power is rate of doing work.
Usual easy to understand explanation is
a lower powered engine (with appropriate gearing - which multiplies engine torque) will lift a heavy weight to a certain height.
An engine with more power will lift the same weight to the same height in a shorter time
Power is rate of doing work.
Usual easy to understand explanation is
a lower powered engine (with appropriate gearing - which multiplies engine torque) will lift a heavy weight to a certain height.
An engine with more power will lift the same weight to the same height in a shorter time
#86
I have never stated the device increases power.
I think the device is most likely garbage and a scam. My opinion of the level of knowledge of fans or promoters of the device is similarly uncomplementary.
#87
Back on topic... does anyone have a link to an upper pulley install video that shows actual pulley removal and installation? The popular RR/Jag Youtube video only removes the intake T to identify the pulley, it does not show actual on/off.
Second, got a link to the pulley remover you used? I have a lot of different sizes of pulley pullers, but I have read the job needs a non-standard puller to fit in the usable space.
Last edited by V8S; 07-28-2018 at 03:05 PM.
#88
I have data captures for throttle position sensor, from a few dozen vehicles to prove this. Do you actually need to see them or are you going to insist that there's "complex circuitry" in the hall effect sensor.
A throttle pedal that "has delay" as you suggest is a defective throttle pedal and would IMMEDIATELY be replaced by any technician working on the car.
Those gadgets reduce the electrical travel of the pedal, making it more or less touchy. Period. this is what makes the average person think the car is faster. They are 100% wrong about that. However that doesn't stop them from liking it. They can LIKE or THINK whatever they want, but it does not change reality, and I'll happily take their money from them selling these things, if they are so determined to LIKE it. LOL
Last edited by 15FTypeR; 07-28-2018 at 03:07 PM.
#89
Except that there is ZERO throttle lag FROM THE PEDAL, (and I know from past threads this is the incorrect point you are trying to make), which is why the pedal boosters only work on perception, not actual performance.
I have data captures for throttle position sensor, from a few dozen vehicles to prove this. Do you actually need to see them or are you going to insist that there's "complex circuitry" in the hall effect sensor.
A throttle pedal that "has delay" as you suggest is a defective throttle pedal and would IMMEDIATELY be replaced by any technician working on the car.
Those gadgets reduce the electrical travel of the pedal, making it more or less touchy. Period. this is what makes the average person think the car is faster. They are 100% wrong about that. However that doesn't stop them from liking it. They can LIKE or THINK whatever they want, but it does not change reality, and I'll happily take their money from them selling these things, if they are so determined to LIKE it. LOL
I have data captures for throttle position sensor, from a few dozen vehicles to prove this. Do you actually need to see them or are you going to insist that there's "complex circuitry" in the hall effect sensor.
A throttle pedal that "has delay" as you suggest is a defective throttle pedal and would IMMEDIATELY be replaced by any technician working on the car.
Those gadgets reduce the electrical travel of the pedal, making it more or less touchy. Period. this is what makes the average person think the car is faster. They are 100% wrong about that. However that doesn't stop them from liking it. They can LIKE or THINK whatever they want, but it does not change reality, and I'll happily take their money from them selling these things, if they are so determined to LIKE it. LOL
Back on topic, has anyone here done their own upper pulley? Video? I don't mind doing it without a go by since it's straight forward minus working room, and so many popular cars do the same thing, but a car-specific video is always better.
Last edited by V8S; 07-28-2018 at 03:40 PM.
#90
I will continue to harp on this every time you hint at fake "throttle pedal delay" needing to be "fixed" by snakeoil, so if you're working for sprintbooster, submit your resignation.
Last edited by 15FTypeR; 07-28-2018 at 04:16 PM.
#91
Making the throttle pedal itself more sensitive will not. All the sprint booster can do is make the pedal appear to be pushed further down that it really is. The ECM will still over ride whatever input it gets using its inbuilt maps which is why it is the maps you have to change.
#94
[QUOTE=V8S;1937609]
I didn't say I don't like it genius.
I said it doesn't do what YOU claim it does. You really need to try actually reading what all the informed people are saying.
I said it doesn't do what YOU claim it does. You really need to try actually reading what all the informed people are saying.
#96
I realize that, thanks. I don't want more peak power or peak torque, I want to raise and flatten the torque curve. I'm also not interested in alpha-testing a tune that cannot post a legible before and after dyno, and does not warranty their end users.
Last edited by V8S; 07-28-2018 at 06:17 PM.
#97
To know whether that will work, we would have to know if the stock tune will limit boost only at the peak or will it limit it everywhere. If the first, then changing just the pulley without any tune should achieve that goal, I would think.
#98
90% of the benefit, 0% of the risk, 10% of the cost.
Last edited by V8S; 07-28-2018 at 06:57 PM.
#99
There are various pulley websites that say a SC pulley on the stock tune adds 30-40 ftlbs under peak. That's probably all the tune + pulley add under peak boost, anyway. I don't want more peak torque as it is destructive and rarely used. Regulated peak boost from a faster pulley is ideal IMO, it's the most usable power addition without design stress exceedance.
90% of the benefit, 0% of the risk, 10% of the cost.
90% of the benefit, 0% of the risk, 10% of the cost.
#100
There are various pulley websites that say a SC pulley on the stock tune adds 30-40 ftlbs under peak. That's probably all the tune + pulley add under peak boost, anyway. I don't want more peak torque as it is destructive and rarely used. Regulated peak boost from a faster pulley is ideal IMO, it's the most usable power addition without design stress exceedance.
90% of the benefit, 0% of the risk, 10% of the cost.
90% of the benefit, 0% of the risk, 10% of the cost.