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0
votes
4answers
3k views

Why is the meanning of BHP and torque in bikes or cars?

BHP = Break horse power. It says that it is breaking horse power but it is generally relates with high pick up (your bikes reaches top speed in lesser time). So what does this actually mean?. Torque ...
0
votes
2answers
168 views

Torque and engine power [duplicate]

What is the relation between Torque and engine power? Just wanted to know how power is distributed to wheels in a car.
3
votes
1answer
33 views

What is the general rule, if one exists, for determining the difference between crank horsepower and wheel horsepower?

If a vehicle has a known crank or wheel horsepower rating, is there a method that can reasonably estimate what the other horsepower value should be? If so, what is that method? For example, if a ...
1
vote
1answer
51 views

Engine torque throughput curve is flat or wavy in low gears between 2000 and 4000 rpm

As the title says BMW's (93 E34 525i M50B25TU) engine misbehaves in low gears, namely in 1st and 2nd, most of the time when the engine is cold but sometimes even when it is properly warmed up. The ...
-1
votes
2answers
107 views

Does torque decrease mathematically?

There are 2 cars, car A and car B. Car B is 20% heavier than car A. We all know that this means that these 2 cars will have same power if car B at the same RPM (revolution) has 20% more Nm. Can the ...
6
votes
3answers
1k views

Aligning a castle nut with a torque spec to a cotter pin hole

The nuts at the knuckle on my outer tie rod ends are castle nuts, which are locked by cotter pins fed through holes in the studs. The nuts also have a torque spec (27.0±2.5 N∙m, in this case). If I ...
4
votes
1answer
139 views

What is the difference between an automatic torque wrench and a click wrench?

What is the difference between an automatic torque wrench and a click torque wrench? Right now the 1/2inch torque wrench I use on my Jeep is a really cheep one I bought on amazon and it clicks when ...
4
votes
3answers
1k views

Does accelerating faster worsen fuel efficiency?

I've often heard that accelerating harder makes for bad fuel efficiency, but have yet to be given a sound explanation of why. Naturally this makes me question this advice. Now obviously when you ...
3
votes
2answers
108 views

If I were to convert a gas powered automobile to an electric car, would a difference in specs possibly damage the car?

I would like to convert a Mazda Miata into an electric car, I plan to remove the engine and the gearbox, and have the car be a direct drive. The motor I intend to use has twice the torque of a ...
3
votes
1answer
149 views

Wheel re-torqueing, how is it done?

When putting wheels back on a car, you place them on and torque them to spec. Now, most if not all manufacturers say to re-torque them after 50 miles. What is the procedure for this? Do you just ...
6
votes
1answer
373 views

Do I need to lift my car up before adjusting lug nut torque?

I recently put new wheels on my car. I don't have off-street parking, much less a garage to work in, so I had the wheels installed by a mechanic. Since they were installed, they have been driven ...
2
votes
3answers
1k views

What is the torque and sequence for a '99 Jetta Oil Pan?

I have a '99 Jetta TDI (diesel) with a cracked oil pan. I'm looking for the sequence of tightening the bolts and the torque needed for each bolt. I've been doing to google-fu but can't seem to find ...
4
votes
2answers
440 views

engine underpowered in idle - what can be done to improve a diesel engine power at low RPM just a bit?

There is an engine which is a bit underpowered when idling, it can not even keep the car moving on a flat road when in gear and idling at 700..800 RPM - see link. What can be done to improve its ...
8
votes
2answers
729 views

Should a mechanical “click” Torque Wrench be set to zero when not in use?

I have a standard click torque wrench. I was told I should set it to zero when not using it in order to keep the accuracy high. Is this true? Secondly, I have not been doing this since I purchased ...