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10
votes
5answers
218 views
+50

What is the difference between torque and horsepower?

A very basic question - what is the difference between torque and horsepower? Its all over Google, but I am really confused and can't get any satisfactory answers. I'll tell you my confusion: Torque ...
4
votes
2answers
66 views

Can I use any portable powerbank to jump start a car

Say I have some ordinary portable powerbanks I use for my smartphone, I wonder if all of them are able to jump start a car with flat battery as long as I have a correct connector (e.g. clamp). Or ...
5
votes
2answers
55 views

How can head port volume affect the power curve of an engine?

Recently I learned that even more things other than the ones already mentioned here can effect the power curve that is produced by the engine. Here is an example of one. I understand that there are ...
9
votes
1answer
114 views

How does intake manifold runner length effect the power curve of a car?

Recently I learned that a number of things such as the cam profile, compression ratio and the intake manifold runner length and volume can all effect the power curve of the engine. Here is an ...
2
votes
0answers
18 views

What actually is brake horsepower (BHP)? [duplicate]

I know that BHP is the measure of power of an engine. I realised that I have no idea how the number (for example 540 BHP) relates to the engine itself. Does 1 HP mean one rotation of the crankshaft ...
22
votes
6answers
1k views

When is a cold air intake system beneficial?

Cold air intake must be one of the popular mods there is, and one subject to the most controversy as well. Manufacturers of such systems advertise 5-20 HP gains, yet there are claims that this mod ...
6
votes
1answer
175 views

What should one do to reduce the HP lost at the wheels on an automatic transmission?

I have a 1990 Toyota Supra Turbo 4 speed auto. I've done some research about automatic transmissions and manual transmissions and what are the positives and negatives of each. (For example, MT is said ...
6
votes
2answers
66 views

Car battery appears good but car won't start

My 2005 Nissan won't start today. Battery is relatively new(about one year old) and I can turn the lights on, front headlights, and it appears fine. However, when I tried to start the car by turning ...
2
votes
1answer
25 views

Toyota Camry 2003 drive seat won't move forward

We have a 2003 Toyota Camry. Its driver seat power track won't move forward as it turns to the right after about 1/4 inch movement and cannot go forward. However, it does go backwards all the way. ...
0
votes
0answers
22 views

Can I increase the power in the high tension leads? [closed]

I want to increase the spark from 2kv to 7kv the spark going in one lead is 2kv and the lead coming out is at 7kv. This is for petrol engine.
0
votes
1answer
33 views

Kia with no power

I have a Kia just bought a battery last week. My car will not start today. No clicking sound no lights no radio my car won't even lock nothing works. What could this be?
5
votes
1answer
104 views

Citroen C4 - Poor idle and low rev performance?

I have a Citroen C4 1.4 with 1360cc 16V KFU / ET3J4 petrol engine with 120.000 km. This problem appeared 3 - 4 years ago at around 40.000 km. When the engine is cold / hot there is a flat spot ...
2
votes
3answers
119 views

Is there a fuse that will turn off with a delay after turning off car?

I've installed LED lights in my car and I wanted to find a power source that will let it stay on for a while after turning off my car. I noticed that the power windows still work after turning off ...
5
votes
3answers
205 views

Need to source PD-pump for small engine dyno school project

I am making a dyno to measure go-kart engine torque for a high-school project. I would like to use a water brake by varying input/output through a water pump and have read that this should be a ...
3
votes
4answers
328 views

Mondeo MK3 power consumption and damaged radio

I'm not quite sure if this is the best Stack for my question but I will try. So from some time I noticed that in my car when engine is turned off there is still quite huge power consumption which ...
6
votes
1answer
352 views

Measuring Horse Power and torque without a dynamometer

I know I can take my car to a workshop and have a Dyno Run and can read the HP and torque figures from that. What I want to know, is there an alternative way to know the HP and Torque figures without ...
3
votes
0answers
45 views

SAAB 9-5 wagon throws P1549 Code (Boost control valve)

I called an ASE-certified mechanic. He charged some $60 for the visit and $60 diagnosis and really he didn't quite spot on anything. Left me where I was - work-wise , diagnosis-wise and ...
5
votes
0answers
76 views

Rattling sound and loss of power

My brother's Toyota started making a funny rattling sound and lost about a quarter of its power. The rattling seems to come into play when it's under load, like when he's going up a hill or trying to ...
1
vote
1answer
74 views

2007 chevy cobalt reduced engine power

I have a 2007 Chevy cobalt that shows a reduced engine power error. The problem is sporadic sometimes it will run like a sewing machine and other days it will show the error and shake like it is about ...
3
votes
2answers
518 views

Will an auxiliary battery hurt a vehicle's alternator?

I am going to be road tripping and living out of my SUV for a while. I need a way to power a tiny portable cooler/fridge 24/7 and would like to be able to power my cell phone, laptop, and maybe a few ...
2
votes
1answer
53 views

Honda Shadow VT750 louder exhaust noise, low power

Recently, my motorcycle got smashed by my girlfriend (who was driving behind me) in the rear. As a result of the impact, I got propelled into the rear of the car in front of me. Both fenders are ...
1
vote
0answers
40 views

Motorbike Lack of power/speed [closed]

I bought an ajs dd125e-8 it was delivered on Monday and I had no problems until yesterday on my way home from work. I got half way home and the bike just started to slow down and no matter how much ...
5
votes
4answers
1k views

Why does the power output peak and then drop as engine speed increases?

I have been looking at the power bands for my car (2000 Opel Agila 1.2) recently, as I want to work out when it is best to change gear and stuff, as I have no life! This is the approximate graph I ...
1
vote
0answers
83 views

Renault kangoo 1.4 2006 has no power

My vehicle has no power.. she will drive and reach normal driving speeds for both town driving or open road..however when i need to gear down to overtake or when i need power, she falters and starts ...
3
votes
1answer
129 views

MX5 lost power after spark plug change

I own a Mazda MX5 mk2 1.6L. I had severe problems with engine misfiring, caused by the valve cover seal, to leak. The oil that was leaking was concentrated near the spark plugs, and periodically it ...
0
votes
1answer
228 views

Prestone power steering fluid

Can I put Prestone power steering fluid into a Buick Enclave? Or does it require OEM fluid?
0
votes
1answer
91 views

two 12 volt power sources into one device

How can I power one 12 volt outlet (feeding a xm radio transformer) from two separate 12 volts sources on a RV (ignition and coach power). Is it feasible to use 2 diodes
2
votes
1answer
157 views

A Suzuki GZ125 marauder that won't power on at all

I've been having a problem with my bike. I went to go to work in the morning and it turned on ok. Left to run for a few minutes then cut out. It turned over again and same thing ... I tried a third ...
4
votes
2answers
75 views

What's an acceptable battery power drop on light load?

After an overnight rest in the warm weather (above 16 degC), unlocking my 2008 Jetta 2.5L SE, my OEM battery with the minimal "welcome" electronics -- remote open of the driver door a few seconds ...
1
vote
1answer
141 views

Battery high voltage

I measured my "cigar socket / outlet" with a multimeter. Instead of 12v it had 19v. Is this normal? Is it my voltage regulator, alternator, battery that has problems? Car: Peugeot 307, 2.0 XSI 2003 ...
4
votes
1answer
126 views

Could 1.9 Nm be enough to accelerate 130kg electric go-kart?

I'll apologize in advance for a fuzzy question. My problem consists of two parts. For starters, I'm trying to buy a DC engine for learning purposes and most of them only specifies the watt (which I ...
3
votes
0answers
190 views

97 Jeep Cherokee check gauges light came on and then my battery gauge dropped down to 9 didn't lose any power?

I'm so confused I had just left my house and got 3 blocks away and my check gauges light came on, then my battery gauge dropped down to 9v. My Jeep didn't lose power, and the radio, heat, lights and ...
3
votes
4answers
194 views

Why dual motor Tesla has more autonomy?

Maybe the question is more appropriate for Electronics Stack Exchange, I don't know. In the page http://www.teslamotors.com/models if we scroll down we see the several flavors Tesla sells its Model ...
2
votes
1answer
124 views

1988 chevy k1500 350

I have a chevy that has a loss of power and stalling. About a week ago I drove it and it would spin the tires over, but the next day it wouldn't. it could be bad gas the truck was in the shop for ...
2
votes
1answer
340 views

Engine, sudden reduced power with soft shaking

I have a 2007 Holden with a 2.0 Turbo engine. On one day I decided to go through a light that had just turned orange- so I pressed down, not completely as I new how much power I needed to go through ...
5
votes
5answers
1k views

What good is it for an engine to have lower CCs and higher BHP?

I was watching "The Perfect Road Trip 2" by Top Gear, where at some point Richard Hammond is driving a Mercedes A45 AMG. He says that the car develops a whooping 355 BHP, and all that comes from a ...
3
votes
0answers
139 views

2001 Subaru Legacy L Wagon - Gas smell and light shaking

So... It is really freezing and has been really cold these past few days. But, my 2001 Subaru Legacy L Wagon started acting up. First, here are things I know been replaced before I got it - Tires, ...
3
votes
1answer
5k views

how fast does the alternator charge the battery?

It would appear that the common word of wisdom is that car alternators provide 50A of output. I actually looked at the supposed specs for my 2008 Jetta 2.5L on the internet -- a compact car -- and it ...
4
votes
1answer
152 views

how do i know if my lead-acid battery has been resurrected?

The OEM battery in my 2008 Jetta SE 2.5L has been nearly fully discharged one month back (had insufficient surface charge after a prolonged use without the engine running, but leaving it idle for 20 ...
4
votes
1answer
84 views

Alternator/Battery power question

Good Afternoon, I have a 2014 Ford Focus SE that i use as my Work Vehicle. I work in Emergency Roadside Assistance. I have to run a laptop In the car in order to direct calls to other employees and ...
3
votes
2answers
1k views

would a sulfated discharged 12V battery charge at 12.5V?

I got a Stanley FATMAX RE-CHAGEiT 8AMP Automatic Battery Charger & Maintainer from Walmart for 29,97 USD, which appears to have three states of charging the battery -- detecting the voltage, rapid ...
3
votes
0answers
258 views

1992 Mitsubishi 3000gt sl. no power and won't go above 2k rpm

I bought an automatic 1992 Mitsubishi 3000gt sl 2 days ago. I got it cheap knowing it would have problems, and that's why I'm here. When I put it in drive and slam on the gas the car just simply ...
4
votes
3answers
960 views

BMW e36 320i motor looses power significantly out of a sudden

I have a 1992 BMW e36 320i, when i start in the morning, or in cold weather, the cars functions normally and has a lot of power. However, after a little, or when the weather is hot, the car ...
3
votes
1answer
65 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 ...
5
votes
5answers
11k views

How does cold, dry weather affect horsepower?

It's now properly winter over here in Australia, and the butt dyno is very favourable of the cold, dry air. It's like a free cold air intake for everyone, right?? I can think of two scientific ...
1
vote
2answers
303 views

2002 VOLKSWAGEN GOLF CL 1.4 - No power for first 3 mins driving

My car is displaying the engine management light on the dash. To date my mechanic has replaced a pencil coil and cleaned the airflow meter. First he said it was the lambda sensor that was not ...
3
votes
1answer
178 views

Will a 12 V cooler box significantly affect the performance/gas mileage of my car?

I have an Apollo brand 12 Volt Cooler/Warmer, designed to plug in to my car's 12 V cigarette lighter. I am wondering if the power this device uses will significantly affect my car's performance or ...
3
votes
1answer
655 views

2001 Hyundai Santa Fe power steering leak

Where is the power steering return hose on a Hyundai Santa Fe? Is there a diagram somewhere that shows how it is run?
0
votes
2answers
111 views

Mustang V6 sluggish pickup during day

Have been driving my stang 2013 V6 for almost 2 years now. Right from the day 1 I have noticed that outside temperature somehow made my cars acceleration/ pickup however you call it become sluggish. ...
-1
votes
2answers
432 views

The disadvantages of mitsubishi lancer 2007 [duplicate]

I am planing to buy a new car that has to be good enough to be used everyday . I have tried the speranza and the brilliance but weren't good and not reliable to be used everyday . Many friends ...