A&Q about 350Z
Q:
Reason 1: A car powered by a 1500 hp diesel train engine probably not be a good dragster even with ample torque and hp. Maybe it would win a tractor pull??
Reason 2. I suck at shifting fast enough so I always used an auto tranny. Still did'nt always win :-)
A:
In Australia the highest Hp reached is 1400Hp and the car was firmly on the the rollers. How do think prostock teams record their slight increases in power when they change setups in their engines?Dyno, Top Doorslammer reach 2000Hp on the dyno.
A:
I believe the highest rated engine dyno goes to somewhere around 5000hp... he definately could have had the car dyno'd. Maybe not chassis dyno, but definately engine.
A:
You've obviously been fed some misinformation. HP doesn't exist without torque. Its a mathematically calculated physical property of torque as it applies to time. HP is a number we use to demonstrate a physics property, not a property itself. When you put a car on a dyno, it doesn't measure HP, it measures torque and plots HP as a FUNCTION of torque. HP = TQ x RPM/5250. ts always going to be that way and you can't change it. The only way to change HP is to increase torque, or increase the RPM where that torque happens.
The reason those bikes to which you refer need to be tow started is not because they lack torque, its because their gearing reduces the torque made by the engine... or more properly stated, their gearing doesn't provide as much torque multiplication as a lower geared bike. Its no different from a bonneville top speed car. They can achieve incredible speeds, but don't have enough torque making it to the ground to start rolling on their own.
A:
One more little tidbit for you.... Torque is commonly measured in foot-pounds. Common ways of expressing power is in horsepower, kW, and... foot-lbs/second. One HP is equal to 550 ft-lbs/sec. Further proof that HP is a function of torque over a period of time.
A:
so what do they have 1 HP engines? with 0 torque? there has to be a form of power without torque or those engines wouldent do anything...
and the reason they needed to be tow started is BECAYUSE THEY LACKED TORQUE!!! the gear ratios were HUGE making them go hela fast but have no power on the line... u said it urself right there in the post... there has to be another form of power measuremnt if we cant meausure there power in HP/TQ...
quote:
Reason 1: A car powered by a 1500 hp diesel train engine probably not be a good dragster even with ample torque and hp. Maybe it would win a tractor pull??
actualy... if u could fit it in there it probably wouldent be to bad... the reason trains dont have the power is that they have massivly low gear ratios and this CRAZY torque for pulling large loads with little HP
A:
Perhaps you should read up on some facts before you continue arguing with people that actually know their shyt...
A:
So Legionofone... have you told your pops that hes right yet? Or is this thread going to have to keep going and going?
A:
Those engines DO make torque. Just because they don't advertise it doesn't make it non-existent. I never said that those biked didn't MAKE torque, I said that the gearing reduces it. The gearing can't change what the engine makes.
The honest reason why everything is advertised in HP numbers is because the general american public is too stupid to know any better. People flock to dealerships to buy the "new 230 hp 4-cylinder tuner" and wonder why its dramatically slower than their 5000-lb 1976 Cadillac with only 239 hp. Its torque. That 4-cylinder may only have 190 ft-lbs of it and you have to rev it to 6000 just to get it. The Caddy has nearly 600 ft-lbs and its available to the wheels from idle to almost redline.
Horsepower used to be a great way to advertise back when people understood it, but its become the most misunderstood name in automobiles.
Its much like Watts = volts x amps. Every body knows what to expect from a 100 watt light bulb, but they have no idea how it acheives that amount of light. No one realizes that for every drop in voltage, the light sucks more amperage. That is a pretty good analogy for HP. You can make HP with lots of torque (high voltage) and it doesn't need to work hard (low amperage). Or you can give it not much torque, like with your skyline engine (low voltage) and it will require much more revs to get it (high amperage)
A:
Heres just a small example of what i have seen for myself. 2 identical toyota corollas one with a 1jz twin turbo supra engine imported from japan with an aftermarket management system tuned as best as possible. and the other with a chevrolet stroker. thats a 350 built to a 383 with a 327 crank and long rods for all you import guys out there. never dyno tested but the chevy power car was naturally fueled with carb prolly made around 450 hp. and the other engine to the best of my knowledge made about the same but i would guess a little more hp. I know the outcome of the 5-6 times we ran them side by side in the 1/4 mile any of you have any guess what happened???? It really was an interesting turn out
A:
supra engine probably spanked it ?
A:
Legionofone, I think what people are trying to tell you is to have an open mind. There isn't a specific engine that is the 'holy grail' of all. Listen to other people's replies. There are some knowedgable people that post in this forum. Think of it as free education. Knowing the facts will in turn make you more knowledgable and have better opinions.
If you have questions, be honest and you will get honest replies.
A:
Its never gonna end... I think we'll just have to cut our losses and chalk this one up to 2much 2f/2f.
Supras are not God. Nor are Skylines. Or Ford, Chevy, inline 4s, 6s, v8s, v6s, v4s, 2strokes, 4 strokes etc etc. They're all the same, they're all different, they all serve their purposes; how well is in the opinion of each individual.
But to answer your question, the v8 is always faster
.
The V engine configuration has a bonus that it has fewer main bearings than the inline config. It also has a HUGE bonus in that it is the only allowed engine configuration in the super-powered classes of the NHRA. So naturally, the v8s are going to be the ones putting out the most power, simply because they are the engines required to be built by the best of the best.
So just pay your dad the 20 bucks and stop dreaming of inline sixes. If you like turbos or s/cs or n2o, go buy a car with a big block and throw all three on it. Be assured... there is NO replacement for displacement if your only goal is to make big power numbers. And don't tell me about superchargers and turbos and n2o as a replacement. Because you can do all those things to a bigger displacement motor and get even bigger gains.
There are PLENTY of street legal muscle cars that put down over 1300hp. I mean, you can easily throw a 550+ cubic inch(9 liters) big block into any number of new or old cars, throw a pair of screw superchargers on it pushing 15psi, add a couple of stages of 400hp fogger nitrous to boot, and easily hit 1500 or 2000hp. All the parts you will need can be easily obtained with minimal effort(rather large wallet though, probably cost in the 15,000-20,000 range, depending on what you can do yourself) from any number of major parts suppliers.
Just look at it this way... Top fuel dragsters run low 4s in the 1/4 mile. They're powered by big inch v8s. Lets say they were actually powered by the 1300hp supra engine. The cars would have to weigh in at around 500-600 pounds to make it physically possible run that fast in the quarter with that much power. So if you managed to bolt the supra engine to a pair of axles and threw a seat on top of the valve covers, ignoring all of the complex suspension, chassis, and aerodynamics equipment to cope with that kind of accelleration, you could probably run a low 4 quarter..
That should give you an idea of how much power the v8s make. Considering the top fuel dragsters weigh somewhere in the area of 2600lbs.
A:
ok i guess i give in and have to lose the bet... GRRR!!! i hate that... thanks yall for the info and sorry for being a ass at time... hehe latez!
A:
hum...if HP seems to hold little to no value...why was the formula created for what purpose if there was no purpose then why use it?
And don't gave me anything about advertisers polluting the mind of the buyer into thinking HP is the only thing you need. i wanna know why.
i see HP as equaling work...more HP more work is done. Torque may be the driving force but there is no work behide torque if there isn't any movement...if i push against a walll i may be appling force but i'm getting no work done because the wall isn't moving in the direction that i'm appling my force in.
with the transmission..i can double the torque or half it but HP remains the same...as long as i have HP i can do what i like with the torque given to me. i can make a strung out racing engine look like a big V8 on the output shaft of the transmission, just as long as both engines put out the same HP.