string227 Posted September 17, 2007 Share Posted September 17, 2007 Im just wondering that how come when your car is on the ground it sounds like this. (normal car) rrrrrrrrrrrRRRRRRRRREEEEeeeeee.......rrrrrrrrrrrrrrrrrRRRRRRRRRRRRRREEEEEEEEeeeeee....... (diesle powered) BBBBBLLLLLUUUUMMMMMMmmmmmm.......BBBBBLLLLLLLLLUUUUMMMMMMMMMMMMmmmmmm and when its off the ground it stays in 1 gear and instantley goes back to 1500 rpm or lowest rpm when you relase the gas RRRRRRRRRRRRRRREEEEEEEEEEEEEEEEeeEeeEeeEeeEee BBBBBLLLLLUUUUMMMMMMMMMMMMMMMMMMMMMMMMMM why is that? pelase explain it to me ...... means a shift green is low rpm (1500-3000) and for the semi truck (100-300) yellow is medium rpm (3000-4000) and for the semi truck (300-500) red is highest rpm (4000-9000) and for the semi truck (500-1000) Link to comment Share on other sites More sharing options...
SIP YEK NOD Posted September 17, 2007 Share Posted September 17, 2007 umm......wow. when a vehicle is driving, and you accelerate, then release the throttle, it takes a while to get back down to idle, because the momentum of the car is forcing the wheels move, and the drive line is transferring that movement back to the engine. when a vehicle is off the ground, there is very little momentum, and the compression of the engine can much more easily absorb the momentum of the tires spinning. most vehicles will shift if there is no resistance on the tires. look at a dyno. Vehicles with a weak transmission won't until you allow them to by letting off the throttle slightly. it is near impossible to do so with a large truck, because the engine and transmission must be turning at the correct RPM to get into the next gear, and if the rear wheels are off the ground, the resistance in the drivetrain will slow the transmission down as soon as you engage the clutch making it near impossible to get into second gear. Shifting in a semi is much different shifting in a regular vehicle. with a regular vehicle you can shift into any gear as long as the input shaft of the transmission is spinning within the RPM range of the engine, this is because they use a synchronized transmission, the gears are constantly in contact, which gear is in use is determined by which gear is locked to the shaft. with a semi, there is a much smaller tolerance because they use an unsynchronized transmission, which means you have to hit a certain gear at a certain speed so the output shaft of the engine matches the speed of the gear on the transmission and when you first start driving, it could be very difficult to catch a gear. thats why you hear of drivers losing a gear on a hill, and having a run-away. they go to downshift too late in the hill, and cannot catch the gear they want because the weight of the truck is causing it to speed up beyond what the transmission is capable of controlling. then they ride the breaks, the drums heat up, expand away from the shoes, and boom, no control of the speed of a 100 thousand pound truck. i hope your brain didn't explode there, you might need an aspirin or something. Link to comment Share on other sites More sharing options...
Picolini Posted September 17, 2007 Share Posted September 17, 2007 Is this refering to the cars in GTA? If so, it's just different sounds for different cars. Some cars in the game have deeper engine sounds than others, generally the trucks. As for it going really high when in the air, the cars are all automatic, so with out any traction/friction, the engine is free to rev to top gear and top rpms, so it sounds alot higher than normal. Now if this is about real life, what the hell are you talking about??? When do semi trucks go off the ground? Maybe in movies, but they usually make an explosion soon after. Link to comment Share on other sites More sharing options...
string227 Posted September 17, 2007 Author Share Posted September 17, 2007 (edited) Is this refering to the cars in GTA?If so, it's just different sounds for different cars. Some cars in the game have deeper engine sounds than others, generally the trucks. As for it going really high when in the air, the cars are all automatic, so with out any traction/friction, the engine is free to rev to top gear and top rpms, so it sounds alot higher than normal. well that just explained about it.But i ment in real life.But if theres no pressure or friciton applied on the wheels and the car,and since there is no friciton in the air the transmission stays at a gear and can rev up to any rpm.Well thanks for explaining that too me guys,relly appriciate it oh and to narrow things down,the RPM (revelutions per minute) counts how many times the pistions burn fuel,if its at 3200 rpm the pistions are burning 3200 cylinders of fuel per minute. Edited September 17, 2007 by string227 Link to comment Share on other sites More sharing options...
SIP YEK NOD Posted September 17, 2007 Share Posted September 17, 2007 (edited) oh and to narrow things down,the RPM (revelutions per minute) counts how many times the pistions burn fuel,if its at 3200 rpm the pistions are burning 3200 cylinders of fuel per minute. no, just no. RPM means revolutions per minute, as in revolutions of the crankshaft in a minute, with a V8, one revolution of the crank shaft means 4 explosions since in that one revolution, each cylinder completes 2 cycles, either one intake and one compression, or one combustion, and one exhaust Edited September 17, 2007 by SIP YEK NOD Link to comment Share on other sites More sharing options...
swolo yaggins Posted September 17, 2007 Share Posted September 17, 2007 the RPM (revelutions per minute) counts how many times the pistions burn fuel,if its at 3200 rpm the pistions are burning 3200 cylinders of fuel per minute. lol, how many cylinders of fuel are in a gallon? There are so many things wrong with your statement my head is about to explode. 5192:12.3.02LM/SSHmkl Link to comment Share on other sites More sharing options...
Mega Posted September 17, 2007 Share Posted September 17, 2007 .... damn. Signature soon. Link to comment Share on other sites More sharing options...
XN22 Posted September 17, 2007 Share Posted September 17, 2007 I advise you to read up on a little theory and stay off this board for a few months, for your own good. Link to comment Share on other sites More sharing options...
Starion Posted September 17, 2007 Share Posted September 17, 2007 well that just explained about it.But i ment in real life.But if theres no pressure or friciton applied on the wheels and the car,and since there is no friciton in the air the transmission stays at a gear and can rev up to any rpm.Well thanks for explaining that too me guys,relly appriciate it oh and to narrow things down,the RPM (revelutions per minute) counts how many times the pistions burn fuel,if its at 3200 rpm the pistions are burning 3200 cylinders of fuel per minute. Seriously, get out. mod it with Nitrous Oxide and chassis dyno. Link to comment Share on other sites More sharing options...
Primer43 Posted September 17, 2007 Share Posted September 17, 2007 well that just explained about it.But i ment in real life.But if theres no pressure or friciton applied on the wheels and the car,and since there is no friciton in the air the transmission stays at a gear and can rev up to any rpm.Well thanks for explaining that too me guys,relly appriciate it oh and to narrow things down,the RPM (revelutions per minute) counts how many times the pistions burn fuel,if its at 3200 rpm the pistions are burning 3200 cylinders of fuel per minute. Seriously, get out. I agree. @topicstarter: Just look at what you posted... Link to comment Share on other sites More sharing options...
lurchseesu420 Posted September 17, 2007 Share Posted September 17, 2007 Is this refering to the cars in GTA?If so, it's just different sounds for different cars. Some cars in the game have deeper engine sounds than others, generally the trucks. As for it going really high when in the air, the cars are all automatic, so with out any traction/friction, the engine is free to rev to top gear and top rpms, so it sounds alot higher than normal. well that just explained about it.But i ment in real life.But if theres no pressure or friciton applied on the wheels and the car,and since there is no friciton in the air the transmission stays at a gear and can rev up to any rpm.Well thanks for explaining that too me guys,relly appriciate it oh and to narrow things down,the RPM (revelutions per minute) counts how many times the pistions burn fuel,if its at 3200 rpm the pistions are burning 3200 cylinders of fuel per minute. What in the F*CK are you talking about. Please Leave! NOW! Link to comment Share on other sites More sharing options...
Mega Posted September 17, 2007 Share Posted September 17, 2007 Honestly i really really don't know how to take it. I'm still stunned since yesterday. Signature soon. Link to comment Share on other sites More sharing options...
string227 Posted September 18, 2007 Author Share Posted September 18, 2007 so were going throw the cycle of me being a ass agin? its starting up soo ill just leave this topic and post ACCTUAL TOPICS.lock this thread please. Link to comment Share on other sites More sharing options...
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