The basic rule is that you change up through the gears as the speed of the car increases and down when you need more power from the engine. For example, you would change down to a lower gear when climbing a hill or pulling away at low speed. First gear provides the most pulling power but the least potential for speed, whilst fifth gear which provides the least pulling power allows the greatest range of speed.
The following table indicates typical speed and revs for changing gears up or down. As the car increases speed, change up through the gears. When you want to slow down, use the foot brake. Selective gear changing means you sometimes miss out gears, for example, by changing from fifth or fourth gear to second gear. There are also times when you might selectively change up, for example if you have used a lower gear such as third for better acceleration you might be able to change to fifth gear when you have reached your intended cruising speed.
Post by Debaser » Sun Jun 21, pm. Post by Tups » Sun Jun 21, pm. Post by theholycow » Sun Jun 21, pm. Post by watkins » Sun Jun 21, pm. Post by fa22raptorf22 » Mon Jun 22, pm. Post by Tups » Mon Jun 22, pm. Post by jomotopia » Mon Jun 22, pm. Post by buster » Tue Jun 23, am. Post by gizmo » Tue Jun 23, am. Post by gizmo » Wed Jun 24, am. Privacy Terms. Quick links. Too fast for 1st, too slow for 2nd.
What do I do? Read the FAQ and still not sure about something? Want to shift faster? Post here. They've rebuilt it now and no one has died there in at least twenty years. Society of Automotive Engineers defined "overspeeding an engine" as operating it beyond the rpm at which maximum HP is developed.
I believe they developed this standard in the mid to late 's. I would be cautious about deriving a red-line spec based on "modern" post vehicles. With the exception of the Ford and GM inline sixes, no one has built a mass-produced "under-square" long-stroke engine in 50 years. Edit: Referring to American gasoline engines for passenger car or light-trucks.
The issue is piston speed and the fact that the reciprocating mass has to change direction twice for each crankshaft revolution. This mass is larger for long-stroke engine longer rod , so there is more stress on the wrist-pin and the rod bearing end. As far as what the "factory spec. Ford engine was capable of", how many of our engines are still "to spec", and how many are "unknown"? If "unknown", treat it conservatively. I do not think it would do 30 in 2nd.
If you're pulling a hill, and you've got a line behind, find a place to pull-aside and let them pass if possible.
If not, they'll just have to wait. Don't wreck your engine because of some jackwagon in a hurry. If it's a long, 2nd gear hill, pick a speed that sounds "happy" for your car, and sit back and plug away. Model A parts, engines, and machine work were cheap and plentiful in the 's, so not a big deal if you blew yours up. Not so in SC Frank.
Originally Posted by Special Coupe Frank. I have a tac in my car and I generally don't rev it past On a long hill the engine seems happy there and I don't feel anything is going to blow. If you have a balanced blueprinted engine I'm sure it would feel fine well past but mine is just a stock engine. Many modern diesels are.
My wife's Jetta is Red line is Certainly built for torque. Surprisingly at least to me , the torque is only 1. The ratio would be even less if it was normally aspirated. Our A's are torque monsters! The Jetta stroke is shorter than most engines designed before the OHV V8 era primarily because total displacement is only cubic inches. I don't think there were many engines that small in 30's's. I agree that if you restrict to gasoline car engines, it would be tough to find one less than 50 years old with a stroke longer than the bore.
The closest I can come is a Studebaker V8 with 3. I shift by ear and feel, which is sooner rather than later. I strive for no grinding and low R's. Originally Posted by Synchro I drive with Grace, not pace. Originally Posted by steve s. The horsepower vs. Would like to back up the bus a bit here. Ford came out with the 5. Definitely under square! The 6. So the A is more nearly "square" than a late model F!
A lot of other modern US gasoline engines are also under square, though by not nearly as much. Originally Posted by Chippy Minton. Three eighths of an inch is huge in engineering terms. Saying that an A engine is nearly square is a bit like saying that your girlfriend is a bit pregnant.
Both things are black and white. Originally Posted by Ian Curtis. The thing that would prevent me revving my Model A too high wouldn't have anything to do with the cylinder configuration as were hardly talking about high revs here. What I would be more worried about would be the basic valve system and the efficiency of the valve springs in particular. Thread Tools.
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Find More Posts by Fullraceflathead. Sponsored Links Register now to hide all advertisements Wow, I need to figure out what my rear gear ratio is. Were there different options for ? My car revs so high it sounds like it's going to blow up if I go faster than in second or in 3rd. I can't see how anyone could get up to 55 without doing some damage.
Is it possible I have a 4. Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Dissertation Can you go 60 mph in 2nd gear? Ben Davis March 3, Can you go 60 mph in 2nd gear? Is it bad to drive in 2nd gear? How fast can u drive in 2nd gear? Does driving high speed on low gear damage the car?
Which gear is best for driving uphill? How fast should you go in first gear? Does holding the clutch damage it?
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