is it ok to drop your can down into 4th gear at say 70. what do u think u RPM's will be at.

 

What for????[&:]

 

Because i was on the high way a few nights ago, and a ricer pulled up next to me, we where going about 60 or 70. He was trying to race but i didt want 2 drop it down into 4th because i didnt know how good it would be for my car.

 

so did you expect to race him in 5th.. lol. you should have dropped to 3rd gear. if you were going less than 60 then 2nd gear. If your not gonna shift gears when you need to, you might as well have bought an auto. oh to answer your quesiton, no its fine to do that, im guessing it would put you at like 3000 rpms? just make sure your bring up your revs before you release the clutch.

 

Its not gonna kill your car dropping into 4th. If its for a race or you need to pass someone, drop it into 3rd and whale on it then hit 4th. Think about it, automatics downshift on the highway when you floor it to pass someone.

 

ok thanks.

 

of course you can.....an auto won't run wot in od so it will shift to 3rd til you lift....

a 5-speed you can run about 120 even w/ 4.10 gears in 4th.

 

I don't know what the gears are in your trans or differential, so I can't answer your question.

When you downshift for power or acceleration, you want to shift to the lowest gear where thee RPMS are below the red line.

to help you if and when this happens again you can make a table and tape it to the dash: I do it with my cars, at least until i have it memorized. For example, our Camaro has the following:

Gear Redline (6700)
1st - 37 mph
2nd - 62 mph
3rd - 91 mph
4th - 121 mph
5th - 151 mph
6th - never gonna downshift into this gear

Thus, if I were going 70 and wanted max power, I'd downshift to 3rd, because the car redlines at 62 in 2nd but 91 in third: third is the lowest gear where the redline is > 70 mph.. 70 mph would put me at about 5200 RPM which is right above the torque peak, so the car would be in the power band: that is the most acceleration I can get in 3rd.

You can determine your redline speed in each gear by simply driving at a set RPM (say 3000) in each gear. Say you go 24 mph at 3000 RPM in 2nd. that is 24/3 = 8 mph for each RPM. Lets say your redline is 6500, then the speed in this gear at redline is 6.5 times 8 mph or 52 mph. You do that for each gear to get your table.

Also, learn to downshift well, using the throttle to bring th eengine up to about the right RPM and letting in the clutch quickly but smoothly so you don't shock the driveline or engine, particularly before you downshift into high RPMS.

 

Ok thanks man that is alot of help