is it better 2 shift at 5500rpm or at 6600rpm on my 98 honda civic ex?

Question

127hp@6600rpm 107tq@5500rpm in wich rpm will i get more power

Answer 1

Those are stock numbers. People are assuming that you've modified the car.

In a 9 year old stock car - I wouldn't go beyond 3-4,000 rpms in gears 1-4 and stay under 100 when in 5th.

Answer 2

most of these answers are goofy. I run a 10 second car and have been doing it for years. You need to compare time slips if you are a drag racer. When we build a new car we try different rpms to find out when the cam is working this is your rpm range. Its good that your motor will turn 6800 but is it really making power at those rpms. Heres what you do. Go to the track, start out setting your shift lite at 5000, When you get your slip back, write 5000 rpms so later you will know. And on your next pass bump it up to 5200 do this until the car slows down. When the car slows down go to the fastest rpm. You should be able to feel when your motor quits making power. If this is too much work then you need to get in your car and run it until it quits pulling. (hopefully it has enough power for you to really feel the car shutting down). But yes the higher the rpm the faster you will be replacing your motor. I hope this helps. (by the way we shift my currnet small block at 9600 rpms) I know what Im talking about.

Answer 3

Shift at or slightly above max power not to have rpm's fall below max torque for fastest acceleration. For engine life you might want to slow way down. Practice Xmas tree and just how much clutch slip on take up all are going to pay dividends at the strip. You are doing something if you can get the car to move 60 ft in less than 2 seconds with street tires. Time slips tell it all look at them every run. Weight your car at the other end of the track then take the back seat out spare tire and passengers seat out and do it again. Then start experimenting with tire pressures. Next time at the track buy a set of rims for drag radials and finish off your clutch. Now with a stronger clutch try it again viola! 1.9, 60 foot on your way to a 15.5 second 1/4 mile. Ringing out a old motor may prove costly always keep another motor ready to go in.

Answer 4

6000 RPM is best. It'll drop your RPM's down just below peak torque after you shift giving you the best acceration after the shift.

Of course your engine is gonna die alot faster due to the high stresses on everything shifting that high. Not to mention your clutch and transmisson.

Shifting at that high causes shockloading. Basically your engine is turning much faster than everything else and when you hit the cluth and disengage the transmisson it causes shockwaves to go through everything connected to it.

I'm sure you've felt it.

What you need to do is strengthen everything up before you go around shifting like that all the time.

Or you can just add more horsepower with bolt ons so you don't have to shift as high to get good acceleration.

And street racing is dangerous, don't do it. Keep it on the track buddy.

Answer 5

KR thinks he knows what hes talking about, but he really doesnt.

its much more complex than that. You shift at the point where the torque youre making in this gear is less than the torque youll be making in the next gear. It requires you having dyno readouts and such, but its not too difficult.

technically its even MORE complicated when you throw shift times and such into it (your goal is still to stay in a gear longer, so shifting at that point if its sooner than the redline isnt always advantageous), but the simple way is still a very good idea.

Answer 6

No No your getting it all wrong. Okay here's how to do it. Shift at like when the RPM is about to hit redline that lies the most power. And since your model redlines at 7,000RPM shift at 7,000 RPM. VTEC kicks in at maybe 5,000 RPM so if you shift too early then you wouldn't get the best of the VTEC. So remember shift at 7,000 RPM.

Answer 7

5500 is peak torque - pulling power. 6600 is peak horsepower. Shifting at a point between the two is best for the engine and trans. While the redline is higher continuously shifting at redline will decrease the life of the engine.

Answer 8

redline if you are drag racing but you dont want to redline it all the time it will stress ur engine and get alot more ware. also your car will drink alot more gas.

Answer 9

8800rpm is best for that small an engine