2.2 to 2.5 with common block

[OmniSRT4]

Quote:

Originally Posted by The Barron Whats all this talk about 6000+Rpm?!! My 2.5L is completely useless above 5600-5800. It "felt" best shifting at 5200. The 2.2L cant be THAT different of a beast. I mean my 1.6L swift only sees 6K when I reaaallly wanna eeek out the tires in 2nd gear.

Someone here thinks his 2.5 "pullls hard" at 7500rpm.... hence the conversation. We were not discussing a 2.2.

Your 1.6's max rpm is completely unrelated. Rev limits are mostly related to stroke...and just because its 1.6 liters, does not mean it has a short stroke.

There are of course may other factors besides stroke, but that is the main one. However, if I didnt write this part, 10 random morons would jump in and try to "explain" things to me that I already know. Hence the general problems with TD. com.

[OmniSRT4]

Quote:

Originally Posted by dynodon Dude ....don't get your panties in a bunch ......chill out .... I assume based only on your response .The more you write the more is revealed about each person . My point was you can make power above what your experience has shown. By the same token I know you find it hard believe.....but in the end ...WHO CARES . But you did hit a key point TORQUE..... That is the most important equation of all... to quote Mr. Shelby "Horsepower sellls cars ....Torque wins races" That's enough of that ...Happy motoring

Too bad thats not true. Dont believe me? To quote you. "WHO CARES?"

(Hint: Try checking out an Indy cars stats)

I guess they dont believe that torque wins races.

I don't understand the argument of horsepower vs torque. It depends on the RPM range the car is intended for and will be run at the most. People complain when a car like the s2000 has a lot more HP than torque at 9k rpm's, well isn't this inevitable given the equation: torque x RPM x 1/5252 = HP?

I used to think the relationship was very complex but rather it can be explained simply in the above equation. No need for a mechanical engineering degree.

one question though. it seems to me that there would be a certain RPM where HP and TQ are equal in each car. Is this RPM constant no matter what the number that they converge on is?

Ex. does a 100hp engine have matching 100tq at the same RPM point that a 300hp car has 300tq?

[Koreth]

yes, at 5252 RPM, HP and torque will always meet, and the equation you describe in your post explains why. The dyno plots I've seen seem to confirm this.

that's what I thought, thanks

[The Barron]

Easiest thing to do is dyno it and find where your engine peaks and set that or maybe even 50-100rpm lower as your shift point.

Quote:

However, if I didnt write this part, 10 random morons would jump in and try to "explain" things to me that I already know. Hence the general problems with TD. com.

Also some other general problems with TD.com would be 10 random morons that jump in and puke on people with their attitude problems. Thats the only thing that REALLY can make this place sour. Think about it.

[OmniSRT4]

Quote:

Easiest thing to do is dyno it and find where your engine peaks and set that or maybe even 50-100rpm lower as your shift point.

I must disagree. The ideal shift point would be right when you are no longer making more power in the gear you are in, than you would make if you shifted, not at the peak. Think gear ratio's/torque multiplication.

Quote:

Also some other general problems with TD.com would be 10 random morons that jump in and puke on people with their attitude problems. Thats the only thing that REALLY can make this place sour. Think about it.

I would agree, but you are most likely referring to me, while I would apply that statement to several other people that you probably like.

What I stated was a fact. Its happened far too many times.

[DakotaKid]

Quote:

Originally Posted by Akuma I must disagree. The ideal shift point would be right when you are no longer making more power in the gear you are in, than you would make if you shifted, not at the peak. Think gear ratio's/torque multiplication.

Some people chose to shift at 100 RPM before (or at least set their shift light there) because it will take just that amount of time to shift.

[DakotaKid]

Quote:

Originally Posted by Akuma Hence the general problems with TD. com.

Keep in mind that you are referring to a problem with people in general and not a problem with TD.com as a whole.
Do try and keep the referrences to a minimum
Thanks
Bryan

[dynodon]

WTF does a small motor have to do with thriving on high engine speed? Nothing!

Small compared to most common V-8's smaller yet compared to 800 cu. in Mountain Motor . You should know the smaller the displacement the higher the RPM range for peak power ...you can talk bore to stroke ratio or journal diameter ,under square, over square ect.... blah blah blah

Later in the IMSA program they went to 2.0 L but all the early development was done with the 2.2L