You must be talking to an old time gear head. The reason he is saying 6000rpms is because the engines back in the day were larger and made more low end torque. Todays engines are less cubes with shorter strokes and because of that they pull to 6500-7000. But that is also why automatics today are 5 to 7 speeds with a 4.xx rearend gear instead of a 3 speed with 2.xx gears. They need more gear because they don't have the same grunt.
You will never be able to define a street engine because it's all a matter of opinion and what someone is willing to put up with. Lets use the 91 octane limit as an example. Most people will say that a street engine has to be run on 91 but what about the person who's willing to run their car on C16 all the time? Let's say that this person drove his car back and forth to work everyday but you didn't know what fuel he ran. By just knowing that he drove it everyday to work would you say his car is a street car? How about after you found out that he ran C16? Would it be any less of a street car?
|