mark22":1n6hwo94 said:
What can i do to make it run about like a v8
That's a loaded, and very vague question.
There are many 4 & 6 cylinder cars out there that can beat the pants off of a "typical" production V-8 car. At the same time, there are a lot of V-8's out there that one of our beloved I6's will never truly keep up with.
I guess what I'm saying is that you need to be a little more specific to get an accurate answer to the question.
What is the car, what engine do you have to work with, what's your general budget, and what are you trying to keep up with (what's your goal)?
That being said, a quick opinion here...
From a simplistic point of view, an internal combustion engine is really nothing more than a big "air pump" with the fuel being added to the air product it is moving to unleash the potential energy of the fuel and convert it to kinetic energy of motion. So, generally speaking, ANY engine will "run" better if you improve it's ability to flow air (its ability to "breathe").
The typical Ford I6 that we on this board are so fond of is a pretty bullet proof design as far as longevity, as most have a 7 main bearing bottom end (except the early 4-main 144 and 170's).
However, they don't breathe very well in their stock form. Improved induction and exhaust will really wake these engines up.
Will they keep up with a Z06 Corvette? Not likely, unless you put the car on a serious diet, AND go to a turbo, or blower, plus nitrous, or something along those lines.
But... A good intake and head, some porting, nice header and exhaust, a little cam action, maybe mill the head to get a little more squeeze, modern electronic ignition..., that could typically put one of these engines on par to keep up with a modern Mustang GT, unless it's in a really big, heavy car. A little "roundie" Falcon is only about a 2,400 lbs car, vs about 3,500 lbs in a new Mustang, so it only takes about 2/3 the power to achieve a similar goal.
Theoretically, if you could get 200+ HP at the wheels of one, it would give a run at the 'stang, and the torque of these engines is much better, so you could beat one if you set it up to wind properly. That is a bit of a chore, but still a realistic goal for a solid 200 or 250 that has been well thought out.
The kicker is that these are a lot easier to work on, create great torque typically, and get excellent mpg in most street applications.
Soooo... again, what are the parameters you have to work with, and what are your goals?
Mike.