Quote:
Originally Posted by performerrpm
im no professional but, theres alot more to the rough idle than just bad a/f ratio. sure if i take a stock 400 with stock cam and fatten up the tune for a nastier sounding idle it would be foolish, but if i take that same 400 put a lil bigger lopier cam in, after fine tuning it is still gonna have a rough idle and it wont having anything to do with air mixture it will be more due to the reversion caused by the bigger cams duration and overlap. as long as you use the right gears and converter the only real sacrafice poor life expectancy of tires poor gas mileage, and some times it could get to be a pain to drive if you were gonna try and drive it all the time. the only thing that i really see being a factor of how long will the motor last is, most people with these types of motors dont just wussy foot around in them, they run the piss out of them
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Like I said, it needs to be properly tuned to have the correct air/fuel ratio. I am not saying all large cams are bad. I have a 462 stroker with 585 hp at 6000 RPMs. It has a very large cam for a street car. I am only suggesting to the member that he does not sacrifice longevity for a cool sound. As long as he can maintain the correct air/fuel ratio for the RPM range that is used the most he is good to go. As far has him dirving the piss out of the car. That is hard to do when you are cruising the highway at 75 mph. A lot of damage can be done even at cruising speeds if you do not tune the engine correctly. Although there are many contributers to a rough idle, a poor tune should never be one of them. Why put thousands into a motor for poor performance.