Quote:
Originally Posted by john5670
A properly tuned engine that has a rough idle does not have the correct fuel and air mixture at low RPMs. The rough idle is cause by poor burning of the air fuel mixture. If you cause your car to run rough to look like you have a lot of horse power, your foolish. Your giving up what your trying to advertise. Yes there are plenty of large cam street cars running around, but if they are not properly tuned to have the correct air/fuel mixture for the used power range, its only a matter of time before they need to be rebuilt. It may be 2,000, 10,000 or 50,000 miles. It won't be the optimal engine life though. Ask a reputable engine builder. I would be surprised if he recommends a poor tuned engine for a cool sound.
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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