Slant 6 Turbo 68Dart Project

Brandon Weaver said

Poor road manners would come from no choke, unheated intake, and very large carb on a engine that (naturally aspirated) could use half of the carb most likely. Also, poor fuel distribution may have a part in it as well. Possibly doggy off boost by means of low compression, very high geared? Bill and serj might be able to tell you more on driveability issues, I'm just spitballing with educated guesses.

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Having no choke is a big one. It causes you to have to mash the gas in the morning a lot till it comes up to a higher temp. You can't let it warm up in the driveway, you have to babysit the gas pedal so it doesn't die till it gets warm.

My carb is not large enough that it makes an effect on drivability when off boost. If anything the car drives pretty normal while under vacuum, and I am personally running a much lower boost rating, at only 8-10lbs. I still maintain close to 15-16mpg out of it if I just drive around normal.

The other thing with road manners and driveability is the constant monitoring. You can go drive your NA slant around and just do whatever, but with a turbo, you're constantly checking AFR, RPM when boost is on, etc... so there's no relax and drive, and if you say you can just drive it - I am calling your bluff. Take all the monitoring gauges out and drive it. You can't.