Crossfire Coupe A place to discuss Coupe specific topics.

Performance: Auto vs. Manual

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  #21 (permalink)  
Old 03-30-2004 | 10:26 PM
James Sonne's Avatar
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It's not a matter of being faster with the clutch, it's a matter of the transmission being simpler than automatic planetary transmissions and thus being able to provide more throughput for the engine to the wheels. And the automatics are HEAVIER, which means that, aside from less power being put to the wheels, more power is needed because the mass of the car is increased.

In a manual tranny, one gear is connected to the clutchplate which is connected to the flywheel which is connected to the engine. In an automatic every single gear is connected to the flywheel 100% of the time, it's just a matter of the transmission switching the output path. Not only that, but the power also has to filter through the torque converter. A manual car is a straight through design, engine to wheels. Automatics are so complex and large that the power is routed through many different gears and filters before getting near the axle. Automatic tranny automatically means the car has lost 10% of its horsepower.

Whether you desire the luxury of an automatic car is not the question, neither is it in question that WMichaels scored 5.7 seconds to 58mph in his automatic (I'd guess that would be nearing 6.3 seconds to 60mph, just a guess). That seems plenty fast enough for me. You cannot argue that an automatic transmission of the planetary kind (featured in the Crossfire) is more efficient, let alone faster, than a manual transmission. It couldn't possibly be, just look at the gearing ratios! The manual stock will probably hit 60mph in 6 seconds flat with the incredibly tight first gear and second gear ratio.

Now, if they offered a sequential clutchless manual in the Crossfire that would be killer. Unfortunately, they do not. Here's to wishing that they'll have one in the SRT-6. THAT would justify the higher price tag.
 
  #22 (permalink)  
Old 03-31-2004 | 12:29 AM
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Originally Posted by WMichaels
I will be taking mine to the 1/4 mile in June. I'll see what the 1/4 mile times are then.
Likewise... Mine's at sea level though we'll see how the car runs :twisted:
 
  #23 (permalink)  
Old 03-31-2004 | 01:16 AM
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Now that Spring is here, my 6speed has gotten alot smoother. Plus 800 miles on the Odometer may have helped.

I had heard so much good about the X-fire's automatic and some bad about the stick that I was pretty sure I was going for the auto. THEN I drove both several times. I could never get the auto to do exactly what I wanted. I didn't find the touchshift to be intuitive at all. At any speed besides sedate I found the power-on to be lurchy.

Then driving the stick I found it to be better than I expected. Sold.

Driven by someone good with a manual, it's faster than the auto BUT the auto is always the same 0-60....just mash the gas. Against a slower manual driver I'd bet things are about even.

Honestly tho, the X-fire isn't even about 0-60 so transmission choice is just a matter of preference.

Dallas
 
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Old 04-01-2004 | 12:03 AM
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I choose my Crossfire with Automatic because of the Luxury side of Crossfire, either is preference and I would still like to hear of an Auto and a Manual Crossfire racing (with equal good drivers) and see the results. Whether or not Auto is as "fast" im burnt out on Manuals and really enjoy not shifting anymore.
 
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Old 05-20-2010 | 05:25 AM
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Default Re: Performance: Auto vs. Manual

Mine does the same thing, but it works better once it gets to higher RPM's. Its been too cold to use mine lately and I don't want to push my car too hard in sub-zero temps.
 

Last edited by firemen; 02-06-2013 at 03:19 AM.
  #26 (permalink)  
Old 05-20-2010 | 09:37 AM
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Default Re: Performance: Auto vs. Manual

a 6+ year old thread, you must have had a big shovel to dig this one up
 
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