Does having an auto or 5spd have any differance in rear wheel horse power? I was just pondering this while i was driving today. I would tend to lean on the fact that maybe a 5spd is a little more Efficient i ntransfering of power to the wheels. What is the truth?

 

Automatics tend to give more advantage because it is computer controlled... however, you get a more linear type of HP calculation with an automatic.

However, with a stick, you can play tricks with the shifts and such to give out more of a "sweet spot" in an engine to produce outstanding results. However, there are some woes to a stick...

1. You need to know how to drive stick.
2. You need to know how to drive stick well.
3. Lastly, you need to know when to shift, and keep yourself well within the means of the engine's "sweet spots"...

Automatics tend to take the guesswork out of shifting and driving as a whole... unless you've got a SCT/EDGE tuner... and you are messing with the computer... where as you can instantly change the way the truck shifts in a manual, because it's human interfaced.

Another downfall to most trucks with stick, is that they are long throw, with results in a much longer shift time... where as an automatic, the shift time is VERY quick... if not quicker than some people that drive stick. However, I'm sure if you implemented a short throw shifter and a good manual transmission, it would nearly be matched if not better.

However, any way you slice it, autos vs manuals in a truck really don't matter.... but I can tell you this... my manual F150 kept the same momentum with a stock '07 F150 with the 5.4l long bed 4x2 in a 0-60 mph race. Damn guy couldn't believe it. Who won?! Couldn't tell because we were neck and neck on a back country road. When we were done, I was really surprised because of all the rip-rap on these forums about how the 5 spd v6 stinks to all high heaven when compared to the v8's... since I've been there done that, I really don't care what people have to say about the 6er with the 5 spd.... that 5 speed really makes that truck move like a v8.

Mind you, he could have easily beat me if he got a CAI with a EDGE or a Troyer tune... But stock vs. stock, it's about the same.

Besides, I've got a 5 speed N/A 4.7l V8 Dakota Reg cab 4x2... that has so far beat lots of stuff... including N/A Mustangs... people have the "clueless" look on their face when they just got beat by a truck. I plan on doing a F/I S/C mod by the end of next year making it one of the fastest in it's class. Not to mention have the engine rebuilt with high precision components. But that's another item on my to-do list.

However, if you want my opinion, unless you really find joy and the fascination of driving stick, I wouldn't get it... because for lots of people, it just gets to be a LOT of work at the end of the day. And that clutch on that m5od is no light one either....

 

Not much advantage either way, once you're up to speed anyway. The auto tranny has a lockup torque converter. Under increasing load the torque will unlock and revs will increase slightly (3-4 hundred). If the engine still senses a power shortage, the tranny will then downshift to 3rd gear from O.D. This would be a more appropriate response to a fuel mileage question, though !

As for your question, I would have to guess they would be equal, or very near equal. Most dyno tests are done with the vehicle in direct gear (3rd, or drive for an automatic, or the highest non-O.D. gear for a stick). As for rear wheel torque, the stick rules ! ! !

 

There is generally less of a driveline loss through a manual than an auto.

Which means more HP to the rear wheels.

 

[QUOTE=


However, if you want my opinion, unless you really find joy and the fascination of driving stick, I wouldn't get it... because for lots of people, it just gets to be a LOT of work at the end of the day. And that clutch on that m5od is no light one either....[/QUOTE]

I dont know what you mean. My clutch is way easier than my dads 95 f250 PS and that goes the same with our 76 ford. I have never driven a truck with such an easy clutch as this.

As for power i was just curious. I have driven both an auto and my 5spd in the same year with the same mods and it just seems that the 5spd has more power. Maybe its just the fact that i have dialed in my shifting and i have a brand new tranny and clutch to be able ot do it quick. Either way i wouldn't give up my stick.

 

Hey TT;

Here's another one for ya to look over

https://www.f150online.com/forums/sh...08&postcount=4

Significant difference in driveline losses - auto versus stick - the actual figures are in thaar somewheres - you gots to read it real careful-like LOL!

Cheers
Bubba

 

Ill hit it up. Thanks for the links.

 

MGDfan... Once again you made my night. Thanks for the link. It explained what i was trying to get to. If anyone wants to read it... the inf ois in the last paragraph. The manuel lost about 12% less than the automatic did.

 

I didn't read the link but I'm going to use logic here - losses should be similar only when the automatic's torque converter is locked.

 

65hp is kinda drastic.

http://products.jbaheaders.com/asset...05f150dyno.jpg

4.6L f150 stock. 203 whp??? so it has 268fwhp????

 

How did that chart have anything to do with this?

 

Even when locked up the auto is going to take a bit more power to turn since its got more weight and internals to it than a manual. If you have it setup properly and you are really good with a stick you'll 9 times out of 10 be faster than if you had an auto. Now with trucks that gets trickier because of the length of throw, but you can still slam the gears fairly quick.

 

Hence why i can kinda keep up with your darn 5.4's RIGHT

 

The auto uses the input shaft to drive a pump. That takes more power away from the rear wheels.

JMC

 

No way in hell a stock 4.6 in a truck puts down close to 203 rwhp. NPI, PI, 07+, I dont care what it is, not going to happen.