: nubby engine question
03-23-2009, 10:23 PM
Ok lets say theres a 3.5 liter V6 engine and a 3.0 V6
and they are somehow made to produce the same horse power and torque
Since they both have the same horsepower and torque, is there any advantage the 3.5 has over the 3.0?
03-23-2009, 11:14 PM
worse gas mileage?? lol, maybe there are more performance upgrades for the 3.5 that are better, i dunno.
03-23-2009, 11:32 PM
there's no replacement for displacement.Lol that's all I can think of.
03-24-2009, 12:43 AM
the gas thing and the no replacement for displacement was what I was thinking
but those arent plusses and the displacement isn't doing much..
03-24-2009, 01:42 AM
i would think if a 3.5l V6 and a 3.0L V6 made, lets say 250hp and 250 lb-ft of torque, the 3.0L would make these stats a little higher in its rev band than the 3.5L and that the
3.5L may be a bit more punchier off the line but the 3.0L would be a little more high strung. this is just crazy darryls theories tho theres no math or anything to back it up
03-24-2009, 02:06 AM
nubby nubby nubby nubby nubby....
the high revs of the smaller engine would make it less pleasant to drive on the street. needing to rev it higher means you will not save much gas... it depends on the vehicle, but all other aspects of the two cars were equal i think the larger motor would be better all around, and possibly more efficient since it would not have to work as hard as the smaller motor.
03-24-2009, 02:19 AM
Peak numbers are the worse numbers to compare. It's the area under the curve that matters ;) For all we know the 3.5 might make twice the low end torque of the 3.0 and have a fat and flat torque curve. The 3.0 could just be a peaky high rev motor and barely clear those numbers at redline.
So, if I haven't confused you, it's more about the whole picture, not just the peak numbers.
03-24-2009, 02:58 AM
^^ thats what i was thinking
03-24-2009, 06:05 PM
yep I get that part about not just the peak numbers
So if there would be a 4.0 V8 and a 4.0 V6 < what about that?
03-24-2009, 06:29 PM
^^^ Now I need to think really hard because of it.
Got to think of Power to Weight, Breathing, some other things I can't remember of the top of my head.
03-24-2009, 08:03 PM
i would bet the 4.0 v6 would make more torque
03-24-2009, 08:07 PM
wouldn't the 8 make more?
03-25-2009, 01:00 AM
thats a relatively small displacement V8 so if it does make more torque, it probably wouldnt make much more. the 4.0L V6 i would assume has a long stroke which helps with torque
03-25-2009, 01:22 AM
do you have some actual motors or vehicles to compare or is this all theoretical?
03-25-2009, 02:15 AM
I would like to know what the OP is trying to figure out/learn. The engines have so many variables and power bands can be shifted around so honestly, who knows. Guessing what has more TQ is merely a guess unless there is more eveidence to support otherwise. If you put them in a car with a drivetrain you can manipulate their power delivery even more through the use of gearing, so...
Which makes more torque...4.6L 2V Centri 500HP or 4.6L 4V Roots 500HP......
Take the same two motors:
4.6L 2V Centri+ Nitrous 600HP
4.6L 4V Roots+more boost 600HP
Hint...my sig might help.
03-25-2009, 09:14 AM
its all theoretical
I don't think I've ever heard of a 4.0 V8
I think the smallest I've heard of was 4.6
But I'm trying to figure out the difference between a larger displacement motor with a smaller displacement motor that when put into a car generates about the same hp and tq
03-25-2009, 10:52 AM
BMW, LR, Jag, GM... all have had or do have a 4.0L V8 in their lineup. Typically, stock for stock, in the same car, larger displacement almost always equals more torque. If you are looking at the 4.0 V8 versus 4.0 V6, saying that if they both generated the same HP and toque, the only difference I could see would be the powerband and where each motor creates their power. The motors would be most likely equally as fast as you would keep each motor in it's respective powerband by shifting. One would be stronger down low and one up top. Again depending on the cams, cylinder head design, exhaust, tuning, etc...