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08-31-2006, 10:45 AM #1
So what are they saying about GM's I5?
I'm thinking about one of the Canyon pick ups but the engine kinda worries me. It's an inline 5 / 3.4L and I think a fairly new design. I'd get the 4x4 but mostly use it like a car. Occasionally pull a trailer between 3500 & 4000 lbs. I know that's the max for that truck but since it wouldn't be that often I wonder if I'd get away with it and not kill the motor?
Anyone gots some real life experience they can share? TIA.
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08-31-2006, 10:59 AM #2
i bet it would be killer for a blown application. Ive been kicking that ide3a around quite a bit actually.
inline engine bottom-ends are just naturally stronger, because every cylinder has a main journal on each side.
they just sound so ridiculous, though.
sarge... what did the old buick straight 8's sound like?
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08-31-2006, 11:01 AM #3
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08-31-2006, 11:06 AM #4
I dont understand why even tiny little v8s sound so good, but everything else sounds like how the inside of a dead skunks ass on fire smells.
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08-31-2006, 11:36 AM #5
- Join Date
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I own a 06 Colorado Crew cab. The engine is a bit underpowered. Has some low end torque but dies after 55. All in all it is a good truck and pretty roomy inside. I get 17 mpg town and 21 - 22 hwy.
02 TA A4
408ci - 244/250/612/622 | PRC 237 heads | FTRA |100mm lid | FAST92/92 | Kooks 1 7/8 | Hooker CB | DMH Cutout | built trans | Yank4000 | 412 motorsports tuned | stock rear:judge:
08 TBSS - Borla CB
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08-31-2006, 04:52 PM #6
A friend has one and it isn't much for towing. Its a good truck, just not enough power to haul very much.
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08-31-2006, 05:34 PM #7
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08-31-2006, 06:06 PM #8
only v8s sound good
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08-31-2006, 06:16 PM #9
this is about the most interesting shit ive read all week
The 5-cylinder engine's advantage over a comparable 4-cylinder engine is best understood by considering power strokes and their frequency. A 4-cycle engine fires all its cylinders in every 720 degrees — the crankshaft makes two complete rotations. If we assume an even firing engine, we can then divide 720 degrees by the number of cylinders to determine how often a power stroke occurs. 720 degrees ÷ 4 = 180 degrees, so a 4-cylinder engine gets a power stroke every 180 degrees. A V8 engine gets a power stroke every 90 degrees, (720° ÷ 8 = 90°).
A given power stroke can last no more than 180 degrees of crankshaft rotation, so the power strokes of a 4-cylinder engine are sequential — no overlap. At the end of one cylinder's power stroke another cylinder fires.
In a 1-, 2-, or 3-cylinder engine there must then be times when no power stroke is occurring. A 3-cylinder engine gets a powerstroke every 240 degrees, (720° ÷ 3 = 240°). Since a power stroke cannot last longer than 180 degrees, this means that a 3-cylinder engine has 60 degrees of "silence". No power stroke occurs, there is no overlap.
A 5-cylinder engine gets a power stroke every 144 degrees, (720° ÷ 5 = 144°). Since each power stroke lasts 180 degrees, this means that the power strokes have some overlap and the engine is smoother than a non-overlapping 4-cylinder engine.
A 5-cylinder engine also gains smoothness over a 4-cylinder engine because there is not a moment in a 5-cylinder engine when all pistons reverse direction at the same time. A typical inline-4 has the center pistons rising and falling together and the outer pistons rising and falling together. When pistons #1 and #4 are at top dead center (TDC), #2 and #3 are at bottom dead center (BDC).
Every cylinder added beyond five increases the overlap of firing strokes and makes for a smoother engine. An inline-6 gets a power stroke every 120 degrees. So there is more overlap (180° - 120° = 60°) than in a 5-cylinder engine (180° - 144° = 36°). However, this increase in smoothness of a 6-cylinder engine over a 5-cylinder engine is not as pronounced as that of a 5-cylinder engine over a 4-cylinder engine. The inline-5 has a frictional loss edge over an inline-6, it uses fewer parts, and it is shorter so it fits under the hood better.
The 5-cylinder engine is longer and more expensive to manufacture than a comparable 4-cylinder engine, but some manufacturers feel these costs are outweighed by the 5-cylinder engine's greater smoothness.
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08-31-2006, 07:30 PM #10
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- 2010 Camaro rs/ss
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08-31-2006, 08:26 PM #11
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09-01-2006, 10:10 AM #12
That's a good read but I'm not so sure I should be concerned about how smooth it runs if I'm pulling a 4k trailer which is the max the 3.5L is rated for. Even if it's only occasionally. Lugging is definitely not a good thing. If it's only been out for 2 years maybe it's too soon to know if it's a POS. (remember the quad four?) Maybe I should just go with a full size and a V8 and be done with it.
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09-01-2006, 10:27 AM #13
Here's what a P-51 Mustang V-12 Merlin sounds like. I don't think it sounds bad at all.
http://www.coastcomp.com/av/fltline2/sounds/merlin.wav
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09-01-2006, 12:13 PM #14
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