327 vs 350
ok wich motor should i go with i was wanting to do a 355 but i have a chance to get a 327 with aluminum intake rv cam hei and short water pump. as far as fuel mileage? which will be better also can i put vortec heads on the 327 i can get a set pretty cheap? will everthing i have right now with my 305 bolt up? and what kind of power would i be looking at fort the 327?
also will i see a difference from my 305 with aluminum intake and headers? if i go with 327 |
Re: 327 vs 350
There is a lot more to the question than the number. The 302, 327 and 350 all have 4" bores. The stroke length is what changes the displacement. Generally, shorter stroke will will be quicker. Longer will have more horsepower. Although either can be good, 350 is probably better for our trucks and is more common. If I was building a light car for the drag strip the 327 or 302 might get preference.
Spend your money (and you can spend a lot) on heads, carb, intake, exhaust. That is where the magic happens. With the right stuff bolted on, either of the motors can make gobs of power. By the way, I choose option "C". I am keeping the 305. It is limited but more than enough for my needs. Most of the bolt-ons will move from the 305 to the other motors. |
Re: 327 vs 350
Is the 327 out of a passenger car or out of a truck? That will make a big difference in terms of power. See if it has a "High Perf" stamp on it. If it does, I'd go with that over a truck 350. That only applies if the 350 isn't stamped "High Perf," then I'd go with that one. In an old truck, cubes are your friend. To get one of these old bricks moving, you need low end (which you won't find much of in a 302, but the 350 should be plenty). Go as big as you can IMO, providing they're all equally built.
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Look at it this way, if you get 1 hp per CI (which is pretty easy) you're ahead by 22 HP and FT-LBS just by doing the 355... |
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Re: 327 vs 350
The shorter the stroke, the faster it revs up!
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Re: 327 vs 350
...its all about the cubes.
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If you are asking about a late model 5.3(327) I would go that route;)
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Go big.
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Bottom line, ALL else being equal, more cubes ALWAYS=more power
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There's no substitute for cubic money.
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My main point was that what you do to the motor is a lot more important than the 327/350 starting point. |
Re: 327 vs 350
327 will rev higher but not faster. Bottom line is TORQUE. Torque moves weight. Trucks are heavy. With a longer stroke, the 350 is going to be a better choice. Heads are interchangable on both.
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I built a 327 and a 350 for my 68 Cmamro and ran the same time in the quarter mile. I think a 327 is a stronger engine. Better quality but the 350 will have more bottom end torque for a truck.
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It would be simple to build a stout 327 screamer, to walk all over a mild 350. Even in a heavier truck. I could build one on dyno sim and without to much trouble get upwards of 450 hp and make more peak torque than the mild 350.(the trade-off is that you will have to spin the smaller motor at a higher rpm) But this is not even a apples to apples comparison...it is not a secret at all that smaller cube motors can go faster than bigger cube motors ....its all in the parts combo, build quality and money. But all of this confuses the point that if two similar engines of different displacement spec out the same, or close to ...the larger motor will make more torque and horsepower, and with enough traction will push a quicker et....you simply can't get away from the cube advantage when all else is equal. It's just physics. |
Re: 327 vs 350
i could see this discussion go on and on and on and on....
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Apples to apples Comparison: if you achieve 1.3 HP per Cubic inch on both engines... this is why bigger is better 327 x 1.3 = 425.1 HP 350 x 1.3 = 455 HP the 327 will not rev higher than the 350 if they are built the same. the 327's torque peak will be a few hundred RPM's Higher, but will not Rev Higher |
Re: 327 vs 350
i could see this discussion go on and on and on and on.... LOL. I really don't think you'd notice much difference between the two. A 400 on the other hand you would notice the difference in cubic inches. This aint my first rodeo.
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Re: 327 vs 350
Theres a reason everyone puts a 350in man. Fords volkswagons everything. Chevy350is what started it all. Put a 350in. With 350th trabs and itll last anoter 30 years. I could b wrong with the ford data. Its been awhile lol.
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