429 VS 460
429 VS 460
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
It all depends on what you're trying to accomplish.
The old saying goes: "There's no replacement for displacement".
Of course, you can wind the 429 up higher, with a bigger cam, and do the same thing a normal 460 can, but then, that same 460 can have the same work done to it and it'll outperform the 429.
Again, depends on what you want to accomplish. The extra stroke of the 460 helps in trucks.
The old saying goes: "There's no replacement for displacement".
Of course, you can wind the 429 up higher, with a bigger cam, and do the same thing a normal 460 can, but then, that same 460 can have the same work done to it and it'll outperform the 429.
Again, depends on what you want to accomplish. The extra stroke of the 460 helps in trucks.
Cargo Master
Joined: Oct 2010
Posts: 2,339
Likes: 32
From: Lost In a Pit of Despair
Personally I would take a 460 over a 429 just because of my application. The 429 was built for performance cars and can be used for light duty trucks. The 460 was designed for towing, and had a lot of low-end torque, such needed by 3/4 and 1 ton trucks
Elder User
Joined: Mar 2011
Posts: 935
Likes: 2
From: Vancouver, WA
I built a 460 for my current daily driver. Approx 460ft lbs of TQ, a scant 275HP all on 8.5:1 compression.
Had a Cobra Jet 429 in another truck and that thing got awesome gas milage! Unaffortunately I didn't hang onto the CJ engine and put a 460 into that truck after the 429 gave out. My gas milage at that point was just about cut in half. Sold the truck as the 460 was a cheap-o reman and it gave out shortly after the warranty expired.
You could go either way, but it seemed to be that if you are concerned with gas milage, the 429 is not a bad option.
Had a Cobra Jet 429 in another truck and that thing got awesome gas milage! Unaffortunately I didn't hang onto the CJ engine and put a 460 into that truck after the 429 gave out. My gas milage at that point was just about cut in half. Sold the truck as the 460 was a cheap-o reman and it gave out shortly after the warranty expired.
You could go either way, but it seemed to be that if you are concerned with gas milage, the 429 is not a bad option.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
8.5 compression and a dead cam will kill gas-mileage in any engine. The 429 probably had some decent compression, hence the great gas mileage.
For instance, going from a 2bbl 360 with horrible compression (low 8's), to a 390 with 11:1 and a Holley 750cfm carb, I went from 9-10MPGs to 15 on the highway, in the exact same truck.
For instance, going from a 2bbl 360 with horrible compression (low 8's), to a 390 with 11:1 and a Holley 750cfm carb, I went from 9-10MPGs to 15 on the highway, in the exact same truck.
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Posting Guru
Joined: Dec 2010
Posts: 1,240
Likes: 2
From: Chino Hills
Compression is free HP, but it does have to be ballanced with what the motor is going to do, and todays gas.
I wouldn't build anything less then 9-1.
I wouldn't build anything less then 9-1.
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