Mercury Cougar Owners banner

1 - 11 of 11 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter #1
i have question to the 460 engine.
as far as i know this engine came up 1972 in the Thunderbirds and
in Lincolns .The factory specs were: Net hp : 224 bei 4400 RPM.

the seller claims that the engine has been modified up to around
450 HP which is quite a big PLUS. The compression is 12.5 : 1 .

Can this engine be stable?? How much improvement can this engine handle without wrecking down after a few miles.

thanks for any help.
 

·
Registered
Joined
·
1,832 Posts
1972 hp ratings were at the rear wheels. 450 hp for a 460 is easy to get. 12.5- 1 compression is too much for the street, for get about it. mm
 

·
Registered
Joined
·
246 Posts
They sell crate engine 460s that are pulling 600hp +

Lots of power out of those big displacement ones
 

·
Registered
Joined
·
3,141 Posts
72 was the year that they down graded the 460 by lowering compression (raised the deck height .020") and retarded the cam.
A healthy streetable 9.5:1 with a straight up cam and 4bbl should get into the mid 400 HP range easy. It's basically just a big-A Cleveland.
:p:
 

·
Contributing Sr Motorhead
Joined
·
5,470 Posts
429/460

Rktmn,

Actually, the 460 did no come into being until 74 IIRC. Before that, it was 'only' a 429. By the way, just for what it is worth, the 429 came out before the Cleveland. The 429 made its debut in the 68 Thunderbird, a full two years before the true Cleveland, but only one year before the hybrid small block Boss 302 that, of course, used Cleveland-style heads. The 460 is just a stroked 429. If you get a 460 crank and pistons, you can turn a 429 into a 460.

Also, they did not retard the cam in the 429/460s like they did in the Clevelands. They used a retarded timing set, and that retarded the cam. To get power out of the later 429/460s, put in an early 429 timing set that is the 'straight-up' variety, and you're good to go.
 

·
Registered
Joined
·
2,691 Posts
Re: 429/460

Cougrrcj said:
Rktmn,

Actually, the 460 did no come into being until 74 IIRC. Before that, it was 'only' a 429.
The 460 was available in Lincolns and Continental Mark IIIs as early as 1968 1/2. I have one in my 1971 Mark III.

Tim B
1969 XR7 428 CJR convertible
http://members.aol.com/timbrands/index.html
 

·
Contributing Sr Motorhead
Joined
·
5,470 Posts
429/460s

Ahhhh, those danged Lincolns will trip you up every time! I knew that Lincolns had that weird 462 earlier, but I didn't know about 460s. I stand corrected. This goes to show that you're never too old to learn something. My reference book just lumps the 429 and 460 together so I had ASSumued that the 460 didn't come out until the 429 was killed off. We all know about ASSumptions, don't we! :p:

Also, I had to go back to my reference book on the 335/385 series engines, and confirmed that the 429/460 deck height was 10.300 for 68-70, then in 70-1/2 they added some height to 10.310. For 72-up the deck height was 10.322. Also in 72 came the introduction of the open chamber heads for the 385 series (429/460). The chamber volume for the heads was 75.8cc for 68-71, then 91.4cc for 72-73, then 96.2cc for 74-up. The combustion chamber volume in the head was the biggest factor in lowering the compression ratio in 72-up.
 

·
Registered
Joined
·
1,832 Posts
Didn't the early Lincolins have a 430ci engine also? What engine was that based on? mm
 

·
Registered
Joined
·
1,859 Posts
Tunefish...

If he is running a 12.5 compression setup, and it is NOT an alunimum head change out, the heads have probly been milled. A common problem with LIMA's is piston/valve clearance. After hearing this I wonder just what has been done to this motor. This is one of those situations where all things are relative, and then he says about 450hp? Is that a guestimate?

My point is this; typically a LIMA that has that many aftermarket parts thrown at it isusually well over 450hp.
All this info just drew a big question mark from me...
good luck!
 

·
Registered
Joined
·
27 Posts
modifiedmark said:
1972 hp ratings were at the rear wheels. 450 hp for a 460 is easy to get. 12.5- 1 compression is too much for the street, for get about it. mm
the ratings changed to net in 72 vs gross pre 71. all ratings are at the flywheel, not at the wheels.

if that engine has the 72 heads on it( d2ve's) get rid of them! they are the worst 385 head out there. very prone to detanation. they only used them in 72 and got rid of them after. also and iron headed engine w/ 12.5 comp will probably need to be run on race fuel. my 85 t bird had a mild 460 that i built for it and it ran 12.80's in my 4000 lb(not stripped, power everything) car at the track. should have never sold that car.
 
1 - 11 of 11 Posts
Top