351w hp

jeffd · 03-25-2005, 07:58 PM

I have a 351 from a 86 pickup truck and trying to find out what horsepower it is. I've been told it's an HO.Also will this motor fit my 84 stang GT?Any input would be great Thanks.

Capri306 · 03-27-2005, 09:05 PM

A high output in a 1986 Ford pickup truck?

Keep dreaming. It's probably just a standard 351W with normal compression (8.7:1 typically) and a 4-bbl carburetor. Seeing whether it's carbureted or not is going to be key to identifying whether it's truly a 351 or a 302. 302s were fuel injected that year. Another thing: are you certain it's the original engine in this vehicle?

There's really not too much to be gained installing this in an '84 Mustang unless it runs absolutely perfectly, and with very low mileage. Granted you will most likely see more torque, but unless you plan on adding some parts to make it use all of its cubic inches, I'd save myself the trouble. It's not too difficult to install a 351 into a Fox body, but it will sit higher in the engine bay, which will necessitate a cowl hood or special engine mounts. Also, the added torque of a 351 (which is a real kick in the pants) will stress teh drivetrain considerably. Therefore you may have to upgrade the transmission and rear end. To summarize, yes it will work but with caveats.

As to an actual horsepower measurement? Hmm....I believe it's probably around 170 for that year. Truck motors are made to make low-end torque, not so much in the horsepower department.

jeffd · 03-27-2005, 10:38 PM

Thanks. Motor is an 84 per the block casting numbers and pistons have 040 stamped on them. motor has new everything bearings,camshaft, valves, rocker arms etc.

Capri306 · 03-28-2005, 06:08 PM

Throw some half-decent heads on there with a matching cam & intake, invest in the drivetrain, and it may be worth it. I know if I had a transmission that wasn't blown (the AOD is shot in mine) and a running 351W, you bet I'd be stuffing it into the Mustang!

My crystal ball just got back from the shop. That's how I knew you didn't have the original engine in that truck.

Hehehehe.

jeffd · 03-28-2005, 09:08 PM

I've been told that i need different oil pan, and pick-up is their anything else oi have to do? Also the heads have everything new and pistons are stamped with 040 doesn'yt that change the compression ratio?

Ieatcamaros · 03-28-2005, 09:57 PM

It depends on what kind of pistons were put in it. Are the flat tops, dish, or domes? If it was a stock-type rebuild, they are either dish or have the 4 eyebrows in them.

jeffd · 03-28-2005, 10:04 PM

Their flat top?

Ieatcamaros · 03-28-2005, 10:12 PM

Then, they could have as much as 10.0:1 compression. But it's probably more like 9.0-9.5:1. Do they not have the "eyebrows" in them?

jeffd · 03-28-2005, 10:16 PM

one oppsite of each other.

03-25-2005, 07:58 PM	#1
jeffd Registered Member Join Date: Mar 2005 Posts: 12	351w hp I have a 351 from a 86 pickup truck and trying to find out what horsepower it is. I've been told it's an HO.Also will this motor fit my 84 stang GT?Any input would be great Thanks. Last edited by jeffd; 03-25-2005 at 09:53 PM..

03-27-2005, 09:05 PM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Re: 351w hp A high output in a 1986 Ford pickup truck? Keep dreaming. It's probably just a standard 351W with normal compression (8.7:1 typically) and a 4-bbl carburetor. Seeing whether it's carbureted or not is going to be key to identifying whether it's truly a 351 or a 302. 302s were fuel injected that year. Another thing: are you certain it's the original engine in this vehicle? There's really not too much to be gained installing this in an '84 Mustang unless it runs absolutely perfectly, and with very low mileage. Granted you will most likely see more torque, but unless you plan on adding some parts to make it use all of its cubic inches, I'd save myself the trouble. It's not too difficult to install a 351 into a Fox body, but it will sit higher in the engine bay, which will necessitate a cowl hood or special engine mounts. Also, the added torque of a 351 (which is a real kick in the pants) will stress teh drivetrain considerably. Therefore you may have to upgrade the transmission and rear end. To summarize, yes it will work but with caveats. As to an actual horsepower measurement? Hmm....I believe it's probably around 170 for that year. Truck motors are made to make low-end torque, not so much in the horsepower department. __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

03-27-2005, 10:38 PM	#3
jeffd Registered Member Join Date: Mar 2005 Posts: 12	Re: 351w hp Thanks. Motor is an 84 per the block casting numbers and pistons have 040 stamped on them. motor has new everything bearings,camshaft, valves, rocker arms etc.

03-28-2005, 06:08 PM	#4
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Re: 351w hp Throw some half-decent heads on there with a matching cam & intake, invest in the drivetrain, and it may be worth it. I know if I had a transmission that wasn't blown (the AOD is shot in mine) and a running 351W, you bet I'd be stuffing it into the Mustang! My crystal ball just got back from the shop. That's how I knew you didn't have the original engine in that truck. Hehehehe. __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

03-28-2005, 09:08 PM	#5
jeffd Registered Member Join Date: Mar 2005 Posts: 12	Re: 351w hp I've been told that i need different oil pan, and pick-up is their anything else oi have to do? Also the heads have everything new and pistons are stamped with 040 doesn'yt that change the compression ratio?

03-28-2005, 09:57 PM	#6
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: 351w hp It depends on what kind of pistons were put in it. Are the flat tops, dish, or domes? If it was a stock-type rebuild, they are either dish or have the 4 eyebrows in them. __________________ The sig says it all.

03-28-2005, 10:04 PM	#7
jeffd Registered Member Join Date: Mar 2005 Posts: 12	Re: 351w hp Their flat top?

03-28-2005, 10:12 PM	#8
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: 351w hp Then, they could have as much as 10.0:1 compression. But it's probably more like 9.0-9.5:1. Do they not have the "eyebrows" in them? __________________ The sig says it all.

03-28-2005, 10:16 PM	#9
jeffd Registered Member Join Date: Mar 2005 Posts: 12	Re: 351w hp one oppsite of each other.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
351W Heads on a 87 302 Block	NitroNixon	Windsor Power	5	05-08-2003 09:29 PM
351w or 347 stroker? which is better?	BLACK85GT	Windsor Power	55	12-21-2002 06:52 PM
351W heads on 289 stock engine	sleeperstang	Classic Mustangs	5	11-21-2002 08:35 PM
Where to find 351W SVO	GodStang	Windsor Power	0	10-11-2002 02:04 PM
351W in a Fox body	greydan	Windsor Power	4	07-03-2002 02:33 PM