302 vs. 351w

itbrokeagain · 08-28-2007, 12:12 AM

Right now I have a 302 from a 86 Cougar in my Jeep. I recently aquired a 89 F-250 in very very rough shape but with a 351w with 60,000 miles.

I cant decide if it would be worth it to stick this in my Jeep. Will I have to change the wiring harness? I didnt look too close at it but it doesnt look the same.
Any input? Im not real familiar with the 351. Will I see big power gains?

xj-up · 08-28-2007, 12:20 AM

I'm not a Ford man but, I would stick with the 302. There are endless power bolt-ons for the 302 5.0 motor. I don't think bolt-ons are the same as 351W.

sarge · 08-28-2007, 12:20 AM

Tony ,
Is there something wrong with your 302 ? Sounds like alot of work just to gain a few pony's in an off road vehicle....

JET455 · 08-28-2007, 12:25 AM

Quote:

Originally Posted by sarge

Tony ,
Is there something wrong with your 302 ? Sounds like alot of work just to gain a few pony's in an off road vehicle....

Im with sarge leave it be if it works.

94Dodge Truggy · 08-28-2007, 08:08 AM

351 is heavier also and would put more stress on the driveline. Not worth it.

carwash · 08-28-2007, 10:25 AM

i'd say your 302 is prolly as strong as the truck motor. the truck motor was probably worked way harder than your current motor in it's original vehicle.

and the bolt on stuff is endless for the 302.

what you need is some exhaust tony... they make kits for the 302 that make some serious power... and it would sound a little better too... ha.

itbrokeagain · 08-28-2007, 11:22 PM

Well the 302 is coming out regardless. I run around 1 psi on oil pressure. Thats with straight 40 oil. With 10w30 the guage barely ever came off the needle. And yes I tried a new guage and that didnt make a difference. Oil pressure only registers if the engine is revved and the engine is very very sloppy. It is not making near the power it should. The 302 is actually a 78 with 86 fuel injection. But I have a 302 from a 94 Grand Marquis with about 90,000 miles as well as the 351. And heck I have a 460 also but I dont think that would be the best choice. But dont think I havent been tempted by that 460.

As far as exhaust, I think Flowmasters will give me the sound I want. The Cherry Bombs were a heck of a lot easier to fit up though.

fastford · 08-31-2007, 09:45 AM

i would stick with a 302 if you could. They make plenty of aftermarket parts for the 351 but cost twice as much as 302 parts, you would gain a slight power boost with the 351 but its not worth the price you have to pay. Just my two cents

08-28-2007, 12:12 AM	#1
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	302 vs. 351w Right now I have a 302 from a 86 Cougar in my Jeep. I recently aquired a 89 F-250 in very very rough shape but with a 351w with 60,000 miles. I cant decide if it would be worth it to stick this in my Jeep. Will I have to change the wiring harness? I didnt look too close at it but it doesnt look the same. Any input? Im not real familiar with the 351. Will I see big power gains? __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

08-28-2007, 12:20 AM	#2
xj-up Jeep XJ Join Date: Jul 2007 Location: Hamilton, Ohio Posts: 76	I'm not a Ford man but, I would stick with the 302. There are endless power bolt-ons for the 302 5.0 motor. I don't think bolt-ons are the same as 351W. __________________ 90' Jeep XJ Buggy - 5.5 custom lift, 33" TSL's, locked 01' Softail 01' Dodge Ram Cummins 3500 4X4 71' Dodge Challenger Shane

08-28-2007, 10:25 AM	#6
carwash pimpin' IS easy Join Date: Jan 2007 Location: Union, KY Posts: 3,344 Images: 605	i'd say your 302 is prolly as strong as the truck motor. the truck motor was probably worked way harder than your current motor in it's original vehicle. and the bolt on stuff is endless for the 302. what you need is some exhaust tony... they make kits for the 302 that make some serious power... and it would sound a little better too... ha. __________________

08-28-2007, 11:22 PM	#7
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	Well the 302 is coming out regardless. I run around 1 psi on oil pressure. Thats with straight 40 oil. With 10w30 the guage barely ever came off the needle. And yes I tried a new guage and that didnt make a difference. Oil pressure only registers if the engine is revved and the engine is very very sloppy. It is not making near the power it should. The 302 is actually a 78 with 86 fuel injection. But I have a 302 from a 94 Grand Marquis with about 90,000 miles as well as the 351. And heck I have a 460 also but I dont think that would be the best choice. But dont think I havent been tempted by that 460. As far as exhaust, I think Flowmasters will give me the sound I want. The Cherry Bombs were a heck of a lot easier to fit up though. __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon. Last edited by itbrokeagain; 08-28-2007 at 11:24 PM.

08-28-2007, 12:20 AM	#3
sarge Pure Bacon Join Date: Jan 2007 Location: Trenton, Oh Posts: 1,098	Tony , Is there something wrong with your 302 ? Sounds like alot of work just to gain a few pony's in an off road vehicle....

08-28-2007, 08:08 AM	#5
94Dodge Truggy EX-Vice President Join Date: Jan 2007 Location: Fairfield, Ohio Posts: 3,048	351 is heavier also and would put more stress on the driveline. Not worth it.

08-31-2007, 09:45 AM	#8
fastford Banned Join Date: May 2007 Location: Hamilton OH Posts: 163 Images: 13	i would stick with a 302 if you could. They make plenty of aftermarket parts for the 351 but cost twice as much as 302 parts, you would gain a slight power boost with the 351 but its not worth the price you have to pay. Just my two cents