Hey guys, quick ques....

I have a 92 302 out of a stang with 92xxxkm on it powering my 90 F250. what's the difference in the "original" 302 that these trucks came with to the 302 outa stang??? Compression ratio???

everyone keeps telling me to dump a 351W in it, but I just want to know if this motor has potential.

Shine some light on this guys! thanks!

 

The 302 HO has a different cam & the 92 will have forged pistons , thats the main difference from the truck motor , both i think are 9.1 comp , the 302 works great in mustangs & will work good in a light truck , the 351 has more TQ & will work better in a heavy truck .....Lew

 

So..by the end of the day....swap in a 351?

90 F250 single cab, long box doesnt quite fit in the light truck category...hahahaha

thanks for your knowledge Lew, appreciate it.

 

The heck you say

 

oh god. you definatly need to swap a 351W in it. is it 4x4? if so then hands down 5.8L.

 

Yes sir it is 4x4. I'm new to all this, that's why I ask these questions which may seem stupid to some. But I come on here for support and to recieve the respectable knowledge from others in hopes to learn how to construct a decent truck. I bought the truck with this motor in it....

 

what do you mean??

 

You could stroke the 302 to a 347 , that would do better than a 351 , but thats alot of work ....Lew

 

On paper the 351 doesn't look like that big of an improvement over the 302 because the HP numbers are close. The big difference is the RPM for peak power, where you get peak HP out of the 351 at about 3,500RPM but with the 302 you'll need to spin it closer to 4,500RPM to get all its power. You really need to drive the 302 a lot harder to get it moving compared to the 351. When I replaced my 302 equipped Bronco with a 351 I told my wife to make sure she watched the speedo closely. When she came back she said, "I am sooo going to get a ticket in that truck." Not because it's really any faster but it gets up to speed with a lot less drama.

 

So all in all, 351 is a more torque based motor. Lew was saying to stroke the 302 to either a 331 or 347, but that equals massive oil consumption and shortened life expectancy. More for the race application it seems as tho. It's a catch 22 for more power!! my pockets aren't deep, so i guess I'll ride the 302 out for a little while. Its a strong motor, pulls hard and does what I need it to do right now, so I am content. I'm just trying to get some ideas and knowledge before a take that big of a step in the future. I plan on using it as a daily driver, some fun on weekends, camping in the summer, and laugh through the winter.

I just wish ppl would give me more ideas on what I CAN do with a 302 for more giddy up rather than taking me as a joke and telling me I need a 351....

 

Can you say a little more about the swap? Are you still running the speed density fuel injection? Do you have a carb swapped on?? Any thing like that?

 

No swap, just stock 302 right now. I'm trying to get ideas of what i can do with the 302 for some more power and more info on swapping in a 351.

 

i would disagree with the oil consumtiion think that was a old 347 problem that has for the most part been fixed on all the new 347 kits. As far as life expectancy i dont think a 331 would live any less than a 302, the 347 however i think would not live as long due to the short skirt and the piston rock. On a normally asperated 347 i have about 40,000 miles with no major problems so far it uses about 1 qt between oil changes with no smoke.

 

I've worked on 302's for many applications and I have never been disappointed by one in either a car or a truck. True the 351 will give you an easier pull up to speed and haul a better load, but for everyday driving the 302 will do just fine and burn less gas.

Since it is a 92 5.0 it will NOT have forged factory pistons...last year for that in the HO motors was 91. It has E7TE truck heads and a roller cam. Are you running the truck intake or the 5.0 HO intake? I'll throw some modest ideas out working on some assumptions...basically the assumption that it is a 92 Mustang 5.0 from the oil pan rail up through the upper intake.

I would say swap to the longer runner truck intake, which should give some more low end power, and swapping to a different cam might not be a bad idea. I think the B303 cam is supposed to be decent for heavier vehicles...or look for an RV spec cam, but I would try and stay with a roller cam since that is essentially free HP. A tubular non-cat Y-pipe and a cat-back would round things out too. All told you won't improve peak numbers by much (if anything) but it should improve the feel.

If you are running a tranny with OD a gear swap might be a nice change as well. Let the higher rev potential of the 302 work in your favor.

 

yes, its running the truck intake.

(single exit exhaust) I just got my exhaust done temporarily for emissions purpose. I'm from BC canada so we have what they call "AIR CARE" (nightmare) It currently has stock (I think) headers right down to the end of the secondary cat (3") then reduced to 2.5" to the exhaust and out. THEN I look at the registration papers to find that it's classified as a commercial type vehicle meaing....I don't have to go through emissions inspection!!! Hell I could run open headers for all they care!!

So now my question is.... should i cut out my stock cats? ( if that's what you meant by tubular non-cat ) Being under the impression I had to go through air care I left the cats in ( automatic fail without them )

it's a 5spd, couldn't tell you what tranny that is to be honest....