HEY GUYS I HAVE A 1977 F-100 SHORT/WIDE. I AM GOING TO PUT A 302 IN IT. I WAS WANTING TO GET 450-500 HORSEPWER OUT OF IT WITH STRAIGHT ENGINE.
I DONT WANT TO BLOW IT OR SUPERCHARGE IT.IS THAT POSSIBLE?? IF NOT HOW MUCH CAN I GET.

THANKS,
AARON

 

Hey Aaron if Robert Yates can get 750 hp from a 351, you should be able to get 500 from a 302, no problem.

 

Umm, your not gunna get 500hp out of a 302 naturally. You can run a twin-turbo setup, a supercharger, nitrous, and build the engine to match, but your under ANY circumstances, going to get 500hp out of a simple 302!

robert yates can get 750hp out of a 351 (seriously? never heard this before) but remember it's a RACE engine. No idle, no MPG, and I doubt that it'd last very long on a street situation..Chevy, Ford, Dodge, I don't care what it is, your never gunna push 500hp out of a 302/305/318 without help.

 

What are you going to do to the engine? $$ wise? your going to spend alot getting 350-(and at most)400hp out of a 302. I would so stick to 350hp as a goal. You can get it reliably, and still have low-end torque.(your still going to spend a bit though..)

Matt

 

not being a small block expert I cant say for sure but I can say this. HP ratings unless proven on a "Dyno" are wild guesses at best. I have been building FE race motors for years and allways figured I was pushing 500 plus on various motors. A few years ago I built a 427 using a 428 CJ crank and used 427 med riser heads with the larger SCJ valves. This motor runs a .655 lift solid lifter cam and is a "race motor" . No way I can drive it on the street normally. It idles at 2000rpm, redlines at 8000rpm and I had guessed it to be well over 600hp. After freshing it up a couple years ago I decided to Dyno the motor, and I have 522hp at 6200 and 596lbs. tq., at 5700rpm. The motor has 455 cu. in. 13:1 runs a custom 1100cfm carb., on 106 fuel. I learned alot about true hp then and I would venture to say that it would be difficult at best to get near 400hp out of a naturaly aspirated 302 for racing let alone a street ride. Also remember there are two seperate ways of measuring power. Since I think 72 or so the common method was rear wheel. You would be surprised how much you loose through your running gear. If its power you want I would stick with 460s. There is no cheaper way of building HP than with cubic inches. Rick

 

>not being a small block expert I
>cant say for sure but I
>can say this. HP ratings
>unless proven on a "Dyno" are
>wild guesses at best. I have
>been building FE race motors for
>years and allways figured I was
>pushing 500 plus on various motors.
> A few years ago I
>built a 427 using a 428
>CJ crank and used 427 med
>riser heads with the larger SCJ
>valves. This motor runs a .655
>lift solid lifter cam and is
>a "race motor" . No way
>I can drive it on the
>street normally. It idles at 2000rpm,
>redlines at 8000rpm and I had
>guessed it to be well over
>600hp. After freshing it up
>a couple years ago I decided
>to Dyno the motor, and I
>have 522hp at 6200 and 596lbs.
>tq., at 5700rpm. The motor has
>455 cu. in. 13:1 runs a
>custom 1100cfm carb., on 106 fuel.
>I learned alot about true hp
>then and I would venture to
>say that it would be difficult
>at best to get near 400hp
>out of a naturaly aspirated 302
>for racing let alone a street
>ride. Also remember there are
>two seperate ways of measuring power.
>Since I think 72 or so
>the common method was rear wheel.
>You would be surprised how much
>you loose through your running gear.
>If its power you want I
>would stick with 460s. There
>is no cheaper way of building
>HP than with cubic inches.
> Rick


I COMPLETELY agree with you...However I do think you can get 350 streetable hp out of a 302 as long as you have your stall set up right and are willing to deal with some stuff..

But on the ACTUAL vs. IMAGINED hp thing, your dead on. I Think Car Craft or one of those magazines did an article on that this month...Most people thought they where pushing 350-500hp, and most actually had 250-350 rear wheel hp..

 

Geez guys, thinking about horsepower at the wheels I don't really know 302 numbers, I had a 302 in my truck but it was not particularly built, just edelbrock dualplane manifold with 600 cfm carb. I doubt it had very high Hp it was adequate. But I do also drive an 89 Camaro RS with TBI injection 305 5sp 3.08 gears. I know that it is not the hottest setup but it preety dammed spirited and very capable of getting me in trouble. Its factory ratings are 170@4400 rear wheel w/ 255lbs @ 2400. The 89 Iroc with 350 TPI and optional 3.27 gears is 240@4400 w/ 345@ 3200. Certainly stock motors can be built for more HP but 300-400 sounds very healthy to me. Are we talking rear wheel HP?

 

I fixed up a 76 F100 with 300 3sp power nothin' a year and a half ago. I had a 302 that I wanted to use (it had about 40K and had been in my Dads Ranchero). I swapped the 302 in converted to smallblock C6 (junkyard purchase not rebuilt) and upgraded to power steering, edelbrock performer manifold and carb (600cfm) and had custom 2-1/4" dual exhaust fabricated with a crossover and "Pro Flow" high flow mufflers. It sounded great but was adequate as far as power. It came up with a bad crank that has been found to be bent. So I pondered what to do. I almost went with a junkyard 351W but got cold feet. I feel I should have the C6 rebuilt. In the mean time I bought a 69 F100 with 390 and 4 sp. My thought was to transfer the whole drive train. It ended up being a total top end rebuild. It runs good now but I want to just drive it over the winter at least. I am thinking now about just putting another 302 back in the 76 since it is already setup for it. I got the intake manifold, the exhaust is ready to go. I wouldn't have to worry about my custom made driveline fitting another tranny (4sp or FE C6). Putting either the 390 or a 351W would require spending more money modifying the exhaust, plus I would be wasting the 302 manifold I have. So....I would like ideas on building good usable power into a 302. I don't want to spend huge bucks on things like steel crankshaft. I thought about the Crane roller tappet conversion but I'm told it's about $700 to convert. I have 85 302 heads now. I thought that I'd get a smaller carb (I used the 600 on my 390) like maybe the 500cfm Edelbrock or Carter AFB. RV cam (suggestions? I had a stock 351W cam in before) Heads? I thought about Edelbrock or TrickFlow Aluminum Head for around $1000 but the speed shop I go to now thinks they are "cheesy". They like World Products Iron heads for around $500. Or maybe just mild porting to my stock 85 heads. I have been steered away from headers in favor of my stock exhaust manifolds. I believe the pass side is a 289 manifold originally in the Ranchero, the driver side came from a 302 truck. Smaller for better low end torque. I have been critisized for using a C6 for it being too heavy and too much burden on the 302. What about torque converter, I just used the junkyard one before, what should I consider here? I am thinking of buying a short block and making good choices from there to have a better more powerful engine than I had before.

 

Matt I thought that answer went with the question well didn't you?

Robert Yates engine usually are very good for 500 miles, and they are natural.

John

 

Ever consider a 500 CAD engine?

 

>HEY GUYS I HAVE A 1977 F-100
>SHORT/WIDE. I AM GOING TO PUT
>A 302 IN IT. I WAS
>WANTING TO GET 450-500 HORSEPWER OUT
>OF IT WITH STRAIGHT ENGINE. I
>DONT WANT TO BLOW IT OR
>SUPERCHARGE IT.IS THAT POSSIBLE?? IF NOT
>HOW MUCH CAN I GET.
>
>
>
>THANKS,
>
>
> AARON

Aaron,

I am running a 302 in my pro mud truck and it dyno'ed in at 468 hp at 7200 rmps. (No blower or nitro) It is possible to get the type of horsepower that you are looking for with just a little work. If you are looking to keep the cost down and not run after marker heads (which helps alot), I would find a set of 351W heads and bolt them on to your 302. (no mods required) My 302 is punched out 60 over, has forge pistons and rods, after market heads, roller cam and lifters,it has been balanced and has a fluid damper, and a dual plane intake with a Carter 750 cfm carb. Drop me an email if you would like more details about how to get that many horses out of your 302.

Kyle

 

I was thinking about buying a new motor, and getting at least 300-400hp out of it preferably 400, I want a 351M, could anyone tell me what I could put into one, for about $2500-$3000

 

You can get whatever you want with money. But when you start adding 351W heads and the like it's no longer a 302!

 

 

From 1978 on, the stock iron heads were identical between 302-351W. At least for awhile. Not sure about the late 80's-90's