I currently have a 1975 f250 4X4 4 speed with a 360. The intake manifold is a stock 2 barrel, I have an adapter installed to go to 4 barrel so I can run the edelbrock 1406 4 barrel carburetor, If I install an edelbrock 2105 performer intake, will I increase my torque enough to notice? I need more low end torque, if I lug it down too much it doesn't have enough power to pull a steep hill at low speeds like 5 miles per hour without putting it in granny gear. Thanks for any info

 

You are not going to gain a benefit from the carb unless you do the intake as well. Believe me, including the intake in your swap will blow your mind. When I did mine I didn't gain all that much low end, but the top end was amazing. I gained power from about 1500 rpm's to redline I would say.

 

OK, I know I need the intake, I'm kinda cheap and the intakes are kinda spendy, I have been looking for a used one but they are few and far between' for the 360 motor, mostly chevy stuff available, I will save up some money if I can in these troubled times and buy a new one. Thanks for your reply

 

If you are looking for low end why do you want a four barrel.

 

my original carburetor was a two barrel, real old and covered with sludge, my neighbor gave me a brand new edelbrock carb off of a project he was building and didn't need, he couldn't return it cause he already ran gas through it, then he wanted a demon style carb, it was extra, so I figured why not? the price was right.

 

Remove the carb and put a rebuilt FE in 390, 410 or 445 size under it.

The 360 isn't going to make much more low end than what you have without serious work. As per the previous post, you can run them up a bit more with a bigger carb, but the other issues with the engine are going to limit what you can do without major wrenching.

 

How about a lower gear ratio? Better off with a good 2 barrell, right carb spacer and lower gears. A lot less work and $$$. Dont know what exhaust you have but a well designed 2 into one exhaust will also increase low grunt. 2 1/4 X 2 1/4 into a magna y into a 3" into a high flow muff out with a 3" tail behind the pass rear tire. Will sound bad *** too. Better than a dual for what you want. Gives you extra room for a mid tank too. When your out in the sticks it's nice to have some extra juice. Also you could go with a 4V iron mani that will flow the same, cost about 100 but it will weigh 50 lbs more.

 

Give the 1406 back, rebuild the 2bl and work on tuning. Your engine was matched at the factory to use the 2 bl.

If you have oversize tires on the truck, that is what is killing your low end. IMHO



John

 

Your more straight forward. I like it.

 

Best bang for the buck on a smog 360 is to change out the cam timing set to a no-smog set- the cam is retarded on the smogger, and the main reason 360's are so gutless. Your stock set is probably pretty shot anyway, just swap in a decent non-smog set. And you'll be surprised how well it'll run with that 2V carb with the cam in time

 

Forgot that little goody. Your right! It will make a diff. Good threads on the topic search.

 

Hunt around. Factory iron four barrel intakes are normally darn near free. I have one here but the shipping would kill ya. A used Performer RPM is the next best bet. A small tube header dual exhaust, the 4 bbl and the advanced timing will make it run.

A cubic inch transplant should be a future budget item....even a 390 crank would help - and they're nearly as cheap as the iron intakes.

 

Others have gave you GREAT advice! You need to remember, what air/fuel goes in, must come out..evenly. The stock 2bbl carb and intake can be improved upon. The Timing chain\gears and cam change is a must for performance. Now your exhaust is the hinderance...leave that alone for now, the other issues will give you more performance for the dollar invested.

I have a question, I had your setup before. When you lug down driving up a hill, you cant run a steep hill at 5 mph without granny gear? You will love a moderatly built 390! You can smoke the tires up that same hill in second and third gear!

It sucked having a beefy F250 truck driving the country roads, and a little Ford Escort beating my mom to the top of the hills...GRRRR..No more.. Fuel mileage be dammed.

A STOCK 360 with 2bbl, just, well,... SUCKS when it comes to performance..oversized tires my butt is causing your issues..I ran 16.5 9.5"s to 35"s with several 360 engine's..it is a dog of an engine. Of course, I'm not a left coast MPG guy...I'm for more power for the buck...oh oh ohh

PS I built a engine with advice from people on this site, it is not perfect, I will try it again next year. It will do this, it will FRY posi 33's in second gear on pavement, and get around 13mpg. This is a truck just like yours.

 

I have 4:10 gears in it, I would like to know what you intend to do to your engine to make it awesome, especially getting 12 or 13 miles per gallon, I am getting about 8 mpg right now, of course that is fully loaded and pulling a trailer. I should check it empty on the highway. Thanks for your advice.

 

dhobdey1: I ran an all stock 360 in my 76 F-100 2WD for 16 years, so I know how you want more power. I decided to drop in a high performance 390 with headers and upgraded cylinder heads, intake and carb. Yes I get worse MPG's compared to the 360, but that's what you lose with way more power. There is no looking back to a 360 because you can't see from all the smoke coming off the rear tires...LOL

OJ