hey all I have a 84 f150 with the original 351 block rebuilt 40,000km ago.(not the HO) It's bone stock. I was looking to do some basic bolt ons. (carb, intake and exhaust) I bought some hedman headers and plan on doing dual exhaust, either 2 1/4, or 2 1/2(havent chosen mufflers yet). I also recently picked up a edelbrock 600cfm vac secondaries carb. Part # 1406, i got a smokin deal on it. I still need to buy an intake, I'm looking at the edelbrock performer, part # 2181. Would that work nicely with my choice of carb? any other recomendations are much appreciated. Im not touching the heads/cam or any internals at this point. How much of an increase in hp and torque am I going to see? my engine stock is 150hp and 280ft lbs of torque. Think I can hit 180hp and 300ft lbs with those bolt ons?

thanks guys

 

Go with the 2.5" exhaust, the 1406 should hopefully work well. Be prepared for the left hand turn stumble, and tuning it to death to get it to work right. But, hopefully you don't have the issues I did. I got rid of mine. Edelbrock performer is essentially an aluminum copy of the stock 4V intake from what I have seen. But, I'm sure there are people who will disagree with me on that. Nothing wrong with that intake either way. I have a Weiand stealth 8023 myself and really like it. Performer RPM is the equivalent to that. I picked up power from idle to 5000 RPM over my stock 4V intake and MPG never changed. In reality, either the Performer, performer RPM or an american made Weiand intake will all do just fine. Personally I run a Summit 4bbl and it runs great.

As far as meeting those power numbers you mentioned, if you changed the cam and did straight up timing and just bolted on a better intake and carb you'd probably be up in the 200-240 range. If you left the stock cam it'd probably be around what you said. A distributor spring recurve will make a lot of difference also that's overlooked a lot of times.
My combo is stock heads, Comp XE250H cam, Weiand Stealth, Summit 600 cfm 4bbl, Hooker long tube headers, 2.5" dual exhaust into 1 magnaflow style muffler with 3" single tailpipe out the side. Stock DSII ignition with a centrifugal advance recurve. Makes a nice sound, no drone in the cab. I love it. It runs circles over how it was stock and mine was an H.O. BTW, I drive this combo 5-6 days a week.

For what it's worth, the exhaust system I had built made the biggest difference of all the work done, different carb and fine tuning made the second biggest diff but the cam and intake helped a lot too.

 

Thanks for the reply and all of your input. What exactly do you mean by a "better intake and carb"? do you mean that there may be a better choice? Also, from what I know, the HO's came with a more aggressive cam. How does the comp xe250h compare to your stock cam? This is my daily driver so it's good to hear yours is performing well under the same circumstances.

 

What I meant by better intake and carb was better than the stock 2bbl stuff. The engine in my truck was rebuilt when I got it, and when I swapped cams I found it already had a Comp 252H in it that was a turd.

here's an exhaust clip.


The RPM range is rated from 600-4800 RPM and it pulls hard right off idle. I pulled a car off a flat bed tow truck with this thing and didn't even touch the gas for 90% of the way pulling it off.

 

Since you do not have a HO, you might have the computer controlled 351w version, I have heard some of the guys on here talking about it.

See if you have a vacuum line with a vacuum advance going to the distributor. If you don't, you may have to replace the ignition system for your other plans to work.

 

I forgot all about that. Most of the 2bbl 351w's seem to have had TFI ignition, the H.O's had DS II.

 

sounds solid, Im going to be in the same rpm range as you

 

Thanks for the info! sorry for the late reply, I believe that is my current set up. If replacing it is the case, i was told petronix is a better choice over msd. Any recommendations?

 

another update:

In the next day or two I'm going to order
intake #2181
flowmaster over axel pipes for the dual exhaust
carb tuning kit
a few other odds and ends
for the mufflers I plan on going to with some flowtech raptors, they are like 30$ each. My buddy is running a pair and I like the sound. previously I had some classic thrush turbos, but for half the price the raptors seem like a good choice.

 

As far as going aftermarket with the ignition, do some searching, summit is probably the best for this. Find what is applicable, gets the best reviews and is priced right. Make sure you get something with vacuum advance.

 

Sounds like you have some money, I would get a new distributor and get something that is easy to play with and adjust the timing curve. The Ford dist is not very friendly when it comes to changing weights and springs. You will want to mess with this, the timing can make a huge difference your power output when you are changing things around like you are doing.

 

hello all!
I apologize for leaving this for so long...
I recently went ahead and did the upgrades.
The carb ran okay upon the first start. It was lean and popping in the high rpms, but we managed to almost completely tune it out. I can honestly say that i'm happy with the performance increase. There was a noticeable increase in throttle response and pull right off the line. Definitely can smoke the tires now... There was also an increase in the higher end as well when the secondaries open. Keep in mind that my kickdown isnt hooked up currently and I can imagine that would make quite the difference in terms of feeling this power. In conclusion, I can confidently say that the seat of the pants dyno was satisfied.

Does anyone have a guesstimate as to what HP and TRQ numbers my truck is putting out now?

I'll upload some pictures tomorrow at some point


Jared

 

Im sticking with the stock distributer for now due to my budget, but I agree that timing can make a world of a difference. That is next on my list though when it comes to performance upgrades, along with possibly a shift kit.