How to increase horsepower in 1978-79 bronco - Ford Bronco Forum
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post #1 of 119 (permalink) Old 04-13-2011, 06:04 PM Thread Starter
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How to increase horsepower in 1978-79 bronco

Ok well I searched the arhives and could not find an answer. I might have missed it if so I apologize.
But my question is how do I increase horsepower and torque on a stock 1978-79 bronco. I would be getting one with an automatic. So any solutions and tips would be nice. I would really like explainations and details as to what to do and why this increases it.
At the same time I would sill like it to be a daily driver but I wanted to make it something I could go off road with as well as squeel some tires at a stop light now and then. So in other words I'm not looking to create something insane. I put it under This title and all so the next guy with the same question will be able to find the answer by doing a simple search on here.
Thanks
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post #2 of 119 (permalink) Old 04-13-2011, 06:11 PM
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My plan one day is to put a 429 CJ that my friend has rebuild and pickled in his garage, then I will have to figure the tranny. Oh yea the the $$ he wants for the engine, but it would be so nice. Its such a big truck and the 351m is just not enough.

You should own something older than you!!! and cougars don't count!!!
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post #3 of 119 (permalink) Old 04-13-2011, 06:29 PM
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Ecoboost V6, Cummins 4bt/6bt...

If you want serious power and good survivability with MPG concerns leave the world of naturally-aspirated engines and go turbos.

1996 Ford Bronco Eddie Bauer 5.8/E4OD EFI
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post #4 of 119 (permalink) Old 04-13-2011, 06:48 PM
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Depends on the engine. Some upgrades work pretty well across the board, but other engines have certain things that help more than on others...

The simple answer to your question is drop in a fuel injected 460... but you can also build smaller engines to produce the power as well...

My other car has doors.
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post #5 of 119 (permalink) Old 04-13-2011, 07:19 PM
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Everybody is saying 460 I have a 390 in my bronco and it has lots of head snaping power.But if you want to wake up the engine you have in your bronco here are a few ideas.First headers and dual exhaust,allumiumn intake with a 600 edlebrock carb.These upgrades will make a difference you can feel.If thats not enough go with a good cam.My 390 has a rv cam with all the goodies I wrote above.One thing about the 460 upgrade is that aftermarket parts are a lot cheaper than the 390 plus it is easier to install.
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post #6 of 119 (permalink) Old 04-13-2011, 07:41 PM
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Quote:
Originally Posted by 79broncoowner View Post
Everybody is saying 460 I have a 390 in my bronco and it has lots of head snaping power.But if you want to wake up the engine you have in your bronco here are a few ideas.First headers and dual exhaust,allumiumn intake with a 600 edlebrock carb.These upgrades will make a difference you can feel.If thats not enough go with a good cam.My 390 has a rv cam with all the goodies I wrote above.One thing about the 460 upgrade is that aftermarket parts are a lot cheaper than the 390 plus it is easier to install.
I agree 79. You can definetly build up a smaller engine to do serious work, and your upgrades are some of the ones I mentioned that give you gains on most any engine.

I just picked up a 78 (see my new thread ) that has a 400 with most of what you talk about on/in it and it gets with it pretty good.

The biggest advantage I can see to the 460 is the ease of fuel injection, cost of parts and the potential with enough time and money. That said, my 400 wont be going anywhere anytime soon!

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post #7 of 119 (permalink) Old 04-13-2011, 07:56 PM
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Bronco Info: 1986 Bronco XLT 4x4 -AOD -Warn Hubs, NEW stock 302EFI (2008) All MSD ignition, 9mm FMSR wires
A simple solution $$$$ wise would be to add a set of headers, prominent ignition components, balanced carburetor and maybe some moderate gear change in the differential.

Without knowing what engine size you have in this BKO IDK for sure BUT take a look at FSB member Sixlitre's thread "ignition & timing upgrade and see what you get out of it, otherwise you would have to build a new engine to what HP you want.

These trucks however aren't really designed for TOP END speed but rather LOW END "torque" for 4x4 pulling Off Road so just keep in mind a power to weight ratio principal, but a little more horsepower can't hurt....lol lol

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post #8 of 119 (permalink) Old 04-13-2011, 11:31 PM Thread Starter
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What to do for a 351
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post #9 of 119 (permalink) Old 04-13-2011, 11:43 PM
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Get the crank and pistons from a 400 and they go straight in to your 351 and you now have a 400.

For a bit more get aftermarket heads and a modern cam, do headers.

1996 Ford Bronco Eddie Bauer 5.8/E4OD EFI
1993 Ford F-150 Custom 5.8/E4OD EFI
1979 Ford F-150 Custom 5.0/4speed
1997 Jeep Cherokee 4.0/automatic
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post #10 of 119 (permalink) Old 04-14-2011, 12:43 AM
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first thing, get an indexable timing chain. The timing on these is really bad and you want to be able to run the timing strait up.

If you want to also do cam and intake, do it all at the same time so it is easier. Those valley pan gaskets arent cheap.
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post #11 of 119 (permalink) Old 04-14-2011, 02:00 AM
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Headers? 100% not necessary. Asking for problems.

Timing set. Check

400 crank & pistons from TMeyer check.

Check out tuffdawgs on ebay, TMeyer & Barnett High Performance

This company used to make a 400 CID crate motor but they have stopped building them.

http://www.proformanceunlimited.com/...4_stroker.html

You can build 460 horsepower much cheaper than 400 CID horsepower. Many more aftermarket parts available.

Buy a shortblock - much easier for the novice. Edelbrock heads would be nice.

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Originally Posted by InfoFord View Post
if you still can't figure it out put it back together and take it to a mechanic
"Under my plan electricity prices would necessarily skyrocket" BHO

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post #12 of 119 (permalink) Old 04-14-2011, 09:52 AM
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You're rolling around ina 5k brick, nothing will be neck snapping. But I like to add this for a little entry level fun (on a 400):




I also like adding a carb from Holley's 4150 line up and an eddy performer...and no point in making inhale better if you're not gonna let it exhale, so I add some headers to the mix that dump to a 2.25" exhaust, usually with some sort of glass pack.



Ben
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post #13 of 119 (permalink) Old 04-14-2011, 12:29 PM Thread Starter
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Ok so your saying start with a small block and build up to a 460. Could you explain.
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post #14 of 119 (permalink) Old 04-14-2011, 12:35 PM
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You can dick around with a 400 & you'll still have a 400. Or you can buy a running 460 out of a junk yard or CL & make big power & torque. A lot of the parts like the tranny & the dist & the radiator are the same. Bolt in deal.

Quote:
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if you still can't figure it out put it back together and take it to a mechanic
"Under my plan electricity prices would necessarily skyrocket" BHO

Truck was stolen & sold for parts Wheat Ridge Colo Black with Red 2 tone. About $20K in the truck. VIN U15HLEC0170
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post #15 of 119 (permalink) Old 04-14-2011, 12:38 PM
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Quote:
Originally Posted by Bronco5757@msn.com View Post
Ok so your saying start with a small block and build up to a 460. Could you explain.
I think he is listing options for your 351m build, but then also telling you to buy a 460 and stroke it to 514 cu. inches. The shortblock is pretty much the bareblock and then you add the parts like heads and intake up to longblock, then carb, accessories and turn-key.

The problem with the ideas like that is even though 500+horsepower is nice, you'll get like 6MPG on the engine he posted.

Read my second post, best cheap bang for your buck... Make your 351M a 400...

1996 Ford Bronco Eddie Bauer 5.8/E4OD EFI
1993 Ford F-150 Custom 5.8/E4OD EFI
1979 Ford F-150 Custom 5.0/4speed
1997 Jeep Cherokee 4.0/automatic
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post #16 of 119 (permalink) Old 04-14-2011, 01:21 PM
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Bronco Info: 1979 w/400, 4" lift, 35's, 3.55's
Quote:
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Read my second post, best cheap bang for your buck... Make your 351M a 400...
Agreed, even with the cost of getting the necessary 400 parts, you should still be able to get a 3-350hp 4-450lb/tq thumper for under 2grand if you do the work yourself. Which, IMO, isn't too far off of purchasing a running 460, nabbing the appropriate parts and purchasing the parts to achieve the same numbers.

That said, if you're looking for numbers any better than that, it's waaaay more cost effective to go 460.



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post #17 of 119 (permalink) Old 04-14-2011, 02:53 PM Thread Starter
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No I like the numbers that were put up. I think just putting a little work into a 351 will do the trick. Just a little extra without over doing it was what I was looking for. So any specific brands are names I need to know for the parts?
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post #18 of 119 (permalink) Old 04-14-2011, 02:56 PM Thread Starter
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And UTfball. What was all that you were talking about?
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post #19 of 119 (permalink) Old 04-14-2011, 03:04 PM
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Tim Meyer is all you need to know. Give him a call and see what he suggests, then buy the parts from him. I've called him before just to pick his brain. Last time I called though, he said he's been toying with a couple new Lunati voodoo cams that will compete with the comp DEH255. Outside of that, I'm sure he'll tell you to nab a 400 crank, his hyper pistons, a dual plane mani, a 6-650cfm carb, he'll put you on a cam set and probably even tell you to grab a set of headers. And to this time, that's still what I mold all of my mild builds around.


Quote:
Originally Posted by Bronco5757@msn.com View Post
And UTfball. What was all that you were talking about?
Basically the stuff I just listed.



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post #20 of 119 (permalink) Old 04-14-2011, 05:22 PM Thread Starter
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How do I get ahold of him.
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