Do you have a link to that thread by chance? I wouldn't mind reading it.

 

I don't think that a 460 throttle body is going to work on a 5.0 or 5.8 truck. Also, stay away from KN. A good Motorcraft, Wix, or Purolator filter flows almost as good when clean. The oiled filters like KN are not good for sensors and they dont really do anything. Do the I6/460 air tube mod.

 

The stock filter box was warped and was letting dirt into the engine.

 

That sucks. So I take it your have the open element filter that sucks in warm air then. Instead of using the KN filter you could use AFE or AEM dry flow filters that are not oiled.

 

The issues people have with a K&N is more than likely due to over oiling. With the mods I've done to this pickup so far I have picked up almost 4 mpg. I'm not worried about it "sucking hot air" I have the air duct from the hood to the fender still in place and I run a 180* stat I it.

 

Almost all the issues with K&N filters are inexperienced people that over-oil them.

 

Thats probably true about the over oiling thing. I don't know though. We used to run KN in all of our vehicles back in the late 90s to early 2000's.

I never saw any gains and could not tell any difference. I don't use them at all anymore. They all had some type of issue with either coming apart or deforming etc. The replacement ones we had all had small pin holes for lack of a better word at the ends. I don't use them at all anymore.

I had the mass air FIPK hot air intake on my truck for a while. In warm weather the truck did not run good at all. Then I noticed that it did not seal up at the throttle body because of the mishaped tubes. So off it came and the stock stuff went back on.

I know several people that are into hot rod diesels and they won't go near them, because they don't filter as well. I've also looked into it some and high performace exotic car guys don't use them either.

So your running a 180 T stat huh? I tried that and got terrible fuel economy averaged about 12-13 mpg, as well as failed sniffer test because of it still being in open loop since it was not running at operationg temp. I run a 190-195 stat now.

You have picked up 4 mpg? What type of combined mpg are you getting now?

What all mods do you have?

How do you like the 4.56 gears and 33s? What RPM are you running at 70? I'm wanting to upgrade to 4.10 gears to go with my 31 10.50s. I aleady switched from 3.08-3.55, and that helped quite a bit.

I'm getting about 15-16 city/highway.

I do know one thing that helps fuel economy and highway drivability, keep the air dam under the front bumper. When I first got my truck that was broken off, putting it back on made a noticable difference.

 

As far as your throttle body question goes. I know that the smaller twin 56mm BBK TB is better suited for our trucks, with cam and head mods. The larger 61mm one is really only suited for heavily modified setups. Do you already know what size the 460 throttle body is? I think our stock ones are something like twin 49mm. We measured it once a few years ago.

 

When this pickup was all stock(bumper to bumper) it got 10 mpg on the hwy, around 8 ish in town/short hwy. I have since put 33s, 4.56s, K&N air filter, egr blockoff, 1 inch tb spacer, ignition upgrade, timing bump, 180* stat, a trans-go shift kit, 2.5 inch exhaust from manifolds into single 3 inch with 18 inch glasspack, all mandrel bent. Now on the hwy it gets 13.5-14 mpg most of the time. And around 12 in town/hwy combo. But I drive this thing hard. I use it like a pickup.
As for the. Gears I love them. Off hand I don't remember the rpms exact vs speed, but I know its around 2700 rpm at 80 mph in OD. At 70ish mph with OD OFF its almost 3500 rpm.

I haven't found a 460 tb to measure yet, but I would guess its a good step up from the 302/351 tb.

Later this month I'm putting long tube headers on it, and than next on the list is a cam and tb (if it helps anyways)

 

Big X2!! Check this out. What I was referring to earlier: FullSizeBronco.com - 78 - 96 Ford Bronco offroad club, forums, tech, installs Ignition upgrade to allow a larger plug gap & further advance of base timing. Try it, you'll like it! It's the only mod, regardless of cost (around $200. or less, depending on the flavor of parts use) that provides a performance increase & MPG increase at the same time. I picked up 7 mpg, but my ignition system was almost toast when I upgraded. A couple of other tweaks but still relatively stock. Before the upgrade, the only way it would do 65mph was down hill w/ a tail wind!

Also a 180F thermostat, 16 BTDC, A copper core side gap plug, gapped at .056 (.044 is stock) & because my engine MAP, I tossed in a K&N drop in air filter & didn't push the increased air intake issue any farther.

 

X 3 nothing wrong with K&N filters .....Lew

 

Lol, that is tHe ignition upgrade I did! Lol. I'm a member on that forum too.

 

I figured you were "very" familiar w/ it! What else gives more bang for the buck?

 

I don't know, but all the ones we had were crap and did not last. All I know is my truck runs the best and returns the best fuel economy with a stock type filter and the I6/460 tube.

I have known a few people that have had MAF sensor failure shortly after installing a new KN.

 

Why are they calling this the sixliter upgrade?

FullSizeBronco.com - 78 - 96 Ford Bronco offroad club, forums, tech, installs

I have done basically everything that that link illustrates. I have the Ford Racing 9mm wires though. I have the timing advanced, but only to about 12 degrees. I did it along time ago and cant remember. I think that any more than that seems too high for a stock engine. They are a little too long. I wonder if the Lightning wires would fit better.