Howdy, Folks. This is my first post in this forum although I have been reading and enjoying it for several months.

I have a 2000, F150, Supercab, XLT, with a 4.6L, 3.55/1, limited slip. The truck has 28000 miles on it.

The best that I can tell is that Ford did a good job with this vehicle as my only complaint is that it is a bit weak in the mid-range. I say this because although I do not normally tow, I do on a regular basis carry a short 1000#s through rolling hills and notice that it can stand a little more mid-range umph. The one time that I did tow, I towed a collective 6500 lbs., bumper hitched, some 150 miles and noticed that the 4.6L towed better than my previous truck, an '86, F250, 6.9 with an ATS turbo.

The only thing that I have done to date in an attempt to over come this lack of umph has been to install a K & N drop in filter and replace the 2" X 3" air box to fender well connector with a straight 3.5" sleeve. The TB and MAF have been cleaned and the computer reset. This has had a favorable effect on the light mid-range performance but has not totally eliminated it.

I am now considering installing a single glasspack muffler to replace the stock muffler. I would consider a straight pipe in liew of the stock muffler except my state requires a muffler at inspection time and a glasspack is the closest thing to a straight pipe that I can muster. This seems to be a reasonable direction of thought as the increased intake capacity supports it.

I installed the K & N drop in filter first and reset the computer. This produced a very noticeable increase in performance. After a few weeks and several trips of driving with the described load, I replaced the air box connector and reset the computer. This achieved another noticeable increase in performance although it seems less of an increase than the K & N produced on its own. The combined increases have however been steps in the right direction.

This post is an effort find someone who has paralleled my experiences and can offer advice as to whether or not the addition of a glasspack will further polish my attempt to achieve a little more mid-range umph.

Thanks in advance for any information related to my topic. Thank you all for providing a format such as this for the exchange of information.



George

 

flowmaster 40 sereis are the loudest not delta flow .i have glasspaks and they don't sound as good on FORD'S as they do on chevy's.but if you do go with glassy's get them short 12" cherrybomb's

 

forddytube, thank you for your reply and the information regarding Flowmasters and glasspacks.

At this point, neither sound quality nor volume of noise are considerations to my program. My only interest is in learning if anyone can tell me from personal experience if a glasspack straight through type muffler of any length will stand a reasonable chance to boost my mid-range torque any at all; will it diminish torque any at all; or is it a good bet that it will change the torque none at all.

Since I have dropped in the K & N and replaced the stock fender well "snorkel" connector, my mid-range has improved very noticeably. I have used two different sized sleeves to connect the air box to the fender. First, I used a straight 3.5" hard PVC type sleeve which helped some. This slid over the end of the airbox and into the finder well. At present, I am using a 3" clothes dryer aluminum discharge hose. This has been reduced in size to wedge into the airbox end, probably has close to a 2 7/8" ID with the full 3"ID inserted into the fender. This improved performance more than did the 3.5" one. I think that this may be because the dryer hose fits more snug than the other one and allows the air from the fender to enter the intake with more force and while virtually doubling the volume of air at this point.

My question is that since the incoming air has been increased, will relieving the exhaust help or hinder a gain in torque?

Thanks again for your input.

George

 

hey i think that the throtel boby spacer is what you need.sorry about not overstanding you at first.
f.t.e. rules

 

The glasspack most likely will give you some performance over the stock muffler. Another muffler you should definetly look into as it looks like a glasspack, and is pretty much a straight pipe also is the Dynomax Bullet muffler. My brother has one and it gave him much better throttle response and overall it helped quite a bit thru all RPM's.

 

forddytube, the throttle body spacer is certainly an idea worth considering and I appreciate your thinking of it as I had not given it much thought up to now. The spacer and possible removing the intake silencer may be some additional changes to consider later on, after the less expensive/less trouble to do mods have been exploited.

MrDeath8666, your comments on the glasspacks in general and in particular your brother's experience with the Dynomax Bullet muffler's affect on his ride are encouraging.

Thank you both for your input.

I believe that I will give one or all a whirl when the opportunity avails. I will post the results when I have them.

George

 

get a morosso spiral flow muffler

 

straight pipe!

 

get a 460

 

i think i overstand this problem of (sound).when you hear a big block pass by with cherrybombs or flowys, it has that deep big block sound that makes the ground tremble , trying to achive that tone without that" big block ".will have you trying every muffler made . if you hear a chevy with cherrybombs or flowys the sound is gonna be different on a ford,just like a chevy without mufflers just straight pipe sounds so cool compared to a ford,same with dodge have they're own tone.
don't get me wrong i am a ford man to the bone.

 

Sound is the only thing they are good at though. Chevy had to be good at something. Fortunate for us, its not long term durability, longevity, or reliability........or for some.........performance.

 

He said he cares for performance not really sound.