A Glasspack Muffler Performance Question
Thread Starter
|
Member
Joined: May 2003
Posts: 19
Likes: 0
From: Texas
A Glasspack Muffler Performance Question
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 what 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
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 what 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
Member
Joined: Jun 2003
Posts: 27
Likes: 0
From: Covina, CA
Probably not the response you are looking for but...
You mentioned legallity being an issue. Are you sure the glass pack you're looking at is street legal? Only reason I say this is because the local PD has field days giving fix-it tickets to people with them around here.
You mentioned legallity being an issue. Are you sure the glass pack you're looking at is street legal? Only reason I say this is because the local PD has field days giving fix-it tickets to people with them around here.
Thread Starter
|
Member
Joined: May 2003
Posts: 19
Likes: 0
From: Texas
Thanks for the reply and your concern about the extra noise, polchai.
Noise is not a factor here and I can't imagine that anything cat back could be very loud anyhow. At any rate, I ran a 3" shorty straight out of the 3" down pipe coming from the ATS turbo on the 6.9 and it was only loud when I rapped it and even then I received no heat.
Thanks again for thinking of me.
George
Noise is not a factor here and I can't imagine that anything cat back could be very loud anyhow. At any rate, I ran a 3" shorty straight out of the 3" down pipe coming from the ATS turbo on the 6.9 and it was only loud when I rapped it and even then I received no heat.
Thanks again for thinking of me.
George
