headers short or long tube
Legend
Joined: Jul 2011
Posts: 8,259
Likes: 4
From: Austin, TX
I just ordered the stock tunes for now. I installed kegger mod, 180 tstat, timing set, plugs, wires, rotor, and cap, so truck is prety stock. Cap was so bad and plenum had about 1/2 cup of oil in it, plugs and wires may have been factory. With so many issues it is not possible to determine how much improvement is due to the tune. But as it eliminated the death flash, I do have a reasonable certainty that it helped as well as comments that I have read from others.
I am considering HS rockers, headers and exhaust rework, and other items, and will then order cutom tune when I get these done.
Record Breaker
Joined: Feb 2009
Posts: 1,133
Likes: 18
I think in order to optimize flow you want to match header primary size to exhaust valve size. Oem heads have 1.625" exhaust valves if I'm not mistaken which is 1 5/8". I believe you can still source Hedman headers with 1 5/8" primaries though the Edelbrocks and Thorleys seem to have gone extinct maybe. You may lose a little low end by running 1 3/4" primaries and a little high rpm performance with 1 1/2" primaries. As I've heard it the problem with shorties is they don't scavenge as well as long tubes so maybe the larger diameter pacesetters gets compensated for in this way.
Since I don't have flow benches and all that you may want to take this advice with a grain of salt. I will say the Edelbrocks I have installed seemed to give a nice but small positive bump in performance across the entire RPM band.
Since I don't have flow benches and all that you may want to take this advice with a grain of salt. I will say the Edelbrocks I have installed seemed to give a nice but small positive bump in performance across the entire RPM band.
Registered User
Joined: Feb 2012
Posts: 8
Likes: 0
I saw these and thought they were a great deal!
https://dodgeforum.com/forum/3rd-gen...-239-00-a.html
https://dodgeforum.com/forum/3rd-gen...-239-00-a.html
Amateur
Joined: Feb 2019
Posts: 25
Likes: 0
The model years that had a dual in cat should really consider trying to find a set of the Doug Thorley tri-Y headers that are occasionally seen about. That's the best compromise of low end grunt and high end gains to be found.
The 2001 model year is a strange animal. My truck does indeed have a Y pipe into a SI/SO cat. However, the y pipe ends in a 3" compression, not the earlier 2.5". It had a 2.5" reducer and expander on each side of the cat and muffler, and went back to all 3" pipe everywhere else. I had my exhaust guy cut out the reducers and ran 3" SI/SO cat and muffler and now I have a full 3" exhaust system.
It is the damndest thing I had ever seen. I think dodge expanded the piping on the 2001 model to 3", (which is where they got the extra HP claims over previous years) but used left over muffler and catalytic converter stock from the 2.5" pipe days.
Bottom line is, if you've got a 2001, check it before you assume anything.
The 2001 model year is a strange animal. My truck does indeed have a Y pipe into a SI/SO cat. However, the y pipe ends in a 3" compression, not the earlier 2.5". It had a 2.5" reducer and expander on each side of the cat and muffler, and went back to all 3" pipe everywhere else. I had my exhaust guy cut out the reducers and ran 3" SI/SO cat and muffler and now I have a full 3" exhaust system.
It is the damndest thing I had ever seen. I think dodge expanded the piping on the 2001 model to 3", (which is where they got the extra HP claims over previous years) but used left over muffler and catalytic converter stock from the 2.5" pipe days.
Bottom line is, if you've got a 2001, check it before you assume anything.
Veteran
Joined: Jan 2017
Posts: 475
Likes: 41
From: Imperial Beach CA
My 2001, shorty Pacesetter Headers, Remflex gasket and ARP bolts. Mine still has the stock Y-pipe (Cali). My cat has a 2.5 inch coming out the backend. I cut the cat pipe 2 inches from the exit so I could hook up the adapter 2.5 to 3 inch. An Ebay 3" system (Flowmaster wannabe) running all the way back with a SI/SO muffler in the mix. The wanna be muffler has about the same sound as super 44. This exhaust system is close to what I bought. It's Mandrel bent and comes with a 2.5 to 3 inch adapter. https://www.ebay.com/itm/141965828196
