any significant differance between long tubes and shorties?
08-17-2006, 11:42 PM
#1
Registered User
Thread Starter
Join Date: Jul 2002
Location: baycity, mi
Posts: 1,652
any significant differance between long tubes and shorties?
buddy is trying to tell me that on his 89 TA 350 TPI that longtubes wont make a differance over shorties, and that longtubes will hang too low for his stock ride height. i run longtubes on both my 4thgen LT1 cars and the seat of the pants o meter said 2 thumbs up. does anyone have any or know of any places i can find like a dyno comparison for longtubes to shorties?
08-18-2006, 05:34 AM
#2
Registered User
Join Date: Dec 1999
Location: MD
Posts: 2,022
Re: any significant differance between long tubes and shorties?
Car Craft did a nice writeup on this several years ago.
Basically, given the same primary diameter and a quality collector, the long tubes have only 2 advantages:
1. Tuning by adjusting primary tube length.
2. Additional low-mid RPM torque.
Shorties will make the same peak HP (sometimes a little more) and will do so at a higher RPM.
Basically, given the same primary diameter and a quality collector, the long tubes have only 2 advantages:
1. Tuning by adjusting primary tube length.
2. Additional low-mid RPM torque.
Shorties will make the same peak HP (sometimes a little more) and will do so at a higher RPM.
08-19-2006, 03:24 AM
#4
Registered User
Join Date: Aug 2000
Location: Alberta Canada
Posts: 54
Re: any significant differance between long tubes and shorties?
Originally Posted by Marc 85Z28
Car Craft did a nice writeup on this several years ago.
Basically, given the same primary diameter and a quality collector, the long tubes have only 2 advantages:
1. Tuning by adjusting primary tube length.
2. Additional low-mid RPM torque.
Shorties will make the same peak HP (sometimes a little more) and will do so at a higher RPM.
Basically, given the same primary diameter and a quality collector, the long tubes have only 2 advantages:
1. Tuning by adjusting primary tube length.
2. Additional low-mid RPM torque.
Shorties will make the same peak HP (sometimes a little more) and will do so at a higher RPM.
08-19-2006, 03:12 PM
#5
Registered User
Join Date: Jun 2006
Location: Birmingham, AL
Posts: 196
Re: any significant differance between long tubes and shorties?
Technically the longer tubes produce a lower frequency scavenging pulse compared to shorties or midlength headers. This should mean that the boost in exhaust efficiency brought on by the scavenging would happen at lower RPM's than with the shorter tubes, WOT dyno charts that I've seen tend to support this.
The longer tubes could potentially provide a solid SOP gain that wouldn't even show up on a WOT dyno pull assuming the gain was mainly at part throttle.
Later, Michael
The longer tubes could potentially provide a solid SOP gain that wouldn't even show up on a WOT dyno pull assuming the gain was mainly at part throttle.
Later, Michael
08-23-2006, 02:53 PM
#6
Registered User
Join Date: Nov 2000
Location: Grandville/ Grand Rapids, Michigan
Posts: 1,003
Re: any significant differance between long tubes and shorties?
Hooker SuperComps are ok for ride height. The problem lies in buying the Y-pipe for them. You also need to either purchase or make a trans mount that allows the dual 3" pipes tuck up under the car, with my Mufflex Y-pipe, I have 3" of ground clearance with the stock trans mount.
08-23-2006, 03:51 PM
#7
Registered User
Join Date: Dec 1998
Location: Haslett, Michigan
Posts: 2,161
Re: any significant differance between long tubes and shorties?
Originally Posted by RedIrocZ-28
Hooker SuperComps are ok for ride height. The problem lies in buying the Y-pipe for them. You also need to either purchase or make a trans mount that allows the dual 3" pipes tuck up under the car, with my Mufflex Y-pipe, I have 3" of ground clearance with the stock trans mount.
Andris Skulte is making them now and ground clearance for long tubes is no longer an issue! This is for the T56 retrofit application, no less.
08-25-2006, 09:54 PM
#9
Registered User
Join Date: Dec 1998
Location: Haslett, Michigan
Posts: 2,161
Re: any significant differance between long tubes and shorties?
Well Wishmaster, Why not contact Andris Skulte and ask him for one? I'm sure he'd make one if he saw demand building for it. I got an email yesterday that said he was busy building these crossmembers a dozen at a time. So email him and you never know what he'll shake out. This crossmember is LIGHT but strong. I like it.
08-25-2006, 11:10 PM
#10
Registered User
Join Date: Feb 2000
Location: Pilot Mountain, NC
Posts: 560
Re: any significant differance between long tubes and shorties?
do they make some sort of y-pipe for long tubes that will follow the same route as the stock pipes...so I can still run long tubes and still have ground clearance? I dont want to run shortie 1 3/4 ..I want long tubes.they sound better.
08-26-2006, 08:38 AM
#11
Registered User
Join Date: Dec 1999
Location: MD
Posts: 2,022
Re: any significant differance between long tubes and shorties?
Originally Posted by Wishmaster
what about for a 700r4? my car is lowered some but I still want to run long tubes with my new 383..anyway?
Thread
Thread Starter
Forum
Replies
Last Post
chevroletfreak
LT1 Based Engine Tech
202
07-04-2005 05:00 PM