Author Topic: INTAKE/EXHAUST RUNNER LENGTH  (Read 167 times)

0 Members and 0 Guests are viewing this topic.

Offline CATDIESEL

  • 3 cube
  • *
  • Posts: 15
  • Karma: 1
INTAKE/EXHAUST RUNNER LENGTH
« on: March 17, 2013, 09:07:29 pm »
has anyone here ever tried making intake/exhaust runners longer or shorter for more performance? i guess the exhaust would affect the performance the most? i have thought about decking the exhaust flange on the jug. also making some custom spacers to move the muffler away from the jug in 1/4" increments. any thoughts on this?

Share on Facebook Share on Twitter


Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: INTAKE/EXHAUST RUNNER LENGTH
« Reply #1 on: March 18, 2013, 04:43:16 pm »
In general, longer intake will bias the tuning towards lower rpm.   Calculating the resonance frequency is beyond my ability but there may be some programs available to do this on two strokes....

Offline Al Smith

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2778
  • Karma: 179
Re: INTAKE/EXHAUST RUNNER LENGTH
« Reply #2 on: March 19, 2013, 04:14:39 am »
Resonant frequency on both the intake and exhaust is the ellusive pot of gold nobody has managed to acheive over any width of rpm range except a very narrow band .

 

Related Topics

  Subject / Started by Replies Last post
9 Replies
1168 Views
Last post November 16, 2014, 01:13:35 pm
by Cut4fun .
20 Replies
557 Views
Last post November 09, 2013, 10:09:18 am
by Moparmyway
36 Replies
643 Views
Last post November 28, 2018, 04:34:07 am
by Al Smith
8 Replies
181 Views
Last post August 07, 2014, 06:16:36 pm
by foragefarmer
3 Replies
180 Views
Last post September 25, 2014, 09:14:09 pm
by The Ripper
7 Replies
124 Views
Last post April 19, 2015, 10:07:34 am
by 1manband
5 Replies
206 Views
Last post September 17, 2015, 06:46:44 pm
by Cut4fun .
1 Replies
258 Views
Last post January 25, 2016, 11:21:00 am
by srcarr52
0 Replies
106 Views
Last post January 26, 2016, 07:57:11 pm
by Cut4fun .
1 Replies
64 Views
Last post January 16, 2021, 07:16:55 am
by Cut4fun .