Short Stack on HI44

 Created by: jcwjrg
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 Posted: Jun 10, 2019 07:01PM
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I run stub stacks under K&N pancake filters on twin SUs. Like everyone has said, I have no idea what, if any effect they have. I hope you're planning on using an air cleaner. I'm always surprised when folks run stacks w/o filters on the street. Dedicated racers can get away with it; their engines get rebuilt every 10-12 hours. The rest of us would like to get a few more miles out of our motors.

 

Michael, Santa Barbara, CA

. . . the sled, not the flower

      Poser MotorSports

 Posted: Jun 10, 2019 11:52AM
 Edited:  Jun 10, 2019 11:55AM
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I run the MED ITG mesh filter and their stub stack on a HIF44.  Will installation of one of these make a singular impact that you will feel in the seat of your pants?  Probably not but its part of a package of little steps, intake, exhaust, cam, etc., that will help increase performance.  I like it enough that I'm on the second one-the first one lasted 15 years before the foam started to deteriorate.

 

"To catch one, you need one"....John Cooper

 Posted: Jun 10, 2019 03:22AM
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I run the MED stub with an ITG filter (A+ 1293 HIF44). My car runs well but as Spank says can't say if it's better with or without.
https://www.med-engineering.co.uk/ancillaries/stub-stacks/med-hiff44-stub-stack-system

 

 

 Posted: Jun 9, 2019 02:08PM
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Yes, I have one on one of my engine setups. "stub stack" that fits inside of a K&N Cone filter.

Dyno operator who set up the timing/fueling said they definitely help, but I can't offer you any empirical evidence of with or without.

Engine was dyno'd at 89.-something at the wheels  1275 +.060  ~10:1 compression, mild ported head, single hif carb, SPVP3 (same as Kent 286SP) minispares intake, maniflow lcb, single box RC40 side exit exhaust.

 Posted: Jun 9, 2019 01:50PM
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Anyone run a short stack on their SU HI44? Or anyone have any feedback of thoughts with running with a short stack?

Thanks