QUOTE(Lexichi @ Mar 14 2019, 10:21 PM)
What's the different between long extractor and short extractor?
QUOTE(krazymy @ Mar 14 2019, 11:48 PM)
Good question! What's the different between both long and short 4-1 and 4-2-1?
In theory, short extractor will give that torque boost at higher rpm
long extractor will give at a lower rpm
Long 4-1 will give low rpm torque boost
short 4-1 will give high rpm torque boost
4-2-1 will give broader powerband.
4-1 would deliver the power stronger
4-2-1 would deliver softer and broader.
but diameter of the extractor pipe affect the performance too.
Is actually a quite long list of what to look at the extractor.
Interpert how you needed.
Different engine, different driver, require different setup.
QUOTE(krazymy @ Mar 14 2019, 11:50 PM)
1.8 should be just right for both acceleration and top speed right?
I'm now using 2inch from head to toe and I've been feeling lacks of torque, top speed is good but just how many times would I rev that much..It's not a VTEC engine anyway.
I've got a short 4-1 actually, and my muffler is mugen twinloop, with a bullet inside with something like a (SPINNING FISH SCALE)
Oh ya! By 1.8inch you mean inside or outside?
I would say 1.8 would to give just enough better flow for a broad powerband.
As too large defeat your acceleration, too small would restrict.
I give you my experience.
I used to run 4-1 short on my 1.3 campro, i felt like the power was way up high in the rev.
Now I run 4-2-1 sequantial extractor, now I feel my powerband is around 2-3k RPM.
You have to really try to know, I'm only giving you info.
I think the biggest restriction would be your swirl bullet.
Inner diameter 1.8 inch.
Good luck finding the setup.