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Discussion Starter · #1 ·
I have K24A2 Supercharged and getting ready to upgrade downpipe and catback. 2.4 vs. 2.0 is my question, if a boosted 2.0L requires a 3" downpipe for peak performance, because the 2.4L is clearing more exhaust a 3.5" downpipe might be usefull. I have seen Supra's using a 4" exhaust. What do you guys think? Add the difference between displacement per cylinder related to inches and a 2.4L has .6L per cylinder. The A2 has .5L per cylinder. .5L equals .75 inches per cylinder ( .75x4= 3" ). Well using the same theroy, .6L equals .90 inches per cylinder because .75 inches/.5L = .15 inches per .1L.
Add the .1L to each cylinder and you get a 2.4L. Now we have .90 inches per cylinder and .90 inches X 4 = 3.5 inches. A 3.5" downpipe or does bore and stroke factor into this somehow? This would be a relatively cheap experiment.
 

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Premium Member
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2,213 Posts
Discussion Starter · #3 ·
Thanks, I can't wait to upgrade. I ran out of funds when I swapped my motor to the K24A2, so I had to use the OEM double walled downpipe for the EP3. I could really free up some power after a retune.
 
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