Header test
#1
Banned
Thread Starter
Header test
Its not an s2000, but pretty interesting none the less. I'll be taking what we're learning w/this to build a header for my 2.4liter motor thats coming together for my S!
The header on our shop car (EG hatch with k24) had a pretty crappy stamped collector on it that kept falling off and was generally irritating, so I bought a merge collector and a megaphone/reverse cone from mandrel-bends.com.
This is what we came up with
Here's the dyno - Orange line is the header how it was, green is after we changed the collector
Picked up a ton in the middle and lost some up top
The header has 1.75" runners that step to 1.88"
The megaphone is 2.5" to 5" then down to 3"
I picked the megaphone/reverse cone size with no rhyme or reason.
This is on pump gas
k24 87.5mm
+5cc wiseco pistons
stock crank with cheapo rods
RLZ CNC RSX-S cylinder head
Drag Cartel 4.5 cams
Excessive center inlet intake manifold with 58mm runners and q45tb
Here's the car
The header on our shop car (EG hatch with k24) had a pretty crappy stamped collector on it that kept falling off and was generally irritating, so I bought a merge collector and a megaphone/reverse cone from mandrel-bends.com.
This is what we came up with
Here's the dyno - Orange line is the header how it was, green is after we changed the collector
Picked up a ton in the middle and lost some up top
The header has 1.75" runners that step to 1.88"
The megaphone is 2.5" to 5" then down to 3"
I picked the megaphone/reverse cone size with no rhyme or reason.
This is on pump gas
k24 87.5mm
+5cc wiseco pistons
stock crank with cheapo rods
RLZ CNC RSX-S cylinder head
Drag Cartel 4.5 cams
Excessive center inlet intake manifold with 58mm runners and q45tb
Here's the car
#2
You should try moving the megaphone further away from the header collector.
Read up a bit about expansion chambers in 2 cycle motors, and it will start making sense how expansion chambers can play a big role in tuning a car with big cams.
Read up a bit about expansion chambers in 2 cycle motors, and it will start making sense how expansion chambers can play a big role in tuning a car with big cams.
#3
Banned
Thread Starter
we wont be doing anymore testing on this motor... chucked a rod on the dyno last night. 3/8" arp 2000 bolts are NOT ok for a k24 being beat to 9800 rpms... haha
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