what size..

[PaImportTuner]

For the people running 10-12psi. what size exhaust are you running on your JRSC setups. Basically what does your exhaust components from head and out consist of.

right now i have a B16 in my CRX
B16 JRSC kit
GSR cams
Buddyclub cam gears
OEM ITR valvetrain
Kamikaze w/2.5" collector
Omni 2.5" straight pipe
Thermal 60mm(2.35") catback
9psi

new setup
All the stuff above added with
B20z
street/strip ported head
11psi

The thing is currently i'm running 2.5"->2.35" exhaust on b16 @ 9psi right now. and i feel that my current setup is choking.

Now with b20vtec and port job @ 11psi i would think more psi, flow and larger displacement would call for bigger exhaust.
Is 3" good or overkill?

so if 3" is fine should i go
Kamikaze 2.75" downpipe/3" catback?
Kamikaze 3" downpipe/3" catback
btw i'm making the custom downpipe

[00TypeR]

itr @ 10psi with hytech 2.5 header/exhaust.

[kingmarc]

go 2.75to3inch exhaust and make sure it is mandrel bent. I am running 3 inch catback exhaust on my rex with only 9psi but I am also spraying a 50shot tru it.

[PaImportTuner]

Originally posted by kingmarc:
go 2.75to3inch exhaust and make sure it is mandrel bent. I am running 3 inch catback exhaust on my rex with only 9psi but I am also spraying a 50shot tru it.

<font size="2" face="Verdana, Helvetica, sans-serif">would making the primaries bigger help too?

i think i will make bigger primaries too. once i find out the current size of the kami primaries and use the current head flange and 4-1 merge collector but massage it a bit around the welds.

i was actually thinking of making my own kami style header for a while now. since i welded up a custom turbo manifold before so this shouldn't be hard.

i'll need a lot of time and luck.