LZY13B build thread

[sambb]

Would agree that if you are comparing full free flowing systems that 2.5 versus 3 has probably nothing in it with the amount of gas that a K03 will push. If you intend on doing a half system though then going to 3'' over 2.5'' is a about the only way to build maximum volume into a relatively short run of pipe. ie you are operating on a different premise to a full system - you know that after a point that back pressure will steadily ramp up as the back section will struggle to evacuate gasses. eg flow restrictors don't really become restrictors until they are flowing hard.
Building volume into the front section buys you time before that back pressure becomes an issue - hopefully enough time that given our 5000 rpm shift point it won't even be one. I can only pass on what my exhaust guy crunched in his brain but he was adamant that a 2.5'' half system wouldn't cut it in this respect. Remember volume is cubed, area is squared. The cross sectional area of a 2.5in versus 3'' is still significantly different but when you multiply that c.s.a by 2 meters of pipe length, the volume change is enormous.

[Blue9N3]

Going to test that theory. Getting a 3" dump installed but with the standard cat. Am curious to see if it makes a difference....


Sent from my iPhone using Tapatalk

[h100vw]

Std cat is pretty dense. 800 cpi I think. That's a fair amount of cell wall.

[Blue9N3]

You're probably right, but I'm curious (and a cheapskate)


Sent from my iPhone using Tapatalk

[LZY13B]

I spoke to my mechanic again and asked him about a hiflow cat and he just installed one in a 180sx and not sure what brand or who his supplier is but he gets stuff cheap he said it was only $120 for the 3" hiflow cat lol. I told him what I wanted 3" off the turbo with the hiflow cat and the two sensors and he will get back to me with a final price

[sambb]

I can't remember what you are intending on doing. Are you going to phase 2/stage 2 to account for the exhaust or are you going to try to run it on a base tune?

[LZY13B]

I'll be going stage 2 tune already running stage 1 revo and it's only $100 for the upgrade to stage 2

[HAR80N]

your gonna love it once you get the dump pipe on becomes a whole new beast head up your gonna need good tyres

[seangti]

Can people please stop raving about stage 2, it's making me want to do that to my daily I just can't seem to part with that car. It makes no sense to mod it, over even really keep it, lol, but, but, we all know how it goes.

Keep us posted on cat and dump prices

[rgvlee]

I don't think it's worth owning a pog unless you have stage 2 at a minimum