1 Vacuum Line?

[bce240]

I saw this post on the KA-T forums and this guy was only running 1 vacuum line to the fuel pressure regulator. He took off all the emissions stuff too. Is it safe to do this? Does the engine still run right?

[neverlift]

search biotch no he ha dto have a tee or another one hooked to his brake booster.

wh you want to kill trees?

[matt4pl]

i have one running to the FPR, another to brake booster, and one for the MS, which is t'ed off the fpr line.

[bce240]

what is MS?

[matt4pl]

megasquirt, standalone ecu

[bce240]

i know this sounds stupid, but i dont have that right? and do i need the SCV?

[matt4pl]

no... what is an scv?

[bce240]

swirl control valve i think........saw it on ka-t.org........i might as well keep it i guess

[matt4pl]

those are also called secondary butterflies. they are in the intake runners close to the ports, and are vacuum controlled. some people remove em, and i see it as a restriction in the intake. only s13's had them.

[bce240]

so would you remove them?

[matt4pl]

probobaly... search, see why people remove em, and waht involved, then decide for yourself

[neverlift]

I'll hook you up we have a write up for it on nico just search it.

I took mine out as I'm one of the a$$ that thinks sohc ka like to rev over 5k. they are kinda like a vtec please excuse my lack of a better word, they help control "swirl" to create greater low end POWA,but say f off to top end hp. My personal biew is that the ka makes plenty of ft*lbs down low with a nice flat power band without them so why not gain a bit up top. A nice way to compliment that is header/exhaust. as ka is restrictive more so on the ext side....... its kinda a debate atm, if you plan to eprom tune you may consider leaving them and tune around them,IIRC someone on that forum was doing this, dont remember anything else tho...

btw I was messing with you about the whole tree killing thing

[bce240]

thanks for all the help guys. i think i got it the way i want it.