crankcase evac. sys.

[scort2498]

will a crank case evacuation system work for our little fourbangers... i know it wont help as much as it would on a v8 but just outta suriosity. would it.

[iceracer]

We already have one. It is called Positive Crankcase Ventilation aka PCV

[scort2498]

aha... so it wouldn't be beneficial to line the breaher from the vc and throw it down to the exhaust?

[mechtech]

It would work worse that way.^^

The only improvement would be to make an evacuation air pump to suck the blowby out.
This can help ring sealing at high RPMs at full throttle. Some racers get up to 5-6 HP by doing so .
Don't waste your time for the street.

[scort2498]

hmm...i know someone that has done this in his zx2 and basically swears by it... also it was running extremly good considering his mods. especially in the higher rpms.

[zxtuner98]

ask him? lol

[scort2498]

i know what he says... i wanna know what u guys think.

[iceracer]

Unless he can prove it on a dyno and not his seat of the pants dyno, it's just his theory that it works. Why monkey with a proven system ?
That idea originated with race cars with wet sumps and headers to help evac the crankcase at high RPM. It would not be needed with a dry sump.

[mechtech]

Crankcases that vent in the exhaust are for full throttle applications, not the street.
And it doesn't always work right.