Reducing oil consumption.

[Tzar177]

Eh... whats the point? If these things do essentially the same thing, why mess with it? That, and i don't want to have to fabricate another bracket for it.

I have a perrin catch can for sale (black) if anyone wants it.

Also, installed them, started her up and the idle seemed really smooth. Went for a drive and the car was running noticeably better. I had higher oil presure (ever since i put it back to the stock setup and ditch my catch can the oil pressure was reading a lot lower) and the entire car seems to rev a bit faster, and smoother.

I'm very impressed.

 

[Kansei]

Can't wait to hear if the consumption is down/stopped with these (without catch can). I could go to a catch can setup and just ditch the PCV system totally (just letting it breathe freely with a hose from the valve cover where the pcv was to a catch can, from catch can to intake pre-turbo) but for whatever reason everyone seems to keep the PCV valve around on these cars.

 

[CitizenPro]

I'm very impressed.

Good deal, let us know how the oil consumption responds in the next week.

 

[Kansei]

~2000 miles (maybe 2500 I didn't check my log book today) since my last oil change, and today I added a little over a quart of oil (probably 1.3.. was just checking on it before an SCCA solo test and tune day, good thing I did). I'm sick of this PCV spewing out tons of oil. I thought the millenia PCV was supposed to be so much better than stock. Is the stock one worse??

At the price I'm paying for oil (9 dollars a quart) going through it this rapidly isn't really fun haha.

 

[daedalus]

I may not be of much help in the oil consumption results... My car has traveled 40 miles in the last year and a half... Tzar's your boy for that.

 

[LinuxRacr]

I may possibly give these a try.

 

[daedalus]

It does look like their website doesn't have a good link for the product to purchase. It worked when i ordered a couple weeks back.

Might want to try and contact Kane. I spoke to him on the phone today via the phone number on the "contact us" part of the web site. Very nice guy.

 

[daedalus]

Double Post. (stoned)

 

[daedalus]

My only problem with that is that they are trying to find noticeable gains on less than a 80hp engine? So what, they want a crank vent to give them 5hp or something? They want 6.5% power gain from a vent valve? On our 170hp MSP's that means that we would be looking for roughly a 11hp gain from the valves alone. I don't know about you, but i don't expect that kind of gain. Were lucky to get that out of an intake or smic.

The dyno chart automotive speed posted up on their S2k says it all. Don't expect huge gains. They only netted around a 1% increase (2-3 hp on a 200hp car), and never claimed to do much more.

Don't do this mod expecting more HP, do it expecting not to have your engine eat oil, smoother throttle response, better oil pressure, and a better running engine (mine is noticeably "healthier" sounding). Oh, and i didn't notice any of the "popping" noises that the S2k guys had been reporting.

I'd also like to note that the S2k guys are reporting a 97% decrease in oil consumption at 3mpg increases in fuel economy directly after install. Whats there to lose here guys?

My .02

 

[daedalus]

Can i rebute? lol...

A good read...

http://www.s2ki.com/forums/index.php?showtopic=393122&st=0

Notably:

I "introduced" the Kranvents to Comptech. I had some issues with my blower, and brought my car to their facility. In the process of trying to diagnose the issue, they tested the amount of pressure in the blower and crankcase with and without my Krankvents installed. What they found was that boost was entering the crankcase, and by the third run dyno run, I was getting FULL boost in the crankcase and blower. Mind you, the pcv on my car only had 5000 mile on it. I installed the Krankvents almost immediately after installing my SC (@5000 mi).

Without the Krankvent system, I achieved only ~ 270 ish whp (can't remember off hand). This was when boost was bypassing the pcv. With just the Krankvent at the PCV, ~ 285 whp. Then, with both installed at the pcv and breather, I hit 305 whp.

Aside from the power gains, you do not want any boost inside the blower because of the design of the gaskets (inner and outer) at the shaft. This increases the chance of the gaskets blowing, and eventually leaking.

As a result, they opined that the AP2 pcv design may be weaker, and that they were going to recommend the Krankvents - at least to one at the pcv - to prevent boost from entering the crankcase.

I've got over 36k on my car, SC installed around 5k, with Krankvents installed around 5500k.

And:

Now the Krank Vent: During idle and partial throttle operations, the flow of gases is from the back side of the pistons (crank case blow by gases), through the PCV valve, and into the intake manifold. The driving force for this flow is the partial vacuum of the intake manifold. There is no flow through the front valve cover breather because the Krank Vent valve connected to it is kept shut by the partial vacuum. At full throttle, there is no vacuum generated, the PCV valve and the Krank Vent valve connected to it shut, and the blow by gases are relived through the front valve coved Krank Vent, which is no longer held closed by the vacuum, into the intake manifold.

So, from an EPA standpoint, whats the difference? Not a whole lot except the Krank Vent system is better at getting rid of blow by gases. With the stock system the flow of gases occurs mostly in the valve cover area fresh air mixed with blow by gases which rise to the valve cover area by convection. In the case of the Krank Vent, all of the flow is blow by.

So what are the advantages of the Krank Vent and a vacuum in the crank case? Heres how I see it:

1. Piston rings seal better so you burn less oil.
2. You get better flow in the oil return line of the SC or turbo
3. And most importantly, you prevent boost pressures from entering the crank case, which will reduce your HP, possibly blow front or rear engine seals, and possibly destroy your turbo by backing up the oil return line. You only need one of the Krank Vent valves for this one.

There may be other advantages to running a vacuum in the crank case that I am not aware of. I know that NASCAR and NHRA dragsters run external vacuum pumps for this purpose, and I know that these guys usually know what they are doing.

I believe I was the first on this forum to use the Krank Vent. Ive been using one for almost 3 years with no negative effects. I change my oil every 3000 miles or every 6 months, whichever comes first, and I have never had to add any in between changes. And the oil remains pretty clean between changes.

 

[Jaysanooch]

I'd like to try this and i'm trying to understand the way to install.....so It's pcv-->krank vent-->intake mani and the other is... side of valve cover-->krank vent-->intake? Here's a picture of my set up.

 

[Tzar177]

yes that is correct

 

[CitizenPro]

I went ahead and ordered them. Im tired of my car feasting on my oil...

 

[Jaysanooch]

yes that is correct

Ok thanks! I'm ordering this then.

 

[kane.s2k]

The dyno you found on s2ki netted 2-3whp almost all the way across. It was a back-to-back run with the engine running hotter. Unlike a lot of other cars, the S2000 is very difficult to make power out of N/A. Most N/A mods that cost over $1000 only net 3whp. I am certainly not saying your car will make any HP gains but on an engine like the F20C/F22C which gives almost no horsepower per mod, for $110 it's been impressive. However it depends so much on car to car but everyone will agree their oil consumption has gone down, better gas mileage, and the torque curve is a bit smoother.

Anyways, the site is working again...see the sig.

 

[LinuxRacr]

Kane, have you applied for Authorized Vendor Status yet?

 

[dirtysouth_msp]

Very interesting... $130 is not much to keep everything nice and clean and reduce oil consumption. I saw an improvement with the millenia sc pcv vavle, but this looks to be a much better option.

 

[daedalus]

Pics of install (and a disgustingly dirty engine bay):

 

[FlyinMSP]

if that's disgustingly dirty...

 

[Kansei]

if that's disgustingly dirty...

he doesn't get what us cold snowy north people have to deal with