Amirns

I was changing out my stock throttle body with a Ported one and once the TB was removed I noticed a brown color stain right by the snout which I can only assume is oil, it was just some residue. Is it something to be concerned about?

Bill Dearborn

There are some forum members who would have heart palpitations over finding oil residue there. Me, I don't think it means anything.
Bill

Warp Factor

Are you using an oiled air filter?

Z0HS1CK

Just be happy you have warranty.

To me, when i changed my TB i didn't see an oil. But that was 5-6k miles ago.

I think as the mileage goes up, so will the oil residue take place? I think it's because we don't have catch cans on our cars.

Warp Factor

Crankcase gases and mist enter downstream of the blower snout.

Amirns

No, Im using the BMS filter

Amirns

Thats might be a big factor

Amirns

I wasn't really worried about, just curious. Now my mind is at ease

lordofwar

I pull my supercharger cover every 2500 miles and wipe out the oil.the reason I do not install a catch can is it voids warranty.see my pulled the supercharger cover redux pics I just posted.

_zebra

but a catch can will help alleviate that.
and just be happy you didn't find this behind your TB

Thomasmoto

I just added a catch can for this issue. My car has a pretty big cam in it and it pulls oil past the pcv valve easier due to the lower vac from the cam.

David@MMS

removing the lid to sop up oil that did collect, is not doing anything for the rest that went on in.

also, car manufacturers can void a warranty for any reason they want, they have no particular beef with catch cans or headers, but if they can blame a problem on something or someone else you can bet they will try. for example like the customer partially disassembling their engine prior to the claim... just sayin.

Warp Factor

Would you please explain why a larger cam with less vacuum will pull more oil past the PCV valve?

David@MMS

i can help with that one
the pcv valve is an air flow regulator, not an on off switch. piston type units like the one in these cars have a curve that goes up and down, not just up.
any other catch can companies flow the stock pcv system? just kidding i know you haven't.

Warp Factor

Thanks, but without a description of what the numbers on both the horizontal and vertical mean, how is this in any way useful?
Are these numbers vacuum, boost, fuel compensation trim numbers, or what?

David@MMS

the vertical axis is flow and horizontal is vacuum

Warp Factor

Is the flow number in centimeters per minute, cubic meters per minute, cubic inches or feet or yards per minute or per second, or what?

lordofwar

according to GM,thats normal.it sucks,but a catch can will void your warranty.catch can manufacturers wont tell you this.would you if you made them?here is the proof.pull the cover and keep it clean every 2500 miles,not perfect,but cant hurt.READ HERE
https://www.corvetteforum.com/forums...catch-can.html

Amirns

I will definitely be putting one on in a couple of month when my warranty runs out, its nice to know your supercharger is clean, but taking it off every 2500 miles is a bit overkill in my opinion but thanks for the input

David@MMS

the units of measure are not critical, if you don't mind i'd like to keep some of my r&d to myself. last time i put out too much it got copied.
I am a catch can manufacturer and i keep posting this. GM can void warranty for anything they want, does not even need to be a modification, even hard driving, aftermarket air intake, or taking apart the engine to soak up a little pcv oil.