I just recently installed a used Vortech with a 3,12 pulley, installed new belts, and added CNT high flow cats (new gaskets) and had my car tuned with UpRev. I noticed that when I'm in boost >4k rpm, I can smell what I think smells like oil or burning rubber. Mind you, I'm not roasting my tires either. When I looked under the hood, everything looked and smelled fine. Anybody have this problem? What should I be looking at?

Thanks.

 

belt slip?

 

The belts were tightened right before the tune. They're on there pretty tight. Not too sure how tight the cog belt should be though.

 

DO Not over tighten the Cog Belt, it needs to have about 1/2" of play Dead Cold, check Full Hot, should still have some play.

 

The cog belt still has play in it. Would it possibly be the A/C belt? I think that its still a bit loose.

 

Maybe clutch issues?

 

What other symptoms would I see with any clutch issues? It doesn't seem to be slipping at all.

 

Slipping Clutch has a Distinct Smell, like Brakes.

Serp Belt needs to be tighter than one would think.

Look for any Black Soot, around or near the serp belt. If it is more than just a tiny amount, then the serp belt is slipping.

 

I could smell my clutch before I noticed it slipping.

 

..had that rubber smell when the hose clamp tail end on the silicone coupler near the cog belt was hitting the cog belt...shredded it in 5 miles...always keep a spare belt on hand and don't trust some shop to install it correctly

 

Did you have stock cats on prior? Could be the new high flows causing a tad bit of smell.

 

Okay, so it's now the end of summer and I still have the smell after about 3,000 miles. No unusual belt wear or dust. I noticed the smell the other day after about 5K rpms. Could I have a worn supercharger seal or maybe I have a small filter attached to the hose that should have went into the intake filter? The air filter that was included didn't have the inlet to connect that hose to the filter.

 

So you're venting valve cover to the atmosphere through that small filter? That could definitely be a source of the smell.

 

I'm probably going to switch to the filter that came with the Vortech just to see if the smell goes away.

 

That's what I'm thinking as well, in boost anything without a check valve on the pressure side, especially on the PCV system will cause the smell. Most of us S/C guys use a catch can because venting it to atmosphere stinks and it always seems to come in the car. I don't have a 350z so I wouldn't know where the PCV hoses are routed but with Whipple S/C on my Ford, we have a pcv under the intake, vent that right to atmosphere otherwise it will blow oil right into the intake on boost. Another one each valve cover.

The brake booster is also either with a check valve or put on the inlet of the S/C but you can't do that because that would mean moving the throttle body before the S/C.