STILLEN 370Z Supercharger System - Announcement!!!

cav115

the stock car does that, not a problem.

Phimosis

Just a short update: I melted my Stillen HFC's during a track session. The cats had about 8k miles on them, 3k with supercharger. about 10 minutes into second session, after a redline shift, back to 5k, then off the throttle and "pop!" like a backfire, then the engine note changed and power was way down. I shut it off, called it a day, talked to the guys at Stillen (it threw a cataylst insufficiency code) then took it to a local mechanic. He took it apart. Both cats were melted. One core broke loose and was serving as a cork in the HFC's outlet.

I put the stock cats back on it and it runs fine. Maybe a little down on power, but not a lot. Has a less macho engine note too. :-(

Why do I post this? Because leaning out the a/f ratio is the most likley reason to get a cat hot enough to melt. Granted, I had prolonged, high rpm, full throttle use... but add the lean condition and it's gonna get real hot. The concerning part to this is that on the dyno, my car is pretty rich under boost all the way to redline. Is there something in real world driving - like fuel washout under high lateral g load - thats causing a lean condition? Just throwing it out there.....

shumby

^^^hehehehehehehehe

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Originally Posted by SAM@GTM
Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living .
Sam

Fezzik

I think i may be getting a dyno this monday. Lets keep our fingers crossed

weiboy718

I'm getting one this Saturday

350z 6spd

Depending on how rich it is, that can cause the cat to melt as well. The unburned fuel hits the hot core and it causes the fuel to combust. Having this happen for a prolonged period of time makes the cat hot enough to melt.

This happened to a lot of guys running Berk and other brand's HFC's on the 350, now most people just run test pipes on FI applications.

Lug

This is what I've always heard was the cat killer

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keep Chubbs in your pocket - Chubbs

Q8y_drifter

You can get test pipes for like $180 now. Let Stillen know and tell them you want replacement TP's

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08 G35 5AT Sedan | Stillen CBE | Invidia HFC | Injen CAI | Uprev Tune | Akebono BBK | Tanabe Coilovers | Hotchkis Sway Bars | GTSpec FSB | Black Headlights & Grille | Volk GT-F Wheels | Hankook V12 Evo Tires

weiboy718

i smell new tune and smaller pulley's with TP's

weiboy718

Stillensuper cat killer!







Just kidding hahaha!

Talking about cat's. My car exhaust smells so bad and funky in the morning start up's. Like it's super super rich so bad that i have to get out of the car till it warms up.

Phimosis

Agreed! Eyes watering rich.

Test pipes are not really an option for me. I live in the city with the worst air pollution in the US. I'm a professional and the city I live in is not that large, so I'm relatively high profile. All it takes is one angry person driving behind me with burning eyes from lack of cats to make a call to CHP and my supercharger fun is all over. The 10 hp loss is worth the 30x reduction in emissions.

Nixlimited

What's your plan, if any, come smog time? I live in CA and am really torn on going FI on a 370Z because of the hassle.

weiboy718

Solution is get a kit that is carb legal.

On a side note you probably won't have to smog till the year of 2012-2013 depending on the year of your car.

Nixlimited

Don't have a 370Z yet, but I thought there was 5-6 years on a new car. Had to sell my STi before I moved back to CA because of CARB and recently sold my M3. Currently torn between an Evo X and FI 370Z. I want a turbo car, but not sure if I want to deal with the hassle of a 370Z TT in CA and the S/C kits just don't excite me that much.

Phimosis

I don't keep cars that long, so it will be sold before it needs to be smogged. Hopefully by that time Stillen will have carb approval on their kit and I'll revert it back to the CARB kit specs before I sell it. As a side note, smog occurs at 6 years. from the Cal DMV website: "Vehicles that are six or less model-years old are abated from the biennial smog check inspection requirement."

About my tune: It is a "custom" tune. Stillen tuned it, but then that tune is probably being used as their canned tune for anyone who's running the 9 lb pulley, using 93 octane and has headers and cats. It's definitely different than their 91 octane, 8 lb pulley, stock exhaust tune.