Who has a Stillen G37 Supercharger? Numbers, pics, vids!
We have done extensive testing and research on this subject as it baffled us as well. We also spoke with various catalytic converter manufacturers who use various materials in different types of catalytic converters and after all was said and done...we're talking years of testing and research here...the end result was that the stock cats hold up better than any aftermarket high flow cat currently available.
The general consensus is that the factory catalytic converters use two large bricks where as high flow cats use a smaller single core. This means that all of the heat coming out of the engine/exhaust is going through a very small core in comparison. The HFC simply can not withstand this increased demand and begins to break down prematurely.
During our research and testing we have worked on everything from 2.5 liter N/A 4 cylinders to 5.7+ liter supercharged V8's producing close to 700HP.
We have also discussed this in great length with all of the top catalytic converter manufacturers and even CARB test labs who test these cats for EPA and CARB emissions certification.
I am currently working with and testing a new product that probably won't be ready for release for another year or more. We are in the very early stages of development.
The general consensus is that the factory catalytic converters use two large bricks where as high flow cats use a smaller single core. This means that all of the heat coming out of the engine/exhaust is going through a very small core in comparison. The HFC simply can not withstand this increased demand and begins to break down prematurely.
During our research and testing we have worked on everything from 2.5 liter N/A 4 cylinders to 5.7+ liter supercharged V8's producing close to 700HP.
We have also discussed this in great length with all of the top catalytic converter manufacturers and even CARB test labs who test these cats for EPA and CARB emissions certification.
I am currently working with and testing a new product that probably won't be ready for release for another year or more. We are in the very early stages of development.
I can co-sign that finding when comparing HFC vs Stock Cats. But Stocks Cats doesn't outperform TP's when applied on a Forced Induction vehicle.
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Joined: Dec 2013
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From: Costa Mesa, California
Forced Induction covers both superchargers and turbos. In turbos non catted downpipes are better for performance. With the STILLEN Supercharger, we see better performance and numbers with the stock cats. For ultimate performance on a lot of supercharger systems and racecars running blowers you don't want to run any cats. However, on this applications (and a lot of other street supercharger kits), the stock cats will yield better performance. You can ask the guys here on the forum who can testify to that.
remarkable numbers man....
are u still gonna go through with this though? I'm sure you changed out the injectors already...
are u still gonna go through with this though? I'm sure you changed out the injectors already...
Currently with GTR Spark Plugs/1000CC Injectors and UPREV MAF Sensors is as far as I will go, the only upgrades/changes I will make is the Frozenboost front mount cooler which I feel is an awesome upgrade and a must for the High Boost Kit I am running with a 9PSI pulley.
So all in all out of the box (with a custom safe tune) how reliable is this kit for a daily driver ? I drive my car every day Not looking to make crazy power just more power than your typical bolt ons .
I daily my car and travel 90 miles round trip to work, all highway miles. I keep it under 3K and feels literally like stock and very reliable. I am currently on Stillen's custom tune and it's pretty amazing. Nothing like the tunes they offered before, this is now tuned to accomodate my high boost kit ocn 93 oct.
It's all in the tune and from my experience make sure its installed and tuned properly, this goes for any kit.
It's all in the tune and from my experience make sure its installed and tuned properly, this goes for any kit.
You should add an Oil Cooler and swap the clutch/flywheel though.
Upgrades you can add later on is (9PSI pulley/1000CC Injectors/Frozenboost Cooler to replace the Stillen heat Exchanger for more cooling & The UPREV GT Mass Air Flow Sensors)
I plan to add the Frozenboost cooler later on but the one supplied from Stillen is good enough for daily driving. More cooling never hurts also make sure you add a tranny cooler if you're auto. 6MT doesn't require tranny cooling. BTW I am still on the OEM clutch.
Last edited by Diego@Vossen; Aug 6, 2014 at 11:39 AM.
Ok thanks for your help , I have a 6puck clutch and act flywheel already also have 4.08 gears , I was planning on buying a "tuner kit" and installing myself (I'm a diesel technician by trade) and having Rt tuning tune the car for me idk if they can set an rpm limit for me maybe to 7200 because I have a bad habit of shifting at 8k and I hear with the sc that's a bad idea
Ok thanks for your help , I have a 6puck clutch and act flywheel already also have 4.08 gears , I was planning on buying a "tuner kit" and installing myself (I'm a diesel technician by trade) and having Rt tuning tune the car for me idk if they can set an rpm limit for me maybe to 7200 because I have a bad habit of shifting at 8k and I hear with the sc that's a bad idea
Former Sponsor
Joined: Dec 2013
Posts: 227
Likes: 19
From: Costa Mesa, California
Ok thanks for your help , I have a 6puck clutch and act flywheel already also have 4.08 gears , I was planning on buying a "tuner kit" and installing myself (I'm a diesel technician by trade) and having Rt tuning tune the car for me idk if they can set an rpm limit for me maybe to 7200 because I have a bad habit of shifting at 8k and I hear with the sc that's a bad idea