An gauges I went the same as above prosport, I had all three oil , trans temp and boost plus AEM wideband

So by putting the cats back on I will see 11psi? And I've been reading other peoples experience with this kit. Not that I would ever go over 500whp (I have no intentions of building my motor) but why will 500hp not happen on this kit? It seems to have a lot of potential with some modifications...

Looking forward to the day all 40th's are boosted! Welcome to the club!

Thank you sir! :tiphat:

Just saw the 'Red dome'...hahah. Me too! My daughter hates it and the local guys say it is like I am a pimp! But screw both...I love it. Hate bright lights inside the car. I even keep the dash dim. And love the Stillen front...good choice. I'm going to start a 'Boosted 40th's Going to ZdayZ '15' thread...right now. Hope you will join us.

I like the blue better cause I can actually see in my car, but it didn't fit the theme of the 40th lol. I would LOVE to go to ZdayZ. Give me a link to the thread!!

i have a set of used 750cc injectors for sale for $425 bucks i upgraded to i.d 1000cc injectors. so pm if your interested

i have the stillen cats on now, the best bet would be to go OEM cats then? this means i will lose HP and TQ correct? and the exhaust will be quieter?

You will actually gain HP back with the Stock Cats over the HFC's or Test Pipes. The exhaust will be a little quieter.

I would like to say yes, because I did. I only had the Impeller upgrade ( Vortec one) and went from 9PSI to 11-12 PSI. I never saw 8PSI the kit out of the box and custom tune I was seeing 9PSI all day long, Made the Impeller upgrade ( with a handful of supporting fuel mods) and saw 11PSI. I tried to reach 500WHP and fell 43 WHP short:ugh2:

Always had the Stock cats, Just cat back from Exotic speed

Agreed :tiphat:

The fact that by running stock cats you'll make more power, still be reliable, and be 50 state smog legal is pretty awesome.


That said, I do bet that with some cams, that reduce overlap, you'll be able to make 500 whp on this platform.

There are no such things as "cam"(and or large cam profile) upgrades for this car. Well there are but they are VERY impractical money wise and to my knowledge haven't been proven to provide results.

I don't think that it is practical, nor do I suggest that it is absolutely necessary.

Overlap of the cams profiles is the important part. You dont want overlap on a f/i car. (overlap is the length of time both the intake and exhaust valves are open at the same time.) All internal combustion motors rely on cylinder pressure. F/I cars need only one set of valves open at a time to reduce boost loss out of the exhaust.

With cams that reduce overlap, you can raise boost without worrying that it'll escape out of the exhaust valves. Additionally, you can run the car without the cat, allowing you make more power that. On other platforms, running catless with an s/c = more power.

This is by no means a knock on any of the s/c and t/c kits that are available. They work great. I'm just saying that if we had the opportunity to reduce overlap, I think that we'd be able to make even more power. I defer to the k20 civic si that is running 15lbs of boost and making 420+ hp and 29X lb ft of torque...that's impressive and he used cams to get there.

There are not "cams" for our car in the traditional sense because of VVEL, it acts like a virtual cam on the intake side.
On the exhaust side we do have a physical cam, but it requires being able to adjust VVEL with the exhaust cam to make any difference which has not happened yet.