catless is always better

do i need 3" + or can i go with 2.5"inch exhaust

2.5" or a little bigger is ok. 3" is really only good for turbos.

It would be better to have high flow cats.

You may lose 10 hp or so with high flow cats, but maybe even less than that.

The benefit is that It reduces emissions of hydrocarbons, carbon monoxide and oxides of nitrogen by over 90%. I'm sure you've heard it, but let me reiterate it..... We are killing our planet. Having cats on a performance vehicle is the least that one can do to help out the environment.

One car on the road without catalyitic convertors is like having an 20 extra cars on the road.

I was following a Mitsu evo last night with aftermarket blowoff valve, fart can muffler and no cats. The fumes were making my eyes water every time I came up behind him at a stop light. Disgusting. Turning the clock back to 1968 just to get an extra 10 hp? It made me so mad that I thought about writing his plate number down and sending an email to the highway patrol.... in the end I chilled out and didn't do it.... but I could sure see someone else doing it. I would be a little worried about having a catless car just because if they forced me to do an emissions test over a complaint, I would have to undo all my other mods.

-Phim

Just for you phimosis im taking my cat off my pick up too :gtfo2:
carbon has not been proved to cause gobal warming take this to the off-topic part of the site.


It made you so mad that u wanted to write his plate number down.. are you insaine??? I mean really?? the first mod i do it take off the cat. its awesome here in indiana we have no vet testing! and the air is great.

Just need a good Centrif instalation.
NOVIDEM – Hightech-Kompressor-Systeme
Shame they only sell in Europe

This probably isn't even a good board to have this debate, period. We're here to discuss cars, not politics and geoscience :)

:ughdance:

Regressing back to my previous car (Mustang), positive displacement superchargers typically removed the intake manifold and sat nicely in the valley between the heads. I'm not too familiar with the VQ37VHR layout, but it could very well be likely that a positive displacement S/C can still fit if it can sit nicely in between the heads.

Now, something unrelated:

Personally, if its a positive displacement S/C, it has to be a twin screw to be worth my time. At the very least, an Eaton TVS blower would do. Supercharging the VQ37VHR would most likely need to be a positive displacement because of the DTB. I can easily see a positive displacement S/C replacing the manifold, and both throttle bodies and going to a larger, single intake pipe and filter.

Just my :twocents:

Catalytic converters convert carbon monoxide and nitrogen oxide to CO2...a well known global warmer! :eek:

:D

LMAO hahahaha and ^ is most certainly not gonna stop anyone hahaha w/e im gonna be gone in another 60 years :p

What does carbon have to do with it? Cats don't reduce carbon.

lets get back on track and keep hounding stillen until the give us a price range and date range on this SC

cant wait to see what stillen has up their sleeve!

For reference, does someone know what Stillen charges for their 350 S/C kit? installation cost?

also, after reading about the 350 S/C on Stillens website it states that the kit was r&d'd for almost a year before it went on sale...guess we can expect the same for the 370 kit. Also states that a 7th injector is used in the intake plenum for the 350 kit. Wonder if 370 will be the same

I would guess the kit is being R&D'd on a g37 (since they came out in 2008). Then it's just minor changes to plumbing and mounting brackets to make it all work.

:drool:salivatin' here for update

update

^^^what a tease!

lol.. sorry.. you left the barn door open..

No additional info yet, but it is a high priority. It's still in development, it will be a ways out, but we're working on it.

Take your time, I need to save up for it anyways. If it comes out too soon I won't be able to afford it yet and it's gonna be painful.

^^^ LOL! Sell plasma and then sell a kidney! :D

I think donating sperm will be a little more fun :inoutroflpuke:

This doesn't mean much, but I wrote to ATI, Vortech, Procharger, Hennesey as well as Heffner and some other tuners asking if they would do a supercharger for the 370z. After all, if enough people are asking, they'll make one!

Most of them said no, they had no plans to do a supercharger for the 370z. Interstingly, Hennesey wrote back and said that someone else had a project in the works that should be out by the end of summer that they could install for me:

"We are anticipating a supercharger for the stock bottom end 370z to be available around the end of summer. We do not develop
the superchargers in house and it does take time for these systems to become available to the aftermarket."

I wonder who their supercharger kit supplier could be?

If anyone has any ideas, please let me know.

-Phim

Thanks for the info. Unfortunately, I wouldn't be able to trust Hennesey.

Whats wrong with Hennesey?

Here's where this question was asked on another forum a couple of years ago, and someone provided other links to past stuff, etc... So is Hennessey Performance Engineering a fraud? - SportsCarForums.com

^Yep.

Ok Josh, It's time to chime in again and say you have no new developments to report.

Thanks,

-Phim

yes, where are you on this ? :excited:

It's in development, it's going extremely well, and it will be a while before release. We'll definitely pass updates as we have them.. :)

Will adding the supercharger require tuning?

Tuning will be included..

I'm guessing by your answer that this won't be considered a DIY install.

What if a person has HFC's, CBE, & Tuning by let's say UpRev. Would the UpRev tuning be pretty much useless if the plan was to add your supercharger kit down the road since the vehicle will be re-tuned?

Say the someone orders a Stillen S/C kit and decides to install it themself, would they have to mail in or drop by the shop and have the ECU retuned?

A DIY install option would be nice. Maybe purchase an updated ECU with a core refund?

Also would be nice to know if you plan to have agreements with installers in different parts of the country or if you plan to just start local... thanks

ok i know there isnt a ball park figure for this yet but anyone know how much something like this would typically cost?

My understanding is that the hp gain from ECU tuning is mostly from ignition advance. Having more ignition advance on a boosted engine at high rpm will give detonation, which destroys engines. So... You need a map with ignition advance when you're not under boost to maintain good power output, throttle response and fuel mileage. Then, under boost, retard the timing to prevent detonation.

This makes tuning an ecu for boost a must.

The kit (as they do now) will be with complete installation instructions that any trained and experience mechanic can install. Obviously it's preferable to find a shop who is expertly familiar with adding something as fairly complex as a supercharger, but there is no specifically challenging aspect to the install, as we'll do all of the R&D to make a bolt-on kit.

In fact, I would imagine it will be an install option at Nissan dealers who deal with aftermarket products. Hundreds of our superchargers have been installed at the Dealership level for the Z's / G's / Titan / Frontier, etc.

Being that the goal is CARB compliancy and 50-state legal, most dealers are comfortable with the install.