GraphiteG37S

iTrader: (29)

^ by adding "restriction" you are referring to the stock cats right?

But won't that eventually cause harm to the OEM cat or reduce life significantly?

G37Sam

True, and adding exhaust restriction to solve an issue isn't the way to go IMO

shumby

iTrader: (3)

lol you guys are too much.

Kaver. I am not running fully stock. i have stack headers and cats but FI cat back on the car now.

Here is the fact of th3e matter. FI LTH do not play nice with GTM's SC set up.

I will now leave it up to you guys to bitch and moan about why or whay not. But until someone who actually has tuned and made a SC kit for these cars all answers are horse crap.

GraphiteG37S

iTrader: (29)

I agree with you entirely shumby, I am not professional and have no idea why they don't play nicely as you so simply put it. I'm just curious as to why and do not offer any answers of my own.

DmfG37sTT

Shumpy, outside all the other crap, how is the car treating you? any vids? hope everything is working out. interested to see how this install goes

Mike

iTrader: (1)

If this kit is capable of being CARB legal, then no, cat life should not be affected significantly. CARB requires that the vehicle produce identical emissions post modification as it did stock.

WPPJR30

iTrader: (13)

Is it the general consensus here that people are looking at it as a negative if the stock headers allow the supercharger to perform better? I'm certainly not an expert, but I don't really think it's a matter of "adding restriction" as opposed to the system simply demanding backpressure for optimal performance. Am I wrong? (I admit that I very well could be... )

But, for example, (and I realize that these are not Shumby's headers) I know Stillen puts a little footnote at the bottom of the page advertising their headers telling you to consult them before installing them on a F/I vehicle. STILLEN : STILLEN 350Z / G35 / G37 / 370Z Headers

GraphiteG37S

iTrader: (29)

That makes a lot of sense, I forgot about the CARB legal aspect and answers my question about the longevity of the OEM cats and catback and headers.... Case closed.

I hope GTM is able to become CARB certified, that would be great.

Shumby, how are you enjoying your car?

Q8y_drifter

That footnote is most likely there so that they take it into consideration when they send you the Uprev map.

Staples

iTrader: (9)

Okay Shumby, on a real note when they installed your supercharger did they increase your idle? Stock idle is 650rpm, but they normally increase it to 800-850rpm, any idle issues? I have a specific reason why I ask; I have an aftermarket flywheel and a uprev tune that is giving me issues when I increase the stock idle from 650-800 (rough idle every 20 seconds or so).

Q8y_drifter

^^ Are you sure it's from the flywheel and/or idle adjustment?

Mike

iTrader: (1)

That sounds like a tune issue.

Idle is typically increased with bigger injectors, as larger injectors have trouble with smaller amounts of fuel.

G37Sam

Actually with a SC, they increase idle rpm to make enough power to overcome the parasitic losses for the SC pulley

Mike

iTrader: (1)

I knew I overlooked something..

Fezzik

iTrader: (6)

Any update on this second install Sam?