Nissan 370Z Forum - F.I. Long-Tube Headers installed

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- - F.I. Long-Tube Headers installed - Review/Pics/Vids/Dyno (http://www.the370z.com/intake-exhaust/18022-f-i-long-tube-headers-installed-review-pics-vids-dyno.html)

Quote:

Originally Posted by UFreefer (Post 518673)

True but the hp/tq curves will not change...the numbers might vary a bit. You could use that arguement for any dyno that was not done on the same day including the Stillen/FI comparison...so why not compare the stock vs FI? No big deal though, good write up

Well, post 96 above shows my tq curve from before the Stillen header install. Give my analysis in that post a quick read if you haven't already and tell me if you think it makes sense.

Damn this does not bode well for Stillen CBE's if that is indeed the case. First off kudos to semtex and Tony for the in depth analysis, its great how these guys will go to great lengths to show us what the "real" pros and cons are. Semtex are you planning on going with an FI CBE? I hope if you do that you see the gains you were expecting to see though in reality how often are you going to be constantly that high in the power band. Keep it up man.

Quote:

Originally Posted by NYBladeZ (Post 518713)

Per the last two paragraphs of post 96:

Quote:

And that's why I now have the F.I. CBE on order (12" resonators w/ CF mufflers). And of course, I plan to do a before and after dyno just like I did with the LTH so we can have objective data to tell us for sure. It will essentially be a showdown between the Stillen and F.I. CBEs. This is what I expect the results to be: we already know that F.I.'s CBE makes more power over Stillen's, but up until now, the advantage has been somewhat marginal, IMO. Certainly not enough for me to justify the expense of laying out the money for an F.I. exhaust. But the comparison numbers we have (from Tony) to this point between these two CBEs is from a car equipped with stock manifolds and stock cats (I think F.I.'s advantage with everything else stock is only like +1 or 2whp if I remember correctly).

I believe the LTH is the game changer. Once you uncork everything with the LTH, suddenly the difference in gain between the two CBEs becomes magnified. That's the working theory. The dyno results will tell us if we (Tony and I) are correct or not.

Also, my expectation is that the gains with the F.I. CBE vs. Stillen's will be across the board, not just in the top end. But we will find out for sure soon enough.

Hey do you have a CEL?

Quote:

Originally Posted by weeeee (Post 525376)

Hey do you have a CEL?

No. I never had a single CEL with the HFCs and I think it's even of less likely that I'll ever get one with these, given the design of the O2 sensor ports.

Quote:

Originally Posted by semtex (Post 511023)

Different jurisdictions have different methods for emissions testing, so it depends on where you live. These will pass with flying colors where I live, because all they do here is hook up their computer to your OBDII port to check for codes (aka CELs). If you're clean and haven't had any recent codes, you pass. They don't bother looking under the car to verify you have cats, and they don't put a sniffer in the pipe anymore (unless it's a really old car with no OBDII). If they did use sniffer on my car I'd be screwed. lol

im in Ontario, i think they run the car at a steady speed on a dyno and shove a device up the tailpipe. so probably would fail if this is the sniffer u were talking about.

Quote:

Originally Posted by SkyZ (Post 526669)

im in Ontario, i think they run the car at a steady speed on a dyno and shove a device up the tailpipe. so probably would fail if this is the sniffer u were talking about.

HFC's will often pass the sniff test, test pipes (or LTH) won't.

Won't pass sniffer with LTC/test pipes. Definitely won't pass under load (dyno).

Quote:

Originally Posted by SkyZ (Post 526669)

im in Ontario, i think they run the car at a steady speed on a dyno and shove a device up the tailpipe. so probably would fail if this is the sniffer u were talking about.

You let them rectally violate your Z!?!?! :wtf: :shakes head:

Quote:

Originally Posted by XwChriswX (Post 527283)

You let them rectally violate your Z!?!?! :wtf: :shakes head:

haha its either that or dont drive it at all. pick one bud :p

I really think someone should lend semtex a FI exhaust. Afterall, his contribution to this fourm is quite significant. It would suck if the 1.5k FI exhaust is not any better than the stillen's.

He can always just sell it for a marginal loss anyway, not a big deal if he has the disposable income. Also, I just noticed the "Tags" at the bottom of the page for this thread: "fast intentions, long-tube headers, semtex, yiffing, yo dawg"

Yiffing? What the hell? lol

Yiffing is where it's at :twocents:

Quote:

Originally Posted by XwChriswX (Post 527283)

You let them rectally violate your Z!?!?! :wtf: :shakes head:

Just make sure you use the right lube prior to insertion. Just think, you know all those tedious oil threads? We could start a "What's the best lube for my tail?" thread. ;)

Quote:

Originally Posted by kevin.z (Post 528237)

I really think someone should lend semtex a FI exhaust. Afterall, his contribution to this fourm is quite significant. It would suck if the 1.5k FI exhaust is not any better than the stillen's.

Quote:

Originally Posted by Diocletian (Post 528280)

He can always just sell it for a marginal loss anyway, not a big deal if he has the disposable income.

Actually, I just got laid off. I'm out of work as of 5/21, so disposable income isn't what it used to be. Oh well, c'est la vie. :icon23:

Anyway, I appreciate the sentiment that Kevin expresses above, but I'll be fine. I knew the layoff was coming prior to ordering the F.I. CBE. I was able to sell my HFCs and Stillen headers, which goes torwards the F.I. Plus I'll probably be able to sell my Stillen CBE after I make the switch, which will further help me recoup my investment. So no worries.

send semtex money via my paypal account @ stephenhumby@hotmail.com.

lol