F.I. Long-Tube Headers installed - Review/Pics/Vids/Dyno

semtex · 04-29-2010, 04:32 PM

Quote:

Originally Posted by UFreefer

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.

NYBladeZ · 04-29-2010, 04:50 PM

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.

semtex · 04-29-2010, 05:10 PM

Quote:

Originally Posted by NYBladeZ

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.

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.

SE · 05-05-2010, 12:46 AM

Hey do you have a CEL?

semtex · 05-05-2010, 08:47 AM

Quote:

Originally Posted by weeeee

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.

SkyZ · 05-06-2010, 12:59 AM

Quote:

Originally Posted by semtex

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.

ChrisSlicks · 05-06-2010, 10:56 AM

Quote:

Originally Posted by SkyZ

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.

SE · 05-06-2010, 11:38 AM

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

XwChriswX · 05-06-2010, 03:15 PM

Quote:

Originally Posted by SkyZ

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!?!?!

SkyZ · 05-07-2010, 01:01 AM

Quote:

Originally Posted by XwChriswX

You let them rectally violate your Z!?!?!

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

kevin.z · 05-07-2010, 02:55 AM

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.

Diocletian · 05-07-2010, 07:38 AM

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

vipor · 05-07-2010, 09:07 AM

Yiffing is where it's at

semtex · 05-07-2010, 10:47 AM

Quote:

Originally Posted by XwChriswX

You let them rectally violate your Z!?!?!

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

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

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.

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.

shumby · 05-07-2010, 11:49 AM

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

lol

04-29-2010, 04:50 PM	#107 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	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. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

05-07-2010, 07:38 AM	#117 (permalink)
Diocletian Enthusiast Member Join Date: Mar 2010 Location: Orlando, Fl Posts: 350 Drives: 09 370z CY A7 Rep Power: 15	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 __________________ Injen Dual CAI \| Illuminated Kick plates \| Stillen Sway bar kit \| F.I TDX w/ 12" Resonators \| F.I HFC's \| UpRev Tune \| 300HP/225tq Mustang Dyno

05-07-2010, 09:07 AM	#118 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 42 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 49	Yiffing is where it's at __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers

05-07-2010, 11:49 AM	#120 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 237	send semtex money via my paypal account @ stephenhumby@hotmail.com. lol __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

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05-05-2010, 12:46 AM	#109 (permalink)
SE A True Z Fanatic Join Date: Jan 2010 Location: San Jose, CA Posts: 4,236 Drives: 370z/STI/EVO X/IS-F Rep Power: 23	Hey do you have a CEL?

05-06-2010, 11:38 AM	#113 (permalink)
SE A True Z Fanatic Join Date: Jan 2010 Location: San Jose, CA Posts: 4,236 Drives: 370z/STI/EVO X/IS-F Rep Power: 23	Won't pass sniffer with LTC/test pipes. Definitely won't pass under load (dyno).

05-07-2010, 02:55 AM	#116 (permalink)
kevin.z Enthusiast Member Join Date: Oct 2009 Location: vancouver(shipping:WA Posts: 359 Drives: 09 370z M6 PGtouring Rep Power: 16	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.