Topspeed Header Install Completed!!!!!
xstar, have a listen to my dyno video and see if this is the same type of noise you experienced...
G-Squad Dyno Day - March 5, 2005 - SI_G35Coupe
PS - after having the 3/8" spacer installed for about 6 weeks (installed it not long after this dyno run), i am noticing some rubbing of the engine cover on the hoodliner... has this happend to you?
G-Squad Dyno Day - March 5, 2005 - SI_G35Coupe
PS - after having the 3/8" spacer installed for about 6 weeks (installed it not long after this dyno run), i am noticing some rubbing of the engine cover on the hoodliner... has this happend to you?
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Joined: May 2004
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From: fayetteville, nc
Originally Posted by rocka_fellow
the shop I intent to bring my G to for install the header want $450 just for installation alone, but he also mention that I should have take it to dealer for some computer setting change for better gain.
also, for price, depends on where you go too. i got my pulley, headers, reducer, and cats installed for $380 (they do a lot of 350z's). good luck.
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Originally Posted by SI_G35Coupe
xstar, have a listen to my dyno video and see if this is the same type of noise you experienced...
G-Squad Dyno Day - March 5, 2005 - SI_G35Coupe
PS - after having the 3/8" spacer installed for about 6 weeks (installed it not long after this dyno run), i am noticing some rubbing of the engine cover on the hoodliner... has this happend to you?
G-Squad Dyno Day - March 5, 2005 - SI_G35Coupe
PS - after having the 3/8" spacer installed for about 6 weeks (installed it not long after this dyno run), i am noticing some rubbing of the engine cover on the hoodliner... has this happend to you?
Your sound is not nearly as noticeable as mine but it is similar...One other method you can try: Take a hammer or rubber mallet and lightly tap different areas of the muffler to identify the internal rattle....Mine is really obvious out of the driver side tailpipe...DHL just pulled up with the Borla...Ill keep you posted...
BTW---What were the results of your dyno? Your car looks tight!
well, the results of that dyno run were puzzling to everyone there... with all the mods listed in my sig (this run was done before the 3/8" spacer) it pulled a best of around 226whp.
i was quick to blame this weird number on the fact that i have a 5AT, but then AxionF117 goes and pulls a 228 with almost the same mods (no headers and Fuji Legalis R) with his 6MT.
my only other explanation is that my AFR is wacky... at the tailpipe it was reading around 14.2 (Axion's car was almost the same) which is about 1.0 higher than it should be? resetting the ECU using the pedal method gained me 1hp on the next run, so that clearly didn't do anything
i will try the rubber mallet method on the muffler and see if i can locate the rattle. and my engine cover the silver paint has actually worn down to black on the drivers side.
btw, off topic but your car has like the exact same setup as mine, performance wise and electronics (just get a mini Ps2 and we'll be clones)
i was quick to blame this weird number on the fact that i have a 5AT, but then AxionF117 goes and pulls a 228 with almost the same mods (no headers and Fuji Legalis R) with his 6MT.
my only other explanation is that my AFR is wacky... at the tailpipe it was reading around 14.2 (Axion's car was almost the same) which is about 1.0 higher than it should be? resetting the ECU using the pedal method gained me 1hp on the next run, so that clearly didn't do anything
i will try the rubber mallet method on the muffler and see if i can locate the rattle. and my engine cover the silver paint has actually worn down to black on the drivers side.
btw, off topic but your car has like the exact same setup as mine, performance wise and electronics (just get a mini Ps2 and we'll be clones)
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Did you guys both dyno on the same day~same dyno?
I would think you would pull something more like 250 minimum at the
wheels...what the heck? That horsepower number sounds closer to stock-no?
Stock Bwhp: 230ish
Ztube/POP charger +5 give or take
Headers/ypipe/cat delete: 15 minimum
Did you notice a huge difference with your plenum spacer? Maybe you werent getting enough coming in to max what was going out---I dont know---Im shocked at your number though!
AF that far out of whack from bolt ons?
The dyno has to need calibration--What kind of dyno was it?
I have not dynoed yet...when I do... I really hope I see some gain for my investment...the car does feel different---most noticeable difference for me was the plenum spacer/cat delete....y-pipe I didnt notice at all-z tube sounds cool but I dont think did much--I have seen dynos from neffster showing a 5hp gain though..
~Richard~
I would think you would pull something more like 250 minimum at the
wheels...what the heck? That horsepower number sounds closer to stock-no?
Stock Bwhp: 230ish
Ztube/POP charger +5 give or take
Headers/ypipe/cat delete: 15 minimum
Did you notice a huge difference with your plenum spacer? Maybe you werent getting enough coming in to max what was going out---I dont know---Im shocked at your number though!
AF that far out of whack from bolt ons?
The dyno has to need calibration--What kind of dyno was it?
I have not dynoed yet...when I do... I really hope I see some gain for my investment...the car does feel different---most noticeable difference for me was the plenum spacer/cat delete....y-pipe I didnt notice at all-z tube sounds cool but I dont think did much--I have seen dynos from neffster showing a 5hp gain though..
~Richard~
yup both cars on same dyno, within about 2 hours of each other
no i didn't notice a big difference when i added the plenum spacer... i'm going to have my installer (Performance Motorsports) check the whole car over and run a few pulls on their Mustang dyno to see if we can figure it out
also the AF was at the tailpipe... i've been told that if i had a true wideband installed it would probably have read lower (i.e. at the cat or header)
no i didn't notice a big difference when i added the plenum spacer... i'm going to have my installer (Performance Motorsports) check the whole car over and run a few pulls on their Mustang dyno to see if we can figure it out
also the AF was at the tailpipe... i've been told that if i had a true wideband installed it would probably have read lower (i.e. at the cat or header)
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Originally Posted by SI_G35Coupe
yup both cars on same dyno, within about 2 hours of each other
no i didn't notice a big difference when i added the plenum spacer... i'm going to have my installer (Performance Motorsports) check the whole car over and run a few pulls on their Mustang dyno to see if we can figure it out
also the AF was at the tailpipe... i've been told that if i had a true wideband installed it would probably have read lower (i.e. at the cat or header)
no i didn't notice a big difference when i added the plenum spacer... i'm going to have my installer (Performance Motorsports) check the whole car over and run a few pulls on their Mustang dyno to see if we can figure it out
also the AF was at the tailpipe... i've been told that if i had a true wideband installed it would probably have read lower (i.e. at the cat or header)
SI,
New exhaust installed and the rattle is gone! HIP HIP HOORAY!!!
However, I have a slight hiss with my new Borla set up (never dull--maybe Im being a little too picky) during deceleration only when not under load.. If I rev in neutral or park it makes a slight hiss going down from 2500 to 2000....I know of 3 others that have a similar hiss while in nuetral--exploring options....This may just be something I have to live with--and I will even if I cant fix it because I love the sound...Normal and hard driving conditions produce AN AWESOME SOUND with the Borla True Dual/cat combo and it pulls a little stronger at the higher RPM's!
Let me know what happens with your dyno...Im very interested!!
Have you checked out your muffler?
Your car twin
Heres a few pics
~Richard~
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Joined: May 2004
Posts: 6,067
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From: fayetteville, nc
just an update with my defective header. the suspect header was replaced, and after further inspection, found a pin hole in the inside weld where the pipes come together in the collector, very difficult to see. the black stuff around it made it easy to find after it was off.
anyway, new header on, omg!!!! hauls butt. i got a tiny rasp forming somewhere in front of the cockpit. it's only noticeable when i'm under load, so only about 90% of the time.
anyway, new header on, omg!!!! hauls butt. i got a tiny rasp forming somewhere in front of the cockpit. it's only noticeable when i'm under load, so only about 90% of the time.
im another victim of rasp/rattling. not sure if they are from the headers or test pipes. hopeing they are from the test pipes. i do not want to replace the headers but dont mind replacing the test pipes with highflows. but some of you guys have rattles even with the high flows. damn rattles.
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