Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
Registered User
Joined: Jan 2003
Posts: 2,085
Likes: 0
From: San Jose,CA
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
The corvette system is not the best. Gm likes to keep the sound down. This means stuffing the muffler and that means back pressure. A pair of 2 chamber flowmasters and you will see nearly 10%. If your vette is already making 400 horses then you may not see much more due to the engine management or intake air flow issues. Your exhast should have been the 1st or 2nd item to change due to the ease of the job and free power. Headers will net you more power if the primaries are larger enough and they will really bump if they are equal lenght. Nissan may have designed the system well but there is always room to move. This is due to consessions made by the owners-more noise is a primary concern of auto makers and we as owners may like it loud. This will give us more flexability when choosing a system.
03.5 Sedan/B. Silver/Premium/Winter/Aero
69 Chevelle BB/4.11's
03.5 Sedan/B. Silver/Premium/Winter/Aero
69 Chevelle BB/4.11's
Guest
Posts: n/a
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
Sorry I should have been more clear that the Corvette I was speaking of is the ZR-1 which is 405hp stock. Actually for a stock exhaust it is very good. Even with testing all of the several exhausts systems available the best one will only make an additional 15hp which is only about 3% gain.
Maybe some early Corvettes rated at 200-250hp might see 10% gain but none of the newer Corvettes today will see a 10% gain with just exhaust alone. That would mean a 30 - 40hp gain.
If someone proves to me changing my stock exhaust on my G35 will gain me 10% or 26hp I would do it in a heartbeat.
Dave
2003 G35 Platinum/Willow
Nav, Premium, Spoiler
'99 Prowler
http://www.zr1.net/g35.html
Maybe some early Corvettes rated at 200-250hp might see 10% gain but none of the newer Corvettes today will see a 10% gain with just exhaust alone. That would mean a 30 - 40hp gain.
If someone proves to me changing my stock exhaust on my G35 will gain me 10% or 26hp I would do it in a heartbeat.
Dave
2003 G35 Platinum/Willow
Nav, Premium, Spoiler
'99 Prowler
http://www.zr1.net/g35.html
Registered User
Joined: Dec 2002
Posts: 79
Likes: 0
From: NJ, USA
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
I'd have to disagree w/ you... The engine in the G35 is a totally differenent engine than the RB engines in previous Skylines.
Also I'd also have to agree w/ those who've responded to this thread doubting that an exhaust system alone would yield a 26hp gain.
The only cars that I've seen respond well to an exhaust change were turbocharged cars, and this was after only changing other things along the intake and exhaust(air cleaner, downpipe).
-----------------------
My Web Page
Also I'd also have to agree w/ those who've responded to this thread doubting that an exhaust system alone would yield a 26hp gain.
The only cars that I've seen respond well to an exhaust change were turbocharged cars, and this was after only changing other things along the intake and exhaust(air cleaner, downpipe).
-----------------------
My Web Page
Registered User
Joined: Jan 2003
Posts: 2,085
Likes: 0
From: San Jose,CA
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
The ZR1 was a complete package done by Lotus and there really is not much left to get out of that engine combo. Well, maybe cutouts...now we're cheatin'
03.5 Sedan/B. Silver/Premium/Winter/Aero
69 Chevelle BB/4.11's
03.5 Sedan/B. Silver/Premium/Winter/Aero
69 Chevelle BB/4.11's
Registered User
Joined: Dec 2002
Posts: 74
Likes: 0
From: atlanta......soon austin
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
does anyone else see that the tq curve looks like that of a turbo'd car. it spikes whereas NA cars are much flatter. for comparison, here is mine.......
You have been weighed.....You have been measured.....and you have been found WANTING!!!
22088-4170g35dyno.jpg
You have been weighed.....You have been measured.....and you have been found WANTING!!!
22088-4170g35dyno.jpg
Thread Starter
|
Registered User
Joined: Dec 2002
Posts: 103
Likes: 0
From: Houma, LA
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
Ahh... I'm back from my weekend trip... I see there was a lot of action while I'm gone. DrRick, what have you done to your car? Is it stock making 224 RWHP?
2003½ Sedan Black on Black
Nav/Premium/Wood
2003½ Sedan Black on Black
Nav/Premium/Wood
Registered User
Joined: Dec 2002
Posts: 74
Likes: 0
From: atlanta......soon austin
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
stock, 6 speed, coupe. and i wasnt trying to call BS or flame. your dyno just looks weird. very unlike an NA car......
You have been weighed.....You have been measured.....and you have been found WANTING!!!
You have been weighed.....You have been measured.....and you have been found WANTING!!!
Registered User
Joined: Dec 2002
Posts: 1,606
Likes: 0
From: Texas
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
so it has to do with how the engine is "cooled"?
'03 G35 Sedan: ivory/aero body/sport/sunroof
Warning: Objects in mirror are FASTER than they appear
'03 G35 Sedan: ivory/aero body/sport/sunroof
Warning: Objects in mirror are FASTER than they appear
G35driver.com Moderator
Joined: Nov 2002
Posts: 3,476
Likes: 0
From: Mishigan
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
no dude. Naturally Aspirated means NO TURBO, NO SUPERCHARGER, NO BLOWER
<font color=blue>-Rambo</font color=blue>
All your base are belong to us!
<font color=blue>-Rambo</font color=blue>
All your base are belong to us!
Registered User
Joined: Jan 2003
Posts: 5,946
Likes: 1
From: San Diego, CA
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
It's just how the engine breathes. Naturally Aspirated (NA) engines suck air in through the intake. Forced Induction (FI - not to be confused with fuel injected, check your context) engines have extra air crammed into them at higher pressures via a supercharger or a turbocharger. I believe a blower is just another name for a supercharger.
2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter
2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter
Registered User
Joined: Dec 2002
Posts: 74
Likes: 0
From: atlanta......soon austin
Re: Fresh Dyno on my SEDAN! And a 13.86 ¼ Mile pass!!
this is what i was talking about. if you look at the bottom red lines, they show a stock IS300 (3.0 liter I6). notice how the torque peaks relatively low and stays flat. the upper lines (the blue ones) show that with boost, the tq has a sharper peak and the drops off.
You have been weighed.....You have been measured.....and you have been found WANTING!!!
22156-stage3.gif
You have been weighed.....You have been measured.....and you have been found WANTING!!!
22156-stage3.gif