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Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

N/A - headers a yes or no?

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  #31  
Old 09-22-2006, 11:04 AM
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The big difference with the Crawford headers (over the competition) is not that they are equal-length (as others are as well), but that they are long-tube headers. Crawford offers the only long-tube headers for the G, which is why they have a higher peak-gain over many of the others and why the engine needs to be raised to install them.
 
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  #32  
Old 09-22-2006, 11:22 AM
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Originally Posted by jasperg35
crawford's are longer, topspeed, pro-1, dc, strup, and a few others are equal length (as opposed to borla).
that's what i thought was understood from my previous quote.

gt-ron... agreed. that advantage is a big one... definitely the reason they stand out.
 
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  #33  
Old 09-22-2006, 12:19 PM
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Originally Posted by GT-Ron
The big difference with the Crawford headers (over the competition) is not that they are equal-length (as others are as well), but that they are long-tube headers. Crawford offers the only long-tube headers for the G, which is why they have a higher peak-gain over many of the others and why the engine needs to be raised to install them.
Ok, so is the peak power the only performance advantage they have worthy of the price jump? I don't want to pay a big premium if the only advantage I get is a few HP improvement at a certain RPM and for most of the rest of the RPM band it's pretty much the same, especially given the install process.
 
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  #34  
Old 09-22-2006, 12:21 PM
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Is there going to be much of a difference in gain (on dyno, buttdyno, and times) - sound aside - between 5/16", intake, exhaust, and header vs. 5/16", intake, exhaust, header, and HFC?
 
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  #35  
Old 09-22-2006, 12:54 PM
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Originally Posted by ChiefyMan
Is there going to be much of a difference in gain (on dyno, buttdyno, and times) - sound aside - between 5/16", intake, exhaust, and header vs. 5/16", intake, exhaust, header, and HFC?
Typically - high flow cats will yield and additional 6-8HP and about the same in TQ with those mods.

Rick
 
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  #36  
Old 09-22-2006, 02:34 PM
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Crawfords are the only True Equal Length header. The others try to come close, and do. But they are not true equal length, nor do they claim to be.

Lou
 
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  #37  
Old 09-22-2006, 02:40 PM
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Pedro say No to headers!

 
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  #38  
Old 09-22-2006, 03:35 PM
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Originally Posted by Ca$hio
Pedro say No to headers!

Pedro got Gold Paint on Doors - Not Too Smart. Don't Trust Pedro

Lou
 
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  #39  
Old 09-22-2006, 10:42 PM
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Originally Posted by ISMSOLUTIONS
Typically - high flow cats will yield and additional 6-8HP and about the same in TQ with those mods.

Rick
That's in addition to the other mods, correct?
 
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  #40  
Old 09-22-2006, 10:43 PM
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Originally Posted by ChiefyMan
That's in addition to the other mods, correct?
Yes - as stated additional with those mods -
I have seen with Stillen intake and 1/2" spacer and increase of 12HP and 10 TQ......Rick
 
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  #41  
Old 09-22-2006, 10:57 PM
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Originally Posted by ISMSOLUTIONS
Yes - as stated additional with those mods -
I have seen with Stillen intake and 1/2" spacer and increase of 12HP and 10 TQ......Rick
Alright, and what kind of effect does it have on the power band? Is the improvement pretty evenly distributed, or are we talking mostly upper-RPM improvement or very peaky, what?
 
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  #42  
Old 09-22-2006, 11:01 PM
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Originally Posted by ChiefyMan
Alright, and what kind of effect does it have on the power band? Is the improvement pretty evenly distributed, or are we talking mostly upper-RPM improvement or very peaky, what?
Pretty even all the way through the band - most power (1-2 hp) comes in from 5500 and up.
 
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  #43  
Old 09-22-2006, 11:23 PM
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Originally Posted by diablo1356
ive heard doing all the normal exhaust mods excluding the exhaust is a really good setup...supposedly the stock exhaust flows pretty good and adding in a TD or a larger pipe will cause a big low end power loss...99atlantic is running the I/H/HFC and says he has no power loss but all gain...anyone wanna shed some light on this...ive heard it many times and im in the process of purchasing a stock exhaust to try it out...
Let us know how this works. I'm in a sedan, but am considering headers, hi flow cats with stock cat back (also ecu later). Also possibly an HKS rear section (for sound) depending what the cats and header sound like on stock.
 
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  #44  
Old 09-23-2006, 06:58 AM
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are headers smog legal in california??? If so i'm getting some....
 
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  #45  
Old 09-23-2006, 12:19 PM
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Originally Posted by markiev37
are headers smog legal in california??? If so i'm getting some....
DC Sport carries a carb sticker and approval...
 
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