Power loss - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

GamblerZ · 09-05-2002, 08:57 PM

I went to get my car inspected and was promptly turned down when the dealer said I had an exhaust leak which need fixing first.

This morning I went to get the leak fixed and found that the exhaust was cracked on both end welds of my resonator on my 3" Blitz Realize TT catback exhaust. Rather than replacing it with a straight pipe, I replaced it a hi-flow glass packed resonator. We also noticed that the exhaust had a slight crack on the weld at the monster muffler as well which was repaired.

Once we fired up the engine to check for leaks, we noticed that the car REALLY purred...and actually sounded better than before. But *I* noticed while driving was that the car actually ran a little better and idled better as well.

Can a leaky exhaust have such a LARGE affect on the car's performance?

GamblerZ · 09-06-2002, 07:57 PM

chickenmanq · 09-06-2002, 08:37 PM

I would think it could have a big effect.  For the only reason that you're running O2 sensors and other kinds of emissions crap that will get faulty readings if a certain amount of flow isn't coming down the pipe.  If the O2 isn't getting enough exhaust to meter correctly it will throw off the mixture.

On my 81 Honda, the exhaust leaks like crazy.  Got it out of the junkyard.  Cost=nothing.  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt='

'>  However, the 81 EK1 engines without O2 sensors don't have ECUs, so it doesn't make a hoot of difference.  However, running it open manifold does.  Loud as shit for one, no torque for another.  Really pisses people off.  Hehehehe.

GamblerZ · 09-06-2002, 09:06 PM

O2 sensors?  I have an SR20DET S13 Blacktop.  I don't even have a catalytic converter!

Natty · 09-06-2002, 09:23 PM

Ugh. I have an exhaust leak at the cat and on my muffler.
I would fix it, but a new cat is who-knows how much and a stock muffler is $200!
The only thing that bothers me is that I sound like a ricer when accelerating. Someone shoot me  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>
Jeff

GamblerZ · 09-06-2002, 09:39 PM

Repairing the cracks plus the cost of the resonator was only $60!!!  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>  The guys that worked on my car did an A-1 job as well.  Best money I ever spent on the car.

09-05-2002, 08:57 PM	#1
GamblerZ Zilvia Junkie Join Date: Aug 2002 Location: West Texas Posts: 414 Trader Rating: (1) Feedback Score: 1 reviews	I went to get my car inspected and was promptly turned down when the dealer said I had an exhaust leak which need fixing first. This morning I went to get the leak fixed and found that the exhaust was cracked on both end welds of my resonator on my 3" Blitz Realize TT catback exhaust. Rather than replacing it with a straight pipe, I replaced it a hi-flow glass packed resonator. We also noticed that the exhaust had a slight crack on the weld at the monster muffler as well which was repaired. Once we fired up the engine to check for leaks, we noticed that the car REALLY purred...and actually sounded better than before. But I noticed while driving was that the car actually ran a little better and idled better as well. Can a leaky exhaust have such a LARGE affect on the car's performance? __________________ Visit WTI - WestTexasImports.net

09-06-2002, 07:57 PM	#2
GamblerZ Zilvia Junkie Join Date: Aug 2002 Location: West Texas Posts: 414 Trader Rating: (1) Feedback Score: 1 reviews	ttt __________________ Visit WTI - WestTexasImports.net

09-06-2002, 08:37 PM	#3
chickenmanq Zilvia FREAK! Join Date: Nov 2001 Posts: 1,000 Trader Rating: (0) Feedback Score: 0 reviews	I would think it could have a big effect.  For the only reason that you're running O2 sensors and other kinds of emissions crap that will get faulty readings if a certain amount of flow isn't coming down the pipe.  If the O2 isn't getting enough exhaust to meter correctly it will throw off the mixture. On my 81 Honda, the exhaust leaks like crazy.  Got it out of the junkyard.  Cost=nothing.  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=''>  However, the 81 EK1 engines without O2 sensors don't have ECUs, so it doesn't make a hoot of difference.  However, running it open manifold does.  Loud as shit for one, no torque for another.  Really pisses people off.  Hehehehe. __________________ <img src=http://dana.ucc.nau.edu/~mka/av620b.jpg> -"Yeah? Well Your Mom Drives A Civic Type R!" 81 Honda Accord Hatchback. EK1 engine. 78 Datsun 620. L20B engine. I'll try to have pics soon. Check the website for more. http://dana.ucc.nau.edu/~mka

09-06-2002, 09:06 PM	#4
GamblerZ Zilvia Junkie Join Date: Aug 2002 Location: West Texas Posts: 414 Trader Rating: (1) Feedback Score: 1 reviews	O2 sensors?  I have an SR20DET S13 Blacktop.  I don't even have a catalytic converter! __________________ Visit WTI - WestTexasImports.net

09-06-2002, 09:23 PM	#5
Natty Zilvia Addict Join Date: Dec 2001 Location: Nashville, TN Posts: 944 Trader Rating: (0) Feedback Score: 0 reviews	Ugh. I have an exhaust leak at the cat and on my muffler. I would fix it, but a new cat is who-knows how much and a stock muffler is $200! The only thing that bothers me is that I sound like a ricer when accelerating. Someone shoot me  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'> Jeff __________________ 1991 White 240sx Fastback LE, rusty spoiler, weak driveshaft, exhaust rattle.... Rattles are just your cars way of saying 'I love you.'

09-06-2002, 09:39 PM	#6
GamblerZ Zilvia Junkie Join Date: Aug 2002 Location: West Texas Posts: 414 Trader Rating: (1) Feedback Score: 1 reviews	Repairing the cracks plus the cost of the resonator was only $60!!!  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wow.gif" border="0" valign="absmiddle" alt=':0'>  The guys that worked on my car did an A-1 job as well.  Best money I ever spent on the car. __________________ Visit WTI - WestTexasImports.net