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Old 08-08-2007, 05:47 PM   #51
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Downpipe is 3" to a 2.5 " reducer into the resonator which comes out 2.25" on to the Split T which goes down to 1 3/4 for each muffler . :(

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Old 08-08-2007, 06:41 PM   #52
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Quote:
Originally Posted by BillBoost37
You lost all the torque because you decreased back pressure. Add a back pressure piece back in and you'll probably get torque back.

Trust me.. headers kill low end to a certain degree, which is why we always tell people that changing the exhaust size is bad.
Adding "backpressure" (atleast the automotive term) KILLS power. If his exhaust is too big, adding the correct size shouldn't add backpressure, but increase flow rates.

Headers don't necessarily kill low end power either, but they remove restrictions to top end power, and make the entire powerband smoother. This is of course, if they're properly sized in both primaries and collectors.
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Old 08-09-2007, 12:27 AM   #53
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Thanks for the analysis..

Club experience and my own personal was the basis for my post. With both of us having S2 L67'* with headers..I thought my experience would be relevant..


Adding headers w/o flow dropped some low end torque and allowed the top end to flow. Being in NYC....he'* probably not seeing much top end driving.

E... I was thinking.. you didn't change or regap your plugs. What are they?
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Old 08-09-2007, 01:42 AM   #54
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NGK TR55s gapped at .055 or .054 IIRC.
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Old 08-09-2007, 08:32 AM   #55
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O2 readings at WOT?
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Old 08-09-2007, 10:13 AM   #56
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DOH! We forgot to check 02 readings at WOT last night. But I am getting misfires . Time to get new plugs.
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Old 08-09-2007, 10:25 AM   #57
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Do you need plugs?
Do you need better fuel pressure? (did you find the vise grips I put on your fuel line?)
Need to find out what is causing the KR.
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Old 08-09-2007, 07:55 PM   #58
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Update: Captians Log Stardate 08090.7

I had the car on lift today and discovered that car is leaking exhaust from the clamps on the Y-pipe and from the downpipe gasket. Going to put car on lift tomarrow to try to remedy the situation.


End log
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Old 08-10-2007, 09:06 AM   #59
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You didn't fix it while it was in the air?
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Old 08-10-2007, 09:40 AM   #60
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Didn't have the material on hand. Today I may try to copper RTV the heck ot of it.
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