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Uneven exhaust pressure???
I'm stumped... I have uneven exhaust pressure at the end of the tail pipes.
I've just completed my engine rebuild and started it up. I started the engine and began the run in process. 3500 RPMs for 20 minutes. Runs great, smooth as silk, oil pressure good, Oil temp good. Here's where I'm stumped. One bank of the exhaust puts out about twice the pressure as the other. The exhaust consists of headers and megaphones. No crossover at all. Can anyone explain this? Should I be worried? Thanks David
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1970 914-6 GT Track Car 1974 IROC Track Car 1987 911 Targa 3.2 2008 BMW X5 |
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06-28-2010, 11:45 AM
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,478
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sounds like compression check time.
How close are your cams matched? Bruce |
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06-28-2010, 12:23 PM
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Cams came out dead on.
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1970 914-6 GT Track Car 1974 IROC Track Car 1987 911 Targa 3.2 2008 BMW X5 |
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06-28-2010, 12:28 PM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Do a leakdown.
This lets you know how the rings are seating.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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06-28-2010, 02:12 PM
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Most likely just a miss match on the throttles. One bank is open more than the other. Disconnect the cross link and rev each side individually. I bet they'll be the same.
-Andy
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72 Carrera RS replica, Spec 911 racer |
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06-28-2010, 04:10 PM
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1974 RSR
