924Board.org

[augidog]

Seems like a good price and I now have a Manifold leak on #4, which is overheating my starter. I’m not racing but everyday driver and don't want to be annoyingly loud but would like a little performance boost.
It’s Time for a header.
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1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

[Vince Ponz]

I put a Bursch on a long time ago and after a short while it fell apart.

Get in touch with Stahl headers in York PA. Much better quality. I think they made them originally for Holbert.
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

[John Brown]

[CBass]

Depending on the header, it can provide a definate boost for low end torque around town. A well designed header with a merge collector will show definate torque gains across the entire RPM band over the same header with a regular collector, when the header is not a restriction.

That being said, OEM gaskets are about $1.50 a piece, and $8 for the manifold/downpipe connection. I went over the pieces with a die grinder when I had them off the car, as the welding at the flange for the downpipe was quite obtrusive, took me about 20 mins with a carbide bit to get it smooth and round. The cast manifold itself didn't need too much cleanup, but it could have stood getting sandblasted with an abrasive media for a couple minutes...
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'81 931 in various states of assembly

[emoore924]

I've had two bursch headers on my na 924.

The first cracked the #3 pipe about 2" from the exit of the head. Fatigue? Too lean heat? Beats me.

The second I had jet-hot coated before I put it on. Its been on the car since 95 and looks *perfect* even after thousands of race miles. Never had a problem. Also, the creamic coating reduces the under-hood heat. Best $150 I've spent on that car.

For the street? I've always had my bursch connected to a straight pipe and a supertrapp. "Ear splitting" comes to mind as the sound levels are pretty intolerable and would be unacceptable for the street. (...although I DO so enjoy taunting my neighbor's hounds by blasting by their house, full on, with the diffuser disks off the supertrapp )

I have run with a dyna flow muffler with this setup for Lime Rock and that does tame the noise considerably -- easily to street level.

As for what it does to the power, I really don't have much of a feel for that becuase I've never run the car without it. I can say that it is one of the fastest 924's out there but there are so many other factors that the header would only really be a small part of the picture.

[augidog]

After reading these posts, I'll save my money toward some new tires. Thanks to all.
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1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

[Vince Ponz]

If you need tires go to Stahl headers in York Pa. Naw just kidding
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

[timstar92404]

I'm getting an entire new exhuast built but I'm probably going to keep my exhaust manifold if it is not cracked and leaking probably just needs new gaskets put on.
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78 924 sold.
85.5 944