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Thoughts on stock '69 1275 manifold vs LCB Headers for street use

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Jim_Gruber

Jim_Gruber

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The 948 in Bugsy has a LCB Header all welded together as a single unit. It's got some rough spots where it's been patched and put back together. In order to remove diff. I cut the pipe just in front of rear axle. Muffler shop can fix and install my Harley Sportster muffler. So I remember an article in Classic Motor Sports on A series engines and comparing 3 different stock exhaust manifold, headers, and LCB header. IIRC for street use some of the stock manifolds performed as well as headers. And we're substantially quieter than headers. Thoughts on Header vs stock manifold, hi compression '69' I have from my spare engine. Or could the header on the 948 with 1.625 pipe going to the muffler work on my new 1,326 engine later this summer. Thoughts gentrlemwn on which way to go.
 
We always had headers. 948, 1098, 1275. Don't see any reason not to. Can always be considered a first thing for more things to come...IMHO
 
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Seat of the pants says I get more power from my LCB header than I did from the stock manifold. If you are going to use the manifold that uses a clamp from the outside rather than the late bolt up one I would definitely avoid them. Had lots of trouble trying to get them to seal.

Kurt.
 
It's that initial HTH to get it down to the Muffler Shop with a wide open header. Only 2 -3 miles down the street guess I could always borrow a trailer.
 
Jim_Gruber said:
It's that initial HTH to get it down to the Muffler Shop with a wide open header. Only 2 -3 miles down the street guess I could always borrow a trailer.
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I just drove mine to the shop with an open header - kept the revs mostly low but occasionally savoured the moment. Can't see how you would get a ticket on the way to the shop.
 
As one who has a '69 with a 1275, I don't think the exhaust manifold is anything special. It has has the "1969 Only" flange, so you'd have to get a tailpipe that has the same flange to mate up with it. It's also a pretty heavy chunk of metal. You could probably save yourself a fair amount of weight and get better performance with a header.
 
Hey, Jim, have you been around any Harleys lately? Semi trucks?? No one in power is bothered by noise any more. Drive it to the shop and rod the be-jesus out of it on the way!

Kurt.
 
SaxMan said:
As one who has a '69 with a 1275, I don't think the exhaust manifold is anything special. It has has the "1969 Only" flange, so you'd have to get a tailpipe that has the same flange to mate up with it. It's also a pretty heavy chunk of metal. You could probably save yourself a fair amount of weight and get better performance with a header.
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and, good reminder about the flange - I had them weld a flange on the end of the header so that the exhaust system itself would be removable.
 
nomad said:
Hey, Jim, have you been around any Harleys lately? Semi trucks?? No one in power is bothered by noise any more. Drive it to the shop and rod the be-jesus out of it on the way!

Kurt.
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A Spridget with open headers is still probably quieter than a Harley. After all isn't their motto "Harley-Davidson: Turning gasoline into noise since 1903." :joyous:
 
SaxMan said:
A Spridget with open headers is still probably quieter than a Harley. After all isn't their motto "Harley-Davidson: Turning gasoline into noise since 1903." :joyous:
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These days its hard to believe that when I was in my teens my small town imposed a curfew on motorcycles because our little stock Japanese and British bikes made too much noise!
 
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