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I know I've only driven my '93 Ultra around 80 miles since the rebuild, but I was wondering why the rear plug (the one on the right) has some carbon deposits on it. Is the back pressure different on that head due to the header y-pipe?
I know I've only driven my '93 Ultra around 80 miles since the rebuild, but I was wondering why the rear plug (the one on the right) has some carbon deposits on it. Is the back pressure different on that head due to the header y-pipe?
-Dave
Touring exhaust (2 into 3) will always run the rear plug a bit darker on the rear with a carburetor.
Your plugs look normal for low mileage / just knocking around.
No worries Dave.
Touring exhaust (2 into 3) will always run the rear plug a bit darker on the rear with a carburetor.
Your plugs look normal for low mileage / just knocking around.
No worries Dave.
Oh, I wasn't worried. The question was more one of technical curiosity. Thanks!
Touring exhaust (2 into 3) will always run the rear plug a bit darker on the rear with a carburetor.
Your plugs look normal for low mileage / just knocking around.
No worries Dave.
Didn't know they came out with new pipes.. 2-3. Did they do that to help with reversion?
Didn't know they came out with new pipes.. 2-3. Did they do that to help with reversion?
They did it just to look good
I just call it that. Front into 1, rear into 2... = 3. But it's more like front into 1 and rear into 1 and 1/8, so far as exhaust flow volume since the left is a short 90 degree at the head. (unless you use my $6 trick to make it true duals)
Probably 2 into 1 and 1/8 would be more accurate. I've been on decaf for nearly a year - gimme a break hotrod
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Spark Plugs
