JekRankin
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| posted on 30/1/19 at 12:33 PM |
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R1 manifold glowing in the dark at idle
As per the title, I noticed my r1 manifold was glowing red in the dark last night when warming up from idle. I don’t think the glow would have been
visible in daylight, though.
Is this normal? The pipes to Cylinders 1 and 4 looked a bit hotter than the others.
Jek
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nick205
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| posted on 30/1/19 at 01:34 PM |
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Not seen an exhaust manifold that hot apart from on racecars and even then they have to be on a fully warmed engine and when the engine's
rev'd very hard.
Have you taken the spark plugs out to have a look and see if they tell you anything about the running temperature and air/fuel mixture?
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JekRankin
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| posted on 30/1/19 at 01:39 PM |
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Not had a look at the plugs yet, but I'll do that next.
Should add that it was a pretty faint glow, and probably only visible because it was dark. Under torchlight, they looked normal.
Jek
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nick205
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| posted on 30/1/19 at 02:32 PM |
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Cast iron or tubular manifold?
My MK Indy (2.0 Pinto) had a tubular manifold. It was heat wrapped, but I still would be surprised if it had been that hot at idle.
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JekRankin
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| posted on 30/1/19 at 02:39 PM |
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It's a tubular stainless steel manifold.
Jek
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CosKev3
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| posted on 30/1/19 at 02:43 PM |
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Running lean I would guess.
Turbo charged manifolds glow lovely in the dark,but NA not so much if the fueling/timing is correct
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perksy
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| posted on 30/1/19 at 05:36 PM |
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Possibly running Lean and needs checking sooner rather than later
Especially if two of the primaries are different colours
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Theshed
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| posted on 30/1/19 at 06:17 PM |
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Or the timing is retarded - More likely I think.
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clive7883
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| posted on 31/1/19 at 10:21 AM |
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it is not unusual for Japanese multis exhausts to glow, in the original bike the exhaust headers would most likely have been double walled so they
don't glow, also they are in the airflow which cools them a little, the glowing is due to the port/cam timing, to get the sort of Horse power
that these little engine produce they have to run quite radical cams. By all means double check everything and if it is all correct don't worry
to much.
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redturner
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| posted on 31/1/19 at 10:43 AM |
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Do a plug check and also go through the ignition timing. Even cast iron manifolds will glow if the ignition is out a bit...
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Mr Whippy
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| posted on 31/1/19 at 12:15 PM |
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the pinto in my JBA had a tubular exhaust and it only glowed after a run never at idle
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JekRankin
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| posted on 31/1/19 at 01:58 PM |
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Thanks for the responses.
Like most BECS, i'm using the stock ECU, so ignition mapping isn't possible.
I can trim fuelling using the Power Commander, but for now it is stock, and I'm sure I've read that the stock fuel map tends to run lean
in a car installation.
I've since had a look around a few bike forums, and it seems to be fairly common observation for the manifold to have a faint glow in low light
levels. As I mentioned earlier, I don't think any glow would have been visible if it were daylight.
It was the first time I've had the thing hot enough for the fan to kick in properly, so perhaps I'm being over cautious. That said,
I'll tread carefully and give the plugs a check tonight.
Jek
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JekRankin
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| posted on 31/1/19 at 02:00 PM |
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Almost forgot -
There are two small right angled air inlets on top of the throttle bodies which I assume are usually connected to the airbox? It's a 2003 R1...
Can anyone tell me what these are for, and where they should be connected in an install with no airbox. They look to have small filters in them.
Jek
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nick205
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| posted on 31/1/19 at 03:35 PM |
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quote:
Originally posted by JekRankin
Almost forgot -
There are two small right angled air inlets on top of the throttle bodies which I assume are usually connected to the airbox? It's a 2003 R1...
Can anyone tell me what these are for, and where they should be connected in an install with no airbox. They look to have small filters in them.
Jek
Idle air baypass maybe?
I know on Peugeot 205 GTI injection engines they have an idle air bypass. When the throttle butterfly is closed it lets enough air in (around the
butterfly) for the engine to idle.
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JekRankin
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| posted on 31/1/19 at 04:36 PM |
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Hi Nick,
Ah that would make sense, I think you are probably right.
Jek
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nick205
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| posted on 31/1/19 at 05:15 PM |
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Would make sense if they're connected to the air box so the air is filtered on it's way in.
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x_flow57
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| posted on 1/2/19 at 07:33 AM |
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quote:
Originally posted by clive7883
it is not unusual for Japanese multis exhausts to glow, in the original bike the exhaust headers would most likely have been double walled so they
don't glow, also they are in the airflow which cools them a little, the glowing is due to the port/cam timing, to get the sort of Horse power
that these little engine produce they have to run quite radical cams. By all means double check everything and if it is all correct don't worry
to much.
Agree my unmodified sports bikes front pipes would glow when warming it up before a ride.
[Edited on 1/2/19 by x_flow57]
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JekRankin
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| posted on 1/2/19 at 08:38 AM |
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That's good to know.
So I had a look at the plugs and there's no signs evidence of lean running.
Hopefully all is well, and I'll get the fuelling tuned properly after IVA.
Jek
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40inches
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| posted on 1/2/19 at 10:25 AM |
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quote:
Originally posted by x_flow57
quote:
Originally posted by clive7883
it is not unusual for Japanese multis exhausts to glow, in the original bike the exhaust headers would most likely have been double walled so they
don't glow, also they are in the airflow which cools them a little, the glowing is due to the port/cam timing, to get the sort of Horse power
that these little engine produce they have to run quite radical cams. By all means double check everything and if it is all correct don't worry
to much.
Agree my unmodified sports bikes front pipes would glow when warming it up before a ride.
[Edited on 1/2/19 by x_flow57]
My ZX9R engine would glow dark red warming up, after a hard run would light up the garage
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