Pingel does it...
98valk:
so I modified the OEM petcock so vacuum is not needed as done here
http://www.valkyrieforum.com/bbs/index.php/topic,37577.0.html
and I did some drilling to increase the outlet fuel flow which wouldn't work for an OEM with the vacuum function.
side note the OEM petcock is good solid aluminum and not like the soft aluminum/metal the thermostat housing is made of.
98valk:
Quote from: Mooskee on September 08, 2025, 09:45:21 AM
Quote from: 98valk on September 07, 2025, 03:13:18 PM
Quote from: Chrisj CMA on September 07, 2025, 03:02:15 PM
Quote from: 98valk on September 07, 2025, 02:43:06 PM
flow more than the OEM fuel valve? thanks
A petcock only flows what is demanded of it by the carburetor(s). The Pingle is Capable of delivering a higher volume of fuel than the OEM. The factory petcock can deliver everything your Valkyrie can demand when working properly. However, any degradation of function and the factory unit can starve your engine of fuel in a high demand situation.
that's what I should've asked, volume. I'm running ported heads, modified air box and Viking exhaust.
so is the pingel only bottom lever? and is there any other companies with a side lever like oem?
When Attic Rat does his GLH mod, he increases compression, fly cuts the pistons, ports, polishes, and modifies the Airbox among other things. I do not know what jets he uses. He is increasing HP and uses an OEM petcock. My trike has stock exhaust. A more open exhaust may require rejetting larger to tune.
I changed my bikes to Pingels to eliminate the vacuum line to #6. One failure mode of the OEM petcock can allow fuel to run down the vacuum line into the #6 cyl, causing hydrolock.
I don't have any trouble with the Pingel. However if I had it to do over, I would use a CBR600 petcock which will connect to the fuel selector knob, but is manual, so no vacuum line.
When I build carbs for people with Cobra exhaust and no baffles, I rejet with 38/108 with no fuel flow issues on an OEM petcock.
The Pingel is advertised as a high flow petcock, but from what I said about the Attic Rat mod, I suspect the OEM petcock can deliver enough fuel.
Of course this is all my opinion,based on my experience. We all know what an opinion is worth.
too rich on the Pilot Jet. I run 38s with high velocity heads and exhaust, and the intake tubes into the carbs are straight and not curved.
better to run oem 35s and open up the mixture screws more. Marc from factorypro talks about it here
http://www.factorypro.com/tech/tech_tuning_procedures/tuning_pilot%20jet,%20affect%20of%20size%20on%20idle%20and%20cruise.html
Mooskee:
Quote from: 98valk on September 10, 2025, 09:12:30 AM
Quote from: Mooskee on September 08, 2025, 09:45:21 AM
Quote from: 98valk on September 07, 2025, 03:13:18 PM
Quote from: Chrisj CMA on September 07, 2025, 03:02:15 PM
Quote from: 98valk on September 07, 2025, 02:43:06 PM
flow more than the OEM fuel valve? thanks
A petcock only flows what is demanded of it by the carburetor(s). The Pingle is Capable of delivering a higher volume of fuel than the OEM. The factory petcock can deliver everything your Valkyrie can demand when working properly. However, any degradation of function and the factory unit can starve your engine of fuel in a high demand situation.
that's what I should've asked, volume. I'm running ported heads, modified air box and Viking exhaust.
so is the pingel only bottom lever? and is there any other companies with a side lever like oem?
When Attic Rat does his GLH mod, he increases compression, fly cuts the pistons, ports, polishes, and modifies the Airbox among other things. I do not know what jets he uses. He is increasing HP and uses an OEM petcock. My trike has stock exhaust. A more open exhaust may require rejetting larger to tune.
I changed my bikes to Pingels to eliminate the vacuum line to #6. One failure mode of the OEM petcock can allow fuel to run down the vacuum line into the #6 cyl, causing hydrolock.
I don't have any trouble with the Pingel. However if I had it to do over, I would use a CBR600 petcock which will connect to the fuel selector knob, but is manual, so no vacuum line.
When I build carbs for people with Cobra exhaust and no baffles, I rejet with 38/108 with no fuel flow issues on an OEM petcock.
The Pingel is advertised as a high flow petcock, but from what I said about the Attic Rat mod, I suspect the OEM petcock can deliver enough fuel.
Of course this is all my opinion,based on my experience. We all know what an opinion is worth.
too rich on the Pilot Jet. I run 38s with high velocity heads and exhaust, and the intake tubes into the carbs are straight and not curved.
better to run oem 35s and open up the mixture screws more. Marc from factorypro talks about it here
http://www.factorypro.com/tech/tech_tuning_procedures/tuning_pilot%20jet,%20affect%20of%20size%20on%20idle%20and%20cruise.html
If I wanted your frigging advice, I would have asked for it. Im pretty tired of your unsolicited opinions. Don't bother to ever respond to me again.
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