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Author Topic: Pingel petcock  (Read 153 times)

Online The norm

Pingel petcock
« on: August 03, 2019, 01:59:27 PM »
I thought I would pass on the pingel for our R's with reserve for anyone interested. http://www.pingelonline.com/dirt-atv-fuel-valves/4111-ah615ang.asp

Loren
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Online hickwheeler

Re: Pingel petcock
« Reply #1 on: August 03, 2019, 02:01:02 PM »
Nice Loren, I didn't realize they made one with a reserve.
88 hybrid 431 puma
88 (BOF Build) stock motor and oem 89 plastics
More in the works

Online hickwheeler

Re: Pingel petcock
« Reply #2 on: August 03, 2019, 02:02:59 PM »
I might be a little concerned if it gets the same flow as the non reserve one. Just me thinking
88 hybrid 431 puma
88 (BOF Build) stock motor and oem 89 plastics
More in the works

Online The norm

Re: Pingel petcock
« Reply #3 on: August 03, 2019, 05:16:07 PM »
I asked the pingel guy and Pete about that. They both say that it will flow plenty of fuel
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Offline jcs003

Re: Pingel petcock
« Reply #4 on: August 03, 2019, 08:38:27 PM »
never seen a pingel with a reserve option.  is this a new thing?

Online The norm

Re: Pingel petcock
« Reply #5 on: August 03, 2019, 09:04:41 PM »
I'm not sure
1986 Trx250r-- Hybrid Engineering 391(Good bye super 310)
1986 Trx250r-- Hybrid Engineering  ported stock 86 cylinder
1986 Trx250r-- craigslist engine with unknown ported 89 cylinder.
1985 Atc250r-- Needs a lot of work (Super 310's new home)

Offline Skeans1

Re: Pingel petcock
« Reply #6 on: August 05, 2019, 05:19:12 AM »
You use to be able to build one with their flanges, nice to see they actually put it together as a kit

Offline Jerry Hall

Re: Pingel petcock
« Reply #7 on: August 05, 2019, 11:56:29 AM »
I instruct all of my customers to ALWAYS run their petcocks in the reserve position.  Petcocks obtain their fuel from the lowest level in most fuel tanks when positioned in the reserve position.  Petcocks obtain their fuel from a stand pipe that may be 2 or more inches from the bottom of the fuel tank when placed in the on position.  High performance two strokes that are highly tuned, can burn a piston in less than a couple of seconds or so when the air fuel mixture becomes too lean. 

I have seen a large number of pistons torched on engines that had the petcock positioned in the on position.  The fuel level in the float bowl does not stay consistent when the fuel tank level becomes low enough to not keep the stand pipe on the petcock completely submerged 100% of the time. 

As the fuel level in the fuel tank becomes lower and lower and the fuel is sloshing around, the stand pipe is not providing fuel to the float valve 100% of the time.  The inconsistent fuel supply to the float valve causes the fuel level in the float bowl to stay lower for longer periods of time until the lean condition causes a piston failure. 

A two stroke will need a fuel flow rate through the carburetor of at least 6 gallons per hour when developing around 70 hp.  You will never use 6 gallons per hour if your engine develops 70 hp but the fuel supply past the float valve must be at least 6 gallons per hour any time the engine is developing 70 hp to keep it from going lean for the period of time it is at that power level. 

A flow test with a full tank will provides a lot more fuel pressure and flow, so always perform this flow test when the fuel level in the tank is 1 to 2 inches from the bottom of the tank.
« Last Edit: August 05, 2019, 12:15:09 PM by Jerry Hall »