Search found 1031 matches

by C3H8
Wed Apr 10, 2019 1:49 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 39
Views: 1255

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

Sorry guys. That was me that mentioned Bennet early on in this post. The guy I was referring to was Dave Bennet. He lived in Minnesota in the USA. Dave developed a system in the mid 90's on Fords where he used the OEM ECU. He installed a special tank from sleegers with an electric pump to maintain a...
by C3H8
Fri Mar 22, 2019 5:14 pm
Forum: Propane Forum
Topic: Musings on Dual Fuel Implementation
Replies: 3
Views: 109

Re: Musings on Dual Fuel Implementation

Forgot. Another EGR benefit. It allowed an increase in timing at cruise because of the lower combustion chamber pressures.
by C3H8
Fri Mar 22, 2019 5:12 pm
Forum: Propane Forum
Topic: Musings on Dual Fuel Implementation
Replies: 3
Views: 109

Re: Musings on Dual Fuel Implementation

That's quite a project with many upsides. The only comment I can add would be its too bad you eliminated the EGR. EGR's are one of the true better emission devices manufacturers installed that did everything intended. A properly functioning EGR improves economy during cruise and lowers combustion te...
by C3H8
Fri Mar 22, 2019 5:01 pm
Forum: Propane Forum
Topic: What does the RCV valve do ?
Replies: 3
Views: 102

Re: What does the RCV valve do ?

Add to that. It is only used with fuel control systems that use vacuum to control the secondary diaphragm. The standard orifice bleed hole in the fuel control fitting was not large enough to allow rapid response of the secondary diaphragm. The regulator control valve would open if the throttle was f...
by C3H8
Thu Mar 21, 2019 2:43 am
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 284

Re: Additional mixture base leaning

There is still something that does not make sense here. From the day they were first produced 200 and 225 series mixers have been notorious for being lean at idle. Also as you state the mixer is on the large size for your engine. I that case it should even be leaner since the air flow would be reduc...
by C3H8
Mon Mar 11, 2019 1:26 pm
Forum: Propane Forum
Topic: Bought my first propane van
Replies: 9
Views: 250

Re: Bought my first propane van

Whoops? A bit of a problem here. An Autotronics 8789 is made for GM vehicles not Dodge. Are you sure you got the number right. Depending on what they intended on the installation I guess you could adapt it to work on your vehicle as an O2 fix. That would be the only function the 8789 could be used f...
by C3H8
Sun Mar 10, 2019 3:33 am
Forum: Propane Forum
Topic: Bought my first propane van
Replies: 9
Views: 250

Re: Bought my first propane van

I'm going to assume you have the 5.9L engine in that van. Let's face it, you just described it as a raised roof and weighing in at 7000 lbs. Realistically you aren't going to get great mileage from that vehicle no matter the fuel. The same set up in a 1/2 or 3/4 ton truck weighing 5500 lbs could onl...
by C3H8
Sun Feb 24, 2019 2:51 am
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 284

Re: Additional mixture base leaning

You can use leaning rings to lower the valve. They go between the gas valve and the diaphragm lowering the gas valve into the bore. They are approximately .003" thick and several can be used if required. The IMPCO part # is R1-30. They come in brass or plastic.
by C3H8
Thu Feb 21, 2019 1:21 pm
Forum: Propane Forum
Topic: Modern setup vs. ancient factory propane specs on tractor
Replies: 16
Views: 525

Re: Modern setup vs. ancient factory propane specs on tractor

All to do with the basic operation of an IMPCO mixer. At no load the airflow through the mixer is very slow and the gas valve barely open. Lowering the idle speed reduces the air flow and the gas valve virtually closes. With the load the air flow is higher and the air/gas valve is pulled open a lot ...
by C3H8
Tue Feb 19, 2019 1:35 pm
Forum: Propane Forum
Topic: Modern setup vs. ancient factory propane specs on tractor
Replies: 16
Views: 525

Re: Modern setup vs. ancient factory propane specs on tractor

Fuel efficiency on gasoline in older vehicles could be very erratic. They typically had very rich mixtures to keep them running cold using a choke. This was because of really poor atomization of the gasoline and much of the liquid droplets would get stuck on the intake manifold walls until the engin...
by C3H8
Sat Feb 02, 2019 1:46 pm
Forum: Propane Forum
Topic: Vaporizer temperature, contaminants, and separate thermostats
Replies: 6
Views: 214

Re: Vaporizer temperature, contaminants, and separate thermostats

All propane is contaminated to a small amount with heavy ends. Take the specification for automotive propane in Canada. It specifies HD5 as 90% propane, 5% Butane, and 5% of other products. The last 5% are typically the items referred to as heavy ends. They are the small amounts of oil and contamina...
by C3H8
Wed Jan 16, 2019 8:04 pm
Forum: Propane Forum
Topic: Pros vsi
Replies: 5
Views: 161

Re: Pros vsi

Also a possibility that the filter is also the split for the rail supply. Single hose in and double out.
by C3H8
Wed Jan 16, 2019 8:03 pm
Forum: Propane Forum
Topic: Pros vsi
Replies: 5
Views: 161

Re: Pros vsi

Normally there are two. One at the entrance to the Liquid lockoff or somewhere in the line between the tank shut off and the lock off under the hood. The other will be in the vapour line coming out of the regulator going to the fuel rails where the injectors are mounted. The line should split to sen...
by C3H8
Tue Jan 15, 2019 6:24 pm
Forum: Propane Forum
Topic: Air line oiler as simple valve lubricator
Replies: 17
Views: 362

Re: Air line oiler as simple valve lubricator

It won't increase the blow torch affect. Typically this only happens once a seat is leaking. The one thing to watch for it the quantity of lube added. Too much and you may begin to build up a deposit on the intake valve stems eventually blocking air flow. That's why Flash Lube and Mystery oil from d...
by C3H8
Tue Jan 15, 2019 6:13 pm
Forum: Propane Forum
Topic: Pros vsi
Replies: 5
Views: 161

Re: Pros vsi

Could use a few more details. What brand of equipment are you running? Is it injected or carbureted. If it's injection and a Prins system or similar it could be as easy as a dirty fuel filter. The key reason injected systems return to gasoline is the fuel rail pressure drops below a minimum pressure...