Search found 1128 matches

by C3H8
Fri Mar 01, 2024 12:36 am
Forum: Propane Forum
Topic: SBC 4mpg
Replies: 7
Views: 1330

Re: SBC 4mpg

We would have liked to help but your not vey good at supplying any of the info asked for in a previous post. Since we haven't heard from you I have to expect you went back to the basics and solved your problem.
by C3H8
Tue Jan 09, 2024 12:21 am
Forum: Your Car
Topic: No start,Quick start.
Replies: 5
Views: 1166

Re: No start,Quick start.

The reason for the lack of responses is you are posting in the wrong area. Many newcomers post in this area to introduce themselves, however most of the members go straight to the Propane index forum to look for members asking for help. Most don't notice posts in the Introduce yourself area. So, a q...
by C3H8
Mon Jan 08, 2024 11:58 pm
Forum: Propane Forum
Topic: What size is the large O ring in OHG mixer
Replies: 7
Views: 1539

Re: What size is the large O ring in OHG mixer

What most newbies don't realize is that this gap is the air vent that allows the piston to move back down after vacuum pulls it up. Many think the o'ring is broken and will either try to glue it together or put on a similar o'ring that is intact. The gap is important to provide proper lift and to al...
by C3H8
Thu Jan 04, 2024 3:18 pm
Forum: Propane Forum
Topic: What size is the large O ring in OHG mixer
Replies: 7
Views: 1539

Re: What size is the large O ring in OHG mixer

OHG X450 O'ring data.

Diameter: 2.6MM or .098"
Length: 12.25" or 31CM or 310MM

Trim length to allow small gap between ends. Approximately 1/32" to 1/16"

Material: Unknown but appears to be the same as a standard black o'ring.
by C3H8
Wed Jan 03, 2024 1:32 pm
Forum: Propane Forum
Topic: What size is the large O ring in OHG mixer
Replies: 7
Views: 1539

Re: What size is the large O ring in OHG mixer

I should have also mentioned, check the colour of the secondary spring in the regulator. To use it with an OHG mixer it should be orange in colour. Blue works with IMPCO 425. Orange, the 1/2" WC, works with the X450.
by C3H8
Wed Jan 03, 2024 1:29 pm
Forum: Propane Forum
Topic: SBC 4mpg
Replies: 7
Views: 1330

Re: SBC 4mpg

You need to supply some additional information. Have you done any checks on the basic components. Compression: If you have never verified the condition of the engine do a compression test. Spark plugs: New and gap at .035. Cap and Rotor: Condition and replace if not sure how old. Plug wires: Same as...
by C3H8
Wed Jan 03, 2024 1:19 pm
Forum: Propane Forum
Topic: Truck is running great except…..
Replies: 1
Views: 526

Re: Truck is running great except…..

Where are you located. As I stated in your other post I know a local dealer in Winnipeg that has 3 or 4 of the 450 mixers on the shelf. He is willing to sell them. I can find out the price if you want. PM the information to me.
by C3H8
Wed Jan 03, 2024 1:15 pm
Forum: Propane Forum
Topic: What size is the large O ring in OHG mixer
Replies: 7
Views: 1539

Re: What size is the large O ring in OHG mixer

I have a local dealer with a couple of used ones in stock. I'll go by there in the next couple of days and verify the size. I can't verify the material. It appears to be regular o'ring material. Maybe one of the other members know what it is made of.
by C3H8
Fri Oct 27, 2023 12:16 am
Forum: Propane Forum
Topic: Won't idle
Replies: 5
Views: 1336

Re: Won't idle

Sorry you didn't get immediate responses. An increased idle speed is almost always a major vacuum leak somewhere. 3000 rpm usually is an intake manifold gasket sucked in at the front or rear of the manifold. The end gaskets have a tendency to fall off the small ledge when placing the intake in posit...
by C3H8
Fri Oct 27, 2023 12:11 am
Forum: Propane Forum
Topic: What size is the large O ring in OHG mixer
Replies: 7
Views: 1539

Re: What size is the large O ring in OHG mixer

Measure the old one with calipers unless your talking diameter. This is not really an o'ring. It's just a straight piece of rubber like material. There needs to be a small gap between the ends when installed to allow the piston to move other wise vacuum will prevent the piston from moving up down. m...
by C3H8
Fri Oct 27, 2023 12:05 am
Forum: Propane Forum
Topic: What mixer to use with supercharer
Replies: 2
Views: 1049

Re: What mixer to use with supercharer

I would think the 300's would be preferred. The 450's will give you over 1000 CFM. Also repair parts are harder to get for the OHG's. At 6 PSI you will likely max out at about 650 CFM depending on the rpm capability of the 400.
by C3H8
Sat May 20, 2023 5:19 pm
Forum: Propane Forum
Topic: Rebuild engine on LPG
Replies: 3
Views: 1751

Re: Rebuild engine on LPG

Engine rebuilders typically make this statement because they have experience with chrome rings that were used in some engines and probably still available today. Dodge used a top chrome compression ring in the slant six engines that was miserable to seat. These engines burned oil for the first 1500 ...
by C3H8
Sat May 20, 2023 5:00 pm
Forum: Propane Forum
Topic: questions about Impco E-regulator
Replies: 12
Views: 8588

Re: questions about Impco E-regulator

In this case I am talking about the primary seat spring. It is shaped like a barbell. It sits in a groove in the casting holding the primary seat open until fuel enters the regulator and pushes against the primary diaphragm. That is the triangle shaped diaphragm that operates the primary pin. There ...
by C3H8
Sun May 07, 2023 5:01 pm
Forum: Propane Forum
Topic: Propane cam selection questions/advice
Replies: 9
Views: 6263

Re: Propane cam selection questions/advice

Yes and no. It depends on when the mixer was made. Early versions had an adjustable power valve right at the mixer vapour inlet. For some reason that was removed on newer versions. Adjusting the cruise is a possibility but can be difficult ad the adjustment has to be in very small amounts. The mixtu...
by C3H8
Mon May 01, 2023 5:13 pm
Forum: Propane Forum
Topic: questions about Impco E-regulator
Replies: 12
Views: 8588

Re: questions about Impco E-regulator

I should have added. Your hot start issue is probably the beginning of a primary seat failure. The seat eventually cuts itself into the base ring and can leak. The mixtures are probably very rich initially causing poor running. The other possibility is the primary seat barbell shaped spring steel th...