Search found 1202 matches

by franz
Sun Jun 07, 2015 7:08 pm
Forum: Propane Forum
Topic: Sad to see it go!
Replies: 6
Views: 5379

Re: Sad to see it go!

The raw aluminum and zinc castings on the mixer and vaporizer bodies oxidizes fast. If I had a walnut shell tumbler I MIGHT be able to salvage some of them but thats more work than I have time for with little in return.

Franz
by franz
Fri Jun 05, 2015 9:37 pm
Forum: Propane Forum
Topic: Sad to see it go!
Replies: 6
Views: 5379

Re: Sad to see it go!

I'm going back over to the storeroom tomorrow and triage what I have left. I'll box up what is obviously good and saleable, separate the questionable items, and trash anything that was wet. If anything is worth using, I will post in a couple of weeks. As for any OHG mixers, its been a LONG time sinc...
by franz
Fri Jun 05, 2015 11:50 am
Forum: Propane Forum
Topic: Sad to see it go!
Replies: 6
Views: 5379

Sad to see it go!

As some of you know, we live in Central Texas, where all the recent heavy rains and flooding have taken place. We were relatively unaffected by the floods, but the rain was another story. My store room was flooded and many items I have from surplus and acquisition over my career were severely water ...
by franz
Sat May 30, 2015 10:53 pm
Forum: Propane Forum
Topic: Al-gas 60 mixer ,, c-250a reg.
Replies: 8
Views: 5603

Re: Al-gas 60 mixer ,, c-250a reg.

Oh, geez, old memories in from the fog. The mixer uses positive pressure from the vaporizer regulator in this version. For some reason, Algas liked to use light positive pressure, I forget the actual number but its in the low inches of water column pressure. Also, the regulator has had a history of ...
by franz
Fri Apr 10, 2015 11:43 am
Forum: Propane Forum
Topic: What's this plunger for? (OHG X450)
Replies: 16
Views: 10222

Re: What's this plunger for? (OHG X450)

For pipe threads, I prefer Teflon paste. Rectorseal is a widely recognized threadseal. It seams that every time I had a threaded joint leak, it was with tape. I use it for water joints but no longer for threaded gas joints, and that includes high pressure CNG if that makes any difference.

Franz
by franz
Thu Apr 09, 2015 4:23 pm
Forum: Propane Forum
Topic: What's this plunger for? (OHG X450)
Replies: 16
Views: 10222

Re: What's this plunger for? (OHG X450)

You may leave it intact, I am in the process of filing a formal Violation of Copyright against the site in question. Everyone who has obtained this book via legal means is clear, that includes anyone who received my book by me personally or through one European contact who has my permission to distr...
by franz
Thu Apr 09, 2015 9:31 am
Forum: Propane Forum
Topic: What's this plunger for? (OHG X450)
Replies: 16
Views: 10222

Re: What's this plunger for? (OHG X450)

That site doesnt have my permission to show that book and is indeed in violation of my copyright. I will be contacting them. For what its worth, I dont know that publisher nor did I give them permission to show my book. I may put the book up for sale on my site, thanks for suggesting Frank. I've bee...
by franz
Sat Apr 04, 2015 9:47 am
Forum: Propane Forum
Topic: What's this plunger for? (OHG X450)
Replies: 16
Views: 10222

Re: What's this plunger for? (OHG X450)

Thanks for the plug, Storm. The piston serves two purposes, the one you mentioned, where it allows extra fuel, plus it closes the vent to the top cover, allowing the air valve to raise, decreasing air restriction. By the air valve lifting, the metering pins also raise, allowing additional fuel, some...
by franz
Sat Mar 28, 2015 5:39 pm
Forum: Propane Forum
Topic: Propane Vapor Barrier
Replies: 7
Views: 5013

Re: Propane Vapor Barrier

The problem is that the relatively low ice temperature increases the relative density of propane where it starts to assume some of the properties of a liquid. Not yet a liquid but it begins to be "lazy" and wants to settle before ignition. Those in colder climates might relate to this better than I,...
by franz
Sat Mar 21, 2015 11:08 am
Forum: Propane Forum
Topic: Heavy towing
Replies: 23
Views: 13097

Re: Heavy towing

You hit it on the head when you said the cooling system must be kept top notch. The model E can provide continuous fuel for about 325 bhp when at full operating temp at 100 deg C. Many people want to put in 160 deg thermostats and that causes problems with the vaporizer along with oil gumming. The m...
by franz
Thu Jan 15, 2015 10:21 am
Forum: Propane Forum
Topic: 454 valve seats
Replies: 21
Views: 15570

Re: 454 valve seats

In a civilized manner, I respectfully add that any reference to ideal air-fuel ratios and the perfect ignition timing are moot points. Combustion chamber and piston crown shapes, bore to stroke relationships, cam timing and overlap, valve position, and compression ratios all play a factor. For many ...
by franz
Wed Jan 07, 2015 3:37 pm
Forum: Propane Forum
Topic: 425 w/ 'just' four throttle plate screws...
Replies: 9
Views: 5889

Re: 425 w/ 'just' four throttle plate screws...

On more than one conversion I had the throttle blades rub against a mis-aligned gasket causing the problem you describe. A binding throttleshaft would be due to a warped baseplate or mixer body, neither of which I have seen before. Also, be sure you block the center screw opening on the throttle pla...
by franz
Wed Jan 07, 2015 3:32 pm
Forum: Propane Forum
Topic: IMPCO endorsed mod ? air bleed hole sizes
Replies: 5
Views: 4166

Re: IMPCO endorsed mod ? air bleed hole sizes

Like C3H8 stated, the holes are there to transfer vacuum, with the blockage providing the results he stated. The hand written number indicates a flow bench rating as compared to a reference unit. Generally speaking, numbers below "90" are lean biased while numbers above that are rich biased. I have ...
by franz
Wed Sep 17, 2014 8:59 am
Forum: Propane Forum
Topic: Decision Time: X-450a or Impco 425
Replies: 6
Views: 5926

Re: Decision Time: X-450a or Impco 425

I've been very busy working on my consulting business that I missed the last couple of posts. I do not know of Mr. Mullen and look forward to reading his input as well. My experience with ANY of the air-valve mixers when placed above a standard carburetor is that it alters the metering, enough that ...
by franz
Mon Sep 08, 2014 8:44 am
Forum: Propane Forum
Topic: Decision Time: X-450a or Impco 425
Replies: 6
Views: 5926

Re: Decision Time: X-450a or Impco 425

The X-450 can be modified for vacuum lift for dual fuel use. You will need to remove the top cover and drill the very top for a vacuum fitting, then to a solenoid connected to a switch when on gasoline. Be sure the vacuum fitting is in the very top and not the side. Clearance may be an issue. Be adv...