Search found 394 matches

by BigBlockMopar
Mon Apr 13, 2020 5:13 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

I fully agree pressure-checks will pinpoint to the problem-area quickly and I can understand seeing someone 'work around' this can be hard to look at ... but, getting proper gauges installed, and viewable from the cabin, with an asortment of T's, lines and fittings that can't be bought easily on eve...
by BigBlockMopar
Sun Apr 12, 2020 5:58 pm
Forum: Messages
Topic: Image Size Revision
Replies: 2
Views: 944

Re: Image Size Revision

Make it so that no-one has to worry about pictures being rejected due to being oversized. This is such a "year 2000" thing.
Install extensions that resize 'any' uploaded image down to your desired 800 or 1024 pixels wide dimension before it's posted into a post.
by BigBlockMopar
Sun Apr 12, 2020 5:55 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

Opened up the 425, didn't find any burrs or anything. Still looked like almost new. Cleaned everything up inside. I remembered I had once altered the top of the carb to try and lean out the mixture slighty at idle by machining down the springseat slighty. This worked nicely at the time I had the mix...
by BigBlockMopar
Sat Mar 28, 2020 8:33 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

Electric. Vacuum lockoffs aren't at all common over here. The internal diameter of the current lockoff is 5-6mm. The old one I removed from the car had barely a 2.5mm orifice. EDIT: Yes, regardless of RPM. The 425 carb is mounted vertically. I've manually checked the movement of the large valve but ...
by BigBlockMopar
Sat Mar 28, 2020 7:59 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

How lean is very lean? Are you running gas scale AFR, propane scale AFR or Lamda? The gauge goes off the scale to lean. At least for sure leaner than 18-19s. If I 'feather' the throttle across 3/4 to full, I can see AFR's going from 11-12s to quickly fluctuating leaner and go full lean right after....
by BigBlockMopar
Sat Mar 28, 2020 2:15 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

The high pressure lines are all copper-tubing. Both tanks are connected together in the trunk. I've fueled up the car yesterday and I'm noticing (as always), the car has some more power. But still everytime I depress the throttle-pedal fully, the AFR goes very lean after about a second orso. Everyth...
by BigBlockMopar
Fri Mar 27, 2020 7:28 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

Thanks for the tips. I recall I already have replaced the foamfilter earlier when I had the vaporiser open at one time. The old one was caked and brittle and broke when touched. I'll see if I can install a pressure gauge and route it near the windscreen to view it. Maybe if I can find a suitable pre...
by BigBlockMopar
Fri Mar 27, 2020 7:07 am
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Re: Lean out at WOT. Fine at 3/4 throttle

The AFRs on the dyno-run started to go lean at around 3750rpm. Currently I see AFRs going lean (way lean) a far below those rpms now. Since this is just a 360ci engine I still think something is still blocking/limiting the fuel flow somewhere. I might have to dig into the vaporizer and have a look a...
by BigBlockMopar
Wed Mar 25, 2020 8:22 pm
Forum: Propane Forum
Topic: Lean out at WOT. Fine at 3/4 throttle
Replies: 18
Views: 1455

Lean out at WOT. Fine at 3/4 throttle

Started noticing for a while now my engine leans out at somewhere above 3/4 throttle. Pretty much irregardless of engine rpm or acceleration force. The car keeps accelerating during the lean-out situation but the AFR-gauge is pegged lean. Letting off the throttle it feels as if the engine gets/produ...
by BigBlockMopar
Tue Jan 28, 2020 5:18 pm
Forum: Messages
Topic: Forum Logo
Replies: 20
Views: 11565

Re: Forum Logo

I didn't note or pay attention to proportions. Just closely remade the logo from the Photoshop-file I had.
by BigBlockMopar
Mon Jan 27, 2020 5:58 pm
Forum: Messages
Topic: Forum Logo
Replies: 20
Views: 11565

Re: Forum Logo

You can edit which file(type) to show in the header by editing the appropiate template file. But these days you can even install a forum-extension that handles this more easier. You can't "just" convert a bitmap-file to a vector SVG-file normally. Since I made the logo in Photoshop originally, I jus...
by BigBlockMopar
Mon Jan 13, 2020 7:19 am
Forum: Propane Forum
Topic: Status on High Performance 4-barrel Carbs
Replies: 13
Views: 3506

Re: Status on High Performance 4-barrel Carbs

(I think you might want to edit a worfd in your post somewhere near the last couple of lines ;) ) Here in the Netherlands, LPG is only interesting to use on American cars when the car is used often. AND, only because 1 liter of (compressed) LPG is about 1€ cheaper than 1 Liter of gasoline. On an occ...
by BigBlockMopar
Wed Nov 13, 2019 1:13 pm
Forum: Propane Forum
Topic: Starting problem with Model 425 Mixer on a 1995 Chevy S10
Replies: 5
Views: 3312

Re: Starting problem with Model 425 Mixer on a 1995 Chevy S10

I would also try at looking at the engine's cranking speed. A tired battery and/or worn starter might turn over the engine quite slowly. I'm a believer in a new/fresh GEL-technology battery and a higher speed mini-starter. The propane hose from vaporizer to 425 is about 80cm long but my car always s...
by BigBlockMopar
Wed Sep 25, 2019 4:17 pm
Forum: Propane Forum
Topic: Help to identify the parts in this picture.
Replies: 12
Views: 3805

Re: Help to identify the parts in this picture.

Checked out the filter inside and it looks like the passages don't narrow down in size, although it appeared that way at first glance too and still does appear so in the pics. https://www.bigblockmopar.nl/wp-content/uploads/2019/09/IMG_9692.jpg https://www.bigblockmopar.nl/wp-content/uploads/2019/09...
by BigBlockMopar
Sat Sep 21, 2019 4:34 am
Forum: Propane Forum
Topic: Help to identify the parts in this picture.
Replies: 12
Views: 3805

Re: Help to identify the parts in this picture.

Couldn't find anything online, but I would *suspect* it should be 1/4" all the way... but the image gives the suggestion that it necks down a size.
If I don't forget when I get to my garage I'll open up a filter and do some measuring.