UPDATE 2 Adjusting timing propane engine and impco 425 mixers

Propane, Butane, LPG, GPL, C3H8, C4H10
storm
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Re: Adjusting timing propane engine and impco 425 mixers

Post by storm » Fri Dec 07, 2018 4:18 pm

Caddy123 wrote:
Fri Dec 07, 2018 3:43 pm
Ok last question.
1 mixer doos not respond on the idle screw (2000 miles on it) only if i screw it in far.
Ps mixer 2 is new! Respond perfect.
Or do i have a vaccuum leak?
2 things come to mind
1. Idle diaphragm may be faulty (hole in it?)
2. Do you have a separate regulator/converter for each mixer? If yes swap them over and see if the difficult idle setting changes to the other mixer.
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Caddy123
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Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Fri Dec 07, 2018 5:43 pm

Test
Last edited by Caddy123 on Fri Dec 07, 2018 6:11 pm, edited 1 time in total.

Caddy123
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Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Fri Dec 07, 2018 6:05 pm

:roll:

storm
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Re: Adjusting timing propane engine and impco 425 mixers

Post by storm » Fri Dec 07, 2018 6:23 pm

There is a size (how many Megabytes) limit on attachments. If your test didn't work it may be because you are trying to attach a file that is to large.
I just did a test and 2MB seems to be the limit, anything over that and it won't even try.
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Fuel flow requirements calculations viewtopic.php?f=5&t=1638

Caddy123
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Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Sat Dec 08, 2018 2:03 am

IMG-20181208-WA0009.jpg
IMG-20181208-WA0012.jpg
IMG-20181208-WA0012.jpg
Attachments
IMG-20181208-WA0010.jpg

storm
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Re: Adjusting timing propane engine and impco 425 mixers

Post by storm » Sat Dec 08, 2018 2:59 am

Nice plenum. You have 2 Impco E regulators, from my understanding they are better off being mounted with the vapour hose at the bottom.
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Fuel flow requirements calculations viewtopic.php?f=5&t=1638

Caddy123
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Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Sat Dec 08, 2018 5:23 am

Jes there impco E regulators.
I know there upside down.
This was better for the vapor hose.
I drive 3000 miles a year in the summer.
I can reach them easy so i can clean and check them on the( i think) 10000 miles.
Screw the top of and go😎
So the rest of the evaporator can stay on plase

storm
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Re: Adjusting timing propane engine and impco 425 mixers

Post by storm » Sat Dec 08, 2018 1:16 pm

Have you swapped the regulators (or mixers) around to see if the idle tuning problem switches to the other mixer?
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

Fuel flow requirements calculations viewtopic.php?f=5&t=1638

Caddy123
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Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Sat Dec 08, 2018 2:32 pm

No i have a little vaccuum problem.
The mixer that not respond have a gasket leak.
My mate have welded the plenium but i have not check for straightness so i must take it appart and milling it.
Next week.
If its ready you hear.

Caddy123
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Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Tue Dec 11, 2018 9:19 am

Is this a good afr reader for my set up (i like the$)
From edelbrock only it measures with 0.5 v and not 0.1v.
there expencive.
https://www.amazon.com/Edelbrock-6593-F ... B00062YBES

storm
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Re: Adjusting timing propane engine and impco 425 mixers

Post by storm » Tue Dec 11, 2018 10:21 am

Personally I'd say no, try one of these instead https://www.innovatemotorsports.com/xca ... hp?cat=261
Every job is a self-portrait of the person who did it. Autograph your work with excellence.

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Steptoe
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Re: Adjusting timing propane engine and impco 425 mixers

Post by Steptoe » Tue Dec 11, 2018 2:09 pm

I use an inovate, older model.

The vapour hose go to the bottoms as LPG is not clean.. has oils/wax and such in it.
With hose at the bottom, these flow thru and drop out.. at the top or side collect very quickly inbehind the diapham.
My Spelling is Not Incorrect...It's 'Creative'

Caddy123
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Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Wed Dec 12, 2018 1:20 am

Thanks for the input.
I turn the regulators and buy a good afr.
Gr Danny

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Steptoe
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Re: Adjusting timing propane engine and impco 425 mixers

Post by Steptoe » Wed Dec 12, 2018 1:41 am

If it just points downwards.. does not need top be actually pointed down all the way.
Just enough , so the wax cant accumulate.
I put near on 200,000 miles near vertical and had a little build up in the cnr at the bottom.. not enough to effect anything.
If built up, clean out with kerosene and a paint brush.. if bad may need a bit of a soak.
My Spelling is Not Incorrect...It's 'Creative'

Caddy123
Posts: 30
Joined: Sat Dec 01, 2018 2:41 pm
Location: Netherlands

Re: Adjusting timing propane engine and impco 425 mixers

Post by Caddy123 » Wed Dec 12, 2018 2:13 pm

Ok thanks steptoe i check them 👌

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