Electric warming of vaporizer/convertor?

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BigBlockMopar
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Electric warming of vaporizer/convertor?

Post by BigBlockMopar » Sun Dec 04, 2016 5:34 am

Are there any kits or models that warm up a convertor electrically, instead of with engine-coolant?
Although I can imagine the power draw of an electric heater inside the convertor would be high and put a strain on the electric system of a car.
https://www.bigblockmopar.com
'73 Dodge Dart - 360ci - 11.3:1cr
MegaSquirt + HEI 7-pin timing control - Edelbrock AirGap - Cold Air Intake
IMPCO E / 425 mixer - A518 OD-trans - 3.55 gears - 225/50/17" tires.

fpvmustang
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Re: Electric warming of vaporizer/convertor?

Post by fpvmustang » Tue Dec 06, 2016 3:51 pm

I know on the old tractors they had a vapor valve for warm up.
A friends harvester will ice if he drives it before he shows some water temp. He doesn't have the vapor valve for warm up.

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Re: Electric warming of vaporizer/convertor?

Post by Frank » Wed Dec 07, 2016 11:37 am

Presumably, the need for an electric heater is a cold weather issue. Have you considered adding a block or circulation heater to your cooling system? It is very common to see cars "plugged in" overnight here in Canada.

kuchen
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Re: Electric warming of vaporizer/convertor?

Post by kuchen » Wed Dec 07, 2016 2:35 pm

I did the calculations once and came up with something like 1.1kW of heat required for the LPG supply of a Citroen 2CV at rated power of 20kW - Only for the evaporation, let alone the superheat and ambient losses. Used exhaust heat instead, see viewtopic.php?f=5&t=1667#p12532
There is a kit that provides approx. 0.7kW electrically for dedicated setups to assist the cold start, but still hot water required once you draw real power:
http://www.ac.com.pl/products-autogas/r ... 01-cs/339/
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kikkegek
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Re: Electric warming of vaporizer/convertor?

Post by kikkegek » Mon Mar 20, 2017 8:16 am

an australian friend of mine has build e pre heater using diesel glow plugs......would that be a good idea?
daily: 1974 GMC 25HUNDRED Suburban - fresh rebuild 350 small block - TH350-NP203 - 4.1 end gears - IMPCO425 mixer - IMPCO model E vaporizer
project: 1977 GMC C15 Suburban - 454 big block - TH400 - gasoline
sold: 1986 Chevrolet Suburban K20 Silverado

kuchen
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Re: Electric warming of vaporizer/convertor?

Post by kuchen » Mon Mar 20, 2017 2:15 pm

well, take a closer look. The AC CS is exactly that.
Can't change the laws of thermodynamics and the limits of 12V automotive electrical systems.

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kikkegek
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Re: Electric warming of vaporizer/convertor?

Post by kikkegek » Mon May 22, 2017 8:45 am

kuchen wrote:well, take a closer look. The AC CS is exactly that.
Can't change the laws of thermodynamics and the limits of 12V automotive electrical systems.
problem is that its only 250hp and I have a 7.4L V8 engine....250hp would be awesome for now, but I hope to make a little more in future

and its rather expensive reducer compared to a KMG Gold even the Turbo version.
daily: 1974 GMC 25HUNDRED Suburban - fresh rebuild 350 small block - TH350-NP203 - 4.1 end gears - IMPCO425 mixer - IMPCO model E vaporizer
project: 1977 GMC C15 Suburban - 454 big block - TH400 - gasoline
sold: 1986 Chevrolet Suburban K20 Silverado

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kikkegek
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Re: Electric warming of vaporizer/convertor?

Post by kikkegek » Mon May 22, 2017 8:50 am

a simple system of simple parts would make a good solution "I think".

- one or two glowplugs from a diesel engine?
- piece of pipe to install the glowplugs in
- simple adjustable thermostat set to 30 or 40C to turn off the glow plugs
daily: 1974 GMC 25HUNDRED Suburban - fresh rebuild 350 small block - TH350-NP203 - 4.1 end gears - IMPCO425 mixer - IMPCO model E vaporizer
project: 1977 GMC C15 Suburban - 454 big block - TH400 - gasoline
sold: 1986 Chevrolet Suburban K20 Silverado

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kikkegek
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Re: Electric warming of vaporizer/convertor?

Post by kikkegek » Mon May 22, 2017 10:30 am

found these on a Ecomodder forum

Image


Image
daily: 1974 GMC 25HUNDRED Suburban - fresh rebuild 350 small block - TH350-NP203 - 4.1 end gears - IMPCO425 mixer - IMPCO model E vaporizer
project: 1977 GMC C15 Suburban - 454 big block - TH400 - gasoline
sold: 1986 Chevrolet Suburban K20 Silverado

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kikkegek
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Re: Electric warming of vaporizer/convertor?

Post by kikkegek » Sat Aug 11, 2018 2:37 am

BBM, did you ever research this any further?

I am currently driving only LPG on my suburban, took the gasoline tank out. So really would love to stay single fuel.

Maybe I'll keep the IMPCO 300 mixer for now, so I can start in cold weather conditions and switch to injection when its warm enough. but I dont like how the 300 mixer looks on the engine ;-)
daily: 1974 GMC 25HUNDRED Suburban - fresh rebuild 350 small block - TH350-NP203 - 4.1 end gears - IMPCO425 mixer - IMPCO model E vaporizer
project: 1977 GMC C15 Suburban - 454 big block - TH400 - gasoline
sold: 1986 Chevrolet Suburban K20 Silverado

BigBlockMopar
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Re: Electric warming of vaporizer/convertor?

Post by BigBlockMopar » Sat Aug 11, 2018 6:50 am

No, but I'll look into it again when the need arises when I start using vapour injection.
My plan for now, is to also keep the ol' trusty Impco vaporizer in the loop as primary, cold start fuel source, and once engine/coolant temp is at a certain level, then automaticly switch over to vapour injection.

Although I haven't thought out yet what the issues would be with wasted spark and a modern engine like the 5.7/6.1L Hemi.
I don't see much issues with my current 360ci engine I think.
https://www.bigblockmopar.com
'73 Dodge Dart - 360ci - 11.3:1cr
MegaSquirt + HEI 7-pin timing control - Edelbrock AirGap - Cold Air Intake
IMPCO E / 425 mixer - A518 OD-trans - 3.55 gears - 225/50/17" tires.

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kikkegek
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Re: Electric warming of vaporizer/convertor?

Post by kikkegek » Sat Aug 11, 2018 7:07 am

BigBlockMopar wrote:
Sat Aug 11, 2018 6:50 am
No, but I'll look into it again when the need arises when I start using vapour injection.
My plan for now, is to also keep the ol' trusty Impco vaporizer in the loop as primary, cold start fuel source, and once engine/coolant temp is at a certain level, then automaticly switch over to vapour injection.

Although I haven't thought out yet what the issues would be with wasted spark and a modern engine like the 5.7/6.1L Hemi.
I don't see much issues with my current 360ci engine I think.
I think switch should be manually, because you need to open up the "air valve" under the IMPCO 300 mixer to make sure that all air isnt going through the mixer anymore, which will be a restriction when switched over to injection. And still that only adds a small opening, thus not really optimal for good air flow.

I like keep the 300 mixer for warming up, but dont like how I need to switch over and will be a restriction for air flow during injecton.

using the two injectors in my TBI will be better for air aiflow and let me use normal air filters, but I would need to keep a gasoline system operational. Where I'd prefer to go single fuel.

I am currently monitoring how fast my Big Block warms up the coolant. if its quick, then maybe I'll just go for a simple coolant preheater from diesel engine like I posted before connected to a simple thermostat that turns it off once the engine coolant goes over 30 or 35C.
daily: 1974 GMC 25HUNDRED Suburban - fresh rebuild 350 small block - TH350-NP203 - 4.1 end gears - IMPCO425 mixer - IMPCO model E vaporizer
project: 1977 GMC C15 Suburban - 454 big block - TH400 - gasoline
sold: 1986 Chevrolet Suburban K20 Silverado

BigBlockMopar
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Re: Electric warming of vaporizer/convertor?

Post by BigBlockMopar » Sat Aug 11, 2018 7:20 am

I have not been using a 'silly' ;) IMPCO 300 for a long time anymore because my setup runs on LPG only (425 carb), but even that air-valve could be 'automated' with a solenoid and a MegaSquirt ECU I would think.
https://www.bigblockmopar.com
'73 Dodge Dart - 360ci - 11.3:1cr
MegaSquirt + HEI 7-pin timing control - Edelbrock AirGap - Cold Air Intake
IMPCO E / 425 mixer - A518 OD-trans - 3.55 gears - 225/50/17" tires.

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