Search found 366 matches

by BigBlockMopar
Sat Feb 02, 2019 5:11 am
Forum: Propane Forum
Topic: Vaporizer temperature, contaminants, and separate thermostats
Replies: 5
Views: 69

Re: Vaporizer temperature, contaminants, and separate thermostats

I think they indeed do mean to say the 'heavy' oil will seperate from the vapour. This thermostat would be nice for a low performance setup where there is 'enough' time to compensate for changes in engine-load and fuel demand. I'm not so sure the thermostat will/can change quick enough to compensate...
by BigBlockMopar
Sun Jan 13, 2019 5:57 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

I doubt I will be able to do all at once.
Winter has been very mild upto now overhere but it's bound to get colder next week, which means less garage time for me.
by BigBlockMopar
Sat Jan 12, 2019 4:39 am
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

I have a large, roughly 4", tube out of a clothes-dryes laying somewhere which I would like to use instead of the thin aluminium ducting. Or if I stumble across something factory/readymade from a later car, I could use that, but I'm not actively looking at the moment. With the tanks full, the engine...
by BigBlockMopar
Thu Jan 10, 2019 3:14 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

Storm, The throttle fully opening was the first thing I checked before doing the dyno-runs. I always try to learn from other's mistakes I happen to come across :) Here's a pic of the throttle plate. Don't know the bore diameters but I have a spare one to measure on. https://www.bigblockmopar.nl/wp-c...
by BigBlockMopar
Wed Jan 09, 2019 3:33 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

The housing is a stock late '70s unit from a Chrysler with 400ci 4-bbl engine. Attached to the housing is large diameter tubing routed to the front of the car through the radiator-support. But, we tried with and without airfilter housing, made no difference at the time. Baseplate is a stock-type Hol...
by BigBlockMopar
Mon Jan 07, 2019 3:13 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

Regulator is an E.
I have datalogs from most of the dynoruns.
kPa was ranging from 93 to 83 kPa during the dynorun (1.5" to 4.5" vacuum).
by BigBlockMopar
Sat Jan 05, 2019 5:59 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

The AFR curve shown is based on Gasoline AFRs. In this case I would rather have seen the actual Lambda-value, which can be converted to the proper value afterwards. Installation of an 8mm line is in the works, as well as a new 8mm lockoff and IMPCO filter/'storage pot'. I have no real doubts about t...
by BigBlockMopar
Sat Jan 05, 2019 6:27 am
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

The 360ci put out a max 234hp on the wheel-dyno last year.
Here's the chart (I notice the AFR' are leaning out even before 4K rpm.)

Image
by BigBlockMopar
Fri Jan 04, 2019 7:20 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

The restrictor-plate has been removed in the 425. This was one of the first things I did.
by BigBlockMopar
Fri Jan 04, 2019 3:20 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

I agree with that.
I did however notice the mixture getting leaner above 4200 on the dyno, which basicly says the propane starts to drop back while the airflow is still available.
If the 425 was already the bottleneck, power in general would just drop off instead of a change in mixture.
by BigBlockMopar
Thu Jan 03, 2019 4:36 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

6mm is the "default" diameter used here for years in the Netherlands on older car propane-installations. 'Performance' engine usually get an upgrade to 8mm but I haven't heard or seen any 10mm installations (which would be kind of overkill imo as you can imagine how much liquid compressed propane ca...
by BigBlockMopar
Wed Jan 02, 2019 3:55 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

I will mostly likely turn the tank around. As for the larger diameter fuelline, there will also be more liquid (weight) in position that could be affected by acceleration, which could be pushed back a bit again against the rear check valves in the T-connector. But the additional 'storage' inside the...
by BigBlockMopar
Wed Jan 02, 2019 3:14 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

We indeed have a mix here of Propane and Butane. I don't know if or when a change is made between winter/summer blends. I've never seen it posted and will probably need to dig a bit for that kind of information. Rotating the tank 180° will position the pickup to the rear of the car. This will most l...
by BigBlockMopar
Tue Jan 01, 2019 3:21 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

I would *think* even with vapour being pumped, the remaining liquid in the line would still be pushed forward by this and solve the issue. The mainline is 6mm. Tanks are positioned having 1 cylindrical tank under the package tray, and the other, a donut-shaped tank, laying flat in the spare-tire whe...
by BigBlockMopar
Tue Jan 01, 2019 6:51 am
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 32
Views: 708

Re: Adding an elec. fuelpump to an Impco vaporizer+425 setup

I thought too lightly about it and agree the already existing pressure in the system would demand different specs to a pump. An in-tank pump would have it 'easier' because of the relative pressure it will operate in (and that it's already designed to deliver a high pressure), but I doubt there are r...