Search found 372 matches

by BigBlockMopar
Fri Apr 19, 2019 6:11 pm
Forum: Propane Forum
Topic: Circuit Trackday with the '73 Dart
Replies: 2
Views: 27

Re: Circuit Trackday with the '73 Dart

I have a little better write-up on my site in the signature, but here's a short clip from trackside where someone happened to shoot some vid of my car in ahum "action"... https://www.youtube.com/watch?time_continue=690&v=_pvFTPwUlEI I've also shot some in-car video myself with a cool iPhone app call...
by BigBlockMopar
Fri Apr 19, 2019 3:11 pm
Forum: Propane Forum
Topic: Circuit Trackday with the '73 Dart
Replies: 2
Views: 27

Circuit Trackday with the '73 Dart

Last sunday I was able to put my Dart on the Circuittrack for a 20 minute blast around the 4.2km racetrack. This was my first time on a track and I wanted to get some feel of how the car performs at (some) higher speeds. Being my first time, one has to learn to 'read' the corners and how fast you ca...
by BigBlockMopar
Tue Apr 09, 2019 5:30 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 39
Views: 1047

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

I replaced the Innovate MTX-L AFR gauge & controller with an entirely different one (albeit based on same Innovate basics) and the problem dissapeared. The new (MSD) gauge/controller provides a more steady and stable (and expected) readings of the AFR-ranges during acceleration/cruise and decelerati...
by BigBlockMopar
Sun Mar 24, 2019 6:15 am
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 39
Views: 1047

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

Findings: No more hesistations during firm/hard acceleration with the tank getting close to empty. Other things I found recently: The engine seems to go very rich during hard acceleration(9-10 AFR), and runs very lean during cruise (17-19). I can't be sure if already was the case before, because the...
by BigBlockMopar
Sun Mar 17, 2019 7:48 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 39
Views: 1047

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

Finally was able to rotate the 'lower' ringtank 180° in the car. Didn't change anything else at the moment. I will drive the tanks to empty during the week and report if the lack of power during accelerations is still present. The tank(s) were just filled up when I started this morning, which let me...
by BigBlockMopar
Sun Mar 17, 2019 3:48 pm
Forum: Propane Forum
Topic: Vaporizer temperature, contaminants, and separate thermostats
Replies: 6
Views: 153

Re: Vaporizer temperature, contaminants, and separate thermostats

Recently I've been looking into digitally manage the vaporiser (outlet) temp and use a modern heater valve for this purpose. With the Megasquirt ECU in my car, I can install a temp-sensor in the vapourhose and control a heater valve with that to maintain a steady temp(range). My goal is to be able t...
by BigBlockMopar
Sat Feb 02, 2019 5:11 am
Forum: Propane Forum
Topic: Vaporizer temperature, contaminants, and separate thermostats
Replies: 6
Views: 153

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: 39
Views: 1047

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: 39
Views: 1047

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: 39
Views: 1047

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: 39
Views: 1047

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: 39
Views: 1047

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: 39
Views: 1047

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: 39
Views: 1047

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: 39
Views: 1047

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.