Search found 362 matches

by jono
Tue Jul 23, 2019 8:58 am
Forum: Propane Forum
Topic: Impco accel Hesitation, poor idle when warm VY Commodore
Replies: 9
Views: 433

Re: Impco accel Hesitation, poor idle when warm VY Commodore

It sounds like the hesitation on take off is a lean fuel mixture. A tailpipe analyser can work that out. Maybe if you can get an O2 reader off front most oxygen sensor might also tell a story
by jono
Tue Jul 09, 2019 9:49 am
Forum: Propane Forum
Topic: Impco accel Hesitation, poor idle when warm VY Commodore
Replies: 9
Views: 433

Re: Impco accel Hesitation, poor idle when warm VY Commodore

For diagnostic purposes I would try a clean air diaphragm and temporarily disable the FCV stuff. This stuff forces the mixer to work in reverse to the way it was meant to. I am tinkering with a unit by Peel that allows mixer to work as it should but more on it later when I have sorted it's demons. C...
by jono
Wed Jul 03, 2019 7:40 pm
Forum: Propane Forum
Topic: Fuel level gauge at drivers end
Replies: 4
Views: 224

Fuel level gauge at drivers end

I am curious what people have as fuel level indicators up front. My first conversion 30 years ago used a box of tricks to convert Ohms from tank contents gauge on the tank, into a range to suit the fuel gauge already in the classic old Ford's dash. It worked well at each end of the ranges Other conv...
by jono
Sat May 18, 2019 11:24 pm
Forum: Propane Forum
Topic: flashback for some ..
Replies: 0
Views: 388

flashback for some ..

I jumped on the offer of this old converter just for the Impco name in script.
It is only something I had seen in old brochures . Date sticker was 000987 so they dropped the script style somewhere between Sept 87 and July 90 when I ordered my first components
by jono
Sun Apr 28, 2019 8:35 am
Forum: Propane Forum
Topic: Valid email for GasResearch in Australia
Replies: 7
Views: 282

Re: Valid email for GasResearch in Australia

I hope you find them still in business as many suppliers have closed their doors here in Australia or no longer trade in log gear.Talking to a former Elko supplier only yesterday chasing an injection converters filter service kit. Sorry. And he also explained why so much pipe sealant all over things...
by jono
Mon Apr 08, 2019 6:21 pm
Forum: Propane Forum
Topic: Adding an elec. fuelpump to an Impco vaporizer+425 setup
Replies: 39
Views: 1968

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

at full throttle you may be upsetting the vacuum needs of the Impco gear for it to work nicely. It is a bit like my turbo boxer 1800 cc _ everything is better in power delivery if I sort of ride the wave of power with a lighter throttle rather than foot to the floor. I do like that the suggestion of...
by jono
Sun Apr 07, 2019 8:59 am
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 473

Re: Additional mixture base leaning

well C3, that may be the case on the 2 hundred series having a lean idle with their usual applications, but I am finding most knowledge and interest especially in the US is with larger capacity fours, sixes and eights. I recall when I did my first turbo 1800 cc every Impco specialist and Impco thems...
by jono
Wed Mar 20, 2019 8:57 pm
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 473

Re: Additional mixture base leaning

and thinking this through a little more before I go swapping my spare old body in to muck about drilling holes ...considering the idle air mixture adjust screw is about 8mm dia and buts up to close a slightly smaller hole inside I could likely make a hole as large as 6mm and use the screw in circuit...
by jono
Fri Mar 15, 2019 7:42 pm
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 473

Re: Additional mixture base leaning

Thanks for comment

Mind you the hole I propose is essentially between the same two chambers that the idle air mixture screw is between so I am hoping there will not be those issues you mentioned as it will all before the throttle body
by jono
Mon Mar 04, 2019 4:10 pm
Forum: Propane Forum
Topic: Air line oiler as simple valve lubricator
Replies: 17
Views: 642

Re: Air line oiler as simple valve lubricator

interesting approach but the pcv probably does not deliver consistently in some cases. I installed a cheap version of UCL to the Impco throttle body on my 250 ci inline six. Within ten miles I had to reduce the idle speed by a few hundred rpm , an anomaly I can only suggest caused by freeing up the...
by jono
Tue Feb 26, 2019 5:23 pm
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 473

Re: Additional mixture base leaning

Sorry, I should have said I have already got the maximum of three leaning rings in. I need to get a crude lean base rather than the finer tune the rings give. Another method suggested is balance tube but with small bleed holes drilled in the converter end brass fitting to act as a damper to the lean...
by jono
Sat Feb 23, 2019 8:29 pm
Forum: Propane Forum
Topic: Modern setup vs. ancient factory propane specs on tractor
Replies: 16
Views: 844

Re: Modern setup vs. ancient factory propane specs on tractor

Your idle speed may be depending on how much air slips past throttle butterfly when in no load situation I once used an Impco throttle plate body that is a stretched out circular shape like a round dining table that has rectangular extensions in the middle section - so it was a replacement for a sin...
by jono
Sat Feb 23, 2019 8:10 pm
Forum: Propane Forum
Topic: Modern setup vs. ancient factory propane specs on tractor
Replies: 16
Views: 844

Re: Modern setup vs. ancient factory propane specs on tractor

it is some while since I looked into the forum - has been so quiet. Am only using a 7" tablet hot wired to my cell phone so have not read the contributions fully I have taken in some figures such as engine size is 4.2 litre but lost the comp ratio. What are idle, working and max rev specs of this p...
by jono
Sat Feb 23, 2019 7:44 pm
Forum: Propane Forum
Topic: Additional mixture base leaning
Replies: 7
Views: 473

Additional mixture base leaning

Having found I cannot lean my 200 mixer out enough using the idle mixture screw - and hand flowed leaner diaphragm selection has become difficult, I am considering trying a permanent hole drilled into the inner housing to lean mixtures further. This is only to get a lean base in prep for dialling in...
by jono
Sat Feb 23, 2019 7:24 pm
Forum: Propane Forum
Topic: air valve flow ratings hand printed
Replies: 3
Views: 625

Re: air valve flow ratings hand printed

Aha, OK Franz. Thankyou. It is good to see you are still fronting to this quiet little forum from time to time I took a break on this little project when the main supplier near me had a staff member state he was not going to go through all his stock to find my desired number - can you believe it? Hi...