Search found 133 matches

by bumpstart
Tue Feb 18, 2014 9:50 pm
Forum: Your Project
Topic: Propane conversion on Dragons' Breath Mazda 13b engine
Replies: 80
Views: 70050

Re: Propane conversion on Dragons' Breath Mazda 13b engine

of the two ports on the TB ( holley baseplate ) , one is vacuum.,. other is port air ( vac advance ) you test which is which by blowing down them and operating the throttle ( the vacuum one is under the throttle plate and will be more audible open ,, the port air will have no flow ( or blow just abo...
by bumpstart
Sun Feb 16, 2014 9:53 pm
Forum: Your Project
Topic: Propane conversion on Dragons' Breath Mazda 13b engine
Replies: 80
Views: 70050

Re: Propane conversion on Dragons' Breath Mazda 13b engine

if your stuck i can buy one here for you and slip it in the mail on the 200 ( if like the 225 ) there should be several blind screws on the corner edges of the mixer body that can be removed and replaced with the 1/8 nipples to provide vac points for the SV, and for power valve and or for the feedba...
by bumpstart
Sun Feb 16, 2014 9:38 pm
Forum: Propane Forum
Topic: Price of propane
Replies: 10
Views: 7107

Re: Price of propane

the surge is seasonal though this year it is worse than others , currently about 95.5 aus cents per litre whilst 91 RON unleaded is $1.44- $1.48 per litre usually in our winter ( hot season in northern hemisphere ) the price slips back to be around half that of the 91 unleaded as such the normalised...
by bumpstart
Mon Dec 30, 2013 9:12 am
Forum: Your Project
Topic: Propane conversion on Dragons' Breath Mazda 13b engine
Replies: 80
Views: 70050

Re: Propane conversion on Dragons' Breath Mazda 13b engine

i think the point is that the electric lockoff valve itself ,, normally mounted to the inlet of the model E reg,, can instead be put at the tank end,, cause your liquid line is very short in other installs on cars and trucks then the line length means much more fuel in it , so has the excess flow lo...
by bumpstart
Sun Dec 15, 2013 2:44 am
Forum: Propane Forum
Topic: Propane on a motorcycle
Replies: 20
Views: 11882

Re: Propane on a motorcycle

thats a good point ,, i think maybe it has star washers,, but myself doubt they are worth gambling on,, and must be bad for airflow a combination of thread sealant and star washer might be Ok,, it is a bit subjective from here through maybe you can replace and countersink and wire pin the excess thr...
by bumpstart
Sun Dec 15, 2013 2:31 am
Forum: Your Project
Topic: Propane conversion on Dragons' Breath Mazda 13b engine
Replies: 80
Views: 70050

Re: Propane conversion on Dragons' Breath Mazda 13b engine

looks very good,, wish i could find those shipping prices ! .. the start assist solenoid is a bonus and will certainly help both in the cold,, and in the method we use when setting up the tune usually ( on a simple setup ) you would run fused power via a thumb switch through the solenoid to earth to...
by bumpstart
Wed Dec 11, 2013 2:19 am
Forum: Your Project
Topic: Propane conversion on Dragons' Breath Mazda 13b engine
Replies: 80
Views: 70050

Re: Propane conversion on Dragons' Breath Mazda 13b engine

PS,, safety first,, please do the initial pressure ups not in an enclosed space
( i know its cold where you are but its not a clever idea to do leak tests under the house )

keep us up to date with whats going on and we can lead you through the plumbing and the safety interlock wire-ups
by bumpstart
Wed Dec 11, 2013 2:14 am
Forum: Your Project
Topic: Propane conversion on Dragons' Breath Mazda 13b engine
Replies: 80
Views: 70050

Re: Propane conversion on Dragons' Breath Mazda 13b engine

wow.. dont think there is that much detail on the bike even on the mazda forum good to see you found someone good,, very local ,.,as for the knockoff impco stuff,, some of it is OK .. one brand called L.P gas make a version of 225 that has a changes that make it inherently stronger under boost and h...
by bumpstart
Fri Dec 06, 2013 9:52 am
Forum: Propane Forum
Topic: impco 200 super lean!! help
Replies: 22
Views: 14964

Re: impco 200 super lean!! help

thinks im a little late on this one .. first,, thumbs up for the manometer pic,, takes me back to when i had to tune a fuel injected ducati and had to balance the TB's.. made an impromtu setup with a board , loop, and an icecream container lid with a hole in it i think i still have it in the shed so...
by bumpstart
Tue Nov 26, 2013 7:39 am
Forum: Propane Forum
Topic: Propane on a motorcycle
Replies: 20
Views: 11882

Re: Propane on a motorcycle

be aware some small motor and scooter tanks may be configured for vapour uptake,, and are not suitable unless the fittings can be exchanged for auto capacity liquid pickups ( and filler and lockoffs ) and are designed mostly to fit in a helmet carry case im thinking this tank wants to mount in the s...
by bumpstart
Sat Nov 16, 2013 10:58 pm
Forum: Your Car
Topic: DRAGON"S BREATH!!
Replies: 2
Views: 7077

Re: DRAGON"S BREATH!!

welcome! .. ive pointed gerald here as this is the place to ask the curly questions the choice to look hard at LPG is simple.. this bikes mechanical systems have been built with high simplicity in mind so as to achieve a high level of reliability in a dusty and vibrational environment the fuel itsel...
by bumpstart
Fri Oct 18, 2013 10:56 pm
Forum: Propane Forum
Topic: What Size Impco Carb?
Replies: 11
Views: 10886

Re: What Size Impco Carb?

yes keep your TB if it simplifies the install... the 200 and 225 do not come with throttle assembly you add them to stock TB or use the impco throttle body,, also 200 and 225 can be supplied as "FB" designation .. to be used with the CDP-02 controller ( which uses a deliberately over rich gas/air va...
by bumpstart
Thu Oct 17, 2013 9:41 am
Forum: Propane Forum
Topic: What Size Impco Carb?
Replies: 11
Views: 10886

Re: What Size Impco Carb?

hello.. using impco 225 and model E ( and supplementary model L ) on a 13B turbo rotary.. not on a 6.. hybrid t04 turbo.. wheel HP is up there around 300 at 15 psi the airflow demands between a 4-5l engine and a ( 86-91 ) 13bt are not all that different even the stock ( suck through ) 13bt airflow m...
by bumpstart
Mon Oct 14, 2013 2:22 am
Forum: Propane Forum
Topic: What Size Impco Carb?
Replies: 11
Views: 10886

Re: What Size Impco Carb?

200 or 225 , pending the required dimensions of the package fit up 200 being right angle entry and 225 being centre hat both essentially using same internal parts a 225 suits an EFI duct location easier and flows slightly more NA and is used commonly for engines 3.3 to 5 L whilst the 200 is maybe a ...
by bumpstart
Sat Sep 21, 2013 8:14 am
Forum: Propane Forum
Topic: Impco enrichment start valve
Replies: 4
Views: 4034

Re: Impco enrichment start valve

oops, slight correction.. i have the power source for my 'power valve ' solenoid parallel off the existing HP lockoff solenoid which has the safety time out feature when it sees a lack of ignition pulse as such i let it time out twice ( which allows the wideband controller time to do its self cal ) ...