..........Tuning the mm x450.........new ? post 59

[flatblack]

I was told before with the mm it should have the extra power valve but ive read different...i didnt know what way to go with that....would that be a good investment..?...my engine doesnt have alot of vac because of the cam lobe and duration profile, has alot of overlap.
The other the start assist valve seems like it would help too...actually alot since of the long gaan hose.

For right now tho ill have to get the timing intact where it should be, the carb does smell like gas when i crank and it does not fire making me think its a timing issue, if not what one is better or are both good to add..?

Ill have to find some pics on how people mounted their converter so i can move mine if needed, Since the hose is 30 inches with elbows at each end. I had no idea that it would hurt.


thanks..

[Steptoe]

You are trying to pre emept everything before even knowing if basics like timing are even within a wide ball park.
One thing at a time, stage by stage....

My hose, just measured it ..just under 345mm...off the top of my head thats 13 or 14 " ??

This impco with EC1 convertor cover...obsoleted back in the 80s.
Ideally should no be faciing forward as hard acceleration or braking could effect the movement of the diaphams...never been an issue
Note the outlet is pionting down...this stops the inside gumming up with oil.
And note the metal tag on the firewall...that is required by law in NZ to certify it meets NZ saftey stds and the istallation is checked and recertified every 12 months by a regist certified installer....updated with a windscreen sticker...and it is legal to supply, fill or run in NZ unless that sticker is current

[flatblack]

The ignition module in my mallory unilite distributor is toasted, its a few years old but never had a ballast resistor like needed ,im going to run new grounds and a new power wire for that. Ill be changing that in the morning along with exchanging the blaster 2 coil. That way ill know the ignition is good. I have a dial back timing light here now, and will set the timing, check and double check and adjust to where its needed. ill start at 5 before tdc to see what happens and adjust accordingly. Also just installed a new 1000ca battery earlier today.

I wont buy anything or even move anything unless i really have to after i do all of the above. I was looking and if i turned the carb and the converter i could do away with the elbows and loose almost 5 inches of gaan hose. atleast id be down to 25 instead of 30. ifd i just turn the converter i can do away with one elbow and loose a few inches of hose....that ill have to look at.

When i get that taken care of friday, ill weld the 02 sensor bung in the pipe and connect my narrow band air/fuel guage, now when i adjust the mixture i can get it to fire up but with the bad module it loose spark......so thats 1st.

Ill let you guys know what i come up with...thanks for your patience and help so far.

[franz]

For many years, the rule of thumb is to keep the vapor hose as short as possible and to eliminate any elbows. For each elbow, the hose has an effective 12 inches of length in hose resistance added to it. The longer the hose, the longer the cranking duration to refill it with propane. My personal preference is to direct mount the vaporizer to the mixer body.

FYI, you call the vapor hose a "gann hose". The company "GANN" sells LPG products and has for many years. They were the prime supplier for literally thousands of conversions. Their name is synonymous with the product, and since they had the large 1" hose made with their name on it, the name stuck as the "Gann Hose".
http://www.gannproducts.com/

Franz

[flatblack]

With my 3 feet of hose and the two elbows that makes the hose seem to be 5 foot long...that sux. Do they sell any brackets to mount the vaporizer on the engine..?..maybe impco..? also can the carb be turned so the large hose comes out the side instead of the rear..?

I was thinking of turning the carb sideways and using plastic pipe to mount them togeather, using a piece of aluminum and making bracket that goes over the valve cover. Do you guys know what thread the gann fittings are..?

[franz]

I routinely mount the vaporizer on its back direct coupled to the vaporizer with a short pipe nipple. I then reinforce the vaporizer with a length of metal bracketry and secure to the engine someplace.

Even though its done, I dont recommend mounting the mixer on its side, the body will wear from the three metering rods vibrating in their guides.

Franz

[storm]

Even though its done, I dont recommend mounting the mixer on its side, the body will wear from the three metering rods vibrating in their guides.

I think he actually means turning it 90 degrees on the baseplate so the LPG inlet pipe is directly facing a valve cover, that way he can make a direct connection to the regulator without the hose.

[flatblack]

i just made an aluminum mount that makes the vaporizer sit next to the carb on the left side, there will be 8 inches of hose and one elbow. Unless i use two straight fittings And bend the large hose in a u shape. To hook this up ill have to see what size the pressure hose fitting is so i can put an elbow there to connect the line so it follows the firewall and down the frame.

[flatblack]

Even though its done, I dont recommend mounting the mixer on its side, the body will wear from the three metering rods vibrating in their guides.

I think he actually means turning it 90 degrees on the baseplate so the LPG inlet pipe is directly facing a valve cover, that way he can make a direct connection to the regulator without the hose.

Storm thats what im saying, turn the carb and the vaporizer so the large fittings face eachother so the hose would only be 3 inches at most or use pipe and connect the two of them. The only thing to that is the other fittings face different directions so a few adapters and elbows in the pressure hose will need to be used.

[Frank]

To hook this up ill have to see what size the pressure hose fitting is so i can put an elbow there to connect the line so it follows the firewall and down the frame.

I believe you are looking for a Fairview PN 49-6B (Elbow, brass, 3/8" Flare x 1/4" MNPT).

[flatblack]

Where is the best place to buy those fittings. I just looked, the fiting i would need is a 1/4 npt (i think) thread female to male elbow. It would go between the lock off and the strainer to aim the pressure hose to the right side.

[flatblack]

I was just looking at it and with the room i have ill prob have to use the 1 elbow and a 10 inch piece of hose. I have it figured that the lockoff would aim at the firewall, a elbow out of that, then the strainer. I made a bracket that bolts to the bottom and would bolt to the intake to make it more rigid. I have an extra foot of pressure hose at the rear of the truck so i can unbolt it and slide it forward. But the coolant hoses are at the front of the vaporizer, ill prob have to put eblows on them and run longer coolant hoses. I hope that the coolant hoses being longer doesnt effect the flow. I cant turn the vaporizer any other way to make the hoses shorter, it would make the pressure hose aim the other way. The coolant hoses also would be long to go around the side of the heater box.

[Steptoe]

Where is the best place to buy those fittings.

Trade plumbers supllies

I would have mine closer..would not be hard to do..but its a trade off between asthetic looks
I suspect mine would be about the max one would like to go as far as cold starting
On a frosty morning after standing a good 24 hrs, I turn the engine over till the oil pressure light goes off, then rolled a cigarette, turned over and fired almost straight way as the oil light goes off again.
The problem I have now is I gave up smoking 2 weeks ago and cant find anything else to do with the 10/20 secs time

[flatblack]

The fitting i found, is there a certain kind of teflon tape to use or is the white ok to use..? my vaporizer will be over the valve cover right next to the air cleaner, thats about as close as i can get with the air cleaner fitting. Id buy a different kind of filter but i just bought a new powder coated black bowtie with a k&n filter and that was like 70.00. I hope the idea of this being moved helps alot, id hate to move it and it be the same, thats my luck.

[storm]

The fitting i found, is there a certain kind of teflon tape to use or is the white ok to use..?

In Australia we are required to use Yellow thread tape as it is high pressure where as the white tape isn't.