Mr S
Posted a lot
10-4 Good buddy.
Posts: 2,654
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Just one more question from me, then I'll leave you alone, I promise! lol
Assuming your dodge has got a mechanical fuel pump running off the engine, how does the LPG system cut the petrol off on a carb system like this? Having only done injection systems, it just turns off the fuel pump, simple, but what does it do on this?
I'd assume there is a solenoid in the fuel delivery line between pump and carb, but wouldn't pressure build up behind it whilst driving on LPG? Does it have a return line or something?
You'll have to let me know how it drives, how much power loss you notice with it etc.
Cheers, and sorry for all the questions!
Martin
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Suzuki GSXR1000 K2
BMW R1150GS
BMW K1200RS
Chevy K5 Blazer
Chevy Suburban LT
Jaguar XKR
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Just one more question from me, then I'll leave you alone, I promise! lol Assuming your dodge has got a mechanical fuel pump running off the engine, how does the LPG system cut the petrol off on a carb system like this? Having only done injection systems, it just turns off the fuel pump, simple, but what does it do on this? I'd assume there is a solenoid in the fuel delivery line between pump and carb, but wouldn't pressure build up behind it whilst driving on LPG? Does it have a return line or something? You'll have to let me know how it drives, how much power loss you notice with it etc. Cheers, and sorry for all the questions! Martin No worries sir... That puzzled me too. The control box is slighly different on a carb system. Driving on petrol, you switch to gas. The petrol solenoid is then closed, so the the engine runs on whatever is in the chamber. After a set amount of time, the gas is switched on. It does the same returning to petrol - runs on gas for a while untill the carb is full. All clever stuff. The van has a mechanical pump, but after that, it goes through a filter with one output to the carb and one to a return pipe. This is the best photo I could get, 'cause it's quite low in the engine bay...  I plumbed the solenoid in between this and the carb, so any pressure buildup returns to the tank. |
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There is nothing more expensive than a cheap Mercedes
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[glow=red,2,300]It's alive![/glow]Just filled the tank, switched to gas, and it worked! No backfires, no stalls, just works. Hurrah! Power is definately down, but I haven't tweaked any of the knobs yet. I can also hear air being sucked through the airbox, so it may be a little restrictive in there with the mixer. Will probably modify the air filter cover to allow more air in. Other than that, I'm well chuffed.  Pic shows splitter and restriction screws mounted to firewall for easy access.  And most importantly, the controller sitting neatly in the dash
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There is nothing more expensive than a cheap Mercedes
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ohh inspiring, got me cunjuring up ideas of uber economical 'slow n low' rides
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ohh inspiring, got me cunjuring up ideas of uber economical 'slow n low' rides Heheh, yeah, and the added advantage it is suddenly getting lower and slower due to the weight of the tank. Nice avatar by the way - Now where have I seen that before?  |
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There is nothing more expensive than a cheap Mercedes
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Nice avatar by the way - Now where have I seen that before? Oh I wonder !?  Anyhow, good work old chap, you can come and do my bimmer next.......  |
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Mr S
Posted a lot
10-4 Good buddy.
Posts: 2,654
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Nice one, cheers for the photos dude. FWIW, my Mrs drove 185 miles in the Merc 420SEL (that would be a 4.2 V8 weighing nearly a ton and three quarters) to the coast and back, including sitting in some traffic for the princely sum of £17.69! I love LPG |
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Suzuki GSXR1000 K2
BMW R1150GS
BMW K1200RS
Chevy K5 Blazer
Chevy Suburban LT
Jaguar XKR
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