Perhaps you should consider another fuel delivery method. My low pressure fuel pump has no check valve. I have no accumulator. There is no rest pressure of any sort in my fuel lines (pull the filter loose and you're lucky to get a drop of gas from the hoses themselves). Yet my little 4-6 PSI pump has absolutely no problem clearing the lines of whatever vapors may be in them and filling them with yummy gasoline. If I can do that at low PSI, why can't K-Jet do so with high pressure. Remember that I'm using the stock RPM relay and pump wiring. My pump is mounted in a stock tank boot. With the exception of lower line pressure, and the fact that I do not have the benefit of a continuous loop back to the tank, there's absolutely no functional difference between my car and a stock delorean until you get to the intake manifold. Yet I have absolutely no problem starting my engine, hot or cold, good mood or bad mood, hair standing on end or combed neatly. You do the math. BTW: "Vapor lock" refers to a suction pump's inability to pull fuel from a remote gas tank. Feel free to look it up. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@...> wrote: > > For crying out loud Bill, get your facts straight. K-Jet has a problem > with fuel vapourising in the lines unless a certain pressure is > maintained. Why? Another word for vaporising is BOILING. Petrol has a > much lower boiling point than water, so your analogy about domestic > plumbing is pointless, AND you confuse it by talking about air ingress. > Engine get hot, fuel get hot, fuel boil. Increase boiling point by > increasing pressure. Basic physics. > > I had a euro spec car in that didn't have the evapourative system and > the fuel was literally boiling in the tank on a hot day. > > K-Jet suffers because of the fuel held in the injector lines between the > metering head and injectors - ie the point of injection and the "valve" > (or faucet - tap to us brits - if you prefer) controlling the flow. > > Martin > > content22207 wrote: > > Vapor lock has not been a problem for a half century. Dual diaphragm > > fuel pumps introduced in the 1960's eliminated the last vestiges of it. > > > > Of course the likes of Lou Costa, Kyle Franklin, and myself have > > absolutely no problems because our fuel pumps are located in the tank > > (electric). Vapor lock was a suction problem, not a pushing problem. > > That's why I roll my eyes every time a K-Jet owner claims his car is > > vapor locked. If us carbureted owners can push air out of the way with > > 4-6 PSI, a K-Jet owner is certainly able to do so with 75-80 PSI. > > > > Think of it this way: Our fuel system is no different in principle > > than household plumbing. When was the last time anyone shut the water > > off for a repair, then couldn't get a faucet to work later because air > > had been introduced into the system? Water pressure forces the air > > out, then here comes the liquid. And that's at a mere 28 PSI or so. > > > > Please use accurate information when disparaging carburetion. > > > > Bill Robertson > > #5939 > ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/