Hi, tried doing a search but could not find an answer. I am running a stock model a 4 cyl. but with a model T tank in the rear of the car, not the cowl tank. Because I cant gravity feed the carb anymore I bought a 6 volt electric fuel pump but even with a regulator turned way down, There is way too much fuel and it runs out of the carb. I have run this engine off of a boat gas can before and know the carb is at least ok. I guess my question is how to get the right amount of fuel from the tank to the carb. I am running a tiliston (spelling) carb and an oval model T tank. Thankyou in advance, sorry if this is a real stupid question.
Some of the cheap-o regulators won't adjust much below 4-5 psi - this may be too much for many of the early carbs. You need to be able to adjust it down to about 2-3 psi...
Thanks for the replies. I'm going to google the adjustable bypass valve and see where to find one. Getting this noodled out will relieve alot of frustration.
check the weber stuff, think they liked about 3.5psi of fuel pressure and should be pretty easy to get regulators for.
Wow I got A friend with the same problem! oh it's you! go build some door you dead beat. who let A carpenter on here anyways LOL Jared
Well la de da, "my cars run so I'll pick on the new guy." Figured I'd take a break from work and try to get my car done. Maybe I'll actually get to drive that bucket this year
We built a small tank over at the same height as the head and put a large return line 3/4 of the way up the tank. There is always about 2 quarts ready to be gravity fed to the carb and the rest runs to the tank. We stole the idea from an old hit and miss gas engine.
Check Mac's, www.macsautoparts.com , or Sacramento Vintage Ford www.vintageford.com ,or Snyders... can't find my catalog. They have 6 volt pumps, shut off valves, etc... As your learning, they don't like much fuel or oil pressure. Good luck!
We are finishing up a Model A speedster project http://www.jalopyjournal.com/forum/showthread.php?t=247371&highlight=speedster We ended up using a 10 gal poly tank in the rear with a 6 volt fuel pump from a swap meet. We are using an adjustable fuel pressure regulator from Mr Gasket we got from Summit. It's adjustable from 1 - 6 psi. We're running it at around 1.5 to 2 right now and the motor is working just fine. Oh, and we also have a separate toggle switch for the pump so it can be switched off separate from the ignition. Here's a link to the regulator: http://store.summitracing.com/partdetail.asp?autofilter=1&part=MRG%2D9710&N=700+400330+4294880914+115&autoview=sku
If you have the little round chrome regulator and it doesn't work right out of the box, it must be adjusted by putting it on an anvil and pounding it flat, then getting a real regulator like the low type Holley.
Use the low pressure Holley regulator, range is 0-4 psi. You will need a temporary gauge in the line as the regulator must be set with the motor running.
Has anyone realy used A hand pumb to pressurise the gas tank? Adam and I were wondering how offen you would have to pumb it while driving around.
I saw a bit of ancient info on the pumping bit in probably one of the old California Bill Or Roger huntington books. Hand pumping only keeps the thing pressurized briefly, and many early racers lost out when they forgot to keep up pressure. The manual I remembered suggested backing up the hand pump with the car's original fuel pump, now pumping air! Not an option if engine is Model A, but that could be achieved with other forms of pump.
Pumps where used for alchohol carb mostly....alchi being 3 times larger than gas needs to be forced a little....also in those days....30's the alchi would eat up the pump diaphram...that's why the had to pressurized the tank and used hand pumps and or fuel pumps pumping air to do it. As you've heard 3psi max and 2 psi is plenty. Bratton's Model A Parts sells a newer style needle and seat for the tollisen's I think. You might take to them about it. It's supposedly takes more pressure....may 5-6 psi before it lets too much in......keep those bangers going!
Lot of good posts already on it but if you still have any questions you might ask Kenagain he knows alot about Bangers and is a real nice guy. He might be able to help ya.
I would recommend that you install a pressure gauge, I have had problems with pumps and regulators both. I have a NOS hand pump that I plan on using on my next build, which will be a " Speedster ". My brother and his friend used to cruise around in an A V8 with a hand pump, ( Late 40's). I think they tried to keep the tank pressure at 10 lb, It was one of those hot rods with a dash full of switches and gauges, two of which were for fuel, one for tank pressure and one for regulated pressure.
The Jalopy Journal
