The Stovebolt Site Forums The Shop Area Engine Shop Carb info, smell of gas...

Hell-o all, this is my 1st post on this site, seems like a great site
based on past reviews ! I need some help / info... I have a 1953
3/4 GMC, I have installed a sb 350 with Edelbrock manifold with a 650cfm Edelbrock carb, now the problem: when I park it in the garage overnight, the next day smells of gas, some days more than others, I have added a neopreme spacer to cut down on percolation of fuel & replaced all lines, cut rubber fuel lines to minimum, put a new tank with a baffle / fuel filter on the breather...I'm thinking that maybe the fuel pump (stock unit) may be running to much pressure to the carb...has anyone come across this problem ! The "SMELL" is defenitly coming from the front / eng. comp...any info
would be appreciated...Thanks, B

It could definately be a pressure problem. My pump puts out about 9 lbs. Im running a Demon carb but both carbs only like about 5lbs of pressure. I added a pressure regulator and dropped it to 5lbs. Works great.

After shut off the pressure may be pushing fuel past the needle and seat. not good for the motor.

STEA, thanks for the info, gut feeling say's you are right...what
type of regulator did you install ! Does yours have a pressure guage attached to show exact pressure ?!? Where did you get
the unit (Jeggs or ?!?). What can I expect to pay for a good unit !
One more thing, do you have shots of your '39 GMC Resto-rod, what mods have you done to it / her !

P.S. If fuel is being pushed past the needle seats then if I check
the oil, there should be a hint of gas in it, which means that I should change the corroded oil !?!

I used an adjustable pressure regulator from Summit and then plumbed in a small pressure gauge just before the carb.

http://store.summitracing.com/egnse...esults=false&N=+115&y=8&x=43

It worked great. Change your oil, its cheap insurance.

There are a couple pics in the gallery and I have several pics here.

http://hotrodders.com/gallery/showgallery.php?cat=500&ppuser=8163

Went to the web site, nice truck, color works, & for only $300,
were all of the parts there (other than the grill...) ! Would
love to find a deal like that !!! How about adding
some "pin stripping"
it might add a little...definition or !!!!

Was the Summit regulator accurate when
you checked it with the pressure gauge ? (What I'm saying
is, can I get by without a guage, or would you recomend one!)
Do you know if someone offers a regulator / guage combo !
Thanks again for the input...
I think I will post my 1953 on the hotrodders gallery too...good site !!!

labluver, about the only thing useable was the frame and doghouse. The cab was marginal. After 4 years, lots of part scrounging and a dollar or two thats what I ended up with.. I LOVE IT LOL

As far as pinstripping nah, never have liked it but some subtle flames are on the way. Im working on the hood now. Im welding the top halves together to make a solid hood. Side pieces will be mounted solidly. Havent decided whether to have the hood open sideways or reverse. Still mulling it over.

As far as the regulator I would recommend a gauge to be able to set your pressure. I think I paid around $75 for my regulator. My brother used a $20 generic adjustable regulator from Checker Auto and I think the highest setting is 5 lbs. And it was dead on at 5 lbs.

STEA, thanks for the info, my cousin found one that goes from 3lbs to 12lbs, if I did get that one, I would definatly usa a
guage !
I like the "ghost flames' , it would be a good look for your paint... I would hinge the hood from the side to give it that dated look, besides I think the "reverse" look is over done,
at least out here it is...the stock/resto looks seems to
work a little better, keeps them guessing !