When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Checking lines as John says is good. That point is a mounting point so there should not be any fluid there. Wonder if it is coming from the bellow just beside it. You would have to wipe everything down. Then go for a drive and put it back in the air, perhaps then see something. Minor leaking is tough to find.
The 780 carburetor which was supplied with the 502ci engine did not really harmonize with the engine. The fuel consumption was very high. An experienced mechanic recommended converting to an 850, which would probably reduce fuel consumption. So I ordered a Holley 850cfm Street HP. After fitting it, I quickly discovered a leak in the brand new carburator, the float chamber seal had not been fitted correctly at the factory.
Fortunately I had taken precautions and ordered float chamber gaskets, I hope that the carburetor will then be tight and I can start tuning.
For tuning I've ordered a cheap AFR wideband gauge clock with a wideband O² Sensor. I'm curious to see how it will work.
first try, but i had to stop because of the leaking Carb.
My windshield wiper does not work as it should. First of all, I noticed that there was a lot of play in the linkage, so I ordered a new Wiper Motor link.
Two questions:
what is the correct assembling orientation, first pic or second?
the link I that was installed has two surfaces in the bore, so the bore is not round. The new lever i bought simply has a round bore, how is that in the original? Do I possibly have an aftermarket wiper motor, which is why the two flat areas are in the bore?
As for the carb, I don't know how going from a 780 vacuum secondaries to a 850 double pumper is going to help fuel consumption, but good luck.
Dave,
the 502 motor generates a large vacuum. If the carburetor is small, a high gas velocity is achieved due to the high vacuum, which sucks in a lot of gasoline...that was the basic idea, but we'll see.
Dave,
the 502 motor generates a large vacuum. If the carburetor is small, a high gas velocity is achieved due to the high vacuum, which sucks in a lot of gasoline...that was the basic idea, but we'll see.
Bigger carb = bigger jets to stay the same . Jetting down your present carb would reduce fuel .
This is what I tried first, jetting down the existing carburetor, the fuel consumption was lower but at full throttle we no longer had full power. I´m also considering an EFI Sytem.
Odd that jetting down primaries would have a noticeable affect on full throttle in a street truck . I obviously don't know your mechanic but someone with an in depth knowledge of carburetors should be able to get things working better . That being said when the decision to run a 502 was made I doubt that gas mileage was on the radar . LOL PS my 35 dodge with a 400hp sbc running at 2800@70mph makes 17.5 ( converted to us ) mpg with a 625 edelbrock .
I worked at a speed shop for years and built lots of Holleys and back then Carters (now Edelbrocks). Jetting and venturi size, along with some adjustments in the metering block, dictacte A/F ratio. A big concern on vacuum secondaries is the diaphragm spring and we can't forget power valves. P/V are equivalent to approximately 10 jet sizes. So if diaphragm spring and P/V's are not dialed in mileage and performance will suffer.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
