Carb Flooding

[ArdWrknTrk]

C.Jett wrote

Jim, can you find part # for egr valve, 85 f150 4.9 l, s/b carb, auto trans, l/B, XL, red and white, chrome bumpers and white lettered cooper tires.

Don't think for a second that I didn't chuckle!

But, are those white lettered Cooper tires, All Season, All Terrain or Mud+Snow?  🙄
Are they nitrogen filled?!?  🤔

(Even the 15 year old girl behind the counter at AutoZone should know the answer to this) 😉

[85lebaront2]

For anyone interested, Advance Auto is running a special on muffler bearings.

[Gary Lewis]

Will they work on the dual-in/single-out mufflers?  I’ve had fits finding those.

[C.Jett]

Jim, all season and no. My secret is out, I trade with Auto Zone and Advance Auto! She said she was 19! CJ

[C.Jett]

Bill, thanks, now I know why my muffler makes a noise. CJ

[C.Jett]

Yes! I need to know too. CJ

[C.Jett]

Meanwhile, do you think Integral Back Pressure Transducer EGR Valve #9D448 will solve vacuum pressure release problem? CJ

[ArdWrknTrk]

Don't go for that jailbait CJ! (unless you're in Utah. 😉)

I think it 'could' work.  😆
(9D448 is the base part number for ALL Ford EGR's)
Lemme find an EGR vacuum valve from MY trucks diagram to go with...

[ArdWrknTrk]

Have you read this thread over on FTE, CJ?

[C.Jett]

Darn good info Jim. CJ

[ArdWrknTrk]

I have my moments....

I see that all the 300 EGR's are kinda offset.
I need to find one of those with a bleed down, and a good number for an inline vacuum valve like on my truck.
(but I no longer have ANY ewissions equipment, so I gotta go digging)

[C.Jett]

The FTE thread says egr need cats to work, I have none. Were cats used before egr’s or vice-versa or what? Am I chasing a unicorn ? CJ

[ArdWrknTrk]

EGR needs some back pressure to work....

Do you have a muffler on your truck, CJ?

[mat in tn]

yes, the egr needs a pressure differential. in the natural environment of an internal combustion engine, you will have both intake vacuum and exhaust pressure. either of these will induce egr flow. higher vacuum, greater exhaust pressure will induce the most of course. there is a fine line between starving the combustion of fuel and oxygen vs being totally ineffective. these are calibrated as part of the designed tune even if a little generalized for mass production. egr is NOT needed for an engine to run or even run great but it can reduce stresses inside the engine to extend its life.

[ArdWrknTrk]

It definitely allows more advance, which generally= performance -&- economy.
(The title of a great Vizard book!)

[C.Jett]

Soon as I can find a bearing to go in it. Will muffler be enough to work egr? CJ

[C.Jett]

Thanks Matt, see post to Jim. CJ

[mat in tn]

muffler should do it along with a full-length exhaust. especially if you are using the factory style canister.

[C.Jett]

Thanks Matt, canister?  As in muffler? CJ

[ArdWrknTrk]

CJ, I think the trick is choosing one of the 5 different EGR valves to work with the tune of your aftermarket carburetor.

I don't have any info on which ones flow what amount of exhaust ..

Maybe Bill or Gary has some insight???