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4300D Carb Flooding - replacement?
#11
(09-25-2018, 08:47 AM)Andy 351C Wrote: By using the adapter and new carb, did it change the overall height much? I have a 73 Q code as well, along with Ram Air. My 4300D is working pretty good now....but I had it apart way too many times, to bend the float bracket, so it wouldn’t hang up in the bowl. I’m always leery of it flooding again when I take it out and I don’t trust it.


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Hi Andy - the adapter is 0.85" tall - so it does increase the height..... we were a little worried, but i don't have the ram air and it fit fine. I would expect it would push the envelope with that add-on since it  the ram air foam seal has to fit well around the air cleaner. 
[Image: IMG_3209_1.jpg]
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#12
Thanks for the info Tim. I wonder if I could eliminate the EGR plate to gain the thickness of the adapter plate? I’m not sure if that’s even feasible.


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#13
(09-25-2018, 09:33 PM)Andy 351C Wrote: Thanks for the info Tim. I wonder if I could eliminate the EGR plate to gain the thickness of the adapter plate? I’m not sure if that’s even feasible.


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From what I've learned from all the wisdom on these pages, is that the stock manifold has a small "v groove" cut into it that aligns and locks in the EGR plate, so if that plate is removed, there is the problem of dealing with that remaining groove in the manifold that several folks noted is problematic if not impossible to seal off when combined directly with a new carb with a smooth flat bottom plate (even with the gasket).
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#14
Got it.... I believe down the road, I’ll replace the intake along with the carb like most do. For now it’s running pretty good, so I’ll stick with the 4300D. Thanks for your input, it was very helpful!


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#15
(09-26-2018, 08:53 PM)Andy 351C Wrote: Got it.... I believe down the road, I’ll replace the intake along with the carb like most do. For now it’s running pretty good, so I’ll stick with the 4300D. Thanks for your input, it was very helpful!


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 Not sure if this helps as this takes a bit of nerve and sounds a bit shade tree. I had to keep mine to the numbers and was tired of the leaks and had problems with aftermarket carbs. Hard to do to 1 of 398 HO carbs but its done now. Learned this from a old Ford mechanic. 

 Bowl cover distorts is the downfall of this carb. Took bowl gasket out. Fit cover by tapping flange GENTLY with wooden dowel on a flat steel plate until it was in .001 gap all the way around. Then put in the thicker .045 gasket. Ran just shy of 2k so far with just a little wetness at the gasket. You may want to just try the gasket.

 Test stand Dyno report had torque and Hp readings to 5800 better than the test Holley or the Edelbrock when I rebuilt the engine in 2017. I like the drivability better also. R code with quench heads along with cam selection may be be why it likes the air fuel ratio, who knows. I found the Idle stop solenoid a must to shut down properly with the higher compression. Dieseled terrible with the other carbs and starts best with the 4300D. Zero pumps as long it has not been sitting for a week or cold. Just saying that they can work well if set up right.

Gasket Link

https://quadrajetparts.com/ford-4300-435...-1984.html
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