My new stock stroke 400 build

[qkcuda]

One strange thing is the heads were never off of the engine before, but if you look at the end of the passenger head, there is dark green paint under the blue?

 

[RemCharger]

Not sure on the green paint,, but I like to put a pair of gaskets on the valve covers so you don't end up with the dreaded ring of no paint when you put the real covers on

 

[qkcuda]

I got the carb back after my buddy put it through the ultrasonic cleaner, and it turned out pretty nice. For some reason the carb came with 68 jets in the primary while most 1850's have either 65's or 66's. I had a set of 66's so I swapped them out. I also deleted the solenoid bracket and extra linkage and installed the Chrysler linkage adapter. It is ready to swap in time for the car show on Sunday. We will see how it works. (the new 400 acted as my carb stand)

 

[eldubb440]

I have nothing to add, other than I'd love to be tinkering with an engine for a change

 

[qkcuda]

I am actually going to paint the engine on the weekend, so I'm delving into your territory. Gotta get it done before it gets cold again.

 

[eldubb440]

I am actually going to paint the engine on the weekend, so I'm delving into your territory. Gotta get it done before it gets cold again.

I saw your previous post about cleaning the block and epoxy.....

I spilled some epoxy primer on a dirty, rusty piece of frame......... it was still on there, outside and 10 years later ....... but yeah, a little heat is good. I'd warm the block with a propane torch before priming

 

[qkcuda]

It's supposed to be a little over 70 degrees here this weekend, so I should be good I think?

 

[Don Frelier]

Definitely hit it with a torch or a heat gun before painting it.

 

[eldubb440]

when you hit the cast iron with the torch flame, you can actually see the moisture come out of it

 

[71Beeper]

I saw your Charger at the Ruthven show - nice car!

 

[qkcuda]

I saw your Charger at the Ruthven show - nice car!
View attachment 1742768

Thanks, what were you driving?

 

[PRHeads]

For some reason the carb came with 68 jets in the primary while most 1850's have either 65's or 66's

As you can see by the number on the choke horn, that carb is not an 1850, but rather a 9834-3……..which does come from Holley with 68 main jets.

 

[qkcuda]

Yes, I looked the list number up and saw that. Since it came with an extra solenoid bracket I figured it was designed for a specific application (Ford I think) and the jets tailored for that. Most universal 1850's come with smaller jets. Is there likely to be anything within the carb itself that is different requiring a larger jet? I can easily switch it back.

 

[71Beeper]

Thanks, what were you driving?

I took my daily driver (2013 Dart) as my Runner's engine is hurt - see my thread in the restoration section.
Definitely a good Mopar turnout for that show.

 

[PRHeads]

The primary metering block is a different style than what comes on an 1850.
The carbs like that I’ve messed with(carbs having the o-ringed brass tube for the accelerator pump system), which are few, had what I call the “backwards” idle circuit.
If the main body has small holes that connect from the gasket surface in to the throttle bores, then it has the backwards idle circuit.
Those carbs also usually have the idle mixture screws with the larger heads.

Those carbs have a leaner idle calibration and I believe the bigger jetting is to help with the idle to part throttle transition.

But you can start with whatever jetting you like, and adjust as necessary.

 

[qkcuda]

Yes, it has the o-ringed tube for the accelerator pump. I will check for the holes you mentioned. I think I will throw the 68's back in then and see how it acts. I will only probably drive it a couple more times this year before I swap the engine. I was just trying to sort out the ignition and carb before the switch. The 400 might require some further tweaking anyway.

 

[qkcuda]

I swapped the 68 jets back into the carb. I am not sure if this picture shows the idle holes you were mentioning. I took me quite a while to bend up a new fuel line because there isn't much real estate between the distributor and the air conditioning bracketry. Not the best but it will do for now. I tested it for leaks and all was good. Tomorrow morning I will check the float level and get the idle adjusted. I will have a chance to test it on the drive to a car show on Sunday.

 

[PRHeads]

Those are not the holes i was referring to.
It’s been ages since I messed with one of the carbs with the backwards idle, so I can’t say with certainty how far up the throttle bores they were, but I’d say somewhere around the height of the mixture screws in the metering block.
From the metering block gasket surface straight into the venturi.

The holes in your pic are the idle discharge ports.

 

[qkcuda]

Thanks. I didn't look at that when I had the metering block off. I did get the float level and idle mixture sorted out this morning. I noticed a bit of hesitation cracking the throttle, so I adjusted the pump arm clearance. The hesitation was better but not gone. I pulled the discharge nozzle which was a 31 and decided to try a 35. You guessed it, I dropped the little metal gaskets into the carb. I was getting frustrated and I had to go out anyway, so I left it until tonight. A magnet attached to a screwdriver didn't work, and I figured I would probably have to pull the carb. I finally managed to get them out with some duct tape on the end of a screwdriver. It is now ready for the car show but no time to road test it.

 

[qkcuda]

I drove the car to Pumpkinfest today. The weather was awesome, over 70 degrees Fahrenheit this afternoon. Well over 1000 cars there, and they were turning people away. I still have work to do on the Holley. There is an off idle stumble when pulling away from a stop, and a flat spot at part throttle. I think a new pump cam and power valve will solve the problem.....maybe.