Gramma's Car: the new project!

[Xplantdad]

Dang....and I was going to say that the screws on the choke plate weren't indexed [img]<<GRAEMLIN_URL>>/hmmm.gif[/img] [img]<<GRAEMLIN_URL>>/dunno.gif[/img] [img]<<GRAEMLIN_URL>>/no.gif[/img] [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Can't wait to follow along...and I've got to send something your way soon. Cruising season is fast approaching!

[earntaz]

I think that baby was in the St Louis flood at one time ... looked like some Mississippi silt deposits in there ... TAZ

[VintageMusclecar]

The main body is as de-warped as it's going to get, and the lid is now flat. Sometimes it's not feasible to remove all of the warp from the main body since the outer corners (where the 5/16&quot; mounting bolts pass through) actually get crushed slightly when the carb has been so badly over-tightened. If you manage to get the top of the carb 100% flat again, the bottom of the body where it meets the base will no longer be flat. You sort of have to split the difference. As long as the center of the top casting can seal against the main body where the circuits converge, chances are the carb will function just fine.





The idle pickup tubes were removed, and there was definitely enough corrosion in the main wells to warrant their removal. Unfortunately I couldn't get a decent picture down in the main well, so you'll just have to take my word for it.





Here is an OEM style fuel inlet fitting.



As mentioned earlier, the carb had been equipped with a self-tapping fuel inlet fitting. Thankfully the casting wasn't damaged too badly by the self-tapping fitting, and I was able to cut the main body for a Heli-coil insert to go back to the original thread size (7/8&quot;-20) so an original style inlet fitting can be reinstalled.

Typically, when the castings are cut for Heli-coils, most rebuilders free-hand the job which results in the threads not being square to the original threads. As a result, the inlet fitting doesn't make contact all the way around on the sealing surface which obviously results in a leak. To address this, most rebuilders install a thick Teflon washer to compensate for the fitting not being square. This Teflon washer will compress unevenly which allows it to make a seal all the way around. That said, it's pretty unsightly and sticks out like a sore thumb on an otherwise nice rebuild or restoration.





About a year ago, I came up with my own invention to be able to cut the castings for a Heli-coil square to the original threads. This allows the use of an original style thin rubber coated steel gasket.







While that may not seem like a big deal to most, to me little details like this matter.

Please note that my tooling is proprietary, so I'm not going to show that process. At this time I'm only able to repair 7/8&quot;-20 threads, I can not do the later 1&quot;-20 threads. Also, my process requires there be at least a couple of good remaining original threads left in the casting to reference from. If it's stripped all the way to the bottom of the bore I can't repair it.

SO...the carb goes into the clean line tomorrow. There's more to come, hopefully I'll be able to pick this back up within a week or so.

[scuncio]

And this is why I sent my GTO's Q-jet to you. :-)

[njsteve]

Excellent. I am definitely learning a lot already. (Note to self: find carbs in better condition!) [img]<<GRAEMLIN_URL>>/grin.gif[/img]

[njsteve]

We measured the connecting rod oil clearance today with Pastigage. The boy's calibrated eyes said they were .0015.

[VintageMusclecar]

Here's the carb post cleaning:









Not much of the original finish left to speak of.



After de-uglification:









Compare the inside of the float bowl now to the pic posted earlier:



The steel hardware will go out for plating shortly. As soon as I get everything back and get the carb back together I'll post another update.

[njsteve]

WOW! It's naked! Amazing difference before and after. [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

[MarcDant]

Carburator looks like a new casting now. Nice stock appearence again.What cfm is it.

[njsteve]

I think it is 750. Maybe Eric can give the correct info.