I haven't looked into engine stuff much at all yet, I have been too busy messing with the back end so far with this car...

I found out that my carb is not the right one, and that I have a non-standard accelerator cable mounting bracket. I found a site or two, and one of Lars How To documents that I have a feeling that I will be looking over a lot more this winter.

Here are some things I just found out about my carb…

The carb on my (manual 327/350) ’68 is apparently one from a ’70.

7040213

70 - Rochester
40 – 1970
2 – 49-state
1- Chevy
3 – Manual

4-brl 350 Corvette, Chevelle, Camaro and Nova Manual trans

7040213 CHEV 70 VETTE 350 4-SPD

From the Lars tuner paper…
Application - Chev 70 Vette 350 4-spd
Main Jet - 76
Main Rod - 44
Spring - 7036019
Sec. Rod - BA
Jet Area Cruise - 3.0159
Jet Area WOT - 4.0055

So, here are a slew of photos, is there anything else that can be gleamed from them?

photo 1 photo 2 photo 3 photo 4 photo 5
photo 6 photo 7 photo 8 photo 10
photo 11 photo 12 photo 13 photo 14

As far as the the bubba accelerator bracket, I believe I have found the one I need, is this correct?


MODEL - 68-73 Q-JET ACCEL CABLE MOUNTING BRACKET
Part # 3459209
labeled P

 

Yes, that is the proper bracket
Dont forget to order part #3425199 (the clamp) and you might as well order the bolt that holds the clamp to the bracket #3425225

 

Here are the things I can see wrong:

1. Incorrect (coat hanger) choke rod between carb and divorced choke
2. Serious Bubba going on with the fuel inlet fitting configuration - the carb may have stripped inlet threads and this is the reason for the odd fittings.
3. Throttle cable mounted to incorrect position on throttle lever: The cable is in the top hole in the lever. In this position, you do not have enough throttle travel to get wide open throttle on the secondary side. Position the cable ball in the lower hole.
4. Throttle return spring in incorrect location. Spring goes from bottom of lever back to the throttle bracket (which you already know is incorrect).
5. I don't see a hose for your vacuum advance... is it hooked up?
6. The choke pulloff looks old - be sure you suck on it and verify it works and that it holds vacuum.

 

Kind of figured something wasn't right with those being open all the time. Is it called a choke rod, and is that a part that I can get separately?

This one's likely going to have to wait until winter, and/or I get a bit more adventurous about taking the complex parts apart. It does seem to work, so it's on the 'later' list for now.

I'll have to check it once my new bracket comes in. Currently, if I move the cable to the lower hole, it shortens the distance, so I have no accelerator cable movement whatsoever.

I'll move that when the stuff shows up The assembly manual has that and the cable position marked fairly well.

I have a set of vacuum advance hoses coming as well, that hose was completely missing, as is the one going from the valve cover to the air filter. So are the three that are involved with the wiper fluid. As is the wiper fluid bag. As is half the screws in the car. The parking brakes... the roof latches.... and on and on

I hooked it up to the minivac and it held 15 psi for as long as I let it sit. ~30 seconds. I then cleaned it up and made it look a little less old

Hopefully, when I take it to the austin car gathering this weekend, there will be some carb gurus who can check it a little closer, as well as any other engine issues. I have taken apart my motorcycles carbs before, but they seemed quite a bit easier then this one. I found this diagram that helped me ID what you were taking about :p


Since I have the wrong carb but it seems to work ok, I'm guessing that isn't too big of a deal.

 

I got a set of Vac advance hoses, and I think I messed up and got the '68 set to match the car, not the '70 set to match the carb... It would appear that the Vac advance is slightly different between the two. The short one is too long, and the longer ones are too short :p

If anyone would be willing to PM me with the '70 AIM sheet that references the vacuum advance, I would like to add it to my '68 book :p

so.... I can't tell where one of them goes. I believe it goes on the back side of the carb, on this tube. Taking a look at my AIM, it would appear that I am missing everything on H194 (Vent Hoses) & H195, Diverter Value & A.I.R. hoses. The hose in question is on H195, #3927154 (HOSE SIG.) and is labeled as Smog Diverter Valve to Car RH Front. Is there somewhere else to hook up the 'extra' cable, or do I need to go through Mom's basement and see if all this smog stuff got shoved into a box instead of tossed?

 

Maybe Lars can confirm this, but "the tube" you refer to on the '70 carb is a "fresh air" port. The 1970 engine had a TCS (Transmission Controlled Spark) system. The vac advance was hooked up to a solenoid that controlled whether the advanced would be used or not. On a 4 speed car, the vac advanced was only used in 3rd and 4th gear while the engine was warm. If the engine was cold, the advanced was used to help the engine run. If the engine was too hot, it used the advance to cool things down, that was the intent, anyway.

I do need a '70 carb, by the way. Mine does not have "the tube", and it needs to.

 

I was looking through a catalog, and saw the vac advance diagram for the 70 carb and saw it was indeed a different package, along with the solenoid . Now I'm a bit unsure what to do, as the solenoid is a $70 part. Apparently, the 7028219 carb that I should have is virtually imposable to find.

 

Sorry about more bad news, but it is more than just a solenoid. There is also a temp. sensor, a relay, a switch in the transmission, and all the wiring.

 

HEY!!!!!!!!!

I found this on the net:

1968 Quadra Jet Carburetor 327/350HP. Serial # 7028219. Rare carburetor. All done over. Call John, (401)212-0947 (9/07)

 

I gave him a ring, so you can drop his info out if you want.

I have not even tried to get a 7028219, how much are they worth?

Oh....

You give me a '68 carb, you can have my 70... sound like a deal? :p