800 CFM Four Barrel Street/Strip Carburetor

[rdc767]

Talk to Holley tech and they recommended getting the right metering block . They didn't have the part number on hand??
I went to summit and searched and came up with HLY-34R11196AQ. The orginal jets where 71 and 85. Is that a good place to start? I might be a little big with 800cfm. Should I drop down on jet size or does that matter to get a proper mixture.
Ron

[wtm442]

Ron
I looked at that Summit part and it looks like the right one. You want to use the new one in place of the one with idle screws and no provision for power valve. I'd leave the 71's in the primaries, unless you have any smaller ones (65 - 68's maybe). I assume you have not started the engine yet and need to break it in. I'd also install a 65 power valve.

If you have not run the motor yet, I would not go full throttle until at least 30 minutes at about 2800 - 3000 RPM to break in the cam, unless you have instructions for a different type of break in period.

I would also put in some smaller jets (around 74 to 76) in the secondaries during initial start up. You do not want to be too rich on initial start up.

The 800 cfm carb is a little big for your cubes, but it will work.
Good Luck

[rdc767]

thanks warren
yep new engine. good advice on the jets 65's-74's. I also bought a the holley jet kit 39-99's so I change them around.

What I've read on flat hydraulic lifters if you need zinc and a 30 minute 3000 rpm break in. I'm hoping to get this right and not cranking to long on initial start up. I don't want to flatten the cam. 
Ron

[rdc767]

.Alright I got the new primary metering block with the power valve hole. I used the 6.5 vacuum valve.
It went together well. I used 68 jets in the primary and 76 in the secondarys.

I have a question on the accelerator pumps. I have the cam set to squirt the primary pump as soon as the throttle opens. This works well. And the cam and arm don't bottom out the primary pump.

Should the secondary pump start to squirt as the secondarys open? If it does…..

I cannot seem to figure out on how to set the cam on the secondary accelerator pump to start as they secondary butterfly valves open and not bottom out the accelerator pump

Secondary Side




Primary side upside down

[wtm442]

Are both acc pumps the standard 30 cc variety? It looks like that in the picture. The thickness of the pump housing should be the same on both acc pumps. If a 50 cc pump was used, it needs different hardware as compared to the 30 cc pump.

But you might have 50 cc Reo pumps on both bowls. The pictures are not clear enough. Check the thickness of both housings and make sure they are the same.

The pump cam looks like its brown. The brown and yellow cam (if my memory is correct) are only used on a 50 cc pump and should not be used on a 30 cc pump.

Is that a white pump cam (stamped 218) on the primary side?

The Holley way to adjust is to open the throttle all the way (WOT). Push the pump arm lever down and then adjust the pump override spring to obtain .015" clearance between the pump arm and lever.

I like to take 2 wrenches on the pump override spring, and back off the nut until there is clearance (free play) between screw head and the pump arm. Then tighten until the free play is removed. Then go to WOT and check to see if you have clearance (at least .015 ").

Last but not least. Its been a long time since I looked at an acc pump cam from below like your picture. Is that brown cam installed correctly? It looks like it might be ass backwards? Can you install a pump cam incorrectly? Its been a long time since I changed one.

Good Luck - if the above does not help, send me a PM with your tel # and we can talk about it.

You might want to set the date on your camera.

[rdc767]

The rebuild kit came with 4 new diaphams for the pump. 2 big (50cc) and 2 smaller ones. The small ones match the old ones.

The secondary cam is brown. That makes sense it would be for a 50cc. The ramp up is too great. If I use the 1 hole it binds the accelerator pump before I can go to wot.

I'll buy a cam kit for the carb and go from there. Thanks a ton.
Ron