Carburation Ideas

[crossboss]

The Edelbrock carbs are made by Weber. They are almost an exact copy of the older Carter carbs. Both versions are an excellent performer, and very reliable...aka 'set it and forget it'. I speak from experience, used many on different makes and engine sizes (CID). That said, they wont have the 'look' for a DZ type of engine though...IF that is a concern.

[crossboss]

Also, Summit makes/sells a close direct copy (with their name on it) version of the old Autolite 4100 series of 4V carbs, known as 'The Cracker Box'. Its a great performer, highly tunable, excellent throttle response, and extremely reliable. Again, it wont have the correct 'look' for a DZ engine. Many choices out there...

[WaltZ]

FIXED: FUEL PUMP
Prior to all the tinkering, adjusting and frustrations I tested the psi, 3 different times,  had 5-6 pounds..
yesterday, the fuel pump decided to leak, quite badly, around the upper and lower sections thru the ring.
An obvious replacement was done and guess what, NO MORE HESITATION.
Totally a bad coincidence; pump started failing when restored 780 was installed.
I guess the assumption that a mechanical fuel pump is either good or bad has not proven to be.
Was so happy that I drove the car like I just stole it!
Thanks for all the help.

[usa1ti]

Great to hear! Sometimes if the mechanical diaphragm leaks externally through the weep hole it has leaked internally into the engine. Change the oil and filter just as a precaution.

[WaltZ]

Thanks, ahead of you on that.

[WaltZ]

Amazing what 100s of an inch can do
found an old 2007 post from Jerry and tried his configuration
72s in the primaries and 76s in the secondaries both with 6.5pvs
no more stutter no more stumble.. A whole new beast to say the least.
tuned vacume on carb as recommended and added 1/4 turn
I run the timing at 10*/ 38 with 93 Sunoco......... temp is about 190* 
tried 77s in the secondaries and above 5000 ran extremely strong, but settled on the 76s for my driving.


Thanks to Jerry's old post and everyone's help on this. Zoom Zoom!

[jdv69z]

Amazing what 100s of an inch can do
found an old 2007 post from Jerry and tried his configuration
72s in the primaries and 76s in the secondaries both with 6.5pvs
no more stutter no more stumble.. A whole new beast to say the least.
tuned vacume on carb as recommended and added 1/4 turn
I run the timing at 10*/ 38 with 93 Sunoco......... temp is about 190* 
tried 77s in the secondaries and above 5000 ran extremely strong, but settled on the 76s for my driving.


Thanks to Jerry's old post and everyone's help on this. Zoom Zoom!

Same setup I run. Works well for me.