Oh I understand that there are many variables and each engine combination responds differently. I'm not trying to tune to 1/10 of a horsepower. I'm only trying to move closer to a performance curve vs emission curve.
That's why I focused on just a few questions in my actual post. As for the title, I've found that not being a regular poster, unless the title grabs attention, no one bothers to read or respond.
To many variable's kinda like ordering a custom built mail order Russian bride !!!Thanks for all the input. Lot to think about. I was thinking that proven combinations were a little more cut and dry. Guess I'll have to tinker.
Here's one of them: Large RPM and Vacuum drop when shifting from park to gearIf you're interested in doing it all yourself, I've posted about how to change the start of the advance, how to slow the rate, and other adjustments. I didn't post link to those 'cause figured you had enough to read through now.
My bad. Somehow I read what you posted as duration at .050I'm surprised by the cam comments. It has shorter duration than a factory 340 cam. Plus its designed for fuel injection, so its ground on a 112 LSA. I was expecting the idle to be mild.
Voodoo Hydraulic Roller Cam - Chrysler 273-360 (W/ Long Snout) 264/270
So I reassembled the distributor today. I went to check the vacuum advance and it would not hold a vacuum. The diaphragm is shot. Any recommendations for a replacement? Parts store or speed shop?
I have them if needed. Need to know what the number on the arm is.So I reassembled the distributor today. I went to check the vacuum advance and it would not hold a vacuum. The diaphragm is shot. Any recommendations for a replacement? Parts store or speed shop?
Any VA that has the hex on it so you can tune it.
Do you mean the internal Allen screw, or the hex shape on canister itself?
Don't you just hate it when every bit of new information creates more questions than it answers? I didn't realize that the hex on the OUTSIDE indicated adjustability, so I need to order a new pod. I started searching the web for a breakdown in available vacuum advances, since most manufacturers don't. I did find a paper, written by a guy called Lars. Lars is popular in the C3 Corvette forum I'm also a part of, he is apparently a whiz with Quadrajets. Here is his information, unfortunately it only applies to GMs...
https://www.crankshaftcoalition.com/wiki/images/e/e4/Vacuum_Advance_Specs.pdf
So I went to the Summit site, and started reading numbers off the pod arms by blowing up the pictures. I've found two canisters with the most built in advance (9.5), whose arms match the shape of the cannister I currently have.
DODGE Standard Motor Products VC167 Standard Motor Vacuum Advance Canisters | Summit Racing
DODGE Standard Motor Products VC-168 Standard Motor Vacuum Advance Canisters | Summit Racing
Since they are shaped the same, with the same advance, I assume the only difference is the vacuum at which they operate. On has AG6 printed on the housing, the other AG11. Is this referring to the vacuum that it starts adding timing?