Watch "The Ultimate Vacuum Advance Video Part 1" on YouTube
Yeah I got one .Al 66 GTO ?
Yes, David Ray has built/tuned distributors for many people....Yeah I guess if you want to hand the ball to someone else then Dave Ray would definitely be the guy .
Thanks...I'm trying to optimize the ignition timing and vac advance etc on my truck.David Visard is one of the very best of the good guys, but, he also does a lot of dyno work, and flow bench as well, and there are severe issues with final tuning an engine on a dyno. Dyno's and flow benches are GREAT tools for developing engine components. Also, AFR gauges are NOT final tuning devices, they are EMISSIONS parameter devices to get an engine into a wide specification for EPA certification. To try to use an AFR gauge to tune an engine is pure fantasy, and way into the fluffy cumulus clouds. ,
I own two full dyno's, one engine, one chassis, and three flow benches, one a dry air flow, the other two are wet flow (air and liquid media), one is a constant flow, the other is an impulse flow (this one actually takes ONE charge at a time, mimicing one intake port flow event). I hand built the last two flow benches, MYSELF.
NOT ONE OF THOSE DEVICES ARE FOR FINAL TUNING ON STREET ENGINES, OR, RACING ENGINES, FOR THAT MATTER. Now, once yu get the seat of the pants settings done, yes, run the testing on the dyno, AFR, as the base lines to set after mods, repair, but, NOT AS THE FINAL TUNING DEVICE.
The best, and only final tuning device I use is set inside the butt area of my pants, and needs the engine running, car driving, and me, sitting in the driver's seat. "Seat of the Pants" dyno
As far as my "bad Attitude", when I get called some name, or "stupid", after ding all this, from factory development to race, to street development, for over 45 years, yup, I defend myself, and my actions, info and help to others. Some people do not make enough money to try what 20 people erroneously tell a person to do to "make it right". I want to get it done the first time, and if someone can do it efficiently, correctly, and not break the bank doing so, I am all for it.
Many people have proved me correct.
It is just that simple.
Email him and he’ll send you a packet with tons of good info. That’s what I did when rebuilding a junkyard GM HEI. Works perfectly.Thanks...I'm trying to optimize the ignition timing and vac advance etc on my truck.
89 k2500 with a mid 70's 350 in it .
Msd "street fire" distributor that has an adjustable vacuum advance canister on it .
Can you point me in the direction of one of your more comprehensive posts or videos or anything that might apply to what I'm trying to achieve here ?
Yeah I looked on his website and yes he asks people to email him . The only thing is though it looks like it looks like he's more converting old distributors?? I'm not sure what id be asking for because I don't need that.He helped me with my old 454, ran great after following his instr., have to find that email for my new engine
If you want a full write up and pictures on just how to properly set vacuum advance degrees to work right, send an email to: [email protected] and ask for the "vacuum advance package". It is free.Yeah I looked on his website and yes he asks people to email him . The only thing is though it looks like it looks like he's more converting old distributors?? I'm not sure what id be asking for because I don't need that.
The instructions that you attached in post #15 are not for your MSD Streetfire distributor. The instructions you posted are for an advance "spring and bushing" kit to be used in a completely different type of distributor... and the advance bushings can not be used in your Streetfire.I'm running this msd street fire .
Right now I'm at 18 initial and all in at about 28 or 2900 at 36 degrees.
The above is true for the MSD "Full Billet" line of distributors (and similar copies)... but there is no pin on the MSD Streetfire HEI that can except an advance bushing to change/limit the amount of mechanical advance.The rotating shaft keys into a slot. By bushing the pin, or key, you limit the amount of mechanical advance. If you take the rotor off and work the weights you'll clearly see the pin and slot.
Here's a couple I took last night loading the block into my truck. Itss .030 over 389. Its headed over to the machine shop tomorrow to replace the cam bearings the first guy butchered in there .Al 66 GTO ?