Well 36 less 28 equals 8;as you said. Which will be worse than the Atomic.Now you lost me. The initial timing in the Atomic ECU was around 14* with full timing of 36* at 2500. The spring tension installed in the distributor will get me to full mechanical advance at 2500, full advance at that point would be the difference in initial and the button installed in the distributor. What I am trying to determine is what should be the correct initial advance, knowing I am going to get to 36* somewhere around 2500 RPM. To my knowledge MSD does not offer a spring that will bring in mechanical advance any later than that.
I never have needed an adjustable timing light. Haven't bought a timing tape since, I can't recall the last one I bought!
I use an old inductive light from the 1980's. Works with every ignition I've ever had. It's not subject to some of the nonsense a Dial Back may suffer from depending on if you have an msd, etc.
Lots of ways to skin a cat.
Pick your parts, pay your money.
I read up until you said you are looking to get a timing tape. I believe you need to buy an adjustable timing light. Until then close the hood. Half of these replies are from guys who think they know. I cannot believe some of these replies.
I don't know what hillbilly timing tape is either, unless it's home made. In that case, you take the diameter of the dampener and multiply that by 3.14159. Divide that number by 360 (the number of degrees in a circle). Then take that number and multiply it by the number of degrees that you want to set the timing at, or you can find BDC, 90 and 270 degree marks for setting the valves. I hate math. So just for giggles, let's say you want to find 35* BEFORE TDC. It would look like this:
7.25 x 3.14159 = 22.776257. That is the distance around a small block dampener. Now 22.776\360 gives you .0632681 which is how far apart each degree is. Take that and multiply it by 35 and you get 2.214835. That is the total distance in inches you measure form the mark on your dampener where you make another mark. You line up the new mark with ZERO on the timing cover at full advance to set total timing.
All this is for not if you have a degreed dampener. Or you buy a timing tape.
Hope I didn't muddy everything up for anyone.
Work off the 0 on the damp. when you make marks. Every 1" is about 16 degrees, so for 35 degrees you need to measure/mark the on the dampener approx. 2.25" from the 0 TDC mark (towards the ds/right as you face the car.
Or go get yourself a dial back, but that's not really gonna bring the pain level you need for educational purposes lol.
BTDC = before top dead center = ADVANCE
ATDC = after top dead center = RETARDED
You want the stock TDC balancer mark ABOVE the zero mark on the timing cover if looking over the drivers fender. That is advanced and is the correct side.
As I mentioned with the hillbilly tape. If you mark the balancer as described. Set your TDC balancer mark with the 10 before top dead center mark on timing cover. Now... roll the newly scribed 15* mark even with the zero mark on the timing cover. Where did the original TDC balancer mark go? Closer to the timing cover zero mark or further away...
In the picture I posted, the bottom line is the original TDC mark, then the 15* and 30* marks. That is on the pass side. So if you roll the engine over to the timing cover mark location, the new marks will be BELOW the original TDC mark.
It works EXACTLY the same as a timing tape, except it NEVER falls off the balancer ring.
Thanks, going to give this a shot. Assuming I can use the same method for setting 5* increments? I think I saw a post that stated you make have bigger timing advance buttons than what is available from MSD?
Yes, I do have bushings for an MSD distributor.
If you put them that close you best have a way to identify which mark is which. With 15* spacings, it's only two extra lines and you can get any number up to 40*.
I have 10 and 14 degree. Figure out your initial, go from there.
I have seen way too many junk dial backs. I use a 40 year old Craftsman. If I tune your car, it will be with my light. Then I check it with yours and record any difference.
Almost any aftermarket dampener will be degreed. The OP can either get a timing tape or do the math.
Both are cheaper than an inaccurate dial back.
BTDC = before top dead center = ADVANCE
ATDC = after top dead center = RETARDED
You want the stock TDC balancer mark ABOVE the zero mark on the timing cover if looking over the drivers fender. That is advanced and is the correct side.
As I mentioned with the hillbilly tape. If you mark the balancer as described. Set your TDC balancer mark with the 10 before top dead center mark on timing cover. Now... roll the newly scribed 15* mark even with the zero mark on the timing cover. Where did the original TDC balancer mark go? Closer to the timing cover zero mark or further away...
In the picture I posted, the bottom line is the original TDC mark, then the 15* and 30* marks. That is on the pass side. So if you roll the engine over to the timing cover mark location, the new marks will be BELOW the original TDC mark.
It works EXACTLY the same as a timing tape, except it NEVER falls off the balancer ring.
I was able to work on the timing tonight. I used the hillbilly tape approach, however in lieu of marking at 5* ATDC I marked at 10 to give me 20* advance at TDC mark. I have about 25* of timing in the car now and I think I can go more as there are no issues with starting but without driving the car hard to tell if that is enough or if I should go more. My concern is putting too much initial advance in it and then throw in mechanical advance I will be close to 40* at 30* initial and a 10* button. Appreciate all of the advice. With work schedule and pending rain may not be able to drive for a few days.