Timing

[Leo92335]

Hey Mike and banzai thanks for your help, I'm doing a compression test and the spark plugs that I pulled out cylinder #1 looks clean #2 heavy smoked #3 a little smoked #4 very clean, what does it tell me with the smoked sparkplugs?

[datzenmike]

#3 looks perfect

#2 maybe burning a little oil

 

#1 and #4 look very lean. They shouldn't be white at all but tan like #3As the carb feeds them all equally they should all get the same mixture.

 

How many miles on them???

 

 

I'd be curious what the compression numbers are on 1 and 4

[Leo92335]

Thanks Mike, the engine suppose to be "rebuilt ",,,,,they have about 800 miles on them and my readings on about 5 cranks were #1 -140 #2-152 #3-150 #4-150 

[banzai510(hainz)]

I would put plugs 2 &3   in 1 &4 spot when you get the new coil and run it for awhile then see what happens. Otherwise just live with it. My yellow 510 with 44s they were BLACK but car seemed fine and ran it 17 years that way.till I sold it and still running

 

I think L16 were around 140 anyways. really the other 3 cylinder excedded expectation

[datzenmike]

Side drafts have a barrel for each cylinder one or more could be richer or leaner than the other cylinders. The Hitachi down draft feeds the same mixture to all cylinders. So what would cause 1 and 4 to be so white indicating a severe lean mixture????? Looks like 2 and 3 are doing all the work.

[Leo92335]

Thanks guys, well the engine only struggles a little in the mornings to start but after it starts its great for the rest of the day it even starts after only a couple of engine cranks with no gas pedal, it's faster than my Toyota matrix and engine seems strongs when I'm driving,, so I guess I can live with it like banzai said about his black spark plugs,,,thanks again fellas 

[Leo92335]

The idle its steady at 800 rpm so looks like all cylinders are firing 

[datzenmike]

how many miles on those plugs? any chance the 1 and 4 are a hotter heat range??? like BPR7ES?

[Leo92335]

I'll say about 500-600 miles and they are all the same NGK-R-BPR6EY all installed by CALIFORNIA DATSUN 

[Leo92335]

It's got an 11 on the bottom so bpr6ey-11

[datzenmike]

11 is 1.1mm or 0.044" a bit much unless you have an EI ignition. I think you do. If you have any ignition concerns reduce to 1mm or 0.040"

 

 Well if idles and runs good can't argue with that.

[Leo92335]

I have the gap at 30 so it should be 44 ?

[Leo92335]

I do have the same distributor you showed me the El ignition 

[datzenmike]

12 minutes ago, Leo92335 said:

I have the gap at 30 so it should be 44 ?

 

Split the difference make it 0.035"-0.040". The EI has a stronger more energetic spark that the points never did. Points are usually 0.032" and high output ignitions more like 0.040". I think some GM engines are 0.060"

[Leo92335]

I just set it to 40 ,it starts good, I'll drive it tomorrow to see any difference and hopefully it's better with the coil that is on its way  ,thanks Mike 

[Leo92335]

3 hours ago, banzai510(hainz) said:

I would put plugs 2 &3   in 1 &4 spot when you get the new coil and run it for awhile then see what happens. Otherwise just live with it. My yellow 510 with 44s they were BLACK but car seemed fine and ran it 17 years that way.till I sold it and still running

 

I think L16 were around 140 anyways. really the other 3 cylinder excedded expectation

Thanks banzai that's good to hear

[datzenmike]

Wait, do you have a points coil and a ballast? If yes 0.040" may be too high till you get your EI coil in. It may miss fire under load.

[Leo92335]

Yes I do have the stock coil and ballast,I'll get the new coil tomorrow, thanks Mike 

[datzenmike]

Just checking. The new coil does not need the ballast.

[Leo92335]

Can I  bypass the ballast and the same cable from the ballast jump it to the same side of the coil?,,,,and then remove the ballast 

[datzenmike]

Yes I think so.

 

You want this... (ignore the coil)

 

[banzai510(hainz)]

10 hours ago, Leo92335 said:

Can I  bypass the ballast and the same cable from the ballast jump it to the same side of the coil?,,,,and then remove the ballast 

just make a wire same length as the ballast  pull the wires on the end of ballast and replace with the short wire!!!!!

 

 the B will go to the + side coil. so you might need to buy a male lug with 2 ends to go on the + side coil

C goes to minus side and you can remove the point wire and labol and tuck it out of the way.

[Leo92335]

Thanks banzai and Mike for your help, I just installed the new coil and I did notice a smoothness in the engine, the cable before ballast was long enough to reach the new coil so I just put everything the way it was with out the ballast and it turned on with out the ballast, yay,,thanks again fellas I'm sure good karma is on your way 

[Leo92335]

On 1/27/2021 at 11:26 AM, datzenmike said:

Does the distributor look exactly like this one???

 

Hey Mike in case I lost touch with you i would like the info of the distributor in case I need one on the future, where did you buy the distributor , what's the part number?

[datzenmike]

They all work the same but depending on year and vehicle, manual/ auto, state, etc there were differences in mechanical and vacuum advance.

 

A '79 200sx non California is..... 22100-W5801

 

 

There are at least 8 '79 EI 200sx distributors.