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Wait a damn second.

You are using a z6 disty on the Y8 head?


Find a d15b7 disty to check out.


There's your problem!!
 

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1994 turbo hatch
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Discussion Starter · #22 ·
Wait a damn second.

You are using a z6 disty on the Y8 head?


Find a d15b7 disty to check out.


There's your problem!!
im using a B7 dizzy. that’s the problem. the slot on the cam is different
 

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1994 turbo hatch
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Discussion Starter · #23 ·
137997

i guess my drawing wasn’t good enough
Y8 on the left. Z6 on the right. the distributor slot is different.
don’t have a pic rn but the b7 is the same as the y8 and the zc is the same as the z6
 

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93 4d lx, z6,ported, port matched, compression bumped, balanced, manual swap
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And you think that the 5° difference between 1 dist drive slot and the next is causing a 25° ignition timing retard?
 

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1994 turbo hatch
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Discussion Starter · #25 ·
And you think that the 5° difference between 1 dist drive slot and the next is causing a 25° ignition timing retard?
well i haven’t measured it but i looks like 9.5 degrees (one tooth) which i believe would make it 19 degrees off on the crank
 

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With no bolts in the distributor at all, can you ever adjust things to get ignition timing to line up at the crank? I'm curious how far off the bolt holes are when you hit your mark.

Not uncommon for people to cut entire dist ears off, or grind out slotted holes further to hit their marks.
 

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1994 turbo hatch
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Discussion Starter · #27 ·
With no bolts in the distributor at all, can you ever adjust things to get ignition timing to line up at the crank? I'm curious how far off the bolt holes are when you hit your mark.

Not uncommon for people to cut entire dist ears off, or grind out slotted holes further to hit their marks.
i have not tried that yet. i hope to avoid that because i want to keep the engine bay neat, and there is also the cyp issue with the b7 dizzy. i will definitely try that though
 

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BATSLOMAN GIVES NO FUCKS.
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isnt 1 tooth 4.5* of timing?
 

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well, it sounds more and more like it is off one tooth at the camgear.

Again, take the cap off the distributor, set the timing belt like I mentioned, one tooth over counterclockwise, and retime the engine.
 

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1994 turbo hatch
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Discussion Starter · #31 ·
well, it sounds more and more like it is off one tooth at the camgear.

Again, take the cap off the distributor, set the timing belt like I mentioned, one tooth over counterclockwise, and retime the engine.
so do you think my keyway could be off? it is an aftermarket cam so that is possible i guess
 

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It is certainly possible.

Got an oem d16z6 or d16y8 cam to swap in?
 

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For now, I would get your cam zero'd out as much as possible and verify it with a crank wheel. Make your marks when the cyl#1 valves are shut, as Im sure there is some overlap, find true center of the cam, and go from there.

You can print out a wheel and glue it to a piece of cardboard, and make your own as well.
 

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1994 turbo hatch
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Discussion Starter · #34 ·
It is certainly possible.

Got an oem d16z6 or d16y8 cam to swap in?
yeah i’ve got a y8 cam. but i would like to use this one because it is a turbo cam. i’m sure i would work fine with the y8.
 

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The whole point is trouble shooting.

If the distributor gets significantly closer to where it is suppoed to be, then you know your custom cam is in need of a simple weld filler and recut of the disty groove
 

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1994 turbo hatch
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Discussion Starter · #36 ·
update: i was able to talk to the guy that bought the cam originally. he said the keyway is about 12* retarded. i jumped the gear 1 tooth forward and retarded it 2* (already advanced 4.75 because it’s a y8 gear). runs great.
now all that’s left is to get a wideband o2 sensor :)
 

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93 4d lx, z6,ported, port matched, compression bumped, balanced, manual swap
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Figured it was something to do with the cam timing, glad you got it sorted🍻 be nice to have another D on the road, showing the world what can be accomplished through compromise.
 

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Goes back to the basics (even in my V8 days) of degreeing in the cam. Even the manufacturer specs can be off changing the baseline setting.

Sorry but due to ADHD/Autisism/etc it is something I can visualize in my head, but hard to type out. Esp. when I can think in SBC/SBF and try to explain in SOHC Honda....which they really aren't much different.
 
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