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Discussion Starter · #1 ·
I'm running a PG7 ecu and V-ACF for vtec. Right now I have my cam gear set at 4 degrees advanced. It pulls strong from 3.5k -> 5.5k but after that vtec kicks and it seems to lag a bit. I'm still planning on either getting the fpr from an EG or just getting an adjustable one. My question is, when vtec kicks does it advance or retard the timing? I've seen some people say they're running anywhere from 2degrees to 4degrees retarded for this setup. Where should I set my cam gear?

I've searched but have yet to find a solid answer.

This is my setup:
stock d16a6 bottom block
stock d16y8 head with AEM Adjustable Cam gear
stock d16a6 IM
stock d16a6 header/exhaust (i will try gutting out cat, might be clogged)
PG7 ecu, I also have PM6 and PR4 I can use

Could some of you post where you guys are setting your cam gears to with a similar setup?
 

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Discussion Starter · #2 ·
After some more searching this is what I found. I know for a fact that I have the y8 head but I think I have the z6 adj. cam gear which is this one.


The Y8 cam gear should look like this

notice how the grove for the key is off by around 4 degrees

This would lead me to believe that if I was using a y8 bottom end I would have to set the cam gear to around 4 degree advanced to get the stock timing for d16y8.

In my case, since I have the d16a6 bottom end, Should I leave the markings at 0? or what? thanks
 

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In my case, since I have the d16a6 bottom end, Should I leave the markings at 0? or what? thanks
You'll need to start with the 4 degree difference when tuning since you're using a Z6 cam gear. They are otherwise the same. So, you will only have 6 degrees to work with advancing.

I recommend that you try advancing it 2-4 degrees more and see if you like it. It will take from your bottom end power, but you may like the additional up top.

One thing you can do is knock it forward a tooth if you wanted it advanced more but I think that would be overkill. :)

Post how you like it!
 

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Discussion Starter · #4 ·
You'll need to start with the 4 degree difference when tuning since you're using a Z6 cam gear. They are otherwise the same. So, you will only have 6 degrees to work with advancing.

I recommend that you try advancing it 2-4 degrees more and see if you like it. It will take from your bottom end power, but you may like the additional up top.

One thing you can do is knock it forward a tooth if you wanted it advanced more but I think that would be overkill. :)

Post how you like it!
Well in that case, it should be close to stock setting as of right now. Would advancing be harmfull in vtec mode? Wouldn't advancing add to bottom end and take from top end? I was going to try retarding it. I'm just curious because this is what I have read.
 

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Well in that case, it should be close to stock setting as of right now. Would advancing be harmfull in vtec mode? Wouldn't advancing add to bottom end and take from top end? I was going to try retarding it. I'm just curious because this is what I have read.
My bad I meant to say retard it :shoot: It's set to stock right now so play around 2-3 degrees plus or minus and see how you like it. Don't be afraid to mess around. Make sure to post how you like it too.

Also I would make sure your iginition timing is right on before you try it.
 

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Discussion Starter · #6 ·
My bad I meant to say retard it :shoot: It's set to stock right now so play around 2-3 degrees plus or minus and see how you like it. Don't be afraid to mess around. Make sure to post how you like it too.

Also I would make sure your iginition timing is right on before you try it.
Thanks, I will try retarding it 2 degrees or even 4 to see if it runs better.
 

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Discussion Starter · #7 ·
Well I tried moving it back to the zero. Loss on the low end but I did not feel any gain on the top end. Perhaps I will try this again this Saturday at the tracks. I like the low end power at 4 degrees advanced though. Maybe I will try gutting out my Cat
 

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Discussion Starter · #8 ·
Those lines represent 1 degree on the cam right? When advancing 4 degrees do I move it 2 lines on the cam or 4?
 

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Those lines represent 1 degree on the cam right? When advancing 4 degrees do I move it 2 lines on the cam or 4?
See where it says "each mark 1* crank" on one gear and 2* each crank on the other? that means that for each degree you move it one or two lines.
 

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Discussion Starter · #10 ·
Well on mine it says, each mark = 2 degrees on the crank so I would move it 2 and a half lines for 4.5 degrees?
 
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