Advancing the cam timing question

[Ross S]

I put a new timing belt on my RB30 yesterday and after reading lots about advancing cam timing I decided to advance. I advanced the cam dot by 2 grooves, that is, I turned the cam CLOCKWISE so that the distance between the two timing dots was only 51 belt grooves where the book suggests 53. The belt actually has yellow lines on it that are 53 grooves apart.

I got it all back together and running, but it has no power and it has a very loud throaty sound coming from it.

I tried advancing the ignition timing and it didn't make any difference.

Did I do something wrong, why did power reduce instead of increase. I have seen a post that says the cam should be turned ANTICLOCKWISE to advance the timing, this doesn't make sense to me.

I've since pulled it all down again and advanced it one groove instead of two, I haven't put it back together yet, just thought I'd check with someone who's done it before I put it all back together and have to do it a third time.

[Not_An_Abba_Fan]

Advancing the cam timing means that you are opening the valves sooner than they are supposed to. Turning the cam anticlockwise will achieve this. What you are doing is actually retarding the cam by turning it forwards in its direction of rotation. This makes the valves open later and reduces power. Advancing timing on the cam means to turn the cam or distributor against its direction of rotation so it does what it has to do before it would normally do it. If that makes sense.

[BigDaz]

makes sence to me. Might have to try that

[Ross S]

I stuffed up. Anticlockwise is the correct way, third times a charm. I have to say, I'm not a fan. The car's louder and if anything, I'd say there's less power. Now that I've done it three times in two days, I've got it down to an easy hour and a half job.

So unless someone can tell me why I haven't gotten the results promised, I'm going back to the standard settings.

I had to advance the ignition timing as far as is possible to get it even to run right. Do I need an after market ECU with advanced cam timing or will the standard ECU do it.

Unless someone can tell me how to fix this, it has been the biggest waste of time I've ever endured.

[gungazza]

I stuffed up. Anticlockwise is the correct way, third times a charm. I have to say, I'm not a fan. The car's louder and if anything, I'd say there's less power. Now that I've done it three times in two days, I've got it down to an easy hour and a half job.

So unless someone can tell me why I haven't gotten the results promised, I'm going back to the standard settings.

I had to advance the ignition timing as far as is possible to get it even to run right. Do I need an after market ECU with advanced cam timing or will the standard ECU do it.

Unless someone can tell me how to fix this, it has been the biggest waste of time I've ever endured.

should have left it standard ,no stuffing around then ,i recon mine goes fast enough as it is , if you want it faster buy a better car

[bangers]

one tooth anticlockwise would be definately enough.

[Not_An_Abba_Fan]

People advance the cam timing to get rid of the hesitation that the VL had under acceleration. Other than that it doesn't do much unless you put more fuel in.

[Post Vintage]

one tooth anticlockwise would be definately enough.

I had an r31 for years... we always went one tooth.

[mag]

I put a new timing belt on my RB30 yesterday and after reading lots about advancing cam timing I decided to advance. I advanced the cam dot by 2 grooves, that is, I turned the cam CLOCKWISE so that the distance between the two timing dots was only 51 belt grooves where the book suggests 53. The belt actually has yellow lines on it that are 53 grooves apart.

I got it all back together and running, but it has no power and it has a very loud throaty sound coming from it.

I tried advancing the ignition timing and it didn't make any difference.

Did I do something wrong, why did power reduce instead of increase. I have seen a post that says the cam should be turned ANTICLOCKWISE to advance the timing, this doesn't make sense to me.

I've since pulled it all down again and advanced it one groove instead of two, I haven't put it back together yet, just thought I'd check with someone who's done it before I put it all back together and have to do it a third time.

Have a look here..- Getting this 'advanced cam' yadda right!

Everything to know about VLs (open.. post your links here)

[bangers]

I had an r31 for years... we always went one tooth.

from what i heard the r31 was already one tooth advanced over the vl, not confirmed though.

[snake_VL]

i did some research a while back and thats a myth bangers, both workshop manuals say 53 for both vl and skyline

[mag]

i did some research a while back and thats a myth bangers, both workshop manuals say 53 for both vl and skyline

That makes sense to me

[ucwepn]

Are you running premium unleaded? because if your not it will make no difference and can even cause detonation advancing it with reg unleaded.

[gslrallysport]

Are you running premium unleaded? because if your not it will make no difference and can even cause detonation advancing it with reg unleaded.

Are you talking about ignition timing or cam timing? Fuel has nil effect on the later...

[mag]

Are you talking about ignition timing or cam timing? Fuel has nil effect on the later...

Alot of people get the 2 confused, they ARE 2 totally different things