Another tuning issue

[CREEP]

Hey all. Recently i've been borrowing a friends timing gun. It's been off everytime, which I think is a result of me not having a nut on the back bolt of the CAS. Seemed to fall out of of the right timing w/in a couple weeks. I've finally decided to bite it and buy a timing light, and I checked it again...holy crap was it off! It was floating I'd say around 2 or 3* AFTER TDC. Funny thing is I had it tuned in and it felt pretty strong. My issue now, after i've set it to the correct 5* BTDC is a shitton of knock has come about right when it spools, forcing me to get out of the throttle to avoid what seems like total devestation. I am running FIC 650's on the stock 14b at ~19psi. Only thing I can really go by now is my o2's because I can't get close to a full pull to see what the egt's are. o2's are ~.82-84 which from experience is pretty fat, I have a 90 model. I dropped in a gallon of 110 in an effort to kill the knock if it was lean. It hasn't seemed to do anything. However I don't feel safe leaning out my AFC to the tune of -30's across, which is where I feel it would have to be right now if that were the case. AFC is AROUND -20's right now. I'm not sure if you guys can help me here but I thought i'd give it a shot. If you need any more info lemme know!

 

[2bar]

I have 550's with a 16g running 18 psi and my high settings are -22 at 2000 and still -20 at about 4000. If your running 650's you need to lean it out some more. You are probly over fueling the car causing it to knock when you first step into it.

 

[CREEP]

You are probably right. It's just I guess these FIC's flow a bit better than i thought they would. The timing was WAAY advanced afterall, but before he had the new setup, there was an almost identically modded car here w/ denso 660's and he was in the high -10's, low -20's. I'm gonna slowly take away some fuel and see what happens.

 

[CREEP]

Well, no dice damnit! Guess i'll triple check the timing and plug gaps.

 

[4g63tsiawd]

Not to insult you but how are you checking your timing. When you say its floating what does that mean.

 

[CREEP]

With an inductive timing light.

 

[CREEP]

Could my newly acquired timing light be homosexual? It's the cheapest one I could find at Sears. I've previously set the timing to 5*BTDC w/ a Craftsman when I had my 450's in and it ran great. I have advance it to the point of being immesearable now for it to run right. This would be a sweet, easy fix, if so.....?

 

[CREEP]

Perhaps something in my motor didn't like me switching from 5 to 10w30? Only thing with that is it only knocks bad at WOT.

Any ideas..?