Anthony Boni
5+ Year Contributor
- 213
- 23
- May 13, 2018
-
Wrightstown,
New_Jersey
Alright guys I need help!!
I have a G4CS block with a 4G63 head. I’m using a 4g64 timing belt, stock 4g63 cam gears, and OEM 4g63 timing components. Currently I have the intake and exhaust cams retarded half a tooth as I’ve seen on other write ups. Car idles and drives fine. I set my base timing to 5° BTDC. I’m running into an issue for when I get into boost. I get knock at only 13 pounds/4K RPM. A lot of knock. Like 5 degrees retarded. I was told by a very reputable source that using stock cam gears retarded is NOT correct. So I went ahead and ordered some AEM True time adjustable gears. My first question; could cam timing being a few degrees off be what is causing my knock?
Follow up question: I also have an FP1 intake and an fp2 exhaust cam. What I’m trying to figure out is, do I line up the adjustable cam gears like normal, retard 3.5* on both the intake and exhaust because of the extra 6mm deck height, then time the cams according to their cam cards from that new baseline?
I could REALLY use some input on this because I’m seriously getting drained. This car was terrible when I first bought it. I’ve done too much to be stumped now. Thanks..
I have a G4CS block with a 4G63 head. I’m using a 4g64 timing belt, stock 4g63 cam gears, and OEM 4g63 timing components. Currently I have the intake and exhaust cams retarded half a tooth as I’ve seen on other write ups. Car idles and drives fine. I set my base timing to 5° BTDC. I’m running into an issue for when I get into boost. I get knock at only 13 pounds/4K RPM. A lot of knock. Like 5 degrees retarded. I was told by a very reputable source that using stock cam gears retarded is NOT correct. So I went ahead and ordered some AEM True time adjustable gears. My first question; could cam timing being a few degrees off be what is causing my knock?
Follow up question: I also have an FP1 intake and an fp2 exhaust cam. What I’m trying to figure out is, do I line up the adjustable cam gears like normal, retard 3.5* on both the intake and exhaust because of the extra 6mm deck height, then time the cams according to their cam cards from that new baseline?
I could REALLY use some input on this because I’m seriously getting drained. This car was terrible when I first bought it. I’ve done too much to be stumped now. Thanks..