old_man
NAXJA Forum User
- Location
- Loveland, Colorado
The Renix high altitude CPS has the sensor moved over about .2" IIRC.
adjusting timing
- Thread starter fabjunkie
- Start date
- Location
- Southern Maryland
Kastein offered to calculate the distance for each degree of rotation using his spare AW4. Guess he hasn't gotten to it yet though.
- Location
- Rainy side of Washington
Yeah... sorry about that. Every time I walk by it (sitting on my back porch) I think "crap, I owe some measurements off that" but have something I absolutely have to get done. Had to get my calipers out for some stuff I did on the WJ booster swap last night though, so I'll see if I can get to it tonight before I finish that swap.
As for being an electronics guru... not really. I only know stuff about the XJ electronics I've already looked at, the CPS is an entirely new area for me.
As for being an electronics guru... not really. I only know stuff about the XJ electronics I've already looked at, the CPS is an entirely new area for me.
well, I made an adjustable bracket for the stock CPS, mocked it up last night it worked out pretty good! Got the final one done today...
I made it so I can use the stock CPS after cutting the mounting bracket off. It mounts in the stock position and you can slide the sensor where you want then tighten it down.
I'll let you guys know how I make out when I put it on this evening..
I made it so I can use the stock CPS after cutting the mounting bracket off. It mounts in the stock position and you can slide the sensor where you want then tighten it down.
I'll let you guys know how I make out when I put it on this evening..
- Location
- Southern Maryland
fabjunkie have you already done the math? Measure from the very center of the shaft to the CPS mounting plane to get the monitoring radius, then calculate the circumference with C=(R*2)*3.14. Then divide C by 360 to find the distance for each degree of rotation around the monitoring plane.
hey there, no I didn't do any math to it, I just made the slots able to adj the CPS as far either way as it is able to in the hole.
I'm gonna do it old school and move the sensor, then check with my timing light. I can't really see up on top of the bellhousing very well even if I did mark it.
I'm gonna do it old school and move the sensor, then check with my timing light. I can't really see up on top of the bellhousing very well even if I did mark it.
winterbeater
NAXJA Forum User
- Location
- Royal Oak, Michigan
And you do know that you have to very carefully maintain the end gap to the flexplate or it can bust the CKP (CPS).
nmcommando
NAXJA Forum User
- Location
- Oklahoma
winterbeater
NAXJA Forum User
- Location
- Royal Oak, Michigan
You aligned the rotor to the distributor towers better so that the spark could easier jump the gap between the rotor and cap towers. The spark still happened at the same time.
lsc910
NAXJA Forum User
- Location
- New Jersey
fabjunkie I was wondering if you had any pics of you brkt , for the adjustment
nmcommando
NAXJA Forum User
- Location
- Oklahoma
Ok thank you now i know.
Ok Fellas, the test results are in and all I can say is HOLY CRAP!!!
What a difference a few degrees of timing makes! It woke my truck up like night and day.
With my sensor in the middle of the slot, (approx stock) I had static advance of 8-9 degrees at idle, with the sensor advanced as far as it would go to the right, I was able to put in about 13 degrees.. let me tell you, my motor loves it, and no sign of pinging or knock.
I'll try to load a photo.. If there is enough interest I can make em in bulk.
What a difference a few degrees of timing makes! It woke my truck up like night and day.
With my sensor in the middle of the slot, (approx stock) I had static advance of 8-9 degrees at idle, with the sensor advanced as far as it would go to the right, I was able to put in about 13 degrees.. let me tell you, my motor loves it, and no sign of pinging or knock.
I'll try to load a photo.. If there is enough interest I can make em in bulk.
winterbeater
NAXJA Forum User
- Location
- Royal Oak, Michigan
That bracket looks pretty good. First thread I've seen where anybody did this.
Talyn
NAXJA Forum User
- Location
- Radford, Communistwealth of Virginia
I've moved the sensor before just by opening up the holes, but it wouldn't go as far as that one can. The main bracket looks easy enough to make... however, the part that is holding the sensor, is that something that you found or did you fab that too?
wolfpackjeeper
NAXJA Forum User
- Location
- 500' and 500KCAS, RAF lakenheath
for a good price I would take one for sure. I have felt like I needed a bit of advance on the timing on my stroker for a while.
- Location
- Southern Maryland
I'm down for one as well. I even have an old CKS to cut up and test with.
wolfpackjeeper
NAXJA Forum User
- Location
- 500' and 500KCAS, RAF lakenheath
props for realizing that we actually have rules. After I posted I was afraid I may have set you up to walk into an infraction.
You could also post these up in the national for sale and your local chapter since you are a paying member.
You could also post these up in the national for sale and your local chapter since you are a paying member.
I'll tell you what, this forum and all you guys have been a HUGE help with my xj project, so the last thing I want to do is get in hot water over something like this.. SO whatever I need to do to keep on the up and up, I'll gladly stick to the letter.
