More "live and learn" LS moments...

[Steve1968LS2]

Been having starting problems with the new engine and getting "cam sensor" error code

Worked with Scott Brown today on it and foumd that the connector was worn an not giving a cam position signal (so the computer just guesses)

Fixed that and was still getting a code... but it started more often

My LS2 is an early using an E40 computer.. as such its a 24x deal. When we built the 454 Comp accidentally sent us a newer single bolt cam. To get around this we used an LS3 cover and gear. I was focused on the 24x part that we didnt think of the 1x versus 4x cam sprocket deal.

Now mu com is looking for one pulse and getting 4.. So from a cam sensor perspective the computer is seeing 4000 rpm when the engine is ideling at 1000 rpm ... luckily the rev limiter and most functions read off of the crank sensor.. still, we think its hurting performance somehow. Just not sure how.

So, will the 1x cam srpocket even bolt to the single bolt cam? Can we "make" it work? I need to grab some parts and find out

The best fix would be to program the computer to recognize the 4x sprocket in the car.. dont know if that is possible.

Anyways, mystery solved an lesson learned.. make sure ALL of your parts match up.. lo

What I have:
http://i45.tinypic.com/35871u1.jpg

Whst I need:
http://i48.tinypic.com/or2sl3.jpg

[Pantera EFI]

My ECU-882C-x needs only to "see" one pulse after the last cylinder/before the first.
Thus the 1/2 moon target works.

Hall sensors "see" high and low.

I have used the 4 Post target wheel AFTER modification to produce that 1/2 Moon wave form.

One method, in your case, would be to ADD/REMOVE metal on the face of your crankshaft sprocket.

Lance

[Steve1968LS2]

My ECU-882C-x needs only to "see" one pulse after the last cylinder/before the first.
Thus the 1/2 moon target works.

Hall sensors "see" high and low.

I have used the 4 Post target wheel AFTER modification to produce that 1/2 Moon wave form.

One method, in your case, would be to ADD/REMOVE metal on the face of your crankshaft sprocket.

Lance

I htought of that... mod the 4x by addind material between the two large moons and removing the two smaller bumps.

But, dont you need to make sure it stays balanced or is that not an issue since its small?

[GregWeld]

Steve --

Just thinking about this "balance" question... Not sure how it could possibly be balanced with all that metal on one side... and if you added metal (mallory?) to balance it - then you'd create another signal generator?

It's small diameter - and turns at half the engine speed... balance might not be an issue. I think I'd be calling Tom Nelson or someone like that to see if they have an opinion.

[WSSix]

The cam sprokets are the same diameter and tooth count right? If so, just get the one you need and drill and machine as necessary to use a single bolt. I'm betting the metals are the same even. Looking att he pics of what you have and what you need, it honestly doesn't look to be that big of a deal to machine a three bolt to work on the single bolt cam.



I see your single bolt sproket is pinned now, is that stock? I'm so behind on the newest LSx stuff that I'm virtually lost. Gen3 and early Gen4 and I'm good.

[GregWeld]

Hey! Don't try to steal my solution!
:rofl: :rofl:

[WSSix]

lol you said modify the existing one bolt sproket. I say modify a three bolt sproket. I'm betting either way would work really.

We'll just chalk it up to great minds thinking alike.:D :yes: