That HEX drive in the end of the cam shifted on mine when the cam sensor fucked off, and once that happens you need a new cam. There is a prob with some cams, don't know if it is a certain batch and/or build date or what.

 

The LSJ doesn't have the compression sense system that the other ecotec's have so other than a mis alignment of the cam sensor how does the enginement management system know about staggered exhaust lobes? It's my understand that the typical cam related CEL is caused by compression sense system?

 

thats right. the only readout for the cam position pickup is at the camshaft sensor. you just dial that in to relation of the crank pulley.

 

That's what I'm getting at Zin. The lobe profile (staggered or otherwise) will have nothing to do with the DTC IMO. The cam sensor signal must coincide with specific crank sensor trigger transitions (within the tolerance built into the diagnostic)
It doesnt care what the lobe is doing!- I mean at TDC compression both valves are CLOSED anyways!!

IMO either the cam sensor itself was not installed (timed) correctly when the cams were installed
OR
somehow the exhaust cam was ground so that the flats on the hex drive for the cam sensor were not correctly orientated when engine is at #4 TDC compression
Maybe you can slot the CMP sensor housing mounts enough be able to bring it back into correct time??
Wop

 

WopOnTour
Well I asked him and let him tell me to witch TDC he timed and he said that he timed it to the #4 TDC, but I was wondering today, what would be the difference timing it to the #1 or #4, aren't they in the same position anyways?

and could the cams have caused the premature failure of my Cat., or I'm I one of the lucky few to just have one go on them?

 

If you look back I said #4 at TDC COMPRESSION. Of course both cylinders are at TDC but only one is on compresion each cycle.
Cant say about your cat failure, are you overly rich?? Doubtful it's the cams- think you were just "lucky"
How do they perform otherwise?? DId you do a pre/post dyno??
WOT

 

there a definitely a difference felt from the high-mid range right to the point where the bypass valve kicks in.

the cams are creating more boost in the engine and at about 5600rpm the by-pass valve kicks in at about 15psi and dumps the boost back to stock levels.

JBP Stage 2 Cams Dyno

now for curiosity I ran the boost by-pass mod, and the car pulls hard to it's regular red line, and I reach about 17psi. I don't do this regularly, cause I don't know if I'm leaning out, and I don't want to cause any problems. Right know JBP is working on a Manual boost controller, so that I can clamp the boost at 15, and keep it there to red line.

you can see in the dyno right where the bypass valve opens up and spoils all the fun. I only wish I though of the by-pass mod when I was on the dyno.

 

Turbotech, are the 2.2L cams good for the 2.4L? And anyone know where I can get valve springs that'll handle up to an 8k rev limit? I want a little more than stock rev limit.