What is the conflict between a double roller timing chain and the CPS?
What does the CPS read off of exactly?
Does the double roller chain hit the sensor?
Can a spacer be fabricated to allow proper clearance?

I need to retain my OBD2 ECM in stock form for inspection, no programming period. I plan to convert to OBD1 for programming and scanning.
Any ideas please reply.

 

The CPS sensor is built into the timing chain cover, it's on the bottom left hand side of it. That sensor goes through the cover and reads a reluctor ring that's mounted on the crank in front of the crank timing gear. The Cloyes chain set is too thick for that reluctor ring to be used. I removed the ring and left the sensor there, well you have to leave the sensor there or you'd have a hole in the timing cover. It just doesn't read anything now. I got an SES for that sensor after startup but I have since had it programmed out. Bryan at PCMforless told me that my county/state inspection allows for up to two emmissions related "problems" before they will fail it. I deleted that, EGR and AIR so I may end up reinstalling either the EGR or AIR if I fail this next time just to get by. Not sure about the laws for your county or state but he may be able to tell you if you ask him. And without that reluctor ring there I don't know of any way to make that sensor work.

Gregg

 

I see. So there is a reluctor ring separate from the original crank gear but, it simply wont fit with a thicker crank gear like the double roller.
Does that mean the reluctor ring would hit the inside of the timing cover?
Any guess (if you remember) the difference in thickness? and how thick is that reluctor ring?

(Idea: could the inside of the timing cover be machined to accept the thicker gear and the reluctor ring?)

 

Yes, the ring is seperate, it goes on after the crank timing gear. The ring is maybe 1/4 - 1/2" wide I'd say. I think the problem would be that the sensor is now blocked by the thicker chain and gears, which was maybe 25% or so wider than the stock set. I didn't try fitting the ring back on to see if it would work because I was told that it just wouldn't. I really wouldn't bother messing with it if you need to stick with the CPS, I would sooner go with the LT4 ED chain. I'm sure it's just as strong if not stronger, it's just more expensive at $200 or so compared to the $80 Cloyes

Gregg

 

Thats just it, $242 shipped from gmpartsdirct is the cheapest I've found (and thats cheap). The cloyes may be $80 (edit: $68 @ jegs) but I bet someone would ship it for less than $10 if not free.

 

I was thinking $$$ too when I was looking for a new set. Since I wanted to go with an electric wp anyway and I found the CPS was only used for emmissions I decided on the Cloyes. The best price I found on the ED set was from Jason Cromer
He sells it for $199.00 plus shipping of probably $5 or so.

 

Anybody else ever look into this a little closer?