Engine/Transmission (1994 - 1998) Beginer ? about Cam and timing

[JHastings]

I am still trying to get the whole timing thing figured out by reading threads and all, but I wrote the guy I bought my truck from and he said that I have an Enterprise #47 cam in the pickup. How is this different than the stock cam? Does it help me or hinder me? And most of all, does it affect my timing? Seems like bumping up the timing helps out a lot of guys. Also, how can the timing slip? What is the best kit to get so I can check/reset my timing?

Thanks in advance

 

[JGheen]

Either Enterprise Engines or the guy you got the truck from can only answer the frist two questions. I have no idea what is different about that cam from a stocker, but I am sure Enterprise can explain it all to you.

As for a timing, the cam does not affect it, as it is the time when the fuel is injected into the cylinder and not when the valves open and close. You can set your injection timing anywhere regardless of cam type. The injection pump is driven off of the cam gear.

Timing can slip because the gear is torqued/pressed onto the tapered injection pump shaft and if the shaft is not very clean and free of oil it can slip back and retard timing. Make sure the injection pump shaft is clean and dry before reistalling the drive gear on the shaft.

The kit that I use for setting timing is the Snap-on kit part number SP500. I believe it is about $210, not worth it IMHO but you get what you pay for. Haven't seen the Miller kit but I am sure it is very similar.

Just keep doing a search on the 12v forum for timing adjustment and you'll find tons of reading on procedures and where to set it at.



Joe

 

[Todd T]

I use a dealer tool for timing so i couldnt speak of the others out there.



like above the pump gear is press fit onto a tappered shaft, you have to have the timing kit and a gear puller (if not supplied in kit) to even start to think of timing it yourself you should also have a barring tool.



The thing to remember about timing is you have to pay Paul to rob from Peter. That means if you advance timing, you give up some bottom end, if you retard it, you pick the bottom end back up but lose top end power.



your sig doesnt mention what turbo you have? that can play into where you want your timing set. also your driving conditions and habits.