if my cam, lifters and rockers are rollers.. doesent that make it a full roller motor?

Well if your cam is a roller then your lifters had BETTER be roller. Is your timing chain roller? If not then you are 3/4 roller. :D

that i dont know, i am going to pull the cover this weekend and see, will a roller timing chain make any kind of noise like a real quiet gear drive?i had thought this car had a quiet gear drive but im not sure, i bought it like it is and only got info on the cam, heads and block internals. how will i know.. i looked at pics and cant see a difference in the pics?

I'm sorry I was just kidding about the 3/4 roller thing! I have never actually heard the term "full roller" before. I think it's kind of like the "3/4 race cam" thing. IMO a motor either has a roller valve train or it doesnt, ther isn't really a term for it. Please dont pull your timing cover off just to see the timing chain. smile.gif
Steve

Hey BBelky. Here in oregon if someone says they have a roller motor, it is assumed cam, lifters, rockers. I personally never considered the chain. Full roller on the rockers. Just an opinion.

You got a roller motor.

FWIW - The GM crate ZZ4, FB385 and HT383 come with a hyd roller cam with ball pivot rockers. Must be a half roller, eh?

lol.. well its gotta come off anyway, i have a leaky water pump thats getting replaced and i want to know if its just a quiet gear drive.. heres another question ill throw in instead of making a new topic, anyone ever used the electric drive systems for your water pump, i was just checking them out in jegs.. i mean i have a beefy alternator and duel batterys for a reason right.. why not use some of that extra juice on something other than a cd player and amp. i just wondered if thats just an easy way out instead of getting a standard electric water pump.

i take a ribbing on my 383 cause it has a hydro roller in it. people ask me when am i gona put a REAL roller in it. i guess i got a roller wanabe. Dave

im still in the "semi clueless" stage about valvetrain set ups, i know the advantage to a roller set up is like 50% less friction which in turn releases horsepower, same way having skinny tires on the front reduces drag, but i dont know the difference for sure on a hydraulic, a hydraulic roller, a solid roller, a mechanical, etc.. and to confuse me even more i was looking at a cam in summit today that is supposed to reverse the #4 and #7 cylinders for more power... huh??? how does that work? i would think you would have to swap the plug wires to if you wanted them to fire oppisit.. and how the heck would a cam control the firing order of the piston anyway.. :confused: :confused: graemlins/clonk.gif

Mechanical roller cams are great for lower friction, which then allows more radical lobe profiles, but my personal opinion is that they don't last very well in a street motor. If you motor is mostly a strip motor, and you need every possible advantage, great, but if it's street motor, and you're not in need of the most righteous profile possible, I think you'd be much better off with a flat tappet or hydraulic cam.

A full roller also has roller cam bearings.

BBelky, the reason you want to reverse the number 4 and 7 firing order is it keeps 5 and 7 from cross firing. Number 5 and 7 fire in order and are adjoining cylinders, so reversing those keeps the cylinders from firing on top of each other. The pistons still move in they same order, the cam just changes which valves open at what time. Basically a modified firing order cam just moves the lobes of the cam around a bit, you still have to switch your plug wires around to accomadate firing those cylinders at the appropriate time, basically another way to get every single last horsepower out of an engine. A solid cam is basically what it says, it uses solid lifters, a hydraulic cam uses lifters that pump up with oil and absorb the shock of the valve train. With a roller you can run a more radical profile on the street, but if you go solid you will spend time setting valve lash, with a hydraulic lifter you rarely have to set lash do to the lifter pumping up and taking up the slack. Hope I helped some and didn't just confuse you more :D By the way pony hunter I have never heard of roller cam bearings? How is there room to fit a roller bearing in the holes the cam bearings fit in, hope I didn't screw up when I built mine. Maybe somebody can explain those. Jeff

Originally posted by sheetmetal:
i take a ribbing on my 383 cause it has a hydro roller in it. people ask me when am i gona put a REAL roller in it. i guess i got a roller wanabe. Dave Dave, who's giving you a hard time about the wimp-roller, err...hydro roller? :rolleyes:

In regards to the 4/7 swap cams .... its not due to the cylinders crossfiring. If that was the case, then why wouldnt 2 & 4 crossfire w/ the swap ?

It has to do with the intake charge of the front cylinders.

Hey Jeff, I found a nice article on them. My stepbrother just spent about 250 bones for the machine work and about $500 for the custom cam that he needs to use them.
http://www.hotrod.com/techarticles/69618/index.html