Rollmaster gear and timing chain
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the gears are made by romac in australia
the katech single is probably better, but doesn't have as much adjustability as the rollmaster
it really depends on your spring pressure and rpm range
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I ran a Rollmaster double roller on my heads & cam package for the 99 TA for 125,000 + miles.
Usually the typical factory single chain seems to stretch a little more over a long time and many 10,000's of miles than 2x rollers. Very slowly the cam timing can change slightly. My RS clearly changed cam timing by a couple of degrees after 200,000 miles with a factory single. Put a new 2x roller on the engine ran differently. The 2x roller the engine ran the same at 389,500 miles as it did when the 2x was new.
Lots of high rpm can stretch a timing chain similar to long slow accumulated miles.
When engine harmonics are bad due to a faulty dampener any timing chain is at risk of breaking. Back in the day several engines with ASP under drive pulleys snapped C5R chains on road courses. If the harmonics are good like with an ATI dampener the chain and engine will tend to live longer.
My 91 RS's LS1 383 also has a 2x roller. Based on the advice of my engine builder, we picked the Comp Cams 2x roller set up for this engine. This engine was also built to handle 7,000+ rpm so nervous me want a 2x roller. When we did the Rollermaster on the 99 TA there were some issues degreeing in the cam. One of the gears had to be drilled & pinned for correct cam timing despite being "adjustable" if I recall correctly for the Rollmaster. The RM was far more annoying to install and fiddle with than the Comp Cams 2x roller. Both required some clearancing to get best fit with timing cover.
On the 416 in the TA today, I talked about 2x rollers with Norris Motorsports and based on how I drive and use the car, we decided a factory LS2 set up would be suitable. The motor sees 6,500 rpm and factory chain is good enough. I eventually want to go low lash solid roller etc and a new C5R chain will probably go on at that time.
With all that said the Rollmaster from 15 years ago proved a quality item and held up well.
Last edited by 99 Black Bird T/A; Jul 24, 2018 at 05:12 PM.
- Engines with piston oil cooling jets,
- Radiused crank bearings
- Some aftermarket lifters
- Increased build clearances
I like the slightly higher pressure oil pumps like Katech blueprinted & ported stock pump or Mellings high pressure one on the typical LS or SBC engine. In most cases the high volume pump isn't desirable.







