First I can't imagine why anyone would run a Pete jackson " dogbone" style gear drive.wesleyj said:I want to run a Pete Jackson gear drive and a mechanical fuel pump. I'm sure others have done this.
How did you attach the fuel pump eccentric to the timing gear? Did you use the 2 piece eccentric or a 1 piece off a 351w?
Not that I want to run one on the street, given I have a race only deal but why do you say it is race only? is that something Milidon says? just curious, because it seems pretty sturdy.Chuck Stevens said:The Milodon gear drive is a race only thing, IMHO. I would NOT recommend it on (in) an engine that will see any street useage.
I have never run one, other than the Milidon I have now. It is my understanding that the floating gears in the center on the dog bone style, tend to load the cam gear up as they "float" to one side. Even transfer allot of Vibration and harmonics from the crank to the valve train and vice versa.wesleyj said:I'm not trying to stir up the whole gear drive vs timing chain debate, but does anyone have any first hand experience with any damage caused by a gear drive?
I'm also running Miloden gear drive on my daily work ute, perfect set up for longevity and service life. The gear drive will out live my engine I have no doubt. I have just had the holley blue electric pump I was running give out on me, so ive 'over the shoulder'd it and I'm going mechanical. Just put a standard 2 piece eccentric on with a machined hardened washer 30thou thick behind it to allow the inner section to freely spin. Torque it all down with loctite and it'll go forever. I may have to narrow it a little to clear the timing case, but that's tomorrows problem.I have ran a Milodon gear drive on a 460 with a mechanical fuel pump. I used a factory Ford eccentric and a Carter 429 SCJ pump. This was a few years back, but I think I might have had to make a few minor mods. This was in a jet boat application and it worked out great. I pounded it for four years with no problems. My use consisted of sometimes 30 minute blasts at 6000 RPM. That is where a chain will die when you run some heavier spring pressure for long durations of time. Don't use one of those Pete Jackson (or clones) double idler egg beater designs. The Milodon setup is the only way to go. They use a needle bearing thrust washer, and a single roller bearing idler gear. Chuck Stevens, I wondering why you say do not use a gear drive on the street. To me that is a place that a GOOD (Milodon) gear drive will really shine. If you have a pro street type car or a hot boat with a roller and some big spring pressure you won't see a season of street/ strip use out of a chain. In a Drag race car sure you can get more then on season out of a chain. But what is that in distance maybe 25 miles at best. The Milodons when set up correctly are pretty quiet and smooth. I will say that good belt drive like Danny Bee gives you the best of both worlds. But they are not out there for every engine type plus the cost may be out of line for some applications. Pete