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Jared,
FWIW, I'm planning to run a stock P-Pump, mod'd with the West Texas mods. I've been running this same pump with my assist with good results.
I run the larges crank pulley GM made, and the smallest PS pulley GM made. Sometimes V-Belts have their advantages .
My orbital is non load reactive. I ain't skeer'd. If it's a little squirrely at higher speeds, meh. I run square driveshafts. I probably shouldn't go that fast anyway. Right now, with the big ram on my assist, the system turns too slow. THAT is squirrely at higher speeds. I usually end up ping-pong-ing trees on rutted hill climbs.
As I said before, If it all works out like I plan, you're welcome to drive mine around to feel out the steering. I would also encourage you to talk to Dom or Ryan about doing the same in one of their trucks. They run double ended PSC setups. I've driven both and they are nice.
I was reading up on this even more last night and noticed that the hydro bible on Pirate was saying that you shouldn't run a load-reactive orbital with a single-ended cylinder anyways. Not sure why, but that's what it said.
I also heard that it wasn't until around 40-45 that things get scary with a single ended -- but that's the fastest my rig is likely to see anyways, so that shouldn't be an issue.
Yeah that's definitely the plan. I'm really curious how yours works out, because I think a 2" bore might be my best option if I go single-ended. It looks like I can get away with a lower displacement orbital (less stress on the pump) and since it's a smaller cylinder, there is less fluid in the system -- and less differentiation in fluid levels between left and right stroking.
I was playing with the hydro design calculator a bit last night and made some slight changes to it so that I can try to find an optimal cylinder size and valve displacement that gives me a desired lock-to-lock (targeting about 2.5) and is within the stock pump specs. A lot of it is (obviously) dependent on the stroke of the cylinder, which of course is dependent on steering geometry. The stock pump is obviously a huge limiting factor.
At least I now feel comfortable with all the terminology and concepts so I can hit the ground running in figuring everything out once I get an axle and figure out the steering geometry. I was expecting more of a difference in price between load reactive and non-load reactive orbitals -- but it's neglible. So it seems the only real difference in price is the ram itself and the mounting.
Last edited by SirFuego; 08-25-2010 at 10:40 AM.
im not vouching for anything about cam going slower.. In fact i'll keep my fingers quiet about cams driving style
Just wait, I might be able to crawl if it's dry... I took the cutoff wheel to my tires again
Countdown til chad tells you you did it wrong...
Honestly though that line of logic is correct, and it's why I T'ed back off my cooler (in front of the rad) to the second suction ports on my pump housing/reservoir. The main suction draws from my other res that is above and behind the pump. So no matter if I'm climbing or descending, fluid can flow downhill to the pump... Not starving the pump, using good quality fluid, and running a conservative (read: stock) pump all helps in the pump longevity department.
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