Station your PM box is full and i need to order my valve, shaft

i am just about done with my construction (see my sig) all i have left is plumbing...fuel, tranny cooler, PS cooler, Vents, exhaust... my problem is i dont think i have enough room for a double ended ram (that i was going to gt from Station) i do have room for dual single ended rams... i searched and didnt see any body doing this...

also see if this is right (my math)

2 single ended rams 1.5" bore 1" dia shaft 8" stroke

(bore squared X pi X stroke)-(shaft radius squared X pi X stroke) = each cylinder volume X 2 cylinders = total Cylinder Volume / 4 turns lock to lock = Displacement

(1.5" X 1.5" X 3.14159 X 8)-(.5 X .5 X 3.14159 X 8) = 50.26 X 2 = 100.52 (CV) / 4 = 25.13 Displacement

my head hurts

Originally posted by redruM
also see if this is right (my math)

2 single ended rams 1.5" bore 1" dia shaft 8" stroke

(bore squared X pi X stroke)-(shaft radius squared X pi X stroke) = each cylinder volume X 2 cylinders = total Cylinder Volume / 4 turns lock to lock = Displacement

(1.5" X 1.5" X 3.14159 X 8)-(.5 X .5 X 3.14159 X 8) = 50.26 X 2 = 100.52 (CV) / 4 = 25.13 Displacement

my head hurts

more accurate, if the rams are opposed (both with the shaft pointed outwards) would be:
(1.5"x1.5"x3.14159x8)-(.5x.5x3.14159x8)=50.26= displacement of cylinder compressed (rod in the middle of it)
(1.5"x1.5"x3.14159x8)=56.55= displacement of extended cylinder (no rod on this side) equals total displacement for the pair of 106.81 cubic inches/4 turns = 26.7 cubic inch/revolution valve. which isn't a huge difference, but might change your valve selection...

Any pics of that beast yet?
Chris

I thought volume of a cylinder was area of one end times length? You guys both calculated the circumference of the cylinder, and the area of the ram? I think it should be

.75*.75*3.14159*8=???? for ram volume, then the same you used for shaft volume.

see what I mean, am i wrong?

Originally posted by GO 4LO
Any pics of that beast yet?
Chris

Yes but im not posting any untill i get the axles back (they are at the shop getting the gears set up)

my rockstomper wheels should be here next week, the axles should be done next week, fuel, tranny should be finished next weekend, that leaves steering and exhaust for the following week !!!

6 months ago i thought i would be done in 2 months :rolleyes:

okay maybe one *** this is from 3 weeks ago when the suspension was finished but before the axles were sandblasted

one more

oops

thanks horse

STATION ???

The volume of the two cross connected cylinders that you specify is 21.99 in.^3 . If you want 4 turns lock to lock you would need a valve with a 5.49 in.^3 displacement. I can not get that exact valve, but your closest options are a 4.8 in.^3 , and 6.0 in.^3 . SO it depends on if you want a little slower or faster than 4 turns lock to lock.

Sean

I like how you mounted your upper control arms on your out-riggers (rock sliders). I am building my project much the same way. Your link setup all together looks very similar to how I am building mine, only I am using heim joints. I look forward to hearing how it performs for you, as yours will be finished LONG before mine.

Sean

Are those coils Lift coils for a TJ, or something else? Could you tell me the OD of the spring, and the unloaded height please? They look like they might be exactly what I need.

Thanks,
Sean

Originally posted by elf_cruiser
I thought volume of a cylinder was area of one end times length? You guys both calculated the circumference of the cylinder, and the area of the ram? I think it should be

.75*.75*3.14159*8=???? for ram volume, then the same you used for shaft volume.

see what I mean, am i wrong?

oops!!! good catch elf, I didn't look at his cylinder size, just his calculations, as a 1.5" diameter cylinder seems kinda small to me...I'm using a 2.5" bore doube ended cylinder for mine... with a 1500 psi pump his will produce 4123 lbs of force, where mine will produce 6185 lbs of force, all else being equal (I am actually going to use a 2500 PSI hydraulic pump though, for 10,308 lbs of force...)

I am actually going to use a 2500 PSI hydraulic pump though, for 10,308 lbs of force..

dayum! you running duallly F&R 54" michelins??????

Originally posted by Station
I like how you mounted your upper control arms on your out-riggers (rock sliders). I am building my project much the same way. Your link setup all together looks very similar to how I am building mine, only I am using heim joints. I look forward to hearing how it performs for you, as yours will be finished LONG before mine.

Sean

hopefully this will give me a real long, long arm suspension and keep the axle centered under the Jeep... im getting close 3-4 weeks is the target

Originally posted by Station
Are those coils Lift coils for a TJ, or something else? Could you tell me the OD of the spring, and the unloaded height please? They look like they might be exactly what I need.

Thanks,
Sean

8" Skyjacker fronts in the front,

stock TJ fronts or 4" Procomp fronts in the rear

i will measure tonight

Originally posted by Station
The volume of the two cross connected cylinders that you specify is 21.99 in.^3 . If you want 4 turns lock to lock you would need a valve with a 4.49 in.^3 displacement. I can not get that exact valve, but your closest options are a 4.8 in.^3 , and 6.0 in.^3 . SO it depends on if you want a little slower or faster than 4 turns lock to lock.

Sean

i think the little faster would be better

aren't you afraid you are going to rip off the upper control arm, i don't see what is really supporting it. and it looks like the control are has about 1" of uptravel before it hits the support for the rockerslider. just wondering

Originally posted by swamper502
aren't you afraid you are going to rip off the upper control arm, i don't see what is really supporting it. and it looks like the control are has about 1" of uptravel before it hits the support for the rockerslider. just wondering

pic was taken before sliders, gussets were finished this was mocking up locations for the mounts and checking clearances.

There is only 1 1/2" clerance between the slider and the upper arm. but the upper arm hits the slider and the frame just before the tire would go through the hood... 1 1/2" = 8 1/4" travel @ the axle = 13" at the tire (UpTravel).... bumpstops will keep the tire out of the hood...

The rock sliders are welded to the frame and the exo cage so they should be stout

okay too much beer last night but question

with 2 single ended rams on a full hydyo setup do i still need a tie rod ??? i would think that since the rams are mounted in parallel i would not but my buddy says if i dont the rams will bleed off and change my toe ???