Fuildampr or ATI damper

im going with fluid damper most likely. You going to have it done to pull at sturgis in march.
 
For ease of fitment, go Fluidampner. I think ATI might be better, but it on't work with a stock Cummins fan. Either need to run electric fans or make a adapter to push the fan out a 1/2".
 
Jordan thats a drill weekend for me so I really dont think i'll make that one. I'll have to see what shape the truck is in. Still have a ways to go
 
i'll be there but watching been i havnt got my piston yet and machine shop not done with the head yet. I might get a wild hair in pull dmax though.

I think ATI has the timing marks on it and Fluid Damper doesnt.
 
well thats another issue I'm having see my tack tread. I'm just trying to get all my parts to play well with each other the first time.

You pulling with mwp?
 
like to but i dont know if my turbo will pass and i done sold my old one i ran last year. I need to clear that up with adam before i pay dues
 
I gotta derail this thread a little..

I was told that these things throw off the balance considerably, Is this true?

They had the engine balanced to within a certain amount of grams, they threw the fluidampr on and the balance was way off. But I've been in a friends truck that had one and it was smooth as could be.. what gives?
 
A custom S400 with 2.6 cover. i was thinking the compressor dia. be to big. But mickey told me the other day that he got a S465.

Lucky Jeff
Machine shop told me to go with fluid damper when they get done with my bottom end. So i cant see that being true.
 
Johndeere9610 said:
jflag do you have an ati?
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Yeah... I had a friend thats a machinist that was supposed to make me a new shaft for the fan clutch that pushed the fan out a 1/2" so I could use the stock fan, but after a year of excuses I got my parts back and put the pulley back on and have just been driving it without a fan. I guess I'll get some electric ones when the weather starts to warm back up. As of right now, without the fan my temp guage doesn't go past 150* when its 30-40 outside, so I'm not worried about overheating just DD it. I do have a coolant bypass and I drilled a couple small holes in the thermostat to relieve some more pressure... might have to put a new one in though, it takes to long to heat up in the moroning when its 15* LOL
 
Lucky Jeff said:
I gotta derail this thread a little..

I was told that these things throw off the balance considerably, Is this true?

They had the engine balanced to within a certain amount of grams, they threw the fluidampr on and the balance was way off. But I've been in a friends truck that had one and it was smooth as could be.. what gives?
Click to expand...

a fluidamper can not be balanced, since i literally has a fluid inside of it. therefore if you know you are running a fluidamper the rotating assembly should be balanced with out a balancer at all, then add the fluidamper-will be smooth as silk.


if you balance the complete rotating assembly to include the balancer, then add the fluidamper it's a bit of a crap shoot, it should still work well, but not not perfectly. it kind of depends on how much material was added to or removed from the stock damper during balancing. if a lot of weight was changed the fluidampr will throw it all off, if nothing was changed, the fluidamper will work awesome.

i can't speak for an ATI as I have never looked into one. i don't think they are a viscous type of damper like the fluidamper so it would need to be balanced with te whole rotating assembly.
 
I have the ATI and it is smooth all the way to 5k. The way it was explained to me is that the viscous damper is not big enough to do the job correctly. When shut off the weight is at the bottom then on startup it finds it sweet spot but with our cummins, the rpms override the weight and viscous fluid so the weight ends up being in the wrong spot and then gets slammed around thus the reasons for the extra dowel pins to help hide this issue. Now before i get stoned here, i know people like BigBadDodge run them and have great luck so i have no response for that except I dont know.

To me viscous dampers are big heavy dampers that work great on lower rpm motors like semis and ship motors because they also add rotating inertia. For competition i prefer lighter weight for faster quicker revs. The elastomer damper is a 360* rubber band that no matter where the assembly needs some absorbtion, its there and ready regardless of rpms or size.

This is just my take, im not a salesman even if i sound like it.LOL It just made sense to me so i went with it.The degree ecthing is great. The stock fan not working sucks but i think they might have one that solved that problem now.
 
You could solve the issue with ATI hitting the fan by countersinking the 6 bolts around the outside.

I love my ATI. I've said it before, but it's done it job when the flywheel bolts backed off the crank. It's always been smooth and I don't think the Fluidampr does as good a job at >4k RPM.
 
joefarmer said:
You could solve the issue with ATI hitting the fan by countersinking the 6 bolts around the outside.

I love my ATI. I've said it before, but it's done it job when the flywheel bolts backed off the crank. It's always been smooth and I don't think the Fluidampr does as good a job at >4k RPM.
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Are you talking about recessing those bolts yourself or that ATI should? Have you done that on yours? I thought about it, but I don't know the construction and would hate to drill into something that I'm not supposed too...

I did mention that in a previous thread... as much as the ATI costs, you think they would use 6 more countersunk machine screws like the others provided so you could keep the stock fan. Though, electric fans would free up a few more ponies...
 
JFlagg said:
Are you talking about recessing those bolts yourself or that ATI should? Have you done that on yours? I thought about it, but I don't know the construction and would hate to drill into something that I'm not supposed too...

I did mention that in a previous thread... as much as the ATI costs, you think they would use 6 more countersunk machine screws like the others provided so you could keep the stock fan. Though, electric fans would free up a few more ponies...
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They will do that for you. They told me i could send mine back and they would use the countersunk for all the bolts
 
ILLINOISRAM said:
They will do that for you. They told me i could send mine back and they would use the countersunk for all the bolts
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Why didn't you mention that in the other ATI-Fluidampner thread!? LOL Did they charge you anything other than shipping both ways?

Not that I expect to need it, but do they still honor the warranty after they do this mod?
 
JFlagg said:
Why didn't you mention that in the other ATI-Fluidampner thread!? LOL Did they charge you anything other than shipping both ways?

Not that I expect to need it, but do they still honor the warranty after they do this mod?
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uh-uh cause i called them after that thread. LOL. It would only cost the shipping and it would still be certified.
 
I can tell you that in the gasser world there are a couple of well known crank manufacturers who state categorically that if you put any kind of fluid damper on thier cranks there is no warranty precisely because they go out of balance at certain speeds/rpms and will contribute to a cracked crankshaft
 
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