To anyone interested, I sent my stock crank damper to ATI. They are drawing up plans for a 928 Super Damper. You can check out the design of their Super Damper on their website. These are custom made. The first few are $500 each. If I call back & add to the order the price will come down into the $450 range. Those of you out there who build their own engines know the importance of a crank damper on a performance engine, especially a stroker. So far the order is for two. If it goes over 5 I believe the price will come down. I am getting the two whether anyone joins in or not but if you're in the market for a state of the art balancer here's your chance.
Regards, Hammer

P.S. I forgot to add, there will be additional bolt holes around the damper hub to drive accesories, dry sump pumps, etc., for those so inclined.

 

Hey Hammer what is better about this one over stock?

 

+1

 

This is great! If Hammer didn't have ATI make 928 dampers I was going to call them and do it. Thanks Ham', I'm in.
Godzilla, an ATI damper is of interest for a high power build, especially a stroker. It's hard to fork open up the wallet for a good damper, you can't tell what it's doing, it just keeps your crank and block from breaking. A typical race engine will have several degrees of crank twisting, you can put a strobe on it on a dyno and see it. An inadequate damper can break cranks and cause great stress on the block and bearings too. ATI is desired because they have a good reputation, are used in many top race teams and are one of the few that actually tests dampers. A good damper is something you have to have for a trouble free bottom end on your stroker build.

 

Good info!

 

H,
It's sort of like buying life insurance for your crank, bearings, & block. Nobody likes to pay for it because you don't receive anything tangible for your money. But in my opinion it's necessary for hi-po motors, especially strokers or supercharged motors. In higher hp motors the vibration & torsional twist increases & only produces problems. Problems that many times are attributed to something else.
Hammer

 

I wonder if this has anything to do with the block cracking on some of the high-horsepower 928 engines?

 

Hopefully Sterling will chime in here. I think he ran a Fluidampener on his stroker and had some problems and went back to stock.
Is the ATI a repro of stock with better materials, or is it a different design altogether?

 

I could be in on a group buy if you put it that way. I sell Life insurance actually, and it makes sense if what you are saying is true. I have a scat crank - do I need to get other dimensions to see if I can be in the group buy?

 

There are racing engine builders who will first question the damper when they see a cracked block.

atb, about Fluid dampers, they are wonderful if they stay like they were when new in theory but are prone to problems if they leak or the temperature changes. If you have a leak you could have serious engine problems from something that you shouldn't have to worry about after it's installed. Most crank companies including Moldex will tell you not to use fluid dampers at all. It wouldn't be a surprise if fluid dampers drop off the map completely soon.

 

ATI will make the damper a press fit over the snout, I measured a Moldex and an S4 crank and came up with 1.5745" as the target snout, ATI will use that number and make the damper bore an appropriate amount smaller. You can check your Scat and let us know the actual size but it should be fine.

 

This excerpt from ATI's web site may clear things up for some:
http://www.atiperformanceproducts.co.../101/index.htm
You can also go elsewhere on the site to see the pictures of the Super Damper.
Regards, Hammer

 

Are you going to have them designed to mate with the stock pulleys or is this an off-road application only?
Their Super Street versions says 5800 max rpm so I'm assuming you are having a race version built?

 

That's a Chevy only non-rebuildable, non SFI approved consumer product, it's of no interest to us.


So are we still at 2? Where's Erkka?

 

Dude, my starter will spin the engine to at least 6K rpm.