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clearance between hub and snout (ati superdamper)Highlander 03-16-2005, 12:06 AM Well.. i still have yet to install my front damper.. i called ATI and they told me the correct clearance is "ten thousands" then he says .001. Which is it? I would like to know with the instructions, what is the clearance for a press fit? Thanks Lonnie Pavtis 03-16-2005, 12:25 PM I do not have a direction sheet presently, but I believe the following to be correct. It is .001 press fit, not clearance for steel dampers. Highlander 03-16-2005, 12:40 PM My Snout measures 1.247" (callies racemaster) and the ati bb hub measures 1.242" Can i just heat up the hub and install it and let it cool? chevyguy3 03-16-2005, 03:52 PM take the time to hone the hub to the correct fit. despite it seeming too tight to me, i forced an ATI superdamper onto the callies racemaster crank on my last engine because when i asked about it, thats what the guy who machined my shortblock said he always does. when it came time to try to get it off, all i managed to do was break 3 different hub removers and several grade 8 bolts trying to pull it back off and had no luck atljar 03-16-2005, 04:11 PM Off topic... On the ATI superdampre there are either 5 or 6 torx bits on the front of it. One hole is marked "alignment hole" or something to that effect. Isnt that suppossed to have a torx screw in it too? I dont remember when mine went together, but now there isnt anything in there. chevyguy3 03-16-2005, 04:12 PM it should have 3 flat face bolts, and 6 countersunk bolts in it Highlander 03-16-2005, 05:24 PM I talked to callies and they told me i should have around .003 clearance.... its a bit odd that you have that much clearance as you have that with pistons and they are not supposed to be pressed fit.. I will try and hone it to the 1.249" if at all possible which i am not sure if it could be done or not.... Lets hope and see. atljar 03-16-2005, 06:35 PM it should have 3 flat face bolts, and 6 countersunk bolts in it Its one of the countersunk ones. Guess I will call ATI and get a new one, and install with a little locktite this time Lonnie Pavtis 03-16-2005, 08:45 PM Highlander..... re-read my first post. The confirmed press fit should be .0009" to .0012". If you hone to 1.249, you will have .002 clearance & a junk hub. It should be 1.246" to have a .001" press fit on your 1.247 crank. taner 03-16-2005, 09:21 PM Its one of the countersunk ones. Guess I will call ATI and get a new one, and install with a little locktite this time be careful with the loctite, i can't get those bolts off now! doh!!! lol!!! Highlander 03-17-2005, 02:10 AM THANKS man.... i thought he meant the other way around.. THANK YOU!!! i knew something was not right....... having .002 overbore is like the pistons... they are not press fit.. thanks thanks thanks... getting that done. Injuneer 03-17-2005, 11:40 AM Sounds like what he said (or should have said) is you need a 10/10-thousandths (0.0010) interference fit. | ||