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Aluminum rod bearing clearance #596971 01/29/10 01:00 AM 01/29/10 01:00 AM
Joined: Feb 2005 Posts: 320 PA W w7smallblock OP enthusiast
w7smallblock OP enthusiast W Joined: Feb 2005 Posts: 320 PA	How much is to much on a 1.88 rod journal with a GRP aluminum rod max rpm of around 8500

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596972 01/29/10 01:06 AM 01/29/10 01:06 AM
Joined: Feb 2007 Posts: 1,025 Las Vegas, NV dodgeboy11 super stock
dodgeboy11 super stock Joined: Feb 2007 Posts: 1,025 Las Vegas, NV	How much do you have and what kind and weight of oil are you running? What kind of main bearings do you run (1/2, 3/4 or full groove)? Is it 1/4 mile only? I don't think you could go wrong with .0020", taking into consideration the expansion of the rod.

Re: Aluminum rod bearing clearance [Re: dodgeboy11] #596973 01/29/10 01:27 AM 01/29/10 01:27 AM
Joined: Feb 2005 Posts: 320 PA W w7smallblock OP enthusiast
w7smallblock OP enthusiast W Joined: Feb 2005 Posts: 320 PA	It's a new motor no oil choice yet just mocking everything up and checking clearances i have .0037 and have 1/2 groove mains

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596974 01/29/10 12:12 PM 01/29/10 12:12 PM
Joined: Feb 2005 Posts: 320 PA W w7smallblock OP enthusiast
w7smallblock OP enthusiast W Joined: Feb 2005 Posts: 320 PA

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596975 01/29/10 12:18 PM 01/29/10 12:18 PM
Joined: Apr 2005 Posts: 2,128 Salt Lake City C camastomcat top fuel
camastomcat top fuel C Joined: Apr 2005 Posts: 2,128 Salt Lake City	Quote: That sounds about right, .030-.040 rods and 003-.035 on the mains. That's what I have, and I run 5-50 weight Torco synthetic oil.

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596976 01/29/10 02:13 PM 01/29/10 02:13 PM
Joined: Aug 2003 Posts: 43,206 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,206 Bend,OR USA	I take it this is drag race only motor, if that is so the clearances you have are more than adequate with any weight oil unless your heating the oil and running zero wieght oil. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Aluminum rod bearing clearance [Re: Cab_Burge] #596977 01/29/10 06:58 PM 01/29/10 06:58 PM
Joined: Feb 2005 Posts: 320 PA W w7smallblock OP enthusiast
w7smallblock OP enthusiast W Joined: Feb 2005 Posts: 320 PA	Nobody else has an opinion? I'll bet if this was a 440source post there would be alot of opinions

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596978 01/29/10 09:09 PM 01/29/10 09:09 PM
Joined: Jul 2008 Posts: 56 Michigan S Sue member
Sue member S Joined: Jul 2008 Posts: 56 Michigan	.003-.005 on the rods but side clearence id go .015-.020

Re: Aluminum rod bearing clearance [Re: camastomcat] #596979 01/29/10 09:12 PM 01/29/10 09:12 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	Quote: That sounds about right, .030-.040 rods

Re: Aluminum rod bearing clearance [Re: jamesc] #596980 01/29/10 09:31 PM 01/29/10 09:31 PM
Joined: Apr 2005 Posts: 2,128 Salt Lake City C camastomcat top fuel
camastomcat top fuel C Joined: Apr 2005 Posts: 2,128 Salt Lake City	ooops .003-.004 is what I meant.

Re: Aluminum rod bearing clearance [Re: camastomcat] #596981 01/29/10 09:47 PM 01/29/10 09:47 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	i know just having fun

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596982 01/29/10 11:32 PM 01/29/10 11:32 PM
Joined: Jan 2007 Posts: 437 south central pa bdaz smblk mopar
bdaz smblk mopar Joined: Jan 2007 Posts: 437 south central pa	Jim a 1.88 rod journal.Hold on I'll go to dads and see what clearance those rice burner rods should have.I didn't now you were building a civic now instead of your demon. 3120lb, small block, 10.5" tire, NA, through exhaust, full int, WITH 83/4 REAR, 9.0 at 150mph

Re: Aluminum rod bearing clearance [Re: bdaz smblk] #596983 01/30/10 12:07 AM 01/30/10 12:07 AM
Joined: Oct 2004 Posts: 1,327 south central,Pa mopar_to_ya pro stock
mopar_to_ya pro stock Joined: Oct 2004 Posts: 1,327 south central,Pa	Quote: I didn't now you were building a civic now instead of your demon. I was told, from a fellow, far far away , not mentioning any names , that it used to be a small block crank, but sat so long it rusted into Bolivian. And that's why the hondazuki, or yamasaki rod size was needed. Just messin' Jim, glad to see you are getting it together.

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596984 01/30/10 01:05 AM 01/30/10 01:05 AM
Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY H hemigod426 top fuel
hemigod426 top fuel H Joined: Feb 2007 Posts: 2,315 MOPAR HEADQUARTERS IN ALDEN NY	3-4 thou rod to crank pin bearing clearance 005 thou if blower motor, side clearance is 2x stock steel not 15-20 more like 30-40 thou and 40-60 on blower motor. hope this helps MOPAR OR NO CAR

Re: Aluminum rod bearing clearance [Re: hemigod426] #596985 01/30/10 10:22 AM 01/30/10 10:22 AM
Joined: Nov 2003 Posts: 10,384 Upstate NY Bigcube I Live Here
Bigcube I Live Here Joined: Nov 2003 Posts: 10,384 Upstate NY	People tend to go too tight thinking alum will expand. You need to go looser, keep in mind the alum will expand in ALL directions. I agree with .003-.004. Jim

Re: Aluminum rod bearing clearance [Re: hemigod426] #596986 01/30/10 10:31 AM 01/30/10 10:31 AM
Joined: Jan 2003 Posts: 8,547 State College, PA RyanJ moparts member
RyanJ moparts member Joined: Jan 2003 Posts: 8,547 State College, PA	Quote: 3-4 thou rod to crank pin bearing clearance 005 thou if blower motor, side clearance is 2x stock steel not 15-20 more like 30-40 thou and 40-60 on blower motor. hope this helps

Re: Aluminum rod bearing clearance [Re: RyanJ] #596987 01/30/10 11:07 AM 01/30/10 11:07 AM
Joined: Oct 2005 Posts: 268 South Central Pa webemopes enthusiast
webemopes enthusiast Joined: Oct 2005 Posts: 268 South Central Pa	are these the heavy duty pathfinder rodbearings? .003 to .004 is good.side clearance on the rods is also pretty important on alum. rods too . it helps keep oil temps down and that is what kills the rods.

Re: Aluminum rod bearing clearance [Re: webemopes] #596988 01/30/10 12:01 PM 01/30/10 12:01 PM
Joined: Feb 2005 Posts: 320 PA W w7smallblock OP enthusiast
w7smallblock OP enthusiast W Joined: Feb 2005 Posts: 320 PA	Thanks for the info. Ronnie, Kenny, and Joe i hope this will be the fastest quad 4 in town with one W7 head on it.

Re: Aluminum rod bearing clearance [Re: w7smallblock] #596989 01/30/10 11:57 PM 01/30/10 11:57 PM
Joined: Oct 2004 Posts: 1,327 south central,Pa mopar_to_ya pro stock
mopar_to_ya pro stock Joined: Oct 2004 Posts: 1,327 south central,Pa	Quote: i hope this will be the fastest quad 4 in town with one W7 head on it. Now that's some funny stuff there, Jim, if you need anything, just call. I need to get up your way to see what's new anyway. Later

Re: Aluminum rod bearing clearance [Re: mopar_to_ya] #596990 01/31/10 01:34 PM 01/31/10 01:34 PM
Joined: Feb 2005 Posts: 320 PA W w7smallblock OP enthusiast
w7smallblock OP enthusiast W Joined: Feb 2005 Posts: 320 PA	Ronnie if this weather every breaks you'll have to stop over. I saw the pictures of the inside of Colby's dart trunk on the other post it looks real good. You should post some pictures under members projects. See ya , Jim

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