Ford 502 oil clearance???

[Bajajet]

I posted this on another board but am looking "marine" suggestions.
Assembled my short block this weekend. I ended up with slightly less than .002 on the rods and slightly over .002 on the mains. Not quite where I wanted to be. Is it possible to get bearings that are .001 under as this is a crank that has been cut .010 on both rods and mains????? (So they would be .009" bearings I guess) I have heard of people mixing bearing shells (as in .010 and .011) to get the right clearance. Is that acceptable? Just don't want to do this again!
Help!!!!!

[mickeyfinn]

Don't know about that but you can get the crank machined for the extra clearance.

[steelcomp]

Don't know about that but you can get the crank machined for the extra clearance.
You're not going to get .001 taken off a crank. You need .0025 on your rods, and at least .003 on the mains, .0032-.0035 if you're building big power. You can get .001 over bearings, just shop around. I'd look into Fed Mogul. They usually come with an extra .0005 typically, anyway. Childs&Albert, King, and ACL are others that you might find what you're looking for. I know for a fact that Fed Mog and King offer them in Chev.

[DeputyDawg]

If you need a great place to get bearings from go here http://www.wisespeedshop.com/Clevite.htm The part number for .001 under Clevite rod bearings is CB743P-1 and the number for the .001 under mains is MS829P-1. Hope that helps.

[396_WAYS_TO_SPIT]

Take it to the machine shop and have them mic' it before you spend extra $$ on fancy bearrings. Plastiguage is a little less clearance than a mic'

[Bajajet]

Take it to the machine shop and have them mic' it before you spend extra $$ on fancy bearrings. Plastiguage is a little less clearance than a mic'
Yup, crank checks out as do the main bearing bores and rods. It appears to be just how the tolerances are stacking up. I agree plastigauge is just that, plastigauge!

[MESA BALANCING]

like all the guys are telling you plasti gauge is window calking make sure they put a bore gauge in it for you and that way you know what you have . By the way I can take .001 out of a crank or even .0005 by grinding not by polishing like many shops try to do and then you wind up with a crank that is not perfectly round and straight because of the polishing. That crank needs .003 on the mains and .0025 like the other gent said. Best of luck Laz

[Ralph Brunt]

hey baja getting ready to do the same build should be getting my stuff from scat on tuesday where did u get your stuff from? how about posting some pics. ralph

[Bajajet]

hey baja getting ready to do the same build should be getting my stuff from scat on tuesday where did u get your stuff from? how about posting some pics. ralph
I bought the parts from Brian Adams at AD Performance. Here's a few pics
http://www.ats-inc.net/bajajet/2005/Resize%20of%20DSC02797.JPG
http://www.ats-inc.net/bajajet/2005/Resize%20of%20DSC02798.JPG
http://www.ats-inc.net/bajajet/2005/Resize%20of%20DSC02801.JPG
http://www.ats-inc.net/bajajet/2005/Resize%20of%20DSC02807.JPG
http://www.ats-inc.net/bajajet/2005/new%20motor.JPG
And the boat it lives in
http://www.ats-inc.net/bajajet/2005/Resize%20of%20DSC02819.JPG

[Ralph Brunt]

yup same place ad performance keep us posted nice boat and engine did you have to do any machining to the components?? is your stuff eagle or scat?? mine is scat 4.14 and 6.700 je srp 0.30 flat top shooting for 10.5 comp d3 heads. what kind of oil pan you running? still have to get one thinking about the milodon. what cam you running i'm going a solid roller specs unknown yet. i see the front sump :confused: that's what i had in mine worried about oil starvation just something to think about ralph

[Bajajet]

This is Scat stuff and JE/SRP pistons. 28cc dish .030 over, 6.7 rods. Ordered a 4.14 crank but it appears to be 4.15, no big deal as the block was mocked up with the crank anyway. Worked over D0VE heads with 2.19/1.76 valves. Cam is Comp XM-288H. Made right at 503 HP at 5000 rpm in January. Nothing fancy.
Oh, oil pan, FOMOCO CJ oil pan. Yes I know front sump. I don't turn any kind of high rpm so it seems to work fine. It has a baffle over the sump. If you use one make sure you find one with the thick baffle plate. the thin one is 22 gauge and the good ones are 16 gauge. Found that piece of info after cracking one and then the research! Bet you can guess which one I have now.

[Ralph Brunt]

what did your comp ratio end up being??

[Bajajet]

9.8 was theoretical. Didn't cc the heads so who knows where it ended up exactly.

[LakesOnly]

Just a note: prior to asssembly, dimensions on brand new parts should be considered equally as suspect as used parts...regardless of supplier. One size does not fit all and it's in the end user's best interest to bring the newly utilized part to specification as required for his specific build.
Some people are against the idea of opeing up the Ford's mains to .003" and above...and sometimes for legitimate reasons...but in this application I personally feel that the .003" clearance is appropriate.
LO

[Bajajet]

I agree more clearance is needed. I found some King bearings that will hopefully do the trick. They suffix on the part nuber is X for extra clearance. According to King, it is around an extra .001. Just have to wait for them to show up.

[058]

Some people are against the idea of opeing up the Ford's mains to .003" and above...and sometimes for legitimate reasons...but in this application I personally feel that the .003" clearance is appropriate.
LOFor marine and/or high RPM use I think .003" is the absolute rock bottom minimum clearance that should be used. IMO the big Ford crank should have .0035" to .004" to accomodate the 3" mains.

[GofastRacer]

Take it to the machine shop and have them mic' it before you spend extra $$ on fancy bearrings. Plastiguage is a little less clearance than a mic'
Plastiguage is "GARBAGE" period!.. You mic the crank, torque the caps and use a dial bore guage to compare clearance!..

[058]

Plastiguage is "GARBAGE" period!.. You mic the crank, torque the caps and use a dial bore guage to compare clearance!..
Hey Art....How was the vacation??

[Ralph Brunt]

hey baja how did the engine turn out
??????????????? ralph

[Bajajet]

Not together yet. Checked crank and rods again and found the rod journals had a slight taper. That meant cut it :angry2: Did get King extra clearance bearings for the mains and that turned out nice .003-.0035". Waiting for the same type of bearing for the rods now. One step at a time!
Craig

[Ralph Brunt]

thanx for the update just got my block back from the machine shop and started the mach up face check my end clearance. did'nt want to use plasti gage on the main's so waiting for a dial bore gage will post a few pics this weekend thax again keep us posted ralph

[Bailey]

Make sure you guys really check the balance on those scat cranks. I ordered one for my stroker and it was way out and ended up needing alot of work to make it right.

[Squirtin Thunder]

Lakes, High Flow Dynamics has some great products coming out that any Ford guy would be jazzzed about !!!

[dmontzsta]

Lakes, High Flow Dynamics has some great products coming out that any Ford guy would be jazzzed about !!!
Aint that the truth, Paul is doing great things to keep the big Fords rolling.

[LakesOnly]

http://www.ats-inc.net/bajajet/2005/Resize%20of%20DSC02798.JPG
Just want to make note of a couple of nice features found on the SCAT stuff that is not found on all chinese-borne stroker kits. In the above photo, note the bullnosing on the leading and trailing edge of the crank throws. Also, note that the oil holes in the mains are chamfered only toward the leading edge of the journal (relative to crank rotation) so as to direct oil to the oiling hole (and to the rods).
LO

[LakesOnly]

High Flow Dynamics has some great products coming out that any Ford guy would be jazzzed about !!!
SHHHHH! :eek:
LO

[LakesOnly]

Aint that the truth, Paul is doing great things to keep the big Fords rolling.Just wait, Don. I have a few more things to get in order around here, and then some neat new products will come up. :crossx:
I have to say that bringing stuff from R&D to market is a long arduous path...definitely more of a labor of love than anything, but very personally satisfying nevertheless. Having to also learn the business ropes simultaneously makes it that much more involved. (Superdave, you were right, man. I am covering my shit and have hired an accountant, etc. in an effort to keep everything in order.)
LO