Oil bearing clearance high WHP - Page 8 - MY350Z.COM Forums



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Old 11-25-2014, 05:26 PM   #141
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Define..Much bigger please
Lol I can't tell you exactly what to use. Look at the other posts in this thread that should give you a good idea. I'd probably look at around .003X neighborhood for both.
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Old 11-25-2014, 06:13 PM   #142
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Well, I already have the std acl bearings in hand so what should I set them to? Just within the std oem specs then as posted in the white box a couple below?
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Old 11-25-2014, 08:14 PM   #143
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Well, I already have the std acl bearings in hand so what should I set them to? Just within the std oem specs then as posted in the white box a couple below?
Are you assembling this yourself?
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Old 11-25-2014, 11:49 PM   #144
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Well, I already have the std acl bearings in hand so what should I set them to? Just within the std oem specs then as posted in the white box a couple below?
You want ACL HX bearings for any serious HP application.
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Old 11-26-2014, 02:46 AM   #145
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I was going to assemble myself but it's at the machine shop and I may get them to do that part so the clearances can be on point. I'll do the remaining myself.

I've read so much and most say just go w the std, which is why I got the std sized acl's. I haven't opened them yet and can send back for an exhanexhange if I can get the correct answer on them.

I'd like to soon as I have rods in hand and pistons are on the way. Any help is appreciated, thanks
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Old 11-26-2014, 02:56 AM   #146
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I was going to assemble myself but it's at the machine shop and I may get them to do that part so the clearances can be on point. I'll do the remaining myself.

I've read so much and most say just go w the std, which is why I got the std sized acl's. I haven't opened them yet and can send back for an exhanexhange if I can get the correct answer on them.

I'd like to soon as I have rods in hand and pistons are on the way. Any help is appreciated, thanks
I really recommend NOT going stock clearances. The oil clearance needed for 220whp is far different than 500whp+
You're gonna want more. I'd suggest talking this over with your machinist. There are some oldschool rules of thumb that can apply, but everyone has their own school of thought. I wouldn't like the idea of running less than the .003X neighborhood on something over 500whp. But it does depend on what oil you plan on running based of the temps you see in your area, what you want the car to do, etc.
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Old 11-26-2014, 05:59 AM   #147
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Id like to track it a tiny but doubtful it'd see the track but once or twice per year if any. Drag strip...prob not but if I do, it wouldnt be too much at all.

Mainly just want it to be a gun street-able weekend toy to sum it up on what I want it for. I'd like to not have to worry about snapping a rod or spinning a bearing.
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Old 11-26-2014, 11:32 AM   #148
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I tried using the ACL STD and got .0015mm clearance

I used ACL HX bearings and I couldn't get a higher clearance than .0025

If I wanted bigger clearance the machine would have to grind down the crank
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Old 11-29-2014, 06:19 AM   #149
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I'm taking everything to the machine shop mon and going to see what he comes up with.

Edit.
So youd suggest to go w the hx series then ?

Last edited by taywan; 12-01-2014 at 04:18 PM.
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Old 12-02-2014, 04:54 PM   #150
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I'm taking everything to the machine shop mon and going to see what he comes up with.

Edit.
So youd suggest to go w the hx series then ?
FWIW, I had a set of undersized ACL's, and had dynosty build the block. They got rid of my ACL's (actually refunded me for them because I originally purchased them from dynosty), and got me a completely custom set to use. I don't know what the clearances actually are, but I'm supposed to run 10w40. Judging by my hopeful goals of over 600whp, I am willing to bet they are around .003.

See what your machinist has to say. Tell him all your goals. Both long and short term.
Just because you track it only once or twice, doesn't mean you can all of a sudden run tighter clearances.
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Old 12-03-2014, 04:57 PM   #151
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Ok, Ill shoot for this .003 range and hope she does well. Thanks
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Old 01-28-2015, 12:39 PM   #152
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Got mine back in hand and here are the clearances.
Mains: .0025-.0027
rods: .0026-.0028

trying to get opinions from a couple different people on which type/weight of oil to break in and then after break in. Any suggestions would be appreciated.

Last edited by taywan; 01-28-2015 at 12:51 PM.
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Old 01-29-2015, 08:49 PM   #153
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Quote:
Originally Posted by taywan View Post
Got mine back in hand and here are the clearances.
Mains: .0025-.0027
rods: .0026-.0028

trying to get opinions from a couple different people on which type/weight of oil to break in and then after break in. Any suggestions would be appreciated.
I'm using non synthetic 10w40 and adding oil break in additive
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Old 01-30-2015, 03:53 AM   #154
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Thanks, and then after the break in, still going to use the 10-40 (of course full synthetic) ? Had some suggesting some valvoline 15w-40 but not Rotella though.

Edit. And by the way, I ended up using half and half on the rod bearings to get my clearances: hx series and std. The hx's alone ended up being a little too loose And not sure if the crank had ever been worked on either.

Last edited by taywan; 01-30-2015 at 03:57 AM.
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Old 01-30-2015, 10:37 AM   #155
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Thanks, and then after the break in, still going to use the 10-40 (of course full synthetic) ? Had some suggesting some valvoline 15w-40 but not Rotella though.

Edit. And by the way, I ended up using half and half on the rod bearings to get my clearances: hx series and std. The hx's alone ended up being a little too loose And not sure if the crank had ever been worked on either.
any specific way you installed them? I.e. HX on the bottom for all or alternating?
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Old 01-30-2015, 12:03 PM   #156
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I let my machine guy do it so he could get me my clearances correct. I can ask him but next time I speak w him.
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Old 01-30-2015, 12:20 PM   #157
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So this is out of the FSM,
MAIN BEARING OIL CLEARANCE Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in)
Limit : 0.065 mm (0.0026 in)

CONNECTING ROD BEARING OIL CLEARANCE Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in)
Limit : 0.070 mm (0.0028 in)

So should clearances be set at .04X for ~500Whp or what?
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Old 03-13-2015, 01:12 PM   #158
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So is .0048 to big rod oil clearances?
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Old 03-13-2015, 02:03 PM   #159
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So with plastiguage I got .0030...WTF
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Old 03-15-2015, 05:57 AM   #160
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yes lol that is a clearance you would want for a 1800+ whp v6 lol and you would be likely running 75 weight oil, 60 weight at a bare minimum.

second your using plastiguage, throw that in the trash and grab actual mics, dial bore guage and caliper.
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So is .0048 to big rod oil clearances?
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