main bearing clearance?
#1
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main bearing clearance?
ls/vtec.
i have .0015" of clearance on the mains, with .0017" in the #3 cap. oem bearings. is that sufficient clearance or do you guys think i should step up to the next size bearing and get .0017"? i plan on spinning to 9000 or so. the motor is going to see quite a bit of mileage as it is my daily for the warmer months so i figured .0015" should be okay but i wanted to confirm.
i have .0015" of clearance on the mains, with .0017" in the #3 cap. oem bearings. is that sufficient clearance or do you guys think i should step up to the next size bearing and get .0017"? i plan on spinning to 9000 or so. the motor is going to see quite a bit of mileage as it is my daily for the warmer months so i figured .0015" should be okay but i wanted to confirm.
#2
Re: main bearing clearance?
I would think you'd be OK but I set up my build at about .002 after reading everyone's info online. Got me scared to go too tight. LOL I run 15w-40 now too just to make sure. And I have 80+ psi under WOT with my new oil pump. Most people tend to go a little looser for safety I think (after my research). Sorry, because I know this might not help much.
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Re: main bearing clearance?
ls/vtec.
i have .0015" of clearance on the mains, with .0017" in the #3 cap. oem bearings. is that sufficient clearance or do you guys think i should step up to the next size bearing and get .0017"? i plan on spinning to 9000 or so. the motor is going to see quite a bit of mileage as it is my daily for the warmer months so i figured .0015" should be okay but i wanted to confirm.
i have .0015" of clearance on the mains, with .0017" in the #3 cap. oem bearings. is that sufficient clearance or do you guys think i should step up to the next size bearing and get .0017"? i plan on spinning to 9000 or so. the motor is going to see quite a bit of mileage as it is my daily for the warmer months so i figured .0015" should be okay but i wanted to confirm.
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Re: main bearing clearance?
Is this a daily driver or a tracker? You're running it on the tight side but it has worked. I'm not a fan of going tight, IMO but to each his own.
I haven't had issues in the .016-.018 range for my daily drivers and ran .002 on the Road Race b16 & it loved it. Then again, i had a '90 b20a prelude that ran 380k before blowing a head gasket then spinning a bearing at 450k & a '91 d16 that threw a rod at 80k both at stock clearances. If its going to go, it's going to go.
I haven't had issues in the .016-.018 range for my daily drivers and ran .002 on the Road Race b16 & it loved it. Then again, i had a '90 b20a prelude that ran 380k before blowing a head gasket then spinning a bearing at 450k & a '91 d16 that threw a rod at 80k both at stock clearances. If its going to go, it's going to go.
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Re: main bearing clearance?
its definately on the tightest side of what i would do. i recently had a motor that had a main at .0014 and after about 3000 miles that bearing was showing considerably more wear than others. my mains are currently at .0018-.0021 with about 1500miles of 475 hp. no issues
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#8
Re: main bearing clearance?
Is .038mm wider then .025? If your running acl bearings its always alittle tighter from what I have read. My tuner told me to get the crank micro polished to open up the main and rods plus it will be nice to have a nice smooth surface
From a mathatical stand point isnt .038 larger then .025? Am i just thinking of this way to hard and should be thinking like 16 gage steel is larger then 20 gage?
From a mathatical stand point isnt .038 larger then .025? Am i just thinking of this way to hard and should be thinking like 16 gage steel is larger then 20 gage?
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Re: main bearing clearance?
the factory range is .0012-.0017 and when using green plastigauge that only has a scale for .001,.0015, .002,.003 your making a logical guess when they fall between sizes. Most motors I have built fall under the .0015 range so it make it between the 0015 -.002 and you will be fine with that
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Re: main bearing clearance?
Keep the bottom end clearances on the LOOSEr side, this ***** is gunna get hot! Get sum thick oil too talkin like 5w-40, hope that helps you can do the math.
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