Clearances for built engine
#1
Clearances for built engine
I'm on the process of rebuilding my engine and I'd like to be sure of the clearances I should shoot for before start the machining.
I'll use JE Buschur spec 86mm pistons, Oliver rods, stock crank and ACL racing bearings. Considering 0W50 synthetic oil, I have these clearances in mind:
Piston to Wall: 0,004
Ring Gap Clearance: 0,013
Rod to Pin Clearance: 0,013
Rod Bearing Clearance: 0,004
Main Bearing Clearance: 0,001
Thrust Crank Clearance: ?
Sorry if it's been covered before. I couldn't find a topic covering all the clearances at once.
I'll use JE Buschur spec 86mm pistons, Oliver rods, stock crank and ACL racing bearings. Considering 0W50 synthetic oil, I have these clearances in mind:
Piston to Wall: 0,004
Ring Gap Clearance: 0,013
Rod to Pin Clearance: 0,013
Rod Bearing Clearance: 0,004
Main Bearing Clearance: 0,001
Thrust Crank Clearance: ?
Sorry if it's been covered before. I couldn't find a topic covering all the clearances at once.
#2
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i'm not to sure what the rod bearing clearances on our engines are, but on my Honda that I built last year I had it at .0012...... I think, I really wish I could find the build sheet I had to do for class dammit
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I'm on the process of rebuilding my engine and I'd like to be sure of the clearances I should shoot for before start the machining.
I'll use JE Buschur spec 86mm pistons, Oliver rods, stock crank and ACL racing bearings. Considering 0W50 synthetic oil, I have these clearances in mind:
Piston to Wall: 0,004
Ring Gap Clearance: 0,013
Rod to Pin Clearance: 0,013
Rod Bearing Clearance: 0,004
Main Bearing Clearance: 0,001
Thrust Crank Clearance: ?
Sorry if it's been covered before. I couldn't find a topic covering all the clearances at once.
I'll use JE Buschur spec 86mm pistons, Oliver rods, stock crank and ACL racing bearings. Considering 0W50 synthetic oil, I have these clearances in mind:
Piston to Wall: 0,004
Ring Gap Clearance: 0,013
Rod to Pin Clearance: 0,013
Rod Bearing Clearance: 0,004
Main Bearing Clearance: 0,001
Thrust Crank Clearance: ?
Sorry if it's been covered before. I couldn't find a topic covering all the clearances at once.
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I'm on the process of rebuilding my engine and I'd like to be sure of the clearances I should shoot for before start the machining.
I'll use JE Buschur spec 86mm pistons, Oliver rods, stock crank and ACL racing bearings. Considering 0W50 synthetic oil, I have these clearances in mind:
Piston to Wall: 0,004
Ring Gap Clearance: 0,013
Rod to Pin Clearance: 0,013
Rod Bearing Clearance: 0,004
Main Bearing Clearance: 0,001
Thrust Crank Clearance: ?
Sorry if it's been covered before. I couldn't find a topic covering all the clearances at once.
I'll use JE Buschur spec 86mm pistons, Oliver rods, stock crank and ACL racing bearings. Considering 0W50 synthetic oil, I have these clearances in mind:
Piston to Wall: 0,004
Ring Gap Clearance: 0,013
Rod to Pin Clearance: 0,013
Rod Bearing Clearance: 0,004
Main Bearing Clearance: 0,001
Thrust Crank Clearance: ?
Sorry if it's been covered before. I couldn't find a topic covering all the clearances at once.
first question how much boost? 25+35+ all depends
second what rpm
third what will the motor be used for? drag,RR
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Not to nitpick, but factory build specs allow for up to .0098 on crank thrust. I can't remember what the low limit is. I am speaking original build, not the "what we'll warranty" limit.
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.021 is LOOSE for anything but an all out nitrous application according to the JE ring chart. I'm shooting for around 450 HP with mine, setting me into the middle turbo/ nitrous category. that recommends .005 * bore (inches) for the top ring and .0055 * bore for the second ring.
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ok, so the clearance sheets that come with the pistons are pretty general, what criteria effect what these clearances should be ,and how do you determine what your final #s are going to be for your application?
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