Main/rod oil clearance for built engine ?
#1
Main/rod oil clearance for built engine ?
Currently my car is at about 230ish whp. Im building up an engine to beable to run a few more psi and have a solid reliable 260ish whp. The car will see autocross and possibly a track day in the future.
ive seen mention of people runing .0020 oil clearance on both mains and rods which is past standard spec but only half of the .004 max spec. Is that something thats for a race engine only ? Id like to get 50k miles atleast out of this engine. Im not worried about oil pressure i have a BE Stage2+ pump ill be using.
is .0020 too much for a car that wont see alot of track time ? What do you guys suggest ?
ive seen mention of people runing .0020 oil clearance on both mains and rods which is past standard spec but only half of the .004 max spec. Is that something thats for a race engine only ? Id like to get 50k miles atleast out of this engine. Im not worried about oil pressure i have a BE Stage2+ pump ill be using.
is .0020 too much for a car that wont see alot of track time ? What do you guys suggest ?
#3
Cpt. Slow
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I think the idea is that with the extra heat generated at the track, expansion doesn't close your .001-.0015 gap to next to nothing, potentially starving your bearings of oil. That being said, I've built a number of engines at .0015, with no issues. Don't have any 260hp track cars running around with my engines though.
#4
I think the idea is that with the extra heat generated at the track, expansion doesn't close your .001-.0015 gap to next to nothing, potentially starving your bearings of oil. That being said, I've built a number of engines at .0015, with no issues. Don't have any 260hp track cars running around with my engines though.
#10
You would end up with one radius that does not fit the crank. It would be a tiny amount, but it would not be sitting wholly on the crank.
Who build engines like this? Have I missed something?
EDIT: I have been informed by multiple sources that this is in fact, common practice. I never knew that.
Who build engines like this? Have I missed something?
EDIT: I have been informed by multiple sources that this is in fact, common practice. I never knew that.
Last edited by ryansmoneypit; 02-15-2017 at 05:04 PM.
#11
Cpt. Slow
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They're not matched in the packaging, just thrown in there. Once they're run into the crank, no, you can't mix and match. Did that once, locked the crank. Or is that what we're talking about?
#13
Former Vendor
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You would end up with one radius that does not fit the crank. It would be a tiny amount, but it would not be sitting wholly on the crank.
Who build engines like this? Have I missed something?
EDIT: I have been informed by multiple sources that this is in fact, common practice. I never knew that.
Who build engines like this? Have I missed something?
EDIT: I have been informed by multiple sources that this is in fact, common practice. I never knew that.