View Poll Results: which bearings for 600whp
ACL
6
60.00%
Cosworth
4
40.00%
Voters: 10. You may not vote on this poll
ACL or Cosworth ??
03-27-2012, 07:22 PM
#1
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ACL or Cosworth ??
To start I did search for a little and didnt find jack.
My question is , which bearings are better ACL or Cosworth? I'm shooting for 600WHP.
I spun 2 mains on my old block and those were ACL bearings.
Should I stick to ACL or pay almost double the price and get Cosworth ?
My question is , which bearings are better ACL or Cosworth? I'm shooting for 600WHP.
I spun 2 mains on my old block and those were ACL bearings.
Should I stick to ACL or pay almost double the price and get Cosworth ?
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03-28-2012, 12:46 PM
#8
I really don't know but I feel confident in saying that the root cause of bearing failures is going to be a "simple" lack of lubrication, rather than part selection.
Was it you that started the thread about bearing clearances recently? That's probably a factor along with oil pump pressure and maybe even the lube hole size in the journal.
I'd love to hear conclusive evidence that "Cosworth never fails" but I'd be doubtful.
Was it you that started the thread about bearing clearances recently? That's probably a factor along with oil pump pressure and maybe even the lube hole size in the journal.
I'd love to hear conclusive evidence that "Cosworth never fails" but I'd be doubtful.
03-28-2012, 01:00 PM
#9
I'm not an engine builder but I'd agree with DJ. I think they are probably both fine products... My invoice stated Cosworth bearings fwiw, now nearing 30k miles.
EDIT: Not sure this is of help, but it was in my past readings. Good luck!
http://www.spridgetguru.com/TA0027_f...aringsFail.pdf
EDIT: Not sure this is of help, but it was in my past readings. Good luck!
http://www.spridgetguru.com/TA0027_f...aringsFail.pdf
Last edited by rcdash; 03-28-2012 at 01:23 PM.
03-28-2012, 01:54 PM
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for some reason, i think the machine shop that coated my crank also elongated the oil passage holes on the crank for the bearings to get better lubrication. i think they did anyway. either way, i went with coated acl race bearings, but i only have about 1000 miles on my new engine.
voted acl here
voted acl here
Last edited by mgrotel; 03-28-2012 at 01:55 PM.
03-28-2012, 07:46 PM
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I really don't know but I feel confident in saying that the root cause of bearing failures is going to be a "simple" lack of lubrication, rather than part selection.
Was it you that started the thread about bearing clearances recently? That's probably a factor along with oil pump pressure and maybe even the lube hole size in the journal.
I'd love to hear conclusive evidence that "Cosworth never fails" but I'd be doubtful.
Was it you that started the thread about bearing clearances recently? That's probably a factor along with oil pump pressure and maybe even the lube hole size in the journal.
I'd love to hear conclusive evidence that "Cosworth never fails" but I'd be doubtful.
I know at least 3 STIs that spun cosworth bearings within 4k miles, I just dont know if they are worth the extra money or not.
I'm not an engine builder but I'd agree with DJ. I think they are probably both fine products... My invoice stated Cosworth bearings fwiw, now nearing 30k miles.
EDIT: Not sure this is of help, but it was in my past readings. Good luck!
http://www.spridgetguru.com/TA0027_f...aringsFail.pdf
EDIT: Not sure this is of help, but it was in my past readings. Good luck!
http://www.spridgetguru.com/TA0027_f...aringsFail.pdf
for some reason, i think the machine shop that coated my crank also elongated the oil passage holes on the crank for the bearings to get better lubrication. i think they did anyway. either way, i went with coated acl race bearings, but i only have about 1000 miles on my new engine.
voted acl here
voted acl here
I have heard good things about both. I would go with the others and say most bearing "issues" are not bearing failures but other contributing factors.
03-29-2012, 08:38 AM
#14
^Poor cass, eh!
When you consider that the part was designed for trillions of cycles, if it fails after a few months, something else must be at play unless they have a bad QC program that fails to identify their faulty product. Maybe their web site outlines something that makes you feel better.
For example, have you been to ARP's site? Their explanations are amazing, detailed and impressive! I personally think that their L19's are overkill for all but the most extreme builds, but I have no doubt that those studs are far superior after looking into it. They have put the time in to try and justify the substantial premium that you pay for their best parts and I respect that.
When you consider that the part was designed for trillions of cycles, if it fails after a few months, something else must be at play unless they have a bad QC program that fails to identify their faulty product. Maybe their web site outlines something that makes you feel better.
For example, have you been to ARP's site? Their explanations are amazing, detailed and impressive! I personally think that their L19's are overkill for all but the most extreme builds, but I have no doubt that those studs are far superior after looking into it. They have put the time in to try and justify the substantial premium that you pay for their best parts and I respect that.
03-29-2012, 10:05 AM
#15
Worry more about who machines and builds the engine. If it's 100% proper the bearings won't matter. for fack's sake it's just a strip of metal and oil [is supposed to] bear the load...
great link rcdash!
Last edited by djamps; 03-29-2012 at 10:15 AM.
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