rod bearing clearance

H

humaxxx

Member

May 2, 2007

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Jun 26, 2008

#1

• Jun 26, 2008

• #1

Hello,

I have a question about the rod bearing clearance.

I have:
- a 460 Siamese bore engine stroked to a 514ci. (0.080 overbore)
- aluminium rods from manley
- castrol R40 oil

Can somebody tell me what the clearance should be of the rod bearing.

Car is for dragrace

greetings

Freek (from Holland)

 

rbohm

Founding Member

Apr 12, 2002

6,698

550

204

tucson,az

Jun 26, 2008

#2

• Jun 26, 2008

• #2

humaxxx said:

Hello,

I have a question about the rod bearing clearance.

I have:
- a 460 Siamese bore engine stroked to a 514ci. (0.080 overbore)
- aluminium rods from manley
- castrol R40 oil

Can somebody tell me what the clearance should be of the rod bearing.

Car is for dragrace

greetings

Freek (from Holland)

Click to expand...

i like my bearing clearances for drag racing to be around .002-.0025, and no more than .003. i know some will tell you that sounds a bit loose, and for most street or race engines it is a bit loose, but on a drag engine you want it a bit loose, and you want to freshen the engine up a couple of times during the season.

 

H

humaxxx

Member

May 2, 2007

35

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6

Jun 26, 2008

#3

• Jun 26, 2008

• #3

thanks

 

H

humaxxx

Member

May 2, 2007

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Jun 27, 2008

#4

• Jun 27, 2008

• #4

can somebody tell me what the clearance is of the main bearings with the same set up!!

 

rbohm

Founding Member

Apr 12, 2002

6,698

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tucson,az

Jun 27, 2008

#5

• Jun 27, 2008

• #5

same with the main bearings.

 

H

humaxxx

Member

May 2, 2007

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0

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Jun 27, 2008

#6

• Jun 27, 2008

• #6

hello,


My big end (chevy 2.200) of the crank from my 514ci Ford has to be polished. I have oderd the following undersize beaings 0.010!!

http://store.summitracing.com/partdetail.asp?part=CLE-CB743HDK10&autoview=sku

I want to have a clearance of the rod bearing between 0.002 and 0.0025

What must be the diameter of the big end of the crank??

I think between 2.200 - 0.010 - 0.002 = 2.188 and 2.200 - 0.010 - 0.0025 = 2.1875

I am right!!!!!!!!!!

greetings

Freek (from Holland)

 

H

humaxxx

Member

May 2, 2007

35

0

6

Jun 28, 2008

#7

• Jun 28, 2008

• #7

nobody????

 

woodsnake

15 Year Member

Jan 16, 2007

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Hicksville, NY

Jun 28, 2008

#8

• Jun 28, 2008

• #8

Just make sure your machine shop knows this, and you should be fine.

 

V

v8xploder

New Member

Jul 30, 2003

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currentlu in laramie wy, soon to be back in soiux

Jul 11, 2008

#9

• Jul 11, 2008

• #9

remember with bigger clearances to get a high volume/high pressure pump. Im running .003 on my rods/mains in my 532 that Im spinning at 7000RPM and i have a stage 1 pump from hyflowdynamics. Good luck!