Re: Clearances
[Re: beepbeepdon]
#1245784
06/05/12 02:27 PM
06/05/12 02:27 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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on my 408 Terry set the clearances at .0030-mains,,,.0028 on the eagle rod's, so you are pretty close in my opinion.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Clearances
[Re: beepbeepdon]
#1245786
06/05/12 02:48 PM
06/05/12 02:48 PM
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Joined: Aug 2003
Posts: 43,219
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,219
Bend,OR USA
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Quote:
Loose or tight?......Any opinions?
main bearing clearances .00275
rod bearing clearances .00250
That is tight in my opinion, tighter than I like to use in a race only motor  If you used a thin oil,5W20 or zero weight, you'll probally be fine with those clearances, make sure you have some heat in the oil before racing it though  I like to have between .003 to .004 on the mains and .003+ on the rods using the 2.200 rod journal size, bigger on the stock Mopar rod sizes, 2.375  I use 5W20 or 5W30 wt. oil only in all of my motors now, street or race only
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Clearances
[Re: Cab_Burge]
#1245788
06/05/12 03:48 PM
06/05/12 03:48 PM
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Joined: Oct 2008
Posts: 99
USA
BB Dart 69
member
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member
Joined: Oct 2008
Posts: 99
USA
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Quote:
Quote:
Loose or tight?......Any opinions?
main bearing clearances .00275
rod bearing clearances .00250
That is tight in my opinion, tighter than I like to use in a race only motor If you used a thin oil,5W20 or zero weight, you'll probally be fine with those clearances, make sure you have some heat in the oil before racing it though I like to have between .003 to .004 on the mains and .003+ on the rods using the 2.200 rod journal size, bigger on the stock Mopar rod sizes, 2.375 I use 5W20 or 5W30 wt. oil only in all of my motors now, street or race only
 I use 30wt oil,
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Re: Clearances
[Re: beepbeepdon]
#1245789
06/05/12 05:20 PM
06/05/12 05:20 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Loose or tight?......Any opinions?
main bearing clearances .00275
rod bearing clearances .00250
That almost exactly what my 416 clearances are...
I normally run .003 and .003 ... I wouldnt worry
about it... if you run heavy oil you'll see high
pressures
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Re: Clearances
[Re: BB Dart 69]
#1245793
06/05/12 07:01 PM
06/05/12 07:01 PM
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Joined: Aug 2003
Posts: 43,219
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,219
Bend,OR USA
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Quote:
Quote:
Quote:
Loose or tight?......Any opinions?
main bearing clearances .00275
rod bearing clearances .00250
That is tight in my opinion, tighter than I like to use in a race only motor If you used a thin oil,5W20 or zero weight, you'll probally be fine with those clearances, make sure you have some heat in the oil before racing it though I like to have between .003 to .004 on the mains and .003+ on the rods using the 2.200 rod journal size, bigger on the stock Mopar rod sizes, 2.375 I use 5W20 or 5W30 wt. oil only in all of my motors now, street or race only
I use 30wt oil,
I'll share a little information on oil wieght based on past dyno testing, motor #1 with 30 WT oil saw a ten HP increase in the oil temps being 130 F versus raising them to 160 F  Motor # two and later saw no HP or Torque differences with both 5W20 WT and 5W30 WT between 90 F and 200 F A ten HP change at the track can throw your dial off a bunch 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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