Re: Set screw size for orifice in top of block BB.
[Re: VernMotor]
#1384117
02/10/13 02:22 AM
02/10/13 02:22 AM
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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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.242 is the drill size to tap for a 1/16 pipe plug (or letter bit C)... .332 is the drill size for a 1/8 pipe plug(or letter Q).... both of taps have a 27 threads per inch(1/16 and 1/8).. if its threaded now and you have a .270 it MIGHT be 1/16 NPT... that would be like .014 per side but since pipe is a taper it might be that much.... that could be what your looking at Jamie.... see if its a tapered hole
Last edited by MR_P_BODY; 02/10/13 02:25 AM.
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Re: Set screw size for orifice in top of block BB.
[Re: VernMotor]
#1384123
02/10/13 04:31 PM
02/10/13 04:31 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
Went to the hardware store bought some set screws. they are so hard I can't drill them !! LOL have to find some cheap ones..
Did the same thing last weekend. Bought 2 set screws, just as you did. Drilled through the first without any issue. 2nd one, no dice. They came from the same box at the hardware store. Went back and bought all they had. None of the rest were soft. Finally gave up and drilled through one of the hardened suckers. Took a hour and 3 bits, but finally got through.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Set screw size for orifice in top of block BB.
[Re: Von]
#1384124
02/11/13 03:44 AM
02/11/13 03:44 AM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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Quote:
Quote:
Went to the hardware store bought some set screws. they are so hard I can't drill them !! LOL have to find some cheap ones..
Did the same thing last weekend. Bought 2 set screws, just as you did. Drilled through the first without any issue. 2nd one, no dice. They came from the same box at the hardware store. Went back and bought all they had. None of the rest were soft. Finally gave up and drilled through one of the hardened suckers. Took a hour and 3 bits, but finally got through.
Two things, buy brass set screws to start with or deharden the steel ones by heating them up to cherry red(annealing them) and let them cool down to room temps. very slowly, or do you need to quench them in water to remove the temper or heat treating
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Set screw size for orifice in top of block BB.
[Re: VernMotor]
#1384125
02/11/13 04:25 AM
02/11/13 04:25 AM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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I've seen it suggested here in the past to put the restrictors in the oil passage in the heads rather than the block so if you decide to tune the oil supply to the heads it can be changed without pulling the heads...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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