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Precombustion chambers

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1 month 3 weeks ago #231170 by Catboy1
Could someone please tell me what models these precombustion chambers fit? I can’t find part numbers on them and I have a few of each I’d like to sell. Thank you guys for all your help,

Robyn
  1 2 2 3 3
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1 month 3 weeks ago #231192 by Old Magnet
Replied by Old Magnet on topic Precombustion chambers
Supply thread diameter and tpi...that may help identify.

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1 month 3 weeks ago #231195 by Rome K/G
Replied by Rome K/G on topic Precombustion chambers
tpi is threads per inch Robyn.

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1 month 3 weeks ago #231214 by Catboy1
Replied by Catboy1 on topic Precombustion chambers
Okay, here are the measurements:
1- diameter .981, tpi 12
2- diameter 1.112, tpi 12
3- diameter 1.215, tpi 12

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1 month 2 weeks ago #231227 by Old Magnet
Replied by Old Magnet on topic Precombustion chambers
Best guess is the O.981 (1" nominal) is for early D2
The 1.112 (1-1/8" nominal) is for early D4, D6.
The 1.215 (1-1/4" nominal) I'm not sure of application but if a 1-1/2' hex head fits it's for the early 5-3/4 or 5-1/4  bore engines.

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1 month 2 weeks ago #231228 by Catboy1
Replied by Catboy1 on topic Precombustion chambers
thank you, Old Magnate.

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1 month 2 weeks ago #231229 by Catboy1
Replied by Catboy1 on topic Precombustion chambers
Magnet, darn auto correct.

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1 month 2 weeks ago #231230 by edb
Replied by edb on topic Precombustion chambers
Hi Robyn,
I do have the scans below but that is all at present.
Orifice sizes are critical to application and the scan of the D311, D315 and D318 diameters given are likely to be for the body size--I am unsure what they are actually referring to be honest but thought they may assist you in your quest.
Good Luck.
Cheers,
Eddie B.
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