Rajo spark plugs
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Psainslie
Topic author - Posts: 44
- Joined: Sun Jan 27, 2019 8:13 pm
- First Name: Patrick
- Last Name: Ainslie
- * REQUIRED* Type and Year of Model Ts owned: 1911 & 1919
- Location: Bloomfield Hills, MI
Rajo spark plugs
I’m currently using Autolite 65 spark plugs in my Rajo head. I’m not that satisfied with my performance and plug life. They seem to foul easily, and wondered if someone had a plug that they liked? If anyone else used the Autolite 65 plug and liked their performance? Thanks Pat
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walber
- Posts: 239
- Joined: Sun Jan 06, 2019 12:55 pm
- First Name: Walt
- Last Name: Berdan
- * REQUIRED* Type and Year of Model Ts owned: '18 Speedster had 25 touring and 26 coupe
- Location: Bellevue, WA
Re: Rajo spark plugs
I rather expected on of the folks running RAJO heads would have replied but . . .
I had issues with my Fronty finding a good spark plug. Eventually settled on using a spark plug adapter for a Model A (18 mm) that lets me run modern 14 mm plugs. I've tried various plugs but am happiest with NGK BKR5EGP. Naturally carburetion and ignition changes make a lot of difference.
If your Rajo has the pipe thread spark plug holes like a Model T, you can get the T-5201-ADP adapters from Snyder's. If the head has the straight thread 18 mm like a Model A, get the A-12405-ADP adapters, likewise from Snyder's.
Good Luck, at least the 14 mm plugs are relatively cheap and come in various heat ranges.
Walt
I had issues with my Fronty finding a good spark plug. Eventually settled on using a spark plug adapter for a Model A (18 mm) that lets me run modern 14 mm plugs. I've tried various plugs but am happiest with NGK BKR5EGP. Naturally carburetion and ignition changes make a lot of difference.
If your Rajo has the pipe thread spark plug holes like a Model T, you can get the T-5201-ADP adapters from Snyder's. If the head has the straight thread 18 mm like a Model A, get the A-12405-ADP adapters, likewise from Snyder's.
Good Luck, at least the 14 mm plugs are relatively cheap and come in various heat ranges.
Walt
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DaveBarker
- Posts: 72
- Joined: Thu Jan 17, 2019 2:49 pm
- First Name: Dave
- Last Name: Barker
- * REQUIRED* Type and Year of Model Ts owned: 1919 Speedster
- Location: Fairport, New York
Re: Rajo spark plugs
Pat - I run Champion A25 plugs in my Rajo Model 30 head. Gapped at 0.035" I've had good success.
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