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PostPosted: Tue May 27, 2025 7:52 pm 
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3 Deuce Weber
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Joined: Thu Oct 21, 2021 8:14 pm
Posts: 68
Location: Tennessee
Car Model: Mazda RX8 slant six swap
I am moving along slowly with my slant project. The engine is out of a 1984? D150 pickup. The old timing chain sprocket was one of the non-metalic ones and it had a lot of wear. I am replacing it with a Rollmaster set that has the keyways to adjust cam timing. It seems that I heard that the stock cams were retarded a few degrees when they are set dot to dot. Should I set the cam back dot to dot or should I advance it to counteract the factory setting? How can I degree the stock cam? I am leaving the stock cam in until I have the time to pull the engine back out and rebuild it, hoping to port the head and up the compressin a bit. Thank you.


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PostPosted: Wed May 28, 2025 3:53 am 
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You do it the same way you would do it if it was a new cam. You can't just line up the dots on anything. That is a huge risk. Also the rollmaster gear is extremely tight on the crankshaft and may need the inside diameter "dressed" a little. I and others have had to cut some off the back of the crank sprocket to get proper line up with the top gear too. Can't remember the exact amount but I think it was about .060. I can try and find it for you later.

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PostPosted: Wed May 28, 2025 6:33 pm 
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3 Deuce Weber
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Joined: Thu Oct 21, 2021 8:14 pm
Posts: 68
Location: Tennessee
Car Model: Mazda RX8 slant six swap
Where do I find the specs for a stock cam


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PostPosted: Sun Jun 01, 2025 1:01 pm 
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Triple Duece Weber
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Location: Desoto Texas
Car Model: 1972 Dodge Colt
Factory Service Manual.
What are the details on the engine?
I might have what you need.

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PostPosted: Thu Jun 26, 2025 7:30 pm 
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3 Deuce Weber
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Joined: Thu Oct 21, 2021 8:14 pm
Posts: 68
Location: Tennessee
Car Model: Mazda RX8 slant six swap
It is a 1985 D150.


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