Recurving distributor on 460
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Recurving distributor on 460
What should I set my total ignition timing to? The article Dennis referred me to makes no mention of 460 engines.
I have a stock 1976 460. Block is D1VE, heads are D5's...
I am looking to pickup power, and heard stories from the 60's of dealers cranking out noticeable power just by recurving the distributor.
Thanks!
Mark
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=5362&.jpg
Ford started it; Ford will finish it!
I have a stock 1976 460. Block is D1VE, heads are D5's...
I am looking to pickup power, and heard stories from the 60's of dealers cranking out noticeable power just by recurving the distributor.
Thanks!
Mark
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=5362&.jpg
Ford started it; Ford will finish it!
Thread Starter
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Postmaster
Joined: Aug 2001
Posts: 2,882
Likes: 0
From: Nevada
Recurving distributor on 460
That's a '71 block with '75 heads, probably about 8.0:1 compression ratio, so there's not a whole lot you can do to improve performance without getting the c/r up.
To answer your question, the best way is to find somebody with a distributor analysis machine that will spin the distributor to 5,000RPM. Tell them what RPMs you want the advance to come in at and what total advance you want at a particular RPM. They'll change/cut the springs accordingly.
Example:
If you have a mild RV cam in a truck with a torque range of 1500-3,500rpm, you'd normally have 10 degrees advance at the timing mark and want an additional 26 degrees from the distributor at 1200-2500rpm for a total of 36 degrees all in at 2500rpm.
Every engine is different and the total degrees required depends on cam, C/R, stall converter, weight and rear end ratio. See a pro for determing what you need. Usually costs about $65.
Or, you can drive yourself crazy changing springs in the distributor and using a timing light that will read initial and total degrees of timing.
To answer your question, the best way is to find somebody with a distributor analysis machine that will spin the distributor to 5,000RPM. Tell them what RPMs you want the advance to come in at and what total advance you want at a particular RPM. They'll change/cut the springs accordingly.
Example:
If you have a mild RV cam in a truck with a torque range of 1500-3,500rpm, you'd normally have 10 degrees advance at the timing mark and want an additional 26 degrees from the distributor at 1200-2500rpm for a total of 36 degrees all in at 2500rpm.
Every engine is different and the total degrees required depends on cam, C/R, stall converter, weight and rear end ratio. See a pro for determing what you need. Usually costs about $65.
Or, you can drive yourself crazy changing springs in the distributor and using a timing light that will read initial and total degrees of timing.
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