Performance Distributors reworked Duraspark dizzy
Thread Starter
|
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
Performance Distributors reworked Duraspark dizzy
Well I was kicking around Summit's website with money burning a hole in my pocket and picked up a Duraspark distributor from Performance Distributors. They're the same folks who sell those snazzy DUI dizzys.
They replace the bearings with a nice, tight bushing then recurve it - 22 degrees all in at 3,000 rpm in this case. There is absolutely no wiggle in the shaft and it spins smoothly. You can tell they put some care into its assembly.
The remanufactured dizzy I had came from one of the big retailers, NAPA probably. It was curved to 26 degrees (the least I could get with the slots on the shaft, the other notch was 32, I think) all in at 3,500. When I pulled it and checked the shaft it didn't have too much wiggle but it feels like it catches or drags a little bit when the reluctor passes the pickup.
The new piece made a huge difference. The old one wasn't off much either. The truck ran pretty well. It just runs so much better now. With 2 degrees less base timing, 12 now. I didn't fool with it after that but want to try 10 and see how that works. It's pulling 21-22" at idle now.
Money well spent, I recommend it.
They replace the bearings with a nice, tight bushing then recurve it - 22 degrees all in at 3,000 rpm in this case. There is absolutely no wiggle in the shaft and it spins smoothly. You can tell they put some care into its assembly.
The remanufactured dizzy I had came from one of the big retailers, NAPA probably. It was curved to 26 degrees (the least I could get with the slots on the shaft, the other notch was 32, I think) all in at 3,500. When I pulled it and checked the shaft it didn't have too much wiggle but it feels like it catches or drags a little bit when the reluctor passes the pickup.
The new piece made a huge difference. The old one wasn't off much either. The truck ran pretty well. It just runs so much better now. With 2 degrees less base timing, 12 now. I didn't fool with it after that but want to try 10 and see how that works. It's pulling 21-22" at idle now.
Money well spent, I recommend it.
Thread Starter
|
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
Tuned
Joined: Sep 2012
Posts: 367
Likes: 2
From: summerfield florida
Here's a link: http://www.summitracing.com/parts/du...view/make/ford
Thread Starter
|
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
Had a little time to play around this weekend. I cleaned up old set of fancy blue 8.5mm plug wires, trimmed them to fit and installed new straight terminals on the distributor end. Dunno that it helps anything but they look spiffy.
Then busted out the timing light and rechecked the timing. My eyes were off last weekend - it was set at 15 degrees BTDC. I thought it was set ~12-13. Took it back down to 10 degrees and there's no sign of any hesitation. It felt lazy with less than 14 degrees before. Didn't hook up a tach but the idle feels 50-75 rpm lower with the timing dialed back. The throttle feels crisper all through the rpm range.
Then busted out the timing light and rechecked the timing. My eyes were off last weekend - it was set at 15 degrees BTDC. I thought it was set ~12-13. Took it back down to 10 degrees and there's no sign of any hesitation. It felt lazy with less than 14 degrees before. Didn't hook up a tach but the idle feels 50-75 rpm lower with the timing dialed back. The throttle feels crisper all through the rpm range.
Thread
Thread Starter
Forum
Replies
Last Post
himmelberg
1948 - 1956 F1, F100 & Larger F-Series Trucks
14
Jun 12, 2003 06:18 PM
