 Distributors. |
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| Keith914 |
 Jan 22 2017, 01:09 PM
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#1
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Member  Group: Members Posts: 248 Joined: 29-April 16 From: Laguna Beach, California 92651 Member No.: 19,948 Region Association: Southern California  |
There are varying recommendations on suitable distributors for our Type IV engines with carburetors. Some advocate use of the 009 centrifugal advance only units. There are well written recommendations from "Bubblehead" and from "air-cooled.net", both advocating/explaining why SVDA (single vacuum, dual advance distributor, -- has centrifugal and vacuum advance operating independently) are the correct type as they provide some advance at lower rpm's that eliminate hesitation from idle, and give better mpg.
Some manufacturers no longer make these SVDA distributors, but fortunately others make them, including Petronix model D186504. What does the "brain trust" say? |
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| jmill |
Jan 22 2017, 01:52 PM
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#2
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
The PerTronix is a clone of the Bosch 034. I couldn't find the total advance for either. The 009 is known for its flat spot. A good SVDA dizzy will eliminate that as long as you run a vacuum line. Apparently the 034 has the same mechanical advance as the 009. If the Pertronix has 30 degrees of advance like the 050 it may be a good option.
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| Mark Henry |
Jan 22 2017, 07:03 PM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
009 sucks on a T4 (IMG:style_emoticons/default/rolleyes.gif)
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| cgnj |
Jan 23 2017, 06:43 AM
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#4
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Senior Member Group: Members Posts: 623 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None 
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Hi,
You never said what you currently are running on you car. If I were starting from scratch I would look at 123ignition product. Fully programmable but expensive. I read a recent post that Jake used this distributor instead of the Unilite. Most of the distributors that are known are also NLA. My preference is unilite, 050, 034, stock 1.8 Carlos |
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| Keith914 |
Jan 23 2017, 04:34 PM
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#5
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Member Group: Members Posts: 248 Joined: 29-April 16 From: Laguna Beach, California 92651 Member No.: 19,948 Region Association: Southern California |
Ordered Petronix SVDA model D186504 Flame Thrower distributor to eliminate the flat spot from early acceleration from idle. Will report results
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| JamesM |
Jan 23 2017, 04:47 PM
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#6
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Senior Member Group: Members Posts: 1,888 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
Unless you want to stay 100% stock, or just be cheap, I dont know why anyone would go with anything other than fully programmable at this point.
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| Keith914 |
Jan 23 2017, 04:54 PM
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#7
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Member Group: Members Posts: 248 Joined: 29-April 16 From: Laguna Beach, California 92651 Member No.: 19,948 Region Association: Southern California |
Programable? Beyond my pay grade.
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| cgnj |
Jan 23 2017, 05:55 PM
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#8
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Senior Member Group: Members Posts: 623 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None
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Hi,
123 programable is over $500. That would get you more than halfway to megasquirt with spark and cop. Sill would have to tune. Keith, what cam is in this car? I run 163/86b. It doesn't go till 3k. Carlos |
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| Keith914 |
Jan 23 2017, 08:44 PM
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#9
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Member Group: Members Posts: 248 Joined: 29-April 16 From: Laguna Beach, California 92651 Member No.: 19,948 Region Association: Southern California |
I see I forgot to mention that I have a 009 flame thrower installed, so we will see what happens to the dead spot. My rebuilt engine was '72 1.7, and is now a 2.4 with twin Webers and a matching cam.
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| jmill |
Jan 24 2017, 09:24 AM
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#10
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
Webers also have a flat spot if the transition isn't right. It may be accompanied by a carb pop or just fall on its nose for a second.
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