Why Does No One Like The Bosch 009 Distributor?
- veedublover12
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Why Does No One Like The Bosch 009 Distributor?
I have heard a lot of people complain about the Bosch 009. Why is this? I have used it for years on both my Bus and my brothers have used it in their Bugs and Ghia's with no problems. I am willing to change my ways I just want to know why I should.
Isaac T.
Love & Good Road
Love & Good Road
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- Adventurewagen
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Welcome to the board.
I'm going to keep it real simple and let one of the ultra guru's explain exactly why.
The 009 is a centrifugal advance distributor. It advances along with RPM's but, your engine also produces a vacuum signal and if you could take advantage of that you could have a distributor that is also based on load. So that's why VW put distributors that were both centrifugal and vacuum advance with the bus when you originally got it. It helps during acceleration and gives your engine more total advance overall. The advance curve it generates is also better suited for your engine while a 009's isn't advanced enough and overall doesn't have enough total advance.
So while the 009 works, it isn't taking advantage of everything it could from the engine. So if you want to possibly run cooler, have smoother acceleration, get better gas mileage and probably out perform your brothers, you should upgrade from the 009 and get either a stock distributor with the vacuum advance or go with the ACN SVDA which is the same thing just new.
I'm going to keep it real simple and let one of the ultra guru's explain exactly why.
The 009 is a centrifugal advance distributor. It advances along with RPM's but, your engine also produces a vacuum signal and if you could take advantage of that you could have a distributor that is also based on load. So that's why VW put distributors that were both centrifugal and vacuum advance with the bus when you originally got it. It helps during acceleration and gives your engine more total advance overall. The advance curve it generates is also better suited for your engine while a 009's isn't advanced enough and overall doesn't have enough total advance.
So while the 009 works, it isn't taking advantage of everything it could from the engine. So if you want to possibly run cooler, have smoother acceleration, get better gas mileage and probably out perform your brothers, you should upgrade from the 009 and get either a stock distributor with the vacuum advance or go with the ACN SVDA which is the same thing just new.
63 Gulf Blue Notch
71 Sierra Yellow Adventurewagen
71 Sierra Yellow Adventurewagen
DjEep wrote:Velo? Are you being "over-run"? Do you need to swim through a sea of Mexican anchor-babies to get to your bus in the morning?
- veedublover12
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CIP1 will sell you an SVDA. John Connelly at aircooled.net will ask what it will be used in and sell you an SVDA specifically for that vehicle. Advance curve for a 1500 pound dune buggy is different than the advance curve our heavy buses want.
The vacuum part of the advance comes into play at part throttle actually. Such as cruising at a steady 60-65 on the highway. This is where the fuel economy comes in. You need less throttle to maintain speed. The vacuum signal goes away when you open the throttle wide, when under load such as climbing a hill or accelerating. This reduces ping or detonation.
SVDA is a good thing. The 009 that I used to run in my buggy, with a Compufire, is now my loaded spare distributor that I carry on road trips.
Bill
The vacuum part of the advance comes into play at part throttle actually. Such as cruising at a steady 60-65 on the highway. This is where the fuel economy comes in. You need less throttle to maintain speed. The vacuum signal goes away when you open the throttle wide, when under load such as climbing a hill or accelerating. This reduces ping or detonation.
SVDA is a good thing. The 009 that I used to run in my buggy, with a Compufire, is now my loaded spare distributor that I carry on road trips.
Bill
1/20/2013 end of an error
never owned a gun. have fired a few.
never owned a gun. have fired a few.
- Adventurewagen
- IAC Addict!
- Location: Seattle
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Also take a look at this thread:
Mallory vs SVDA
Like Vdubyah mentioned Air Cooled Net (http://www.aircooled.net/) sells a vacuum advance distributor that is considered among many to be the best stock type distributor you can get for your bus. Although another option is to go with the electronic Mallory unit.
I should note though that both the ACN SVDA and the Mallory come with vacuum advance. So no matter which one you get, both come with vacuum advance which should give you a bit more insight into what is "best" for the bus.
Mallory vs SVDA
Like Vdubyah mentioned Air Cooled Net (http://www.aircooled.net/) sells a vacuum advance distributor that is considered among many to be the best stock type distributor you can get for your bus. Although another option is to go with the electronic Mallory unit.
I should note though that both the ACN SVDA and the Mallory come with vacuum advance. So no matter which one you get, both come with vacuum advance which should give you a bit more insight into what is "best" for the bus.
63 Gulf Blue Notch
71 Sierra Yellow Adventurewagen
71 Sierra Yellow Adventurewagen
DjEep wrote:Velo? Are you being "over-run"? Do you need to swim through a sea of Mexican anchor-babies to get to your bus in the morning?
- RSorak 71Westy
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Vacuum advance is simply a good thing and all engines will run more efficiently with it. Most car engines have had this since about 1960, why VW chose not to use it is a complete mystery to me.
Take care,
Rick
Stock 1600 w/dual Solex 34's and header. mildly ported heads and EMPI elephant's feet. SVDA W/pertronix. 73 Thing has been sold. BTW I am a pro wrench have been fixing cars for living for over 30 yrs.
Rick
Stock 1600 w/dual Solex 34's and header. mildly ported heads and EMPI elephant's feet. SVDA W/pertronix. 73 Thing has been sold. BTW I am a pro wrench have been fixing cars for living for over 30 yrs.
- Amskeptic
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VW used vacuum-only from early 60's to 1970! Unmystify yourself young RSorak. . . .RSorak 71Westy wrote:Vacuum advance is simply a good thing and all engines will run more efficiently with it. Most car engines have had this since about 1960, why VW chose not to use it is a complete mystery to me.
Colin
BobD - 78 Bus . . . 112,730 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
Chloe - 70 bus . . . 217,593 miles
Naranja - 77 Westy . . . 142,970 miles
Pluck - 1973 Squareback . . . . . . 55,600 miles
Alexus - 91 Lexus LS400 . . . 96,675 miles
- Randy in Maine
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- RSorak 71Westy
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I've been running a bruck for the past 6000 or so miles with no problems at all. The quality seems to be fine.
Take care,
Rick
Stock 1600 w/dual Solex 34's and header. mildly ported heads and EMPI elephant's feet. SVDA W/pertronix. 73 Thing has been sold. BTW I am a pro wrench have been fixing cars for living for over 30 yrs.
Rick
Stock 1600 w/dual Solex 34's and header. mildly ported heads and EMPI elephant's feet. SVDA W/pertronix. 73 Thing has been sold. BTW I am a pro wrench have been fixing cars for living for over 30 yrs.
- karl
- Getting Hooked!
- Location: Coos Bay, Oregon
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And that was why the 009 came out. On the early distributors, they were vacuum only. When the diaphragm ruptured, you had zilch zip nada advance. Your VW was a turd going nowhere slow. Bad for the engine, all you did was lug it. So some enterprising person put together the 009 from industrial applications and the blue coil and marketed it as The Screamer Kit. Sure it made your engine scream: you went from no advance to 30 degrees advance. You did not miss the vacuum advance because it died slowly. If it died all at once, then you would have noticed the day and night lack of power.Amskeptic wrote:VW used vacuum-only from early 60's to 1970!RSorak 71Westy wrote:Vacuum advance is simply a good thing and all engines will run more efficiently with it. Most car engines have had this since about 1960, why VW chose not to use it is a complete mystery to me.
Sure, it gave you full advance and woke up your engine via RPM's only, but it lacks the needed vacuum advance that is load controlled.
- spiffy
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If ya don't have the cabbage to spring for a new SVDA your choice of carb can greatly affect the "size" of the flat spot. If you are running an earlier carb (28 & 30 pict 1) then the flat spot isn't as noticable but the later carb's, especially the 34, you will have a flat spot from hell.
FWIW....
FWIW....
78 Riviera "Spiffy"
67 Riviera "Bill"
67 Riviera "Bill"