'58 250 HP FI Vacuum Line
How does the line from the distributor tie-in to the vacuum line from the fuel injection dog house to the vacuum bottle?
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Re: '58 250 HP FI Vacuum Line
Marvin, I see you haven't gotten a reply. The '58 Aims I have is a very poor copy. I don't think there is much in the Aims to help you with this question. Maybe the '58 guru's will chirp in.
The '915 distributor vacuum advance is connected to the air meter via a 45 degree plus or minus 5 sided fitting. A one piece steel line is used. Probably the same line that was used on the LHP '57 FI running a '906 distributor. You didn't ask details about this line but I am giving the info to see how it flies with others.
Don Baker and I saw an origianl unmolested '59 LHP FI Corvette for sale at Corvette Carlisle a few years ago. It was only K row. We were really interested in seeing the fittings and how the distributor VA was hooked up. It had the same info as I supplied to you above as far as the vacuum line goes.
When you say vacuum bottle I assume you are referring to the W/S washer bottle but not sure. If you are then the answer is the rubber hose goes to a fitting on the plenum above the bellcrank. There is a 1/4" pipe thread there above the bellcrank. If you did not have a W/S washer then the fitting = recessed hex head plug.
Question is what fitting should be used in that plenum. There is where the '58 aims helps out. If you look closely you will see a part number listed for this fitting.
Too bad the '58 aims and also the '59 aims features a '4360 FI unit as that makes it difficult for guys trying to learn this trivia.
Anyhow the part number of the fitting means that it's a hex head plug with a 90 degree tube soldered into the center of this fitting. I don't know if anyone reproduces this or not. Plan B would use a typical W/S washer fitting that is readily available.
Say your car had an automatic transmission. It would require a vacuum take off fromt he distributor to air meter line.
Now here is where I am stuck. I think if you had an automatic you would not use a steel line. You would use a rubber hose that had a "T" fitting in it around the center of the back side of the plenum. The rubber hose would go from the VA to the air meter. the "T" fitting would be there for the automatic tranny.
But I really would like someone who knows or has an original car to clarify this.
Just remembered that your team leader, Tim Mickey, may know of such a car. John
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