Spark Control Solenoid

[dlrshort]

Hi, I am having trouble finding a Spark Control Solenoid for my 1971 LT-1. There was an incorrect carborator on the car when I bought it and the correct one is on but we're having a problem locating this part. Any one have any ideas. I have checked some online parts people and a local GM Dealer. I was told it was a GM only part by Zip Products.

Thanks for any help you can give.

dlrshort

[dlrshort]

Here I am following up my own thread. A GM parts dealer told me that the part is available for both a 70 and 72 LT-1. Would any one of you know if it could be used on the 71? I wouldn't think it could.

dlrshort

[Tom Bryant]

Hi Dave,

I'm confused on this too. I'm looking in a Sept '75 Corvette parts book and they don't list a solonoid for the '71 either. Just the '70 and '72. They are different numbers btw.I will have to check futher tomorrow to see if I can come up with a '71 emmissions illustration. I also have a '72 parts book in the archives I could dig out.

Tom

[dlrshort]

Thanks, Tom that would be much appreciated.

Dave

[Tom Bryant]

Well I can't find an illustration of the system in any of my old parts books. Still can't find a listing for a '71 solenoid either. Maybe it was a combination solenoid with the idle sol or something. Does your car still have the emmisions vacuun hose routing decal on it? If so does it shouw a spark control solonoid?

I don't recall these ever being offered by the aftermarket and finding a new one will be tough. I think you are going to have to find another '71 4 speed owner with all this stuff in place to see just what it looks like ect.

Tom

[dlrshort]

Tom the car is at my mechanics, but I don't remember seeing the decal. He has some ideas on how to work without the valve. I was wondering if any LT-1 owners in the forum could take time to look at their configuration and let me know what they've got.

Dave S.
dlrshort

[Tom Bryant]

Dave,

If you are not trying to put all of this stuff back on for NCRS judging I wouldn't worry about it. The TSC solenoid was operated by a transmission switch that opened the the vacuum port to the distributor only in 4th gear. They were commonly bypassed when these cars were new. You don't really need it.

Tom

[dlrshort]

Thanks, Tom, that was what I was hoping to find out.

Dave