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#2
09-12-2005, 04:06 PM
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Re: 70 LT-1 Vacuum Advance Solenoid
I can't tell where the hoses terminale. I assume the left one goes to the vacuum advance, the middle one to the carb vent and the right to manifold vacuum? What is the function of this solenoid?
Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's 69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD 69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth 
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#3
09-12-2005, 07:24 PM
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Re: 70 LT-1 Vacuum Advance Solenoid
You are correct in their location except the right hose goes to the carb vacuum port Paul...this solenoid activates and sends vacuum to the distributor in 3rd and 4th gear on a 4 sped...not sure on auto ....it's called a TCS solenoid...it was an emission thing I believe.
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 <span style="font-weight: bold"> (__{B}_____]]]]~~~~</span>Don't mess with old farts - age and treachery will always overcome youth and skill! Bullshit and brilliance only come with age and experience.
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#4
09-13-2005, 01:04 AM
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Re: 70 LT-1 Vacuum Advance Solenoid
I'm not sure that's the type solenoid you should have for a auto car. Yours should be on the Carb. It's a combination TCS CCS it has the hose that goes to the vacuum advance. On the auto cars you get vacuum in reverse and 3rd.
I've never owned a automatic car just read about the system when I was trying to get my TCS working on my 4 speed car. Jack
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Jack Seymour 1970 Z28 Hugger Orange 20K Mile Survivor
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#5
09-13-2005, 06:16 AM
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Re: 70 LT-1 Vacuum Advance Solenoid
Paul...I learned the vac line routing over at NastyZ28.com where Jack posted pics for everyone...you may want to stop over there and ask around unless someone around here can dig up the automatic version...
__________________
<span style="font-weight: bold"> (__{B}_____]]]]~~~~</span>Don't mess with old farts - age and treachery will always overcome youth and skill! Bullshit and brilliance only come with age and experience.
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#6
09-13-2005, 06:30 AM
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Re: 70 LT-1 Vacuum Advance Solenoid
The transmission type didn't dictate the TCS unit used.
In 1970,it was it's own seperate unit. All Small Blocks used the same design,part#1114432,as did the Big Blocks,part#1114434.The Mounting brackets were the difference in the part #'s. New for 1971,the TCS solenoid was reconfigured into the Idle speed solenoid.This was incredibly heat prone,more so then the earlier design,and very unrealiable. In 1972,the TCS solenoid became it's own seperate part again.
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#7
09-13-2005, 07:47 AM
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Re: 70 LT-1 Vacuum Advance Solenoid
Mine is PN DR1114432. I tested the solenoid and without power the metal vacuum tube (one on the right) and the plastic tube (pointing out at 90 gegrees) are connected. With power applied, the metal tube is blocked and both plastic tubes are then connected.
That means if the engine vacuum is applied in the above fashion, it would never reach the distributor. Is this solenoid supplying vacuum to the distributor when energized or with no voltage? The assembly manual shows one leg of the solenoid wiring going to the "TRANS SW. CONN" Which switch is this? Is it on the trans? The other leg goes through the "TCS RELAY" What is the function of this relay? To isolate another switch from the current draw? Thanks, Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's 69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD 69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth
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