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Weekly Fun Question for 12-10-2011

Call Me a Cab
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Weekly Fun Question for 12-10-2011
Good Day All!

The question for this week was developed by 72 R Code as a result of his having been the first from the VIP ranks to provide the desired response to last week's Weekly Fun Question.

Please note that this "contest" will end at approximately 7:00 PM (CST) on Monday, December 12, 2011. Specifics on the Weekly Fun Question can be found under an "Explanation" Thread on the "Site News" Forum.

The Question:

What does TRS stand for and what is it's function as it relates to our 1971 - 1973 Mustangs?

Good Luck!


Transmission Regulated Spark. It is part of the emission control system. It works through an ambient temperature sensor located in the A pillar, and a TRS switch on the transmission. It keeps the distributor vacuum advance from working if the temperature is below 45 degrees or the manual transmission is in high gear. On automatic transmissions it is activated by speed.

Do the RIGHT thing.
12-10-2011, 09:32 AM
  Find   Reply

The Transmission Regulated Spark Control System (TRS) differs from the Dist-O-Vac and ESC systems in that the speed sensor and amplifier are replaced by a switch on the transmission. The switch is activated by a mechanical linkage which opens the switch when the transmission is shifted into High gear. The switch, when opened, triggers the opening of the vacuum lines to the distributor, thus providing vacuum advance. So, in short, the TRS system blocks vacuum advance to the distributor only when the outside temperature is above 65°F and the transmission is in First or Second gear.

[Image: hvrju1.png]
71 to 73 mustang cars with manual transmissions had a thottle position sensor that was called TRS and it stood for Transmission regulated spark
We have a European "Winner" as Mach1JB from the Netherlands was the first to post with the desired response. This is Mach1JB's second "win" as he also won the May 28, 2011 Weekly Fun Question.

Congratulations, John!


Do the RIGHT thing.
Congratulations! I've updated your award badge to reflect this week's win! Big Grin

[Image: 1gq8uo.png]
1971 Mach 1 - 306cid/C4 Bright Yellow
"Just relax, I've got a friend named Felix who can fix anything!" ~James Bond
Congratulations John! Good job!

[Image: 386_07_10_13_5_58_42.jpeg]
My Mustangs:
71 M-code Mach 1, Medium Blue/White Sport, 4R70W, 3L50, Factory Ram Air.
72 Q-code Mach 1, Pewter/Black Sport, 4-spd, 3L25.
65 Convertible, Britney Blue/White/White, more modified than original.
05 Convertible, Legend Lime/Tan/Tan, future classic??
Way to go! U Da Man!

[Image: 2rr7aiv.png]

Just cruising along minding our own business when BAM!!! The LAWS show up.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
Congrats Mach1JB!! What is up with Europe!?? jeje!!!... Enjoy being the best theorical guy of the week! Tongue

Damián Cool

[Image: 120x45bk1ani.gif]
Vote For 7173Mustangs.Com Every Day!

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