12SecondTA

ok my car was originally a 305 tpi... so it had cruise control...

now my car is a built 350, with a speed demon, and the whole shibang. I need cruise control...

i still have the whole vacuum canister thing, the wiring, but what actually tells the actuator to move, and how does it know how fast i am going....

pretty much, how do i add cruise control to the car that doesn't have anything but the linkage...

Sonix

iTrader: (1)

with a carbed 350, it's basically the same as all other late '70s smog mobiles, as far as technology goes.
Maybe drop by the JY, and check out the plentiful caprices, buicks, olds, etc etc.... Anything with a GM smallblock should have the same setup. I think it's a seperate throttle cable, connected to your carb. You could just rob one of those grandma driven sunday driver boats of all it's CC stuff...

You hit the switch, and it pulls the throttle cable (the auxiliary one), taut. Then when you tap the gas, or the brakes, it'll disengage. I think the vacuum sensor/canister is for if you tap the gas... I think when you want to go faster, you push the acc button, and it just gradually pulls the cable harder... Pretty simple stuff I think.
Oh, my car also had a 2 piece speedo cable, the speedo cable from trans went to a black box, then on to the dash. I guess you'll need that... hmm, maybe more complex then I guessed...

dr1

cruise control doesnt lock your throttle in a fixed position.. that would be interesting once you hit a downhill section :P
cruise uses the vacuum cable to adjust your pedal to keep the speed you set

the vss would tell the cruise what speed your going (is that in the back of the cluster like camaros on an 85?)
i think its entirely seperate from your ecm so if you had it before it should just be a matter of figuring out how to hookup the cable

JamesC

iTrader: (5)

The ECM provides a ground for the cruise function:

https://www.thirdgen.org/forums/engi...-function.html

JamesC

Fast355

iTrader: (2)

Just go to the junkyard, find a mid 80s Fullsize Van and rob the cruise setup. It is very easy to strip off the back of the van engine, versus trying to fight the firewall in a car/truck. The harness is seperate from the vehicle harness and runs out of a groumet under the dash and wraps around the engine till it reaches the rear. It has plenty of length to mount te controller. It is a very easy setup to rob. The only input outside of the cruise servo is the VSS. Mine will vary 2-3 MPH, but overall it is a good setup.

I picked up a setup from a mid 80s van for my 1980 Chevy truck that I converted to TBI, carried it to the desk of yard that I am often in. The guy asked what it was from, I told him an old van, and he gave it to me. Took it home and in 2-3 hours I had a functional cruise control setup.

12SecondTA

alright i guess it would have been best if i said my car is an 85, but as far as speedo, vss goes, its an 86, electronic cluster, regular vss, yellow buffer box under passneger side dash...

I need to knwo what the "cruise control module" looks like, and all...

I am pretty sure i still have the cruise control module, it wa son the relay braket thing on the drivers side firewall correct?

all i do, is set it up so it gets input from the VSS and ground it, and i'm good correct?

my car is pretty much stripped of all neccesseties, ie, heater, a/c, just about everything, i wanted a really old school, clean engine bay. so i took everything out except the engine...

but cruise control is a highway fuel economy item, i need it...

JamesC

iTrader: (5)

[QUOTE=12SecondTAI am pretty sure i still have the cruise control module, it wa son the relay braket thing on the drivers side firewall correct?[/QUOTE]


In Camaros the cruise control module is on the pass side behind the dash. Black. Cigarette-pack sized.

12SecondTA

ok so thats what that was.... alright....

12SecondTA

is there any way i could tie lockup, into the cruise control circuit, i dont need lockup while i'm pedalin, but when i'm cruising it could be handy...

12SecondTA

?...

Sonix

iTrader: (1)

there is a way to use an electronic switch to lockup your cruise control. Search on that, I think you just jump a few pins on your ALDL connector essentially.

If your cruise control transducer has a wire that goes hot, when cruise control is engaged and working, which there is, I just can't say which color wire it is or anything, then just tap into that wire, to trigger a relay, which could trigger your lockup. Wow, that was a run on sentance, all commas... I hear my english teacher screaming...

You can use a capacitor in series or something to give it a time delay, say 3 seconds after you put on CC, it'll lock up the TC. Then when you turn off cc, ie, flick the switch, or tap the brakes, it'll unlock, without the delay. Electrically I haven't put much thought into this, as you might be able to tell, but it is possible, and shouldn't be very hard.

Shouldn't the TC lockup automatically now? Or is lockup disabled as you have it set up right now?

12SecondTA

lockup, is completely disabled as is.... i dont normally need it,

its a process too complicated for the current moment for me to be worrying about.

For me to make the TCC circuit work properly i have to open the tranny and a whole list of stuff...

But as for right now, i'm leaving that circuit alone, and just working with what i have....

Sonix

iTrader: (1)

Why would you have to open up the tranny for that? Oh, built 700R4, so it was disabled somehow ?
Easy way would be to just use a toggle switch on the ALDL lines, toggle it on while cruising on the highway... when you want it unlocked, just flick the switch back.
link

12SecondTA

that entire harness is gone.....


my aldl connector is cut out, and my entire chassis harness is reworked...

i might have saved 10lbs by removing the junk wiring.

i'll probrably figure it out....