Cruise Control Options - Now that Cruise King is gone

richard5933 · October 01, 2020, 09:55:56 AM

In general terms I don't have any problems with what he was saying, but there was one thing which seemed odd.

He was insistent that ALL rear-wheel-drive vehicles with magnets on the driveshaft will have 2,000 pulses/mile. With the wide variety of axle ratios and tire sizes on the road, even just in passenger cars, there is no way they all have exactly the same rotation count per mile.

I'm hoping he was just trying to say that all vehicles using the magnetic pickup are to use the 2,000 pulse/mile setting even though there will be a slight variety between them. The 2,000 pulse/mile setting is the lowest possible, and then it jumps to 4,000/mile.

chessie4905 · October 01, 2020, 01:11:44 PM

the cruie doesnt care what the tire diameter or axle ratio is. it just maintains the speed that the signal was generating at the driveshaft when cruise speed was selected. It doesnt give a damn what the actual road speed was. theyve found the 2000 rpms worked good as far as dip switch settings. yrmv.

chessie4905 · October 01, 2020, 01:14:54 PM

check the archives under cruise control. Pete Daytona rts sold them and offered tips on setup. Dont know if he is still around though.

richard5933 · March 13, 2021, 09:29:39 AM

Finally getting around to doing the install on the cruise for my 4108.

My plan is four magnets epoxied to the back edge of the brake drum, with the pickup bracket being held by the bolt which holds the brake pin locking plate.

When putting that bolt back in place, is it supposed to have a thread locker applied to it? Anti-seize? Or, just clean and dry? Can't find any reference to a torque setting, so I assume tighten till it's tight.

chessie4905 · March 13, 2021, 12:11:58 PM

You can check a bolt size torquing chart for tightness. I would use a new grade 8 bolt with some blue or red loctite. Do your drums have at least two threaded holes on the back flange?

richard5933 · March 13, 2021, 12:30:29 PM

Quote from: chessie4905 on March 13, 2021, 12:11:58 PM
You can check a bolt size torquing chart for tightness. I would use a new grade 8 bolt with some blue or red loctite. Do your drums have at least two threaded holes on the back flange?

I don't see any threaded holes. My plan was to use the Dremel to grind clean spots, and then to connect with epoxy.

Should there be threaded holes on all the drums?

chessie4905 · March 14, 2021, 04:20:43 AM

Mine and others I've seen have them. They are only 1/4 ×20 uss. Could have some dirt or surface rust obscuring them. Could be some dont have them.

richard5933 · March 14, 2021, 05:24:42 AM

Quote from: chessie4905 on March 14, 2021, 04:20:43 AM
Mine and others I've seen have them. They are only 1/4 ×20 uss. Could have some dirt or surface rust obscuring them. Could be some dont have them.

I'll look again. Didn't see them yesterday but I didn't try scraping or digging under the surface rust.

Just to confirm, we're talking about on the inner edge of the drum, where the magnets will mount, correct?

If there are no threaded holes, do you see any problem just using epoxy to stick them onto the edge of the drum? The little magnets are only about 3/8 x 3/8 x 1/8 and weigh virtually nothing. Can't imagine them being too tough to stick on.

Anyone have experience going to epoxy route?

chessie4905 · March 14, 2021, 11:06:42 AM

epoxy will be fine. just clean that lip thoroughly I glued them on my scooter and they never came off, even at freeway speeds.I only used 2.
those holes are on that fat lip on backside of drums.

richard5933 · March 14, 2021, 12:35:30 PM

Quote from: chessie4905 on March 14, 2021, 11:06:42 AM
epoxy will be fine. just clean that lip thoroughly I glued them on my scooter and they never came off, even at freeway speeds.I only used 2.
those holes are on that fat lip on backside of drums.

Not seeing any holes - either they've filled themselves in with dirt or are just not there. Epoxy it will be.

Now I just have to wait a few days for spring to return - it's damned cold again.

chessie4905 · March 14, 2021, 05:02:00 PM

Yeah not all probably had them.

RJ · March 15, 2021, 12:16:46 AM

Quote from: richard5933 on March 14, 2021, 05:24:42 AM
Just to confirm, we're talking about on the inner edge of the drum, where the magnets will mount, correct?

Richard -

On my MCI, the speedometer pickup was on the LF wheel, and the bolts were on the OUTER rim of the brake drum.

FWIW & HTH. . .

richard5933 · March 15, 2021, 04:21:47 AM

Quote from: RJ on March 15, 2021, 12:16:46 AM
Richard -

On my MCI, the speedometer pickup was on the LF wheel, and the bolts were on the OUTER rim of the brake drum.

FWIW & HTH. . .

Were the magnets somehow part of the bolt or epoxied to the bolts?

chessie4905 · March 15, 2021, 05:37:38 AM

Different ways to sense speed. Magnet on drum or magnet on pickup. Magnet on pickup is used with flywheel teeth counted with tach pickup.Brother, on his 4104, had a speedometer cable attached to inside of l.f. spindle. Spindle had hole drilled through it. Steel rod attached to dust cap and drove cable. Another way is magnetic pickup mounted near brake drum inner flange surface and picked up signal from bolt heads threaded into drum.

richard5933 · March 15, 2021, 07:13:09 AM

I've still got the speedometer wiring to the dash, unused. But, I think that the OEM speedo worked by varying voltage, not with pulses, so not sure it can be used. If I knew more that might be an option.