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Wedge List / brake proportioning valves
« Last post by tencate on May 13, 2019, 11:17:35 PM »
Has anyone recently bought a brake proportioning valve from Rimmers? I recall

a handful of years back that they'd found a stash of NOS ones in a warehouse

in India or someplace. But I've also heard from a few of you that they don't

last and leak within a few months of installation. Bad.



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Wedge List / Re: Fuel Tank Canister
« Last post by Chris Sharp on May 13, 2019, 04:48:43 PM »
Thanks Dave.  The car has been stripped, literally, the separator is the

only thing left on the body shell.  I think the plan now is to tape it off

and leave it attached while the body is media blasted and painted.

Wedge List / Re: Re: cruise control
« Last post by DAVID MASSEY on May 13, 2019, 12:40:11 PM »
My solution was to use a relay.B  I made the cruise control brake wire

connection to the NC contact with the COM contact to ground and connected the

windings across the brake lights so that when the brakes are applied the

circuit goes open but provides a ground otherwise.B  It might (would) be

simpler to wire a filament bulb in parallel with the LED bulbs and let the

circuit work as designed.B  I don't know how small of a bulb will suffice as I

have not done any experimenting.B  The relay method is a one-and-done approach

and not all that much more complex.

Wedge List / Re: Re: cruise control
« Last post by Odd Hedberg on May 13, 2019, 11:19:10 AM »
Should suffice with just one hidden incandescent 21 W bulb, right?

Might even work with a bulb of much lesser wattage, but that must be

tested IRL as there might be differences between different individual

Audiovox CC units.  We're after cold filament use for a ground path

which will be interrupted as it goes high resistance with applied brake

lighting...  Comments?


On 2019-05-13 at 13:48 DAVID MASSEY wrote:
Wedge List / Re: Re: cruise control
« Last post by DAVID MASSEY on May 13, 2019, 07:49:01 AM »
That is an interesting characteristic of filament light bulbs.B  When the

filament is cold it is quite low but when you apply voltage to it the filament

heats up and glows (the whole point to the exercise, isn't it?) and since

tungsten has a positive temperature coefficient the resistance goes up.B  The

upshot is that the watts dissipated when energized is lower than that of a

resistor with the same cold resistance.

The standard 1156 bulb is a 30W bulb.B  That calculates out to 6 ohms.B  But

if you measure one with a DVM it will read much less than 6 ohms.B  If you are

considering putting in a 6 ohm, 50Watt resistor (as I did) there is a risk

that the cruise control will not work with a 6 ohm resistance in the ground

path.B  And using a resistor with a lower resistance means lots more watts.B

I think your idea of burying a bulb in the trunk is far preferable.B  But make

sure it is located where nothing will come in contact with the bulb as it will

still get quite hot.

Wedge List / Re: Fuel Tank Canister
« Last post by DAVID MASSEY on May 13, 2019, 07:31:00 AM »
IF you can, yes.B  But check the hoses.B  I had a gas leak that turned out to

be one of the hoses connected to this canister (actually it is a fuel/vapor

separator).B  The canister was fine but the hose does a loop and the outer

part of the loop, the part under tension, was all dried and cracked and I had

a gas leak when the tank was mostly full.B  New hoses fixed that.


Wedge List / Re: Re: cruise control
« Last post by Wayne Simpson on May 12, 2019, 11:08:40 PM »
A few ohms. Depends on its wattage.

Wayne Simpson, sent from my phone



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Wedge List / Re: Fuel Tank Canister
« Last post by Chris Sharp on May 12, 2019, 09:18:18 PM »
Thanks for the comments.  Sounds like it's best to leave well enough


Wedge List / Re: Re: cruise control
« Last post by Bill on May 12, 2019, 07:19:07 PM »
How much resistance does a typical 12V taillight bulb have I wonder.
Wedge List / Re: cruise control
« Last post by DAVID MASSEY on May 12, 2019, 11:51:54 AM »
Vacuum is easy if you are willing to drill and tap your plenum/manifold.B

The manual cautions against tapping into the vacuum line to the brake booster

but that is probable based on liability concerns.B  But that is also an easy

source.B  The twin carb TR8 manifold has no vacuum port available but in my

case I had fitted headers leaving the EGR system vestigial so I replaces the

valve with a plug tapped and fitted with a barb fitting.B  There may be some

plugged ports in the FI manifold you can use.

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