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71
Wedge List / Re: Coils, ballasts and ohms.
« Last post by Randy Tess on June 28, 2018, 08:31:55 AM »
Thanks Jim.  That helps. I'll check coils tonight and see what is going

on.





Randy
72
Wedge List / Re: Coils, ballasts and ohms.
« Last post by "Jim Altman" on June 27, 2018, 03:22:53 PM »
The resistance of a coil is an essential fact and if the spec sheet doesn't

tell you what it is, you don't want it.  Total normal running resistance

ballast+coil should be about 3 ohms. Different electronic ignition systems may

look for a specific value, but 3 ohms is most common. The stock ballast for an

FI TR8 supplies about 1.2 ohms, so a 1.5 ohm coil is good.  The carb ballast

supplies 1.7 ohms. Both cut the resistance to .4 (FI) and .5 (carb) when the

starter is running, to give a hotter spark at that time, not real good for the

coil, but it doesn't last long. Stock ballast-less coils are usually 3 ohms.



I have a Crane in the TR8 FI and it works fine on the stock coil with the

stock ballast.  In my 240Z I have a Pertronix, but if I run the stock coil and

stock ballast it flat tops at about 4000 RPM and wont go beyond.  Putting in a

ballast-less coil and by-passing the ballast eliminated the problem.  I could

explain why, but I would have to violate your request not to use technical

speak p

 but briefly, AC resistance (the coil) and DC resistance (the

ballast) are not really the same thing (even tho both are measured in Ohms)

and different combinations may cause the electronic ignition to behave

differently than desired.





Jim Altman

jaltman636@gmail.com
73
Wedge List / Coils, ballasts and ohms.
« Last post by Randy Tess on June 27, 2018, 02:05:36 PM »
So my coil died in the 1980 FI TR8.

Odd as I replaced it with a new Lumenition one last October while chasing a

separate issue.



My car has a dealer installed Lumenition PMA50 with the optical chopper

system.

I still have the a paper work and instructions.



I have read several articles on ohms, ballasts and coils and am trying to

make sure i have the right combination.



The PMA50 paper work says no more than 3.0 ohm combined coil + ballast.

Not to be used with a 1.0 ohm coil.

Is the 9BR the ballast they refer to?

If so, what is the resistance in it?



Most of the ignition coils I look at do not even list ohms.



Can someone out there explain, in less than technical speak, how this all

works?



Thanks!



Randy Tess

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74
Wedge List / V8 Exhaust Manifold Gasket Snafu ??
« Last post by Bill on June 23, 2018, 11:04:28 AM »
Hi Listers,



I saw a while ado about the paired stainless shim type of exhaust port

gaskets interfering with ARP head studs.B  I took a look, sure enough...B  

It is hard to tell how much pressure is being put on the joint seal but

the manifold seems to be clamped.B  I would rather not disassemble.B  Has

anyone experienced gas leakage or a good seal?B  Odds...?



The motor is not yet installed in the car, I am getting ready to bench

run it for leaks etc before installing.B  I tried to snip the connecting

band with sheet metal snips but the layered stainless seems pretty

resistant to being cut and access isn't good.



If anyone has successfully cut them on the motor do tell how you got it

done.B  Abrasive wheel is a nogo of course...



TIA, Bill

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75
Wedge List / Re: 1980 TR7 Electic Clock???
« Last post by Bill Derksen on June 15, 2018, 07:55:10 PM »
I think you can still get the clock new from Rimmers. They show up on

ebay all the time, and I have at least one here.

Here is an article on how to fix them:

http://www.littledoggarage.com/Articles/TR78clock.pdf



Cheers

Bill
76
Wedge List / TR7 silent flasher??
« Last post by Bill Derksen on June 15, 2018, 07:53:35 PM »
Yup - very dim indicators in the instrument cluster and a quiet

flasher/noisy car. Don't ask me how many miles I've driven down the

highway with the signals merrily flashing away...



You might find a louder flasher, or put in brighter bulbs/LED's in the

cluster, or there are a few articles around on putting a small buzzer in

the circuit to make it more obvious when they are flashing.



Bill



On 6/15/18 15:10, TYA2 wrote:

> The flasher in my 1980 TR7 works in that the lights flash

> appropriately when activated and it cancels properly.B B  However it is

> so quiet I can't really hear it.B  I have a number of the other

> vehicles and don't have the problem with these vehicles.B B  Are TR7 and

> 8 flasher relays really quiet? or is this anomaly than can be solved

> with a new one from Victoria British?

>

> Reg

>

> 1980 TR7 DHC

> --

> .

> Archives provided courtesy  http://www.triumphwedgeowners.org

>

>

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77
Wedge List / Re: TR7 windshield washer pump??
« Last post by Bill Derksen on June 15, 2018, 07:40:24 PM »
If it is the original type, just plan on replacing it. They do seem to

have a very limited lifespan.



Bill
78
Wedge List / 1980 TR7 Electic Clock???
« Last post by TYA2 on June 15, 2018, 05:15:36 PM »
My clock stopped working is there a magic fuse for the clock in the

TR7?  It is a factory original in the top left corner of the main

instrument cluster  with remote controls at the bottom of thedash near the

reset for the trip odometer.   Is there a source for replacement clocks of

this style?



Sorry for all the questions but the more I drive Colonel Mustard the more

niggly little things to be fixed come to light.



Reg

1980 TR7 DHC

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79
Wedge List / TR7 silent flasher??
« Last post by TYA2 on June 15, 2018, 05:12:13 PM »
The flasher in my 1980 TR7 works in that the lights flash appropriately

when activated and it cancels properly.   However it is so quiet I can't

really hear it.  I have a number of the other vehicles and don't have the

problem with these vehicles.   Are TR7 and 8 flasher relays really quiet?

or is this anomaly than can be solved with a new one from Victoria British?



Reg



1980 TR7 DHC

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80
Wedge List / TR7 windshield washer pump??
« Last post by TYA2 on June 15, 2018, 05:08:56 PM »
Dear TR7 and 8 ers,



My 1980 TR7 windshield washer pump is acting up.  It is not the fuse

because it makes a sound when the switch is activated.   The reservoir is

full.   The water is not being pumped out somewhere else because I have

checked the washer lines under the hood for leaks and clogs.   So what is

left besides replacing the pump which sounds normal??



Reg



1980 TR7 DHC

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