Molasson73

Hello everyone,
I need help to choose my new ignition coil, my olds coi is dead i need to replace it.
Before it was a accel racing coil 140305 on it, and i found the MSD blaster 2 on internet in france.
I ve got the Sb V8 5,7 L 350 rocket.
Is it ok with this ignition coil, or i need to replace it by the SMP UC12?
Thansk for your help
See you and happy new years !

redoldsman

Has the engine been modified or is it mostly stock? Does it still have the original ignition with the points? If it is stock, you don't need either of these coils and a regular replacement coil should be fine and save you some money.

Molasson73

i don't think the engine has been modified. i think they just change the coil once. how i can see if it's the orginial ignition with points?
that's my first olds car, so i m a beginner.
Si if i's a ignition with point a Standard motor products is fine ?

redoldsman

If the coil is a round coil with one small wire and the wire from the center of the car running to the distributor, then it is a points distributor. There could be a small chance somebody converted to a Pertronix or Mallory solid state. You can take the cap off and see if the points and condenser are still under the cap.

oldcutlass

Just remove the distributor cap and look inside. You'll see this...




Or this for points



or this for a points replacement

Yellowstatue

If it's a '74 won't it have an HEI in it??

OLDSter Ralph

From what I read online someplace, HEI started on Jan '74 and later. I am sure the knowledgeable people can set the record straight on this.
Of course, retrofits are not out of the question.

Oldcutlass, the pics should help him determine what he has, thanks.
Ralph

redoldsman

I believe HEI started in 1975 which was the same year catalytic converters started. Good job on the illustrations Eric.

Molasson73

Ok i will check this, thanks it's really helping me.
Last question can i use the SMP uc12 even if it's a point replacement, or i should by MSD blaster ?
i have seen ballast ? in wich case i need it? coz i ve got a resistance wire going to the ignition .
thansk and happy new years

redoldsman

I don't know what a SMP uc12 is but I assume it is a regular coil. If you have points you can use a regular coil. Using a MSD blaster will just be a waste of money.

Molasson73

This coil is for point replacement?

redoldsman

Yep.

olds 307 and 403

The low resistance aftermarket coil need a ballast resistor. Coils like the accel points replacement supercoil have higher resistance built in.
https://www.summitracing.com/parts/acc-8140

redoldsman

I am not sure but I believe 74 used a resistor wire instead of a ballast resistor. I might be wrong which is not unusual.

Molasson73

yes i have a wire resistor as in the diagram, is it for reduce the voltage going to the coil?
coz i have got 9v at the positive of the coil when i turn the key .

Sugar Bear

Yes the resistor wire reduces the voltage to prevent the contacts on the point set from burning prematurely. The voltage to the coil should be full battery voltage while in the crank/starting mode and approximately 9V in the run mode.

Molasson73

ok thanks to every one, i will let you know if my olds will crank !

Molasson73

Hello,
So i replace the ignition coil by standar product, and it's still the same thing as before.
What's new is that the resitor wire when i turn the keyon start to be hot, and now i have only 6v on the positive of the coil.
I don't understand why now it 's less, coz before i change the coil it was 9v.
when i turn the key to start it's turning but looks like no spark, where could the problem come from? from the point in the distributor? spark plug?
How i can test the point ? or if i ve got spark at the spark plug ?
Thanks for your help
see you
Antoine

oldcutlass

Have you determined if you have points or not?

Molasson73

yes i have points, like this

oldcutlass

Inspect the points, if the contacts are burnt they need to be replaced. You need to make sure your points are opening and closing with the correct dwell of 30* or a point gap of .016. To see if you have spark, pull the center wire from the distributor and hold the end near the engine block when cranking the engine. You will see a solid spark.

This is a good read to trouble shoot the ignition system.
https://classicoldsmobile.com/forums...-ignition.html

Molasson73

ok.
If the points are burned, fore replacement, i need specific one or not ?
And i change the coil, but now i m thinking if this one was dead or not, i test the primary resitance 1.4 Ohm et secondayr 15K ohm.
and one the new one i ve got something like 0.8 and 9k, do you think that is correct ?

oldcutlass

You need points that fit a GM points distributor. I would also replace the condenser. Being you are in France, I don't know what your auto parts stores stock. Both coils are probably ok by your readings.

Molasson73

there is not much auto parts stores with that point and condensor in stock
maybe you know good website in US
that could deliver that in France ?

oldcutlass

Rockauto, Summit, Jeggs

Molasson73

ok this is with condensor?
https://www.summitracing.com/int/par...utlass-supreme

redoldsman

Yep. That is what is referred to as a uniset. It is a lot easier to install than separate points and condenser. Your car may have separate points and condenser which this will replace. Rock Auto has the same points for about $5.00 less plus several other brands. Standard is also a good brand. Here is the link.

http://www.rockauto.com/en/catalog/o...r+points,11337

oldcutlass

I'm not fond of the uniset, I always buy separate points and condenser.

redoldsman

I remember that and I think the uniset rates right up there with sliced bread. It might be because I lost so many hold down screws for the condenser.

Molasson73

so my points is burned as you say and i found one delco remy points in France.
I will have in 2 days and i will let you know if crank !
thanks again for your help !

oldcutlass

You might as well check your spark plugs also, replace if they have been in there a while. If the inside of the cap and rotor look burnt/corroded or have a buildup of carbon, I would also replace them. Same with the spark plug wires if they are old and dry looking.

You need to set the points to .016 gap with a feeler gauge on one of the high points of the distributor cam. If you have a tach/dwell meter adjust them with the engine running to 30*. Then you need to set your ignition timing to 12* BTDC at 1100 rpm. After you have the timing set drop your curb idle speed to 650rpm in drive. Once you've done that adjust your carburetor A/F mixture screws.

Molasson73

this one will be good for my car ?
https://www.summitracing.com/int/parts/msd-5564
And this caps and rotor ?
https://www.summitracing.com/int/parts/msd-5500

oldcutlass

While those woud work, check with Rockauto
http://www.rockauto.com/en/catalog/o...17595,ignition

Molasson73

yes but the one before i can order in france
what do you think about the two that i found ?

Molasson73

Made for chevrolet SB 265 to 400 ci from 1955 to 1974

oldcutlass

The wire set is for an hei cap with male terminals and will not work.
These will work
https://www.summitracing.com/parts/t...utlass-supreme

The cap and rotor will work.

Molasson73

Finally it's sprank and run ! i replace points et set it ! thanks to everyone !
i will be back soon i thnik for new toppics

oldcutlass

Congrats, well done.