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Pertronix 1741 Ignitor and 40,000 volt Flamethrower coil


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#1 g-mam

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Posted 28 June 2009 - 08:45 AM

I want to ditch the points. This looks like a cheap way to go. Do I still use the ballast resistor?

I can get both these for $103 delivered.

I'd like to replace the Dist cap, plug wires, rotor if someone can reccomend a good set. I'd kind of like to have colored silicone wires.

Then it's new plugs!
Gary F.

My 1974 Datsun Pickup

#2 SHADY280

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Posted 28 June 2009 - 08:54 AM

yes you must keep the ballast resistor with pertronix, it will melt otherwise, get a coil that is meant for ballast resistors, or a coil with an internal resistance to match, i know msd has one, but never have tried it. also search is your freind, i believe this has come up before to double check what coil to use.
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Again I have to say when is it enough hp? A 150 hp KA is scary. 200hp is rocket ship. 300 would go back in time. Eventually you get to the point where you aren't enjoying the drive because you are too busy aiming it.


#3 g-mam

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Posted 28 June 2009 - 08:56 AM

I hope this is the right coil, as they sell it as a kit for this application.
Gary F.

My 1974 Datsun Pickup

#4 ggzilla

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Posted 28 June 2009 - 12:12 PM

If the kit doesn't come with a ballast resistor, and the directions don't show one, then don't use it.

But a 40,000 volt coil won't put out 40k volts with a ballast resistor. It's all hype anyways.
Here today gone tomorrow

#5 banzai510(hainz)

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Posted 28 June 2009 - 12:18 PM

Just keep your stock coil and ballast resisitor. No need for that coil. sve your money.

However since you have a L20 distributor you have to remove that ring above the point lube. That means you have to strip the dizzy apart.

have you done this bfore????????? As the kit is really for a Hitachi single point L16 distributor. Then its a drop in otherwise the L20b dizzy has to be modded. The Ring above the point lobe must be machine or the Magnet ring will not fit over the ring.
Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#6 g-mam

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Posted 28 June 2009 - 12:31 PM

No, I have not done it. I have a single set of points though.
Gary F.

My 1974 Datsun Pickup

#7 polski ogorki

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Posted 28 June 2009 - 05:25 PM

No, I have not done it. I have a single set of points though.

i have a the kit with the coil and i brought my diz to a local machine shop and did not have to rip it all apart. buddy just put the whole thing in a lathe and took off the nub!he charged me ten bux and i whent and hooked it up! the instructions that come with the kit say if you use the flamethrower you are to remove the resistor and i did a long time ago and she runs great! there is a plastic cap€ cover thingy that didnt fit in so i dont have it and ya its great get it!fuk points!

#8 g-mam

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Posted 28 June 2009 - 05:35 PM

What is this NUB? I was told this was a drop in, maybe I'm wrong.
Gary F.

My 1974 Datsun Pickup

#9 HRH

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Posted 28 June 2009 - 09:36 PM

I run the Pertronix in the 510, but I hate ballast resistors. As long as you get the correct ohmage of coil, you're fine without it. Here's a write up on mine, doesn't show in the car or anything. It's definitely not rocket science.

http://www.mattalber...t/pertronix.htm

#10 banzai510(hainz)

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Posted 29 June 2009 - 09:47 AM

You know what????? I dont know what distributor you have since you have a 74 truck. You tell us or show a photo of what you have.

pertronix is for a single pouint L16 Hitachi distributor.
It will NOT fit a dual point dist. I say NOT!!!!!!!!

But can be made to work in the later single point Mitshibishi and single points Hitachi L20b dizzys.
In my DVD I mention one might be able to chuck it up in a lath and not take it apart if a machine shop can do it that way as mention by Polski

here is a L20 conversion removing the RING above the point lobe.PHOTos Below
PS I have had one L20b dizzy the holes would not line up on dizzy correctly. so it could not be converted.

Attached Files


Edited by banzai510(hainz), 29 June 2009 - 09:50 AM.

Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#11 g-mam

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Posted 29 June 2009 - 01:37 PM

Photos I CAN DO! :)

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Gary F.

My 1974 Datsun Pickup

#12 banzai510(hainz)

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Posted 30 June 2009 - 05:23 AM

Yep
Yours is a bolt in for the Pertronix!!!!!!!!!

I say installe the Pertronix first with your stock coil and ballast to make sure it works fine. Then if you just got to use the pertronix coil then install it. I hope you got the 3 ohm Pertronix coil as that is what is recommended.
If using that you will route the blk/blu wire also to the +side as with the blk/wht.

But for now just do it stock.
Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#13 g-mam

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Posted 30 June 2009 - 05:28 AM

don't know if it's the right coil, but the place I ordered said it was.
Gary F.

My 1974 Datsun Pickup

#14 GBean

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Posted 28 October 2009 - 11:36 AM

I have this unit on my l18 powered 510 and love it.
My dad was always changing the points on his 510's and got the accel optical setup later on, but as others have said, its not as reliable when dirty or in really dense fog for that matter.

If you use the ballast, it seems the spark is way too weak and won't run at idle.

I am using a 3 ohm 40,000v accel coil.
I don't think not using the ballast is fine, as the current doesn't go through the pertronix unit, but os more of triggering switch telling the coil when to fire.
I may be wrong, but I have had the ballast bypassed for years with no problems. I even gap the plugs to .040"

#15 Braden

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Posted 28 October 2009 - 05:38 PM

bwd cap and rotor, ngk wires and plugs
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#16 banzai510(hainz)

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Posted 29 October 2009 - 09:55 AM

Run the stock coil with ballast!!!!!!!!! = 3.2 ohms this is OK. when in START the blk/blu wire is bypassed and getting double the current to coil as the starter is loading down the circut.

if using Pertronix 3 ohm coil you dont need the ballast but best to hook up the blk/blu wire(HOT START WIRE to the + of coil also with the blk/wht wire)

Edited by banzai510(hainz), 29 October 2009 - 10:08 AM.

Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#17 pl521sss

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Posted 29 October 2009 - 10:20 AM

Part numbers you are here
http://forum.ratsun....read.php?t=4176


Here's a 1741 Pertronix on a Hitachi distro
Using a OEM Nissan 12 volt coil ($5 at the JY)
Wired directly to the coil and with the BlackWhite wire to power it.

It does say to use resistor if your coil needs it but.....
This is the same setup I use on 3 of my Datsuns
All I know is that it works and has not failed.


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Datsun 510 | 521 | 620 | 410

 

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#18 CameronT

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Posted 04 December 2013 - 07:58 PM

Is it possible to run, 1741 with an excel street stack coil? Or?

#19 ggzilla

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Posted 04 December 2013 - 08:25 PM

Yes it is possible. It also exceeds the specs of 1741 and will eventually burn it out unless you use a ballast resistor, reducing the 1.5 ohms down to normal 3 ohms. The Pertronix Ignitor II can handle it but the 1741 cannot.
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#20 genkiracing

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Posted 05 March 2014 - 12:40 PM

I'm glad someone dredged this up. I was thinking of putting in the matched pair, 

Pertronix 91741 Ignitor II + PerTronix 45001 Flame-Thrower II 45,000 Volt 0.6 ohm Coil

into the 510. I thought having the high power coil over the stock coil/balast setup might help smooth out the roughness I get between 6800 and 7100 rpm. Currently, I'm still running points, btw.

 

Any thoughts on other different or better options?