Gawd I Hate Points, Won't keep a tune Options

[bbrock]

Quick background. Engine is a rebuilt 2L with Elgin cam and Weber 40IDFs. I bought a Pertronix Ignitor 3 to avoid having to mess with points but I could only get it to work well with a NOS Bosch 050 distributor. It runs rough with a brand new Bosch clone SVDA and the OE dizzy. However, the engine runs best with the OE DVDA distributor so I'm running that with points.

The problem is that I've had to adjust dwell and timing 3 times in only 1,000 miles of driving. Each time the dwell creeps up until the engine starts spitting and farting and is a bit hard to start when warm. Readjusting the dwell and timing gets it running like a top again. So (IMG:style_emoticons/default/WTF.gif) Only thing I can think is that the phenolic block on the points is wearing crazy fast. I lubed the cam and block with high temp slicone grease and I can feel it is still on there. Did I just get a shitty set of points?

[914werke]

I just happened to speak to a Pertronix rep this last week when trying to make a purchase decision on a 1.8L dizzy application. I got lucky to speak to surprisingly knowledgeable tech & a ACVW owner.
His comments were interesting.
He said in our applications (ACVW in general & T4 specifically) for 90% of the owners he'd never recommend the purchase any of the III products.
The II offerings (points replacement & dizzy's) were the best option.

[Superhawk996]

He said in our applications (ACVW in general & T4 specifically) for 90% of the owners he'd never recommend the purchase any of the III products.

@914werke

What was the rationale? Inquiring minds want to know.

I'd bet due to multi-spark feature which really isn't going to work well with a standard coil but I'm sort of quessing.

[bbrock]

He said in our applications (ACVW in general & T4 specifically) for 90% of the owners he'd never recommend the purchase any of the III products.

@914werke

What was the rationale? Inquiring minds want to know.

I'd bet due to multi-spark feature which really isn't going to work well with a standard coil but I'm sort of quessing.

Very interesting. I went all in and also bought the Flamethrower III coil which I would assume would work well with the multi-spark. I suckered in by the programmable rev limiter though. I'm also curious to know the reps rationale.

[Superhawk996]

He said in our applications (ACVW in general & T4 specifically) for 90% of the owners he'd never recommend the purchase any of the III products.

@914werke

What was the rationale? Inquiring minds want to know.

I'd bet due to multi-spark feature which really isn't going to work well with a standard coil but I'm sort of quessing.

Very interesting. I went all in and also bought the Flamethrower III coil which I would assume would work well with the multi-spark. I suckered in by the programmable rev limiter though. I'm also curious to know the reps rationale.

@bbrock

(IMG:style_emoticons/default/idea.gif) Are you running that Flamethrower coil with the stock points?

From Summit Website:
PerTronix Flame-Thrower III ignition coils were developed for use with the new Ignitor III electronics. They feature an ultra-low resistance of 0.32 ohms with 45,000 V. They were engineered to charge to peak current typically 30-70 percent faster than other ignition coils. This means that maximum spark energy is sustained to higher engine rpm.

Stock coil has built in ballast resistor and is about 4 ohms. You are pulling an order of magnitude more current though the points contacts if you are running points with the Flamethrower. 10x more current will erode the contacts more quickly and/or you could be getting thermal distortion as they heat up.

Just a thought . . . . (IMG:style_emoticons/default/type.gif)

The increased current flow thought the points and coil will also result in more about 10x more induced voltage that the condensor has to absorb. This could be damaging your condensor. Equation for Voltage induced by an inductor is Voltage = inductace (of the coil) x rate of change in the current; V= L(dI/dT). 10x more current = 10x more voltage if steady state current is achieved before the ponts open the circuit.

If the ad copy from the Flamethrower is to be belived, maybe you're only getting 30-70% of that due to other inefficiencies but the math says you would still be getting 3x more currrent flow and induced voltages if we took the 30% peak current with a grain of truth.

Don't want to get lost in the math and electrical theory . . . . use a stock coil if you're not doing so already.

[bbrock]

(IMG:style_emoticons/default/idea.gif) Are you running that Flamethrower coil with the stock points?

No. I'm running a new Bosch blue coil from Pelican

[Superhawk996]

(IMG:style_emoticons/default/idea.gif) Are you running that Flamethrower coil with the stock points?

No. I'm running a new Bosch blue coil from Pelican

Give it a quick resistance measurement just to be sure!