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Is the Petronix electronic conversion kits easy to install on a slant six?

Started by WH23G3G, March 22, 2015, 05:09:40 PM

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WH23G3G

So some background on this 65 Valiant with a 170 and a Holley 1920. I've got it running pretty good and everything working good on it except maybe carb or ignition. I haven't narrowed it down to where the problem is; ignition or carburetor. Within the last year I installed a remanufactured Holley 1920 and I actually took the bowl off measured the float level and installed the OEM fuel baffle. It idles good, takes off good, but sometimes it sputters when you stomp the gas and sometimes it takes a few times to start it up before it stays running even after it's been warmed up and then you shut it off and restart it. I recently installed a new choke thermostat in the manifold from Mike's carbs. New fuel filter, new fuel pressure gauge inline, fuel pressure reads steady 5psi. We've checked and played with the timing and it's currently at 5 degrees BTC which on specs, factory for 65 was 2.5 degrees. I'm not finding any vacuum leaks at the manifold, carb, vacuum advance hose, or pcv. It's got good 17in-hg vacuum at idle. So I'm wondering if electronic ignition will improve driveability. When I redid the wiring on this Valiant I got a new dash harness and engine harness from Year One. But the engine harness they had in stock was for the factory point type distributor, so I bought it. I bought a remanufactured distributor probably 2 years ago now which already had new points and condenser installed. Now if I want to switch to electronic ignition can I do it without cutting into my new wiring harness? How hard is it to install one of these Petronix kits? If I used the Petronix kit would I still use my OEM ballast resistor and voltage regulator? Does Mopar make an ignition conversion kit that is easy to install without having to cut my new harness? I think if I could get it running smooth with good power this would be really reliable car, there's nothing to it!

ZekesGarage

Hey, since no one has thrown in on this yet, I'll see if I can clear some things up.
But take note, I'm just getting into the Mopar world with my Charger, and my other personality is hard core GM, so your mileage may vary.

The pertronix drop in kits are pretty easy to install, and according to the directions, you do not have to bypass the ballast resistor if you're using your stock coil. In fact they state that you can keep your points as a backup and drop them back in without modification. The modification to electronic ignition on a stock engine has been debated to death, so it's up to you as to whether you want to go that route.

As for your drivability issues, what you describe sounds like an accelerator pump mis-match in your carb. When you stomp on the gas and the engine stutters, that could be too much fuel being shot in at once, making it rich, or not enough and making it lean. I'm not familiar with your model of carb, but there may be different holes in the pump arm so that you can adjust how much of a shot it gets under hard acceleration.

As for cold-start, that might actually be an ignition issue, or an idle mixture setting on the carb. Those are tougher to troubleshoot without a sideband O2 sensor.

Good luck with it!

Shawn
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'69 Charger R/T 440