Aftermarket ignition boxes on vintage Benz? - Page 2 - Mercedes-Benz Forum

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post #11 of 14 (permalink) Old 10-08-2005, 08:44 PM Thread Starter
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RE: Aftermarket ignition boxes on vintage Benz?

Well, I just installed the MSD 6A ignition box with the "Blaster 2" coil. The installation went smoothly - the hardest part was finding a spot under the hood to mount the box.

After installing the box and coil, and making sure the engine still started, I removed all the spark plugs and increased the gap from the factory-spec .020" to MSD's recommended .055".

The car starts up quicker when cold then it did before, even though I thought the cold-starting was just fine before. I haven't driven it enough to see if the new box/coil solved the slow hot-starting issue, but I'll know more tomorrow. I'm also going to top off the gas tank tomorrow morning so that I'll have a full tank to evaluate any changes in fuel economy.

Scott
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post #12 of 14 (permalink) Old 10-10-2005, 01:12 AM Thread Starter
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RE: Aftermarket ignition boxes on vintage Benz?

Well, I've had the new ignition box and coil in the car for two days, so here's an update:

I thought the cold-starting was pretty good before, but it's even better now. Now, I pump the accelerator once and turn the key, and I usually don't even hear the starter motor turn - the car just starts up instantly.

Hot-starting still takes longer than cold-starting, but it's down to 1-2 seconds now, which I consider pretty normal. I'm still figuring out the best way to start the car when hot (pump the gas pedal first or not, where to position the gas pedal while I turn the key, etcetera).

I just filled up the tank, so it will be a few days before I find out if my fuel economy has improved. The gas mileage for my last three tankfuls with the stock coil were extremely consistent (14.20, 14.78, and 14.67 MPG), so if there's any improvement, it should be fairly easy to detect over the next few tanks. Heck, at today's gas prices, even if I only pick up one extra mile-per-gallon, the coil and box will pay for themselves in a year!

Scott Gardner
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post #13 of 14 (permalink) Old 10-10-2005, 09:09 AM
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RE: Aftermarket ignition boxes on vintage Benz?

You're not actually driving my -ex around in this crappy weather, are you? [:D]

Still have your manual and odd parts here...catch me soon as I'm going to the Gulf for a six-monther soon myself. I'll even introduce you to the latest addition to the family (the '82 300D)!

"...Forward...unflinching, unswerving, indomitable, till the whole task is done and the world is safe and clean."- WSC
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post #14 of 14 (permalink) Old 10-10-2005, 10:53 AM Thread Starter
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RE: Aftermarket ignition boxes on vintage Benz?

Quote:
navydave - 10/10/2005 11:09 AM

You're not actually driving my -ex around in this crappy weather, are you? [:D]

Still have your manual and odd parts here...catch me soon as I'm going to the Gulf for a six-monther soon myself. I'll even introduce you to the latest addition to the family (the '82 300D)!
Well, I said she was going to be a daily driver replacement for my Honda, so she's probably seen more rain in the last week than she has in the last few years, but she's handling it just fine and I'm washing her every other day to keep the crud from accumulating. She hasn't been exposed all that much recently anyway - I just got her back from Larry's last week ($1800 and two weeks later), and they were keeping her inside at night (unlike several 500's and 600's I saw parked outside their shop overnight - I think they're really fond of "our" 250 there.)

I didn't know that you were already back from picking up the 300D. My Gulf trip has been temporarily postponed, so I'll call in the next day or two so we can trade parts.

Scott
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