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11-30-2014, 02:58 PM #1
Merc V6 Switchboxes, any differences?
Hello, New to S&F and thought you guys might be able to shed some light on this. In the process of replacing switchboxes on a 200 2.5 Mercury and have noticed there are several box manufacturers (Mercury OEM, Sierra, CDI, Arieltek, possibly more.) Are there any differences as far as reliability or consistency? I have also noticed CDI offers a "Quick Strike" switchbox (114-7778R 2.) Any advantages to the Quick Strike box for a motor that runs under 7000? Thanks!
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11-30-2014, 08:07 PM #2
I like the Mallory ones,I think they are built in Germany.Around $100 each.They will run well over 8000 rpm
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11-30-2014, 09:17 PM #3
Awesome, thanks, I'll try those.
I kinda bypassed those because I thought the clear potting looked kinda funny. A couple places have them listed as Mallory 9-25100 or Sierra 7778A12. I took a closer look at one and saw "PRUFREX" molded into the plastic terminal plate, which is indeed a large German auto/industrial ignition supplier. Thanks again.
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12-01-2014, 11:44 AM #4
Mallory and Sierra are made by the same people. Mallory no longer sells switch box's some stock still around but if can't find Mallory Sierra are fine.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"
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12-01-2014, 11:48 AM #5Screaming And Flying!
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Dave X2 Plus he right
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12-01-2014, 11:59 AM #65000 RPM
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12-01-2014, 12:06 PM #7
We use Sierra at work all the time without any problems.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"
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12-01-2014, 12:42 PM #8
sierra products are top notch I also use sierra gear lube hiperf synthetic blend in my lowers as well others good stuff less $$
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12-04-2014, 03:26 PM #95000 RPM
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Sierra bought Mallory a couple of years ago. I use the Sierra pn# 18-5755 on V6s. They are made by Prufrex in Germany. IMO German engineering is second to none.
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12-04-2014, 06:03 PM #106000 RPM
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Just relaying this second had. I have been told that the Mallory boxes do not cooperate with the Brucato ACU very well.
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12-04-2014, 07:11 PM #115000 RPM
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I have Mallory switch boxes and a Brucato ACU on my 225 and it runs great
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12-04-2014, 07:40 PM #12Supporting Vendor
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Myron,I had two sets of Mallory boxes on a 200 Efi with an ACU,double fired on 3 and 4 only...no problem with Merc Ecu,but the Brucato box would flood on 1 set of injectors.Tony tested the ACU,said it was fine,I started changing things...note a couple things...
1 two sets of new Mallory boxes did the same thing.
2 could not see the double fire with a timing light or handy-tach.
3 stock Merc Ecu ran fine
4 motor ran fine with stock Merc boxes with the acu
5 Tony had not seen or heard of it before...and I've used literally hundreds of Mallory and Sierra boxes,and have done well with them
My observations...livel and learn,die and forget it all,Chris
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12-04-2014, 08:32 PM #13
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12-04-2014, 08:35 PM #146000 RPM
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Truer words have never been spoken. Having owned Mercedes, Porsches, Audis and VW's I wouldn't touch their electronics with a ten foot pole. Only thing worse is English ANYTHING and Italian of course but that goes without saying. If they were Japanese I'd be all over them.
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12-05-2014, 09:03 AM #15
ENGLISH electrics. Back in the dark ages I had 2 MG Midgets and a Healey 3000. Lucas electrics. Lucas was known as "The Prince of Darkness". That's why I referred to the "dark ages".
I carry a gun because a cop won't fit in my pocket.
1987 Glasstream 15V
1986 Mariner "Tower of Power" 115