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E34 (1989 - 1995)

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Old 04-23-2013, 09:14 AM
allenbee allenbee is offline
Location: Texas
Join Date: Feb 2013
Posts: 192
Mein Auto: 525
Resistorless spark plugs

So it looks like there are spark plugs with built in resistors and spark plugs without

What did our cars come with ? The dizzy cap engines ? Coil on plugs ? Is there some way to tell this from etc ?

Can we pretty say that any engine built before a certain year would not have had such resistor plugs ? If so, any idea on that date ?

Do resistor-less plugs burn hotter ? Even if they do, would it make any noticeable difference, either by butt dyno or by fuel economy ? Thanks..
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Old 04-23-2013, 02:17 PM
hh3uunp's Avatar
hh3uunp hh3uunp is offline
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Location: MA
Join Date: Nov 2012
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Mein Auto: 2001 Dinan m5
I highly doubt spark plugs would give more power unless you drive a formula 1 car. Bavauto sells upgraded coils but I think those are just scams.
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