spark plug ?

littleblackpsycho

littleblackpsycho

Donating Member
Are cr42ts the same as r42ts delco plugs, The guy at the parts store told me that the c just means that they come in bulk is this correct?
Thanks
 
toolmann

toolmann

Member
Re: spark plug ?

Jimmy said:
Get some Autolite 23's.
They are on the shelf,work great.
Click to expand...

Im with Jimmy. I just threw a set of NGK tr55s' in,to replace the Autolites Waller put in last summer(with my vortecs). after a few hundred miles,im ready to go back to Autolites(104). They were buring perfect,best idle soo far..
havent tried any AC Delco stuff yet.
 
littleblackpsycho

littleblackpsycho

Donating Member
Re: spark plug ?

For some reason my truck likes the stockers tried the ngks 5, and 6 will barely run, tried different gaps from 28 to 38 also still runs the same. Throw a set of cr42ts in there and it purrs like a kitten. Maybe my coil is getting weak or something since I have new wires, cap, and rotor.
Thanks
 
A

atlantasy

Member
Re: spark plug ?

the "C" stands for copper core.... it is in the front of the spark plug catalog how the plug breaks down:
c- copper core
r- resistor type
42- heat range
t- tapered seat
s- extended tip
 
clone 94

clone 94

New member
Re: spark plug ?

does any one run a non-projected tip plug like the R5671A-7 or 8, stocking number NGK 4554? from my research, a projected tip is a hot spot for causing detonation.

i'll be trying out the 4554's very soon

edit: btw these plugs are for vortec heads
 
Last edited:
You must log in or register to reply here.
Top