Z/28 coil
 

It is my understanding that a 69 Z/28 [img]/ubbthreads/images/graemlins/confused.gif[/img] cowl induction car uses a 270 coil and a non cowl car uses a 293 coil. Is this correct? If so, what is the difference? I have seen pictures of both and other than the numbers they look the same. Is the 270 shorter to clear the cowl breather? Surely the voltage requirements would not differ. Any way, hoping some of you more knowledgeable people can clear this up for me.

Re: Z/28 coil
 

I was trying to find out about the correct coil my '68.
From what I have been able to tell the 270 coil is for cowl induction '69 z's while the non cowl cars recieved the 298 coil. The 298 coil is what came with '68 z's also,
I have been told that some '68's came with a 293 coil maybe due to part shortages?
The z28 as well as all special high performance engine coils came with the ability to discharge & recover at a faster rate than a standard coil. I believe they call these high speed coils.
The 293 coil came with all standard small & big block V8 engines. I'd love to hear other opinions about this [img]/ubbthreads/images/graemlins/biggthumpup.gif[/img]

Re: Z/28 coil
 

Thanks for the info Rob, that makes sense. Now why is a 298 different from a 270 if the engine is the same other than one has cowl induction and the other does not?

Re: Z/28 coil
 

Sorry [img]/ubbthreads/images/graemlins/dunno.gif[/img]

Re: Z/28 coil
 

The coil assy # differs for a duct hood sb because of the bracket; it is the same bracket used with the 275/327. The coil is the same. It positions the coil approximately -5∫ vertical compared to the the standard bracket to clear the larger air cleaner assembly.

BBs don't require a different bracket.

Re: Z/28 coil
 

If you can find a Sun tune up chart it lists the coil number.

Re: Z/28 coil
 

Joe, They list #293 on the Sun Chart. 1969 got #298 coils, but I have seen unmolested cars with 293's. This is just one of many things that can't be explained. Sam [img]/ubbthreads/images/graemlins/dunno.gif[/img]

Re: Z/28 coil
 

I HAVE AN UNRESTORED Z WITH A COWL HOOD AND IT HAS A 270 COIL. I HAD A ORIGINAL FLAT HOOD CAR AND IT HAD A 424 COIL. THESE ARE THE 2 COILS I'M FAMILAR WITH FOR THE Z'S BUT I GUESS ANYTHINGS POSSIBLE... KP

Re: Z/28 coil
 

Never seen a 424 coil. Saw 298's and a lot of common 293's. Learn something new everyday. Sam [img]/ubbthreads/images/graemlins/headbang.gif[/img]

Re: Z/28 coil
 

Lots more good info fellas, but one question still remains. If the only difference in a cowl induction car and a non cowl car is the bracket why is the coil number different? If this was the only issue shouldn't they all have either 270 coils or 298 coils with a different mounting bracket? [img]/ubbthreads/images/graemlins/dunno.gif[/img]