XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

V12 plug leads

Thread Tools
 
Search this Thread
 
  #1  
Old 07-31-2021, 12:06 PM
brinny's Avatar
Veteran Member
Thread Starter
Join Date: Sep 2015
Location: Yorkshire U.K.
Posts: 1,296
Received 424 Likes on 251 Posts
Default V12 plug leads

Any recommendations for a good set of plug leads for a v12 and uk supplier please.
 
  #2  
Old 07-31-2021, 12:19 PM
VancouverXJ6's Avatar
Veteran Member
Join Date: Oct 2015
Location: Vancouver
Posts: 1,235
Received 537 Likes on 364 Posts
Default

https://www.formulapower.com/product...rformance-set/

I used these, they are excellent but a tad tight to push on (probably better then floppy loose) and definitely noticed smoother operation vs my old ones which were probably several years old.
 
  #3  
Old 07-31-2021, 12:32 PM
Doug's Avatar
Veteran Member
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,766
Received 10,800 Likes on 7,120 Posts
Default

I duuno what's available in the UK.

I've been running Bosch brand on my V12 for a few years now. All's well.

Years ago, on my XJS V12, I ran OEM Rists wires for a few years. No complaints. Later I used some performance oriented wires (can't remember the brand) and noticed no improvement in running for the extra money spent.

Magnacore brand is popular with many V12 owners. High grade stuff, but rather expensive!

Cheers
DD

Cheers
DD
 
  #4  
Old 07-31-2021, 02:31 PM
BenKenobi's Avatar
Senior Member
Join Date: Aug 2020
Location: UK, Glossop
Posts: 933
Received 572 Likes on 354 Posts
Default

I'm a Magnecor user - 8.5mm version - V12 needs all the help it can get due to the compression ratio - purchased from Larkspeed whether they're expensive depends on how you value things I guess.
 
  #5  
Old 07-31-2021, 06:38 PM
Doug's Avatar
Veteran Member
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,766
Received 10,800 Likes on 7,120 Posts
Default

Originally Posted by BenKenobi
Larkspeed whether they're expensive depends on how you value things I guess.
Naturally

As the decades roll by I increasingly find myself valuing actual results quite a bit. I've found that, often as not, the extra money spent doesn't provide me any real world improvement or tangible benefit. In the case of plug wires, for example, the Bosch wires I installed several years ago are doing the job perfectly well and were $50. I'm not quite convinced that spending $150 for Magnacore would be money well spent.

Besides that, my V12 is my daily driver/commuter car. I have to save money whenever I can

Not knocking Magnacore, mind you. They have a great reputation.

Cheers
DD
 
  #6  
Old 07-31-2021, 06:58 PM
BenKenobi's Avatar
Senior Member
Join Date: Aug 2020
Location: UK, Glossop
Posts: 933
Received 572 Likes on 354 Posts
Default

I think that the elements that made me use Magnecore (in particular the KV85's) was simply the newer technology, improved thermal tolerances, improved performance under load (designed for race etc) - and a 10 year warranty.

Standard leads are fine, not saying they aren't, I guess it is all about how they will be used (i.e. how much and what kind of driving), indeed if you look at the materials used for even the injector harness they simply aren't suitable for the ambients in the environment presented within the V of the V12, PVC insulation doesn't like continuous temperatures beyond 70°C - and I can assure you that the valley temperatures exceed that significantly when cruising, it is even worse when stuck in traffic. If you use standard leads just plan to replace them periodically then they will be fine (presumably).





 

Last edited by BenKenobi; 07-31-2021 at 07:03 PM.
  #7  
Old 08-01-2021, 02:14 AM
brinny's Avatar
Veteran Member
Thread Starter
Join Date: Sep 2015
Location: Yorkshire U.K.
Posts: 1,296
Received 424 Likes on 251 Posts
Default

Thanks lads
 
  #8  
Old 08-01-2021, 03:39 AM
Greg in France's Avatar
Veteran Member
Join Date: Jan 2012
Location: France
Posts: 13,362
Received 9,124 Likes on 5,372 Posts
Default

Originally Posted by brinny
Thanks lads
Brinny
You could try Mr Retro Leads:
https://mrretroleads.co.uk/

I bought some of his 8 or 8.5mm mm ones, precisely the same as magnacore and half the price. Very good indeed. Formula power also very good. Both UK firms.
Greg
 
  #9  
Old 08-01-2021, 08:05 AM
BradsCat's Avatar
Senior Member
Join Date: Sep 2016
Location: VA
Posts: 789
Received 322 Likes on 228 Posts
Default

The OEM wires were 7mm. Several years ago I ran a test in the garage with all the lights off and was shocked to see the amount of arc'ing around the distro and wires. Converted to 8mm (can't remember the brand, blue with red plug tips) and the arc'ign was immediately gone.
 
The following users liked this post:
Greg in France (08-01-2021)
  #10  
Old 08-02-2021, 02:09 PM
brinny's Avatar
Veteran Member
Thread Starter
Join Date: Sep 2015
Location: Yorkshire U.K.
Posts: 1,296
Received 424 Likes on 251 Posts
Default

Originally Posted by Greg in France
Brinny
You could try Mr Retro Leads:
https://mrretroleads.co.uk/

I bought some of his 8 or 8.5mm mm ones, precisely the same as magnacore and half the price. Very good indeed. Formula power also very good. Both UK firms.
Greg

Thanks greg
 
  #11  
Old 08-02-2021, 02:10 PM
brinny's Avatar
Veteran Member
Thread Starter
Join Date: Sep 2015
Location: Yorkshire U.K.
Posts: 1,296
Received 424 Likes on 251 Posts
Default

Originally Posted by BradsCat
The OEM wires were 7mm. Several years ago I ran a test in the garage with all the lights off and was shocked to see the amount of arc'ing around the distro and wires. Converted to 8mm (can't remember the brand, blue with red plug tips) and the arc'ign was immediately gone.
Interesting. 8mm it is then.
 
  #12  
Old 08-02-2021, 03:23 PM
ronbros's Avatar
Veteran Member
Join Date: Jul 2010
Location: Austin tx and Daytona FL.
Posts: 7,362
Received 1,234 Likes on 941 Posts
Default

my wires are 26yrs old , so far perfect no problems, nice long push on plug end to keep spark leak down(nonexsistent), and cut to fit length into distributor!
plus a a good look for eye ball enjoyment!

 
The following users liked this post:
Dukejag (08-03-2021)
  #13  
Old 08-08-2021, 03:49 AM
FinCat's Avatar
Member
Join Date: Oct 2019
Location: Southern Finland
Posts: 46
Received 44 Likes on 23 Posts
Default

Originally Posted by ronbros
my wires are 26yrs old , so far perfect no problems, nice long push on plug end to keep spark leak down(nonexsistent), and cut to fit length into distributor!
Not straight answer to original question, i have yellow Accel Race 300+ leads on my P38A Range. Bought long time, +10years, ago and still going strong, only negative thing is you need to build them from kit as Ron said.
My mate had same leads on his 360 Mopar, leads often hanging on exhausts manifolds but no harm done.

Personally i wouldn't put yellow leads on stock V12 engine bay... think they will scream attention just too much.
 
  #14  
Old 08-08-2021, 11:04 AM
ronbros's Avatar
Veteran Member
Join Date: Jul 2010
Location: Austin tx and Daytona FL.
Posts: 7,362
Received 1,234 Likes on 941 Posts
Default

i have painted my personal engines RED since 1949!
if it dont go Fast make it look good!!
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
olivermarks
XJ6 & XJ12 Series I, II & III
0
02-17-2018 07:59 PM
Andreas Schmieg
XJS ( X27 )
0
01-27-2017 07:15 PM
tizzle
XJ6 & XJ12 Series I, II & III
2
12-08-2011 06:33 PM
velder
XJ6 & XJ12 Series I, II & III
2
07-06-2011 01:28 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: V12 plug leads



All times are GMT -5. The time now is 10:54 PM.