Spark Plugs - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

rbraine · 05-09-2004, 04:14

Hi, whats the best set of plugs to use in a XAGT 4v big port cleveland with 780 holley D/P running on optimax premium unleaded with lead suppliment? any help would be appreciated. thanks.

Wolf159 · 07-27-2004, 05:11

Try Splitfire plugs, used them in my XB, had the same set of plugs for about 4 years now, never had a problum with them...

TTNOS8 · 07-27-2004, 21:02

When you say the best, a few things come to mind.

The BEST plugs or the best VALUE plugs?

I've personally had no problems with your run of the mill NGKs running a clevo on nitrous.

Late last year I installed a set of 'NGK Iridiums' and although they were dearer than normal, they seem a good plug.

Each to their own though

STROKEXD · 07-28-2004, 02:07

Clevelands love NGK plugs. Stay clear of Champion but Bosch are OK also.

If the motor is worked and sees a fair bit of WOT then go for the colder NGK BP7FS plugs, otherwise BP6FS were recommended fittment to that year clevo.

xdclevo · 07-28-2004, 02:18

I found BP6FS good for a well set up motor, and if an overly rich motor with too big of carby a BP5FS. Be carefull with the hotter #5 plug. If using wide open throttle mostly, go colder, or if driving more steady where fouling plugs are common, go the hotter.

ESP · 07-28-2004, 23:15

Check these Spark Plugs

I use them on my Clevo and they are awesome.
They outperformed all the NGK's BP6fs and BP5fs on the DYNO

They last forever , work unreal with the Hi6R i'm running.
The DYNO guy was impressed.

STROKEXD · 07-29-2004, 02:37

ESP what did they cost you and where locally did you get them from?

ESP · 07-29-2004, 03:02

Unfortunately they are only available from the USA.
I paid @ $AUD 22.00 each, but that was at the exchange rate 6 years ago.

Yep, that was 6 years ago and these things are still going strong.
I rang them, gave them the specs of the car, and the current plug I was using. They cross referenced with their own spec chart and shipped em out to me.

I can only comment from my own personal experience.......but these things work really well, especially with a HIGH output Ignition system.

STROKEXD · 07-29-2004, 03:25

Cheers for that

Racer · 07-29-2004, 03:52

Quote:

Originally Posted by xdclevo

I found BP6FS good for a well set up motor, and if an overly rich motor with too big of carby a BP5FS. Be carefull with the hotter #5 plug. If using wide open throttle mostly, go colder, or if driving more steady where fouling plugs are common, go the hotter.

Excellent advice!