NGK Sparks plugs for X Flow

[eric]

Hi everybody

 

My 1600 sprint engine was running with NGK BP7EVX wich are platinium plugs

The running was good, smooth but after some trafic jams

this plugs were dirty very quickly, peef, paf, poof until you find a large nice straight line (don't dream there is often a radar hidden at the end)

 

With BP7ES everything is normal (caterham advise)

The 1700 supersprint owners uses NGK BP8ECS (colder)

 

The french racer use Champion N6CC (double cc for copper core)

I tried them, the running seems harser and sound more race.

 

Who can give me some advis on this subject ?

[domster]

Roger King is best placed to answer this, but I used BP7EVs if I remember correctly, in my 1700 SS.

 

I wouldn't fancy going down to 6 heat rating plugs, just in case.

 

I think the 8s would foul in general use - worse than the 7s I should think.

 

Maybe see if Champion do the copper core in a 7 rating?

[Nick M]

I used to use B7EV plugs in mine. The P means the electrode protrudes slightly which may or may not be a problem depending on the pistons you're using and the amount of clearance needed.

[Graham Sewell]

In my 1700 supersprint I run either BP6ES or N9YC. Both of these work well and were shown to be the correct temperature on a rolling road. However, my mains are larger than the standard Caterham recommendation (as per Dave's web site) and again tested at Dave Walkers and documented in CCC.

 

YMMV,

 

Graham

[EFA]

DANGER!!!

 

N9YC's will melt in a 1700cc 234 Cammed Caterham Spec Xflow. Thye did in mine when it was new.

 

N7's are the coolest Champion plug you should use in a tuned crossflow.

 

Better still use NGK!

 

Fat Arn

The NOW PROVEN R500 Eaterid=red>

See the Lotus Seven Club 4 Counties Area Website hereid=green>

 

 

Edited by - fat arnie on 1 Nov 2001 13:29:30

[Roger King]

BP7ES is probably the best plug to run in a Sprint; they're cheap and easily available. The projecting nose is no problem and at least in theory gets the point of ignition nearer to the centre of the combustion chamber. 6s may be OK too, but not on track or when driving like a nutter (average 7 owner).

[Graham Sewell]

Roger,

 

Forgot to mention, I have a problem with plugs getting fouled up during the 45 minute drive through traffic before I get to a decent road - hence the 6's. Also, the car is never on a track and most speed limits are obeyed (am I the only one???).

 

Arnie,

 

The N9Y's were Len Unwin's suggestion when I discussed the above problem with him - so far no problems.

 

Cheers,

 

Graham

[EFA]

The N9Y used to be cross reffed in Champions books for a BP6. Look at the extremes of the temp range however and you will see these two plugs are quite diffferent!

 

Fat Arn

The NOW PROVEN R500 Eaterid=red>

See the Lotus Seven Club 4 Counties Area Website hereid=green>

 

[John Whyman]

Always used NGK B8ES cos thats what it came with. (standard 1700 S/sprint.) Is this plug o.k. I ask myself and those in the know? Its also rec in the caterham manual.

 

Doing service this week so any comments on a postcard please via Kabul, to arrive no later than T....hurs.

 

Ta

 

 

 

Happy Motoring. thumbsup.gif C7 WJW.

 

Edited by - John Whyman on 5 Nov 2001 14:42:20