Another sparkplug question...

[Erlend / bug66]

Hi

Need some pointers..

1915
Wedgeports
Almost 12-1
IDA's
86C + 1,4

Been using D7EA's but wondering if they are cold enough.

I need to remove fanshroud, oilcooler and tins to remove intakes so I can change plugs, so I can't just swap it out in a few minutes..

I have a new set of 7's and 8's. Which to put in?

[Old Guy]

We Run D8EAs in our 2332cc ProGas car with nearly 15 to 1 and C-12 race gas.  If you run C-12 or better race gas the D7EAs ought to be cold enough.  If you see any little black flecks on the white nose then the plugs are too hot.

Ron Barrett

[Erlend / bug66]

I run 98octane

[Old Guy]

I run 98octane

I think you still would be OK with the D7EA..  Just look for those black flecks I mentioned.  By the way is that 98 Research Octane, Motor Octane or Research + Motor divided by 2 (like they post on the pumps here in the US).

[Erlend / bug66]

I run 98octane

I think you still would be OK with the D7EA..  Just look for those black flecks I mentioned.  By the way is that 98 Research Octane, Motor Octane or Research + Motor divided by 2 (like they post on the pumps here in the US).

Ok, thanks!

Don't know the difference, but we get 98 octane on pump in Norway.

[Jon]

In Norway and Europe we use Research Octane Number. The 98 Ron should translate to a 95 ron+mon/2 value.

[Erlend / bug66]

Think I will try a set of 8's..

it only takes 2 hours to change plugs 

[richie]

I have run NGK 7s with 10.5/1 and 80hp of nitrous on shell optimax  and also with 9/1 and 18lbs boost and saw no signs of detonation on the plugs, you really need to be able to access the plugs easier to be able to know for sure, a plug chop after a full pass gives so much information. I made some cylinder tins that the end that you access the plugs through was removable and this cuts the time needed but 75%, I am not sure if it would solve all your problems with those short manifolds or not though

cheers Richie

[Erlend / bug66]

There is no chance in h**l to change plugs without taking the manifolds off

Ordered a set of both, and will try the 8's first to see how it feels

[Jon]

I made a special wrench out a modified socket, once I get the plugs loose I can undo them with my fingers.
And I also split the sheet metal like Richie says.

[Erlend / bug66]

There is just no room. Not even with a turned down socket. The plugs will hit the manifold. I need to pull shroud, alternatorstand, cooler etc to remove sheetmetal then manifolds

In that direction

[dragvw2180]

   If you do not mind modifying your body,  alot of people install removable windows in the quarter panel to gain access to the plugs easilly. With the windows removed you have a straigt shot at the plugs with an extension and socket. This is what I am talking about.

http://ebasic.easily.co.uk/01101C/024024/hipacshowto.html

                           Hope this helps, Mike McCarthy

[BeetleBug]

Erlend, please take a picture in order to show people what your spark plug problem is. As I remember, your short manifolds dont allow you to use any tools and in order to get your manifolds off you need to strip your engine to a long block.. basically.

[Erlend / bug66]

Erlend, please take a picture in order to show people what your spark plug problem is. As I remember, your short manifolds dont allow you to use any tools and in order to get your manifolds off you need to strip your engine to a long block.. basically.

You are right

I will take a picture the next time I am in the garage.

[Erlend / bug66]

Here is some photos from today. I installed a set of 8's and will try them out.







Pretty tight..

[Old Guy]

Wow Erland, that is tight!  Let us know how the D8EAs work out.  What gap do you normally run?

[Erlend / bug66]

This set was set to .7mm.

Same for the 7's. Seemed to work fine, but I could be way out on the field!