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Cal-look/High Performance => Pure racing => Topic started by: Erlend / bug66 on May 20, 2013, 00:13:07 am



Title: Another sparkplug question...
Post by: Erlend / bug66 on May 20, 2013, 00:13:07 am
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?


Title: Re: Another sparkplug question...
Post by: Old Guy on May 20, 2013, 00:37:30 am
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


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 20, 2013, 00:51:15 am
I run 98octane


Title: Re: Another sparkplug question...
Post by: Old Guy on May 20, 2013, 08:18:48 am
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).


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 20, 2013, 08:21:47 am
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.


Title: Re: Another sparkplug question...
Post by: Jon on May 20, 2013, 08:33:07 am
In Norway and Europe we use Research Octane Number. The 98 Ron should translate to a 95 ron+mon/2 value.


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 21, 2013, 11:57:50 am
Think I will try a set of 8's..

it only takes 2 hours to change plugs  ;D


Title: Re: Another sparkplug question...
Post by: richie on May 21, 2013, 12:55:25 pm
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


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 21, 2013, 12:58:22 pm
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


Title: Re: Another sparkplug question...
Post by: Jon on May 21, 2013, 13:59:09 pm
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.


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 21, 2013, 14:03:21 pm
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 :P


Title: Re: Another sparkplug question...
Post by: dragvw2180 on May 21, 2013, 14:10:01 pm
   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


Title: Re: Another sparkplug question...
Post by: BeetleBug on May 21, 2013, 14:25:42 pm
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.


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 21, 2013, 14:27:59 pm
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.


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 22, 2013, 23:07:01 pm
Here is some photos from today. I installed a set of 8's and will try them out.

(http://www.raceinfo.no/temp/tn_image_85.jpg)

(http://www.raceinfo.no/temp/tn_image_86.jpg)

(http://www.raceinfo.no/temp/tn_image_87.jpg)

Pretty tight..


Title: Re: Another sparkplug question...
Post by: Old Guy on May 23, 2013, 21:58:31 pm
Wow Erland, that is tight!  :o Let us know how the D8EAs work out.  What gap do you normally run?


Title: Re: Another sparkplug question...
Post by: Erlend / bug66 on May 23, 2013, 22:07:02 pm
This set was set to .7mm.

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