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 |