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Author Topic: Another sparkplug question...  (Read 7016 times)
Erlend / bug66
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« 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?
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Old Guy
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Barrett Racing Pro Gas 10.75ET 123.18MPH


« Reply #1 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
« Last Edit: May 20, 2013, 00:40:39 am by Old Guy » Logged

Old Guy
Erlend / bug66
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« Reply #2 on: May 20, 2013, 00:51:15 am »

I run 98octane
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
Old Guy
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Barrett Racing Pro Gas 10.75ET 123.18MPH


« Reply #3 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).
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Old Guy
Erlend / bug66
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« Reply #4 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.
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
Jon
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« Reply #5 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.
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Erlend / bug66
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« Reply #6 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  Grin
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The '67:
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10.221 @ 135mph, SCC 2018

The '59:
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richie
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« Reply #7 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
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Erlend / bug66
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« Reply #8 on: May 21, 2013, 12:58:22 pm »

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

Ordered a set of both, and will try the 8's first to see how it feels
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
Jon
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« Reply #9 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.
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Erlend / bug66
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« Reply #10 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 Smiley

In that direction Tongue
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
dragvw2180
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« Reply #11 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
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BeetleBug
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« Reply #12 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.
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Erlend / bug66
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« Reply #13 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 Smiley

I will take a picture the next time I am in the garage.
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
Erlend / bug66
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« Reply #14 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.







Pretty tight..
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The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
Old Guy
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Posts: 52

Barrett Racing Pro Gas 10.75ET 123.18MPH


« Reply #15 on: May 23, 2013, 21:58:31 pm »

Wow Erland, that is tight!  Shocked Let us know how the D8EAs work out.  What gap do you normally run?
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Old Guy
Erlend / bug66
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« Reply #16 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! Cheesy
Logged

The '67:
10.626 @ 132mph, SCC 2016
10.407 @ 134mph, SCC 2017
10.221 @ 135mph, SCC 2018

The '59:
Not yet..
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