Cylinders 1&2 colder than 3&4 and lack of power

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Vic Skirmants
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#31 Post by Vic Skirmants » Tue Oct 16, 2018 7:50 am

Add an extra spark plug gasket.

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C J Murray
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#32 Post by C J Murray » Tue Oct 16, 2018 9:11 am

Vic Skirmants wrote:Add an extra spark plug gasket.
That could expose a thread in the cylinder head spark plug hole which could lead to a hot spot and detonation while pulling those long straights at Le Mans.

It is better to use the plug that fits your engine.
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Vic Skirmants
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#33 Post by Vic Skirmants » Tue Oct 16, 2018 9:23 am

Do it on the race engines every time.

Dick Weiss
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#34 Post by Dick Weiss » Tue Oct 16, 2018 10:14 am

No problem adding the 7mm braided fuel hose to 8mm steel lines as long as there aren't any sharp 'burrs' on the ends of the lines.
Also using a little Syl Glyde (not oil) for ease of insertion; Once on, I don't use/need clamps and just use hose end caps w/o crimping.

Bosch W6BC spark plugs have extended tips.

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C J Murray
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#35 Post by C J Murray » Tue Oct 16, 2018 10:28 am

Vic Skirmants wrote:Do it on the race engines every time.
You don't race at Le Mans.
'57 Speedster
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'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
'67 911 S Original Owner

Miguel Antonetti
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#36 Post by Miguel Antonetti » Tue Oct 16, 2018 11:26 pm

I decided to add a smashed down washer, went for a ride and all the symptoms went away... prrrrrreeeeettycool!

So I'm gona try the NGK... Which one is hotter B6HS or B7HS?

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C J Murray
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#37 Post by C J Murray » Wed Oct 17, 2018 6:58 am

6 is hotter than 7
'57 Speedster
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'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
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Vic Skirmants
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#38 Post by Vic Skirmants » Wed Oct 17, 2018 7:54 am

I just love spark plug makers. One has the smaller number as hotter, and another has the smaller number as colder!
Go figure.

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C J Murray
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#39 Post by C J Murray » Wed Oct 17, 2018 8:00 am

Use surface gap plugs, they have no heat range.
'57 Speedster
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'60 Devin D Porsche Race Car - Finally Finished!
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#40 Post by Miguel Antonetti » Tue Nov 06, 2018 12:07 am

The car is running strong...:)
CJ what surface gap plug would you recommend? I definetely would like to try it.

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C J Murray
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#41 Post by C J Murray » Tue Nov 06, 2018 7:49 am

Miguel Antonetti wrote:The car is running strong...:)
CJ what surface gap plug would you recommend? I definetely would like to try it.
I use 12mm plugs so I found a Champion surface gap plug that works. I wouldn't use a surface gap plug on a street engine. I don't think it has enough "range" for all the various street conditions. If you try one for street use let us know what happens. I suggest using a very strong ignition.
'57 Speedster
'59 Sunroof
'60 Devin D Porsche Race Car - Finally Finished!
'63 GS 2133 coupe
'64 Elva Courier mk4T
'67 911 S Original Owner

Miguel Antonetti
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Re: Cylinders 1&2 colder than 3&4 and lack of power

#42 Post by Miguel Antonetti » Thu Nov 08, 2018 2:45 pm

Many thanks CJ!
My engine is stock with the exception of the webers... soooo your answer placed this "try" ways low in the priority list...:)

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