Alternative Fuels Discussion and Tech on using alternatives such as E85 or Hydrogen or other fuels and/or supplements to Gasoline in Rotary Engines

Spark Plug Selection (E85)

Old 10-24-08, 05:22 AM
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Spark Plug Selection (E85)

I was wondering what heat range spark plugs is everyone using. I'm currently running unboosted with 9's but was not sure whether a 10 or 11 should be used. I would think with the cooling properties one should be able to get away with a 9's. Any thoughts?
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Old 10-24-08, 08:59 AM
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I am using 9's all around with a Jacobs FC2000 on the leading. No issues here.
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Old 11-25-08, 08:15 PM
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Anyone else running 10's or 11's and at what boost.
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Old 05-02-09, 10:45 PM
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Originally Posted by fritts View Post
Anyone else running 10's or 11's and at what boost.
I'm running b11EGV's at 28psi.
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Old 05-03-09, 02:57 PM
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While running E85 do you foul out those plugs if you cruise arround in the car to much without boosting?
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Old 05-04-09, 04:14 AM
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Alittle off topic but can you use stock FC ignition when running 500hp E85 13b?
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Old 05-04-09, 08:43 AM
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I have NGK BR8EIX(Leading) and BR9EIX(Trailing) for up to 20psi on a PT71GTQ. For more boost than that I use the 9's for leading and BR10EIX for trailing.

haven't had any issues so far and my engine is 10:1 Compression. Its up to around 500whp with the 8-9 combo @20-21psi with no issues. I have four LS2 Coils, one for each spark plug and I am now switching the two leading coils to MSD LS2 Coils.

Chris
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Old 05-04-09, 10:01 AM
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Originally Posted by Sindregutt View Post
Alittle off topic but can you use stock FC ignition when running 500hp E85 13b?
Well it takes a little more energy to ignite the alcohol than gasoline, so I would say no. Besides if you are spending the money to get the 500hp mark, why would you skimp on a $200 ignition box?
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Old 05-04-09, 02:21 PM
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Originally Posted by moremazda View Post
Well it takes a little more energy to ignite the alcohol than gasoline, so I would say no. Besides if you are spending the money to get the 500hp mark, why would you skimp on a $200 ignition box?
True true! i thought i might need some more than just an ignition box, but putting a MSD 6A on the leading will juice it up enaugh?
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Old 05-04-09, 02:38 PM
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All I have is a MSD 6AL and stock TII coils. Getting tuned in 30 days, running 13,440cc worth of injector and two M15 alcohol nozzles, not sure how far that will take me.

Gonna run the NKG 10.5 Advanced Auto Specials....
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Old 05-04-09, 08:12 PM
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Originally Posted by radkins View Post
I'm running b11EGV's at 28psi.
Hey Ryan, do you ever have issues with cold starts and/or foul out those plugs?
I got those race ngk 11s and fouled them as soon as it got cold out.


Originally Posted by Viking War Hammer View Post
All I have is a MSD 6AL and stock TII coils. Getting tuned in 30 days, running 13,440cc worth of injector and two M15 alcohol nozzles, not sure how far that will take me.

Gonna run the NKG 10.5 Advanced Auto Specials....
What is that part number for that, Eric?
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Old 05-04-09, 08:17 PM
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Originally Posted by Gohan3rdrift View Post
Hey Ryan, do you ever have issues with cold starts and/or foul out those plugs?
I got those race ngk 11s and fouled them as soon as it got cold out.
No, but I think 40deg ambient has probably been the coldest weather that I have tried to start it in.
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Old 05-04-09, 08:49 PM
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Originally Posted by moremazda View Post
No, but I think 40deg ambient has probably been the coldest weather that I have tried to start it in.
Are you talking about the 9s or 11s?
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Old 05-04-09, 09:05 PM
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Originally Posted by Viking War Hammer View Post
All I have is a MSD 6AL and stock TII coils. Getting tuned in 30 days, running 13,440cc worth of injector and two M15 alcohol nozzles, not sure how far that will take me.

Gonna run the NKG 10.5 Advanced Auto Specials....
What is the part# for those plugs
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Old 05-05-09, 08:05 AM
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Originally Posted by Gohan3rdrift View Post
Are you talking about the 9s or 11s?
9's
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Old 05-05-09, 10:11 PM
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Part numbers:

B11EGV #5831 $4.59 each
B10EGV #5927 $4.59 each



Has anyone had any problems using these with E85 and/or Methanol?
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Old 05-06-09, 08:34 AM
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I know someone who runs the B10EGV in his alcohol motor.... 750 hp
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Old 05-06-09, 09:38 AM
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Any idea what these should be gapped to?
Not gonna run a crazy amount of boost or anything...

Also, where did you guys buy the "thin wall socket"?
or did you modify a regular one?
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Old 05-06-09, 09:48 AM
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take a grinder to the socket
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Old 05-06-09, 09:54 AM
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That's what Steven Burkett did as well...
I just didn't want to compromise the integrity of the socket....
You know how buff I am.
Always breaking tools and what not.
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Old 05-06-09, 10:07 AM
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yeah, I over did mine and split it down the middle........ but it still works for what little torque spark plug needs
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Old 05-08-09, 07:48 PM
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Originally Posted by Viking War Hammer View Post
I know someone who runs the B10EGV in his alcohol motor.... 750 hp
Hey I know that person
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Old 05-13-09, 10:46 AM
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Im getting my car tuned on this friday with -> W31ES-ZU Denso plugs. Might be a shot in the dark but i found it in a subtitution list with B10EGV. I did consider the IW31 too.
Feel free to come with some inputs but ill know for sure on friday
I dont know much about this but isnt the B10EGV (denso;W31ES-ZU) shorter than the stock mazda NGK plugs? Is this something we have to have in mind while tuning?
(i got 4x1680cc so im not looking for high numbers :/ )
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