4drSupraT78

iTrader: (2)

Ok I have read every thread I can find on ls1tech and yellowbullet but haven't found an answer. I'm looking for the right spark plug for a 300 shot. I was told NGK B9EFS (#1085) would work but it is a non resistor type plug and will cause noise/interference with the ecu. I can't find a #9 cold plug that is a resistor type. What are you nitrous guys using for a 300 shot? Thanks in advance

WheelsUp84z

iTrader: (14)

been running 1085's on our vette.. no problems. This is on a 12:1 346 on a 250 hit.. 93 octane

4drSupraT78

iTrader: (2)

Seems like some people have misfire issues and others don't. The lack of info on this is unsettling. Any veteran nitrous racers or sponsors care to chime in?

NitrousExpress

iTrader: (4)

I have heard of a couple of people running theses plugs, but you do have a legitimate concern about the noise. You may want to give NGK a call and see what they say, their phone number is 877-473-6767.

-Garrett

87silverbullet

iTrader: (11)

Been using the b8efs and b9efs for years and no issues with any kind of interference.

4drSupraT78

iTrader: (2)

Just got off the Phone with Holley (the car has a holley dominator ecu) and they don't have an answer for this either. They recommend loading it up with dielectric grease and trying my luck.

ATVracr

iTrader: (5)

r5671a-10 ... gasket seat.
What we use.

brandon@nitrousoutlet

iTrader: (2)

NGK says that but we have used the b9EFS since the early days of the LS motors. What fuel, compression and how much power on motor?

4drSupraT78

iTrader: (2)

And you don't have an issue with noise/interference? Or have you done something to prevent it

ShiznityZ28

iTrader: (11)

You will not have a noise issue. we have run ~ 2000 of them thru 5 or so cars...

87silverbullet

iTrader: (11)

Shiz and ATV, that is a gasket seat plug. Does your head call for a gasket seat plug? As you already know LS heads are angle seat. Would there be an issue running gasket seat plugs on angle seat heads?

4drSupraT78

iTrader: (2)

No they don't call for gasket seat plug, they are stock LS casting heads. The plug ATV mentioned won't work for me but I asked him about the noise/interference because I see it is a non resistor style.

Shiz and others seem confident I won't have an issue, but if so many people are running these style plugs with no misfire issues why is Holley so concerned?

4drSupraT78

iTrader: (2)

Has anyone tried NGK VB05E spark plug resistor cover on a non-resistor style plug to reduce/eliminate noise?

WheelsUp84z

iTrader: (14)

If you have an old head laying around, you can tighten the gasket seal ones down on it and make it fit like a tapered seat plug. I know NGK does not make a -10 tapered seat plug so thats really the only way I know to get a plug that cold for an LS motor

Roger Blackmore

Seems to be an issue for some with the Holley ECU. Here is a post that got a lot of attention on bullet.

http://www.yellowbullet.com/forum/sh...d.php?t=584213

4drSupraT78

iTrader: (2)

Thanks for the response but I have already read that thread. There is a lot of discussion but no clear answer. Seems to always be the case on forums.

Roger Blackmore

You might want to post up on it for an update. I know the op has been running the car with the holly, but I don't know what plug he went with.

4drSupraT78

iTrader: (2)

Still can't find an answer to this. I have talked to many "experts" and they all seem to have something different to say. I am going to try the 1085 and see how the ecu reacts.