ZONES89RS

iTrader: (25)

Is there a acceptable plug that cross references witht he BR7EF? I find allot of them, but not the actual BR7 itself, spraying 150 on the 5.3 liter in my 86 TA, dedicated fuel cell with AV gas(aviation fuel) that is 100 octane and 93 in the tank, pulling 6 degrees.

I am assuming not all plugs are created equil and i dont want to use the TR6 that is easy to finde, i want to use a non projected tip.

Graham@NitrousOutlet

Any parts store should be able to order them. They can usually have them there the next day. If not let me know I can send them out too you.

Graham @ N20

87silverbullet

iTrader: (11)

The br7ef cross reference for Autolites is a 103. I used to use them in my turbo regal and Wal-mart sells them and keeps them in stock.

Graham@NitrousOutlet

Autolite 103 plugs are very close to a tr6. Projected tip and 1 heat range colder. Not nearly a good a plug for nitrous use as a br7ef.

Graham @ N20

ZONES89RS

iTrader: (25)

Alright, thanks Graham, i am on a want it now basis but i can wait a day, LOL.

Graham@NitrousOutlet

You should be next day from us. We are in Waco.

But I agree.

Graham @ N20

87silverbullet

iTrader: (11)

Didn't know that about the Autolite 103's. I guess its just like the TR6 older technology.

Zones I don't know if you are up for a drive but the O'reilly's in Spring and Humble around you have them. You might want to give them a call if you're in a rush for them.

Chris@NitroDaves

It's still a projected tip plug but if you wanted a matched heat range to the 7's then you will need some Autolite AR94's.

camscam02

iTrader: (21)

here is what I came up with

Autolite AR3935 Non-Projected 2 steps colder w/ NON-projected tip. Non-Resisted.

ZONES89RS

iTrader: (25)

Sweet, I will use a autolite if they are the same quality,otherwise, I will see if they have them in humble while I am here.

Graham@NitrousOutlet

I have been meaning to try these on a car with the same tune up back to back with a br7ef. Curious to how the plug will differ. I have never had a good Apples to apples look at that plug. I should try that once I get my car back together.

Graham @ N20

ryarbrough

iTrader: (18)

Be careful with the autolites. In my experience with them, which is admittedly limited, they are a little harder to read.

Chris@NitroDaves

I agress and they tend to foul out easier IMO.

camscam02

iTrader: (21)

they also use a harder electrode that if you nip a plug wont be very gentle on the motor. Sometimes you can get away with nipping an NGK from what I have seen.

ZONES89RS

iTrader: (25)

I ordered the NGKs from Oreilly, they will be here tomorrow, but they said the cross reference number for the NGK they has was a 335? Or so something like that.

hotrodsgmoney

remember to use ONLY short probe spark plugs when running nitrous.In a ngk it would start w/br & end in ef

hotrodsgmoney

I'm under the standing when using nitrous you want a short probed plug??hotrodsmoney

hotrodsgmoney

I'm under the impression when using nitrous run a short ground strap plug v/s the extended(long)ground strap style plug.HELP hotrodsgmoney

LilJayV10

iTrader: (39)

Thanks for that.

On a separate note for some reason I can't get the BR7EF's at Auto Zone. A friend of mine is the manager and for some reason they can't. However I have ordered them from Car Quest in the past and they now stock them.

Zone, I'm assuming you've tried other parts suppliers or does no one have them?

ATVracr

iTrader: (5)

Been there, done that.

Take the strap off an Autolite and your motor is HURT !

Take strap off of an NGK and 50/50 chance it will be ok.