boss79z

iTrader: (1)

Stock bottom end/ stock 241 heads, zo6 cam, e85, pt7675 manifold kit. 10 lbs Max for now with speed density tune. What plugs do you recommend?

westtexasbuff

iTrader: (40)

Ngk br7ef

AutomagicLS1

iTrader: (18)

Ngk br7ef

TermnEatr

iTrader: (24)

X3winnnner

SPRAYED 01

iTrader: (22)

What's the "tr8" part number?

boss79z

iTrader: (1)

Thanks. Hopefully have this car cranked in a week it two

JaYZeig

iTrader: (11)

x4!

this is what i run in my turbo lq4

HydroStream6

iTrader: (16)

br7ef here as well

I'd have to guess an 8 would be a br8ef?

95maroz28

iTrader: (21)

tr6 here. are you in sa by chance? stock lines? what pumps? just curious was thinking about running e85 on mine

9sectruck

iTrader: (9)

tr6 here on 22psi and 23deg of timing on pump with meth

Fbodyjunkie06

iTrader: (10)

22psi and 23* of timing on pump? Meth or not that's a lot of timing especially on 6 range plugs. Are you reading your plugs at all? Not just pulling them out randomly, but putting a new set in making a pass, shutting it down afterwards and reading them?

Isn't a br7ef a non projected tip plug? FI is supposed to utilize a projected tip plug from what I have read and heard, and nitrous utilizes non projected tip plugs.

9sectruck

iTrader: (9)

Changed 4 plugs at a time per pass, the strap did indicate that it was going a little too far advanced but the car was picking up mph, I stopped because I knew I was already pushing it to hard
94 octane with three meth nozzles 15,9,7gph straight meth

L-EATER

iTrader: (2)

I couldn't get the BR7's to work in mine. The non projected tip caused low speed misfires and horrible gas mileage. Had the same thing happen with a Lightning I had way back in the day. TR6's are working fine for me at 15lbs, meth and pump gas.

NicD

iTrader: (7)

BR7EF or BR7EFS

If you are having misfires and horrible gas mileage it isn't because of the non-projected tip plugs. These plugs are run in just about everything with no issues.

boss79z

iTrader: (1)

Yea I am in San Antonio. Lonnie's twin kit with stock lines etc. E85 with 80lb injectors. Shooting for 500 rwhp. Josh said the hotwire will be here tomorrrow.

boss79z

iTrader: (1)

Hotside.........coldside on the 26th.

SATAN

iTrader: (2)

Do you have a link or something you can post with that information? I would think a projected tip would NOT be desirable for FI. I would think if the tip was projected, it would essentially be sticking out like a sore thumb just getting hot and causing pre ignition.

NicD

iTrader: (7)

He posted incorrect information, non-projected is a race style plug and doesn't differentiate between nitrous and FI.

SATAN

iTrader: (2)

That is what I learned as well. I just wanted to see if there was information somewhere stating otherwise.

Fbodyjunkie06

iTrader: (10)

Sounds like you got it right, that's alot of meth.

NicD- So when do you know when to use a projected or non projected tip? Is it decided by fuel, psi, timing or compression? Just trying to learn something here, I always used projected tip TR6's.

Here is a good article I found in Car Craft, it's basically saying that projected tip plugs should be used, unless in a high boost racing type application. I guess it all comes down to what you are comfortable with and what you consider high boost, as I don't consider anything under 18-20psi high boost, again what you are comfortable with. I ran meth injection on my car and no more than 14-16* total timing at 15psi and 93/110 fuel. Those that don't want to read it, it basically says that a projected tip will allow timing to be reduced while still giving good or better throttle response with a lesser risk of detonation due to retarded timing. Then it says for nitrous most use a non projected tip plug. It's even saying some/most Top Fuel teams are using projected tip plugs albeit cut down. Interesting read for sure. Kinda what I have heard all along thus why I made the statement I did.

http://www.carcraft.com/techarticles...ips/index.html