what plugs to run with 18* heads

[Camaro_Dave]

so yeah, like it says, what should i run?
408
13:1
bow tie 18* heads
need more info just ask

[Chris Uratchko]

Autolite AR3932s, or AR3910s which are extended tip plugs.

NGK -7 or -8... I think the prefix is r5671 but not sure.... been a while since I ran ngk.

[Camaro_Dave]

alright i'll check em out.

[mrhockey]

That's the correct prefix Chris. I use 5671-9 in my nitrous SB2 motor.

[Camaro_Dave]

so is the -7 -8 like the heat of the plugs?

[mrhockey]

Yes. With NGKs the lower the number the hotter the plug. Autolites are the opposite.

[Camaro_Dave]

thats what i was guessing about NGK's. so for a simple 13:1 408 18* (4500+ft elevation) what a good one? -7 -8 is what chris said. is the elevation going to change any of that?

sorry for being such a rookie. this is my first stab at building something wild. stuff before this was 11:1 292iron headed 355 :WGAF

thanks for your help guys

[Chris Uratchko]

For normally aspirated, if you're using decent fuel I'd use -7 or -8... stick with 8 if you're nervous....

[Camaro_Dave]

cool thanks

[mike gerlach]

hey mark...

so what was the deal with the motor, bearing problem soved?

mike

[mrhockey]

Hey Mike. I actually saw your post about octane and compression last night on the other board and was going to drop you a line. The oiling problem seems solved. I put a spin on adapter on with -10 line instead of the -12 and put a Fram HP-4 on it. That's what Jensen insisted on. I tried a Wix/NAPA racing but noticed a 5lb. pressure drop so I switched back since I didn't want any issues that he didn't approve of. I have had the trans out a couple of times in the last couple of months. I went a 9.01 a couple of weeks ago and won the True Street class at the Pro/Edelbrock race with a 9.09 average for 3 runs. I am heading to Atco on Sunday I think. How are you making out?

[mike gerlach]

so it was in the filter?..... glad to hear you have that solved....

My project is held up right now, but hopefully soon...........

CONGRATS on the win.......(maple grove right?).I was there saturday to watch, but the rain was too much.....left early.

Are you heading out to the national event this weekend....I'll be heading down Friday....

mike

[mrhockey]

I guess it was the filter. So far sooo good. I will be at the nationals Friday to Sunday if all goes well. I live too close not to go. Give me a call. 610-476-4014 and maybe we can hook up.

[mike gerlach]

sounds good..........I'll be there aroud 10:30 or so.....I'll give you a call


or you can hit me on my cell tonight 610-730-5657
mike

[mrhockey]

Will do Mike. Just got my tickets for Sunday comped so it looks like I still have to pay for Friday and Saturday. If you know anyone looking for a super clean 2500HD with 15,600 miles on it let me know.

[Camaro_Dave]

so back to plugs. what about the NGK R5672a?

[mike gerlach]

sorry about hijacking the thread ......oops..

[Camaro_Dave]

its cool dude