Plug Question / Suggestion

I run a stack injected altered BBC runs mid 8's, currently running # 9 NKG plugs..The plugs are pretty white when pulled, would anyone suggest to go to a hotter / colder ? or keep the # 9's ? and If I fatten it up a bit what plug would be suggested ?

 

I have a stack injected BBC on alky fat fat tune ran 8.64.@151.00 1800lbs
you want to run NGK #8 cut the seal ring off if using after market heads.
I will run low 8`s later this summer

NGK R5671A-8 #4554


Vic

 

Not running after maket heads, Steel Chev which uses the tapered seat..But you think I should change to a # 8 ?

 

What do you mean plugs are pretty white ????
on the threads,..or the porcelin is still new looking ???

 

Yes porcelin lookin almost new, running really clean ...looking at fatten it up a bit, but wanted to see if a hotter or colder plug would be needed

 

Do you have a egt/ exh temp gauge ??? what does it say
If they are looking new that says its too fat, and would need to take more fuel away....but then again if you are to lean it may not want to show any heat also. Have you seen any marks on the ground strap, if so were is it ??
What injection set up do you have ??,.pump size /nozzle size/2nd by pass
Main jet/ High speed yes/no.

or just call me,..
Vic
.541-806-1072

 

Here is my motor combo,......

N/A BBC 505 CI,.... ON ALCOHOL,..
4.350 bore X 4.250..stroke 13.3 COMP W/.043 HEAD GASKET
...12.95.1 W/.056 HEAD GASKET
69 CHEVY 427/454 BLOCK,
DART PRO 1 CNC 335 2.30/1.88 MILLED .020 115.0 CC CHAMBERS
SRP FORGED PISTONS 43 CC DOME C/H 1.270
ERSON CUSTOM GRIND CAM 817/774. @ .050 280/288 310/314 112 LC
HILLBORN 2.5 STACK INJECTION BY SPUD FIE
NOZZLES Hillborn 22A THRU 24A
SECONDARY BY PASS
MAIN, .085 THRU .130
High Speed, .065-.075
VERTEX 5.2 AMP MAGNETO BY SPUD FIE
ENDERLE 110 FUEL PUMP W/.170 SIZER
TRANS SPECIALTIES PROLINE 5000 2 SPEED POWERGLIDE 1.80 FIRST
A-1 9 INCH CONVERTER 5200 STAHL
OLDS/PONT 4.56 GEARS
GOODYEARS,..35.5X17X16
1800 LBS WET

 

What does the blue line "timing line?" look like on the NGK 6061-10 where the ground strap isn't turned?

 

what's your ing. timing at???? Mike