Haans249

iTrader: (24)

Hello All,
Been on my new motor for 4K+ miles now, so I pulled the spark plugs , and decided to see what everyone thinks. I'm not an expert at reading plugs, so I'm wondering what the experts do think!

Motor specs are

427ci LS2 11.28:1 SCR
LS7 heads/intake
242/256 .646/.668 113+3 comp cams
Tuned by myself - WOT AFR set at 12.8-13.1 at 28 degrees timing no KR
EFILive COSv5 dual LC1's, Open Loop SD.

TIA,
Adrian

needadvice

pretty good.

what RWHP/RWTQ did it make?

Haans249

iTrader: (24)

500rwhp/450rwtrq on a mustang dyno with a terrible flowmaster 80 series, which is only good to 500 horse haha. I've done a couple other intake mods, new ARH 1 7/8, noticed higher map KPA's, and higher duty cycles when tuning, so probably closer to 510-515 or so rwhp. Also will be getting tru duals, 3" soon.

anyway, anyone else?

Grimes

iTrader: (3)

looks good. im assuming the flash made the plug look whiter than it really is?

Haans249

iTrader: (24)

A little, the tip is a little white, so it might be a bit lean.

dlove

iTrader: (23)

you need to pull a plug directly after a run (no driving on the return road) and then also get a pic of down the center

needadvice

were the heads hand ported or stock? what did they flow?

Haans249

iTrader: (24)

Heads are stock LS7 heads with Katech TI retainers and the PSI-LS1511 springs, with stock GM LS7 valves, stock GM rockers. Flow numbers are all over the forums, usually around 360 cfm at .650 lift for stock LS7 heads.