Welp i FINALLY got my new 383 stroker from RaceRides.com

Here are the specs.

383 Stroker
Solid Roller Cam
specs : 242 / 242
.567 / .567
110°
10.25:1 Compression Ratio
Dart Iron Eagle Heads
D-Cuped Pistons
Weiand XCellerator Intake
Holley 800 Double Pump Carb.

Anyway, what spark plugs would you recommend? I plan to drive it mainly on the street....

 

Just stay away from platinums.....pure waste of money.

In my 305 I went with AC Delco Rapidfires @ .045 gap; which is actually larger than the stock rating which is .035. I've had no complaints what so ever with these.

 

i dont have a number for you but a rule of thumb is go one heat range colder for every point of compression you go up from stock. the best plugs to use are finewire platinum, the platinum prevents wear and the finewire centerwire reduces required voltage to make a spark. trust me, platinum is not a waste of money, i work for a spark plug company and i've seen the tests. i would start with a pretty cold plug and then after a while if it's fouled out move up a heat range. do this til your plugs dont get any darker than light tan. if you go with too hot a plug it'll preignite/detonate and ruin your new engine. ask the manufacturer of your engine what they recommend

 

thanks for the input..

i just wanted to add i have an accel hei ignition.

Any other comments on the platinum vs non platinum arguments?

 

AC Delco R43TS. Gap them at .045"

The only thing about platinum plugs is that they don't wear out as quickly. Regular spark plugs should last at least 5 years before needing replacing.

All the other "special" plugs are just bells and whistles to get you to spend more money.