Another Spark Plug tread and belts

[kjoyes]

Hi i order some Bosch Ir Fusions #4503 for my svx and i was reading some tread here on spark plug heat ranges and they were saying bosch plug have too low of a heat rating that they cause problems with with in the combustion chamber?
? is the 10.0 the spark plug heat range for a svx?

Compression 10.0
Sequential multi-port fuel injection with dual spray injectors
Spark Plugs: Platinum-tipped NGK: PFR6G-11, PFR 6B-11,
NIPPONDENSO: PK20PR-11, Firing Order 1-6-3-2-5-4
Computerized management system with "Limp Home feature", over-rev protection, fuel injection and ignition monitors.
Idle speed 610 +/-100, 800 +/- 50 with air conditioning on
Timing BTDC 20° at 610

What is BTDC 20 at 610?
? top dead center?
6 New BOSCH Platinum IR Fusion Spark Plug FGR7DQI # 4503, Iridium Platinum, 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Interference Suppression Resistor, Surface Air Gap Plug, 4 Ground Electrodes9 ( haveing multiple electodes the spark will always jump to the coldest electrode. Why? The metal is denser at the colder electrode. So with having multiple electrodes you have a more reliable source of ignition for the air/fuel mixture in the combustion chamber, Iridium-Platinum Fused Center Electrode, .040" (1.02mm) Gap, ******Heat Range 7*****

example, Autolite Xtreme Performance spark plug XP3923
Description
Copper Core, Double Platinum, Fine Wire Center Electrode, Iridium Enhanced, Nickel Plated Shell, Trimmed Side Wire
*****Heat Range 11****

also, I am looking at belt Gate belt Micro-V AT Vs. Good year Gatorback?

[92snowmachine]

those bosch plugs should be good, if your engine is stock then you shouldn't have any problems. don't buy autolite plugs, they were actually sued recently to stop saying they sell platinum plugs because the platinum content was so low that it wasn't really true. they increased the amount of platinum coating to barely make it legal to call platinum. they are the taco bell of spark plugs.

don't buy gatorback belts, they won't last. they crack very quickly due to the design of the ribs.

btdc = before top dead center, 610 is idle speed. neither is supposed to be adjustable so it's pretty much irrelevant.