Thread: what plugs and gap.

well going over my car that i got fixing all the issues i can find. here is a sort list of mods. what plugs should be in the car and what gap? cars on a 2.75 pullie about 17psi

- Gen V Supercharger 17psi, Thrasher-Performance Modular Interchangeable Pulley System
- 75mm North Star Throttle Body, 85mm LS6 Mass Air Conversion
- 4 inch Air Intake
- 42.5 lb Injectors
- Alcohol Systems Methanol Injection System
- DHP Computer
- Pacesetter 1-3/4 Race Headers with 3 inch Downpipe, Dual 2.5 Tailpipes w/ Flowmaster 40 series Mufflers
- ZZP Performance Full Stack Stage 2 Liquid to Air Intercooler with Stage 2 Heat Exchanger and Cooling Fan added
- ZZP Performance 1.9 Modded Rockers
- ZZP Performance Under-drive Water Pump Pulley
- ZZP Performance Alternator Amp Booster
- New ZZP 10.3 Wires

Serious?

Put a 3.2 on there.

Plugs would be 103's gapped at 0.035 if you could run that much boost.

i run NGK TR6 gapped at 35, never was crazy about autolite.
Matt is right way too small of a pulley for your mods, bigger pulley with more timing will make more power

lol from what i been seeing yea pulley is next on the list. im just trying to go threw this car and fix one thing at a time. just got oil to stop leaking, oil level sensor changed, intercooler pump changed, next is getting rid of msd coils, check and change plugs if i need to

it seems to run the boost fine from what i see. it knocks here and there around 60-80 mph like spots of 1-5. but it could be tune related. im throwing wideband on in the next couple days. i plan to go to maybe a 3.0? or 3.2? think that would work better for my setup ?

well i did more work . on 75% throttle it wont knock at all entire pull. full throttle it knocks higher rpms. so i just checked whats in the car. i got 103s but there gapped at .45 so i wonder if this could be my random misfire. im going to change them to .35 and just get new plugs while there out. and then i will change the msd coils to stock and see what happens. i measured the pulley to and seems to be a 3.0 but im about to make a new thread for that .

Stop making new threads.