What spark plugs (& gap) is recommended when I install my NOVI-2k on my '92 LX? Also, what fuel pressure will be safe? I will be installing 42lb. injectors at the same time.
Printable View
What spark plugs (& gap) is recommended when I install my NOVI-2k on my '92 LX? Also, what fuel pressure will be safe? I will be installing 42lb. injectors at the same time.
Stock heads? Generally you want 1-2 heat ranges colder so something like an AWSF-32C Motorcraft should be fine(that's one range colder). Gap'em to .032-.035". It's also been my experience that Motorcraft and Autolite plugs work the best. Don't use platinum plugs.
39-40 psi vacuum off is a good place to start for fuel pressure.
I'm running Autolite Double Platinums right now on my N/A setup. I have TFS heads.
Someone told me to run Autolite 3922 plugs (35 gap) with the supercharger. Would those be right? So, don't run Platinums?
If you have TFS then you should run the following:
Autolite 3923's or 3924's
The 3924's are 1 range colder than stock. In most cases these are appropriate for street use.
The 3923's are 2 ranges colder than stock. Usually apprpriate for a street/strip car.
You can use the 3923's in your car but monitor how the car runs if you drive on the street. Lots of guys run this plug with success. I tried them in my car but it didn't like them...the car would foul the plugs driving around on the street and didn't run very smooth so I switched to the 3924's. The general rule is to run as cold a plug as possible that won't foul due to being too cold. Try the 3923's and see how they work and if it fould switch to the 3924's...the plugs are cheap so it's not an expensive experiment. The 3922's IMO are too cold...might work for a strip car but they will be too cold on the street.
Gap 'em to .032-.035 and yes...no platinum plugs with a blower...it even says so in your user manual.
Sweet, I appreciate it. According to UPS tracking, my Novi should be here next Thurs., which means it would get installed the following week.
Accoring to Trick Flow the recommended spark plug is a Autolite 3924 (http://www.trickflow.com/product/for...sted_specs.asp) as a "starting point". Why would they recommend a plug one heat range colder from the get-go?
I've been following a similar thread on Corral: http://www.corral.net/forums/showthr...hreadid=516615 and I'm confused as to what plug I should use on a Novi 2000 application at 10#'s. I'm installing my Novi and am currently running the 3924's N/A.
on a street driven car, I would use an AR3924 or AR3923. For a race only car, I like to use an AR3911 or AR3910.
What's the physical difference between a regular 3923 and an AR3923?
Should I get a blow-off valve?
You don't need it....the Novi 2000 comes with a bypass as part of the kit...it's all you need.
It comes in the tuner kit, too? I got my tuner kit in a few days ago, but only looked at the head unit and Power Pipe.
The AR series has a cut back electrode which is an attempt to expose more spark. Also, the 3924 have screw on spark plug wire connectors and the AR3924 permanently have the spark plug connector which is a big deal to me.
According to my sources it comes with a bypass valve.