04 Cold plug problem
Thread Starter
Drifting
Joined: Oct 2009
Posts: 1,385
Likes: 85
From: San Diego CA.
04 Cold plug problem
I installed a wet Zex nitrous system. I followed the recommended plug change for my stock LS1 and bought the Zex plugs. They say they are one step colder and are good for everyday driving. My car runs terrible and it stumbles and loads up at an idle. I have them gapped at .045. My question is has anyone had any trouble running the stock plugs with a 75 or 100 shot? The car has 17K miles and ran great stock, except for the fact that my son and I won 5 out of 18 1/8 mile runs! need a little extra. Any comments? Thanks......
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
You should run NGK BR7EF and gap at 32-35. I have no issues with those. I use them for a 100-150 shot. Zex honestly isn't the best kit and their HP rating is flywheel not RWHP.
What are you using to pull timing when the nitrous activates? You should prolly be pulling 5-6 degrees for a 100 shot.
What are you using to pull timing when the nitrous activates? You should prolly be pulling 5-6 degrees for a 100 shot.
Thread Starter
Drifting
Joined: Oct 2009
Posts: 1,385
Likes: 85
From: San Diego CA.
You should run NGK BR7EF and gap at 32-35. I have no issues with those. I use them for a 100-150 shot. Zex honestly isn't the best kit and their HP rating is flywheel not RWHP.
What are you using to pull timing when the nitrous activates? You should prolly be pulling 5-6 degrees for a 100 shot.
What are you using to pull timing when the nitrous activates? You should prolly be pulling 5-6 degrees for a 100 shot.
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
You need to only pull timing when the nitrous activates. If you use a predator isn't that timing pulled all the time? Unless you go back in and add timing back?
NGKs are about $2 a piece.
You should probably go to the nitrous section at ls1tech.com . They are very knowledgeable. I don't know what to tell you about the Zex except not many people like them. I didn't know they made plugs. You will need to read the plugs to get the timing and fuel correct. There are a lot of things to consider when tuning for N2O. That why simplicity really isn't a word that goes with N20 except maybe for hooking up so wires and hoses but that is really easy with any kit.
Do you have a window switch, bottle heater, purge kit (may be built into the Zex), WOT switch or TPS switch/controller?
NGKs are about $2 a piece.
You should probably go to the nitrous section at ls1tech.com . They are very knowledgeable. I don't know what to tell you about the Zex except not many people like them. I didn't know they made plugs. You will need to read the plugs to get the timing and fuel correct. There are a lot of things to consider when tuning for N2O. That why simplicity really isn't a word that goes with N20 except maybe for hooking up so wires and hoses but that is really easy with any kit.
Do you have a window switch, bottle heater, purge kit (may be built into the Zex), WOT switch or TPS switch/controller?
Thread Starter
Drifting
Joined: Oct 2009
Posts: 1,385
Likes: 85
From: San Diego CA.
You need to only pull timing when the nitrous activates. If you use a predator isn't that timing pulled all the time? Unless you go back in and add timing back?
NGKs are about $2 a piece.
You should probably go to the nitrous section at ls1tech.com . They are very knowledgeable. I don't know what to tell you about the Zex except not many people like them. I didn't know they made plugs. You will need to read the plugs to get the timing and fuel correct. There are a lot of things to consider when tuning for N2O. That why simplicity really isn't a word that goes with N20 except maybe for hooking up so wires and hoses but that is really easy with any kit.
Do you have a window switch, bottle heater, purge kit (may be built into the Zex), WOT switch or TPS switch/controller?
NGKs are about $2 a piece.
You should probably go to the nitrous section at ls1tech.com . They are very knowledgeable. I don't know what to tell you about the Zex except not many people like them. I didn't know they made plugs. You will need to read the plugs to get the timing and fuel correct. There are a lot of things to consider when tuning for N2O. That why simplicity really isn't a word that goes with N20 except maybe for hooking up so wires and hoses but that is really easy with any kit.
Do you have a window switch, bottle heater, purge kit (may be built into the Zex), WOT switch or TPS switch/controller?
