Nissan 370Z Forum - View Single Post - Anyone been thrown a CEL with Berk HFC's?

semtex · 12-22-2009, 04:28 PM

I have the G3 intakes, and I've never had a CEL (I have about 5000 miles on my setup). It seems strange that the stock airboxes would be throwing a code, unless (and this is complete speculation on my part) the better exhaust flow has created an 'imbalance' of some sort. Airflow is a two-part deal, right? Air goes in. Exhaust gases go out. These two need to be balanced, in a manner of speaking. For example, you could have the most freely-flowing air intake in the world. But if your exhaust flow is plugged up, the intake isn't going to help you. When you put your foot down on the accelerator, your car will feel 'corked'. In fact, many years ago on a different car I had to put my stock exhaust back on temporarily, and 'corked' is exactly how it felt, in spite of the fact that I had a nice intake setup on the front end. Now let's reverse things. You have a setup that increases the flow of exhaust gases exiting, but the intake of air on the front end hasn't been increased from stock. So maybe it's imbalanced in that your engine can't get enough air in to keep up with the rate of the exhaust gases exiting. Would that cause a lean condition? Not sure. Slow response? That sounds kinda in the ballpark of what I'm describing, doesn't it? The engine wants more air than it's getting. I don't know, does any of what I'm saying even make sense?

12-22-2009, 04:28 PM	#40 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	I have the G3 intakes, and I've never had a CEL (I have about 5000 miles on my setup). It seems strange that the stock airboxes would be throwing a code, unless (and this is complete speculation on my part) the better exhaust flow has created an 'imbalance' of some sort. Airflow is a two-part deal, right? Air goes in. Exhaust gases go out. These two need to be balanced, in a manner of speaking. For example, you could have the most freely-flowing air intake in the world. But if your exhaust flow is plugged up, the intake isn't going to help you. When you put your foot down on the accelerator, your car will feel 'corked'. In fact, many years ago on a different car I had to put my stock exhaust back on temporarily, and 'corked' is exactly how it felt, in spite of the fact that I had a nice intake setup on the front end. Now let's reverse things. You have a setup that increases the flow of exhaust gases exiting, but the intake of air on the front end hasn't been increased from stock. So maybe it's imbalanced in that your engine can't get enough air in to keep up with the rate of the exhaust gases exiting. Would that cause a lean condition? Not sure. Slow response? That sounds kinda in the ballpark of what I'm describing, doesn't it? The engine wants more air than it's getting. I don't know, does any of what I'm saying even make sense? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.