Moderator: 3ne2nr Mods
nemisis wrote:I changed twice ist set of 3 original and after 4 months I changed 2 to genericTed_v2 wrote:What coilpacks you does use guys?
foreign used?
brand new wingwong from a partsplace?
or genuine from a dealer?
I agree with expected 20% BHP loss from conversion to CNG. But 15% to 20% driveline loss for BHP to WHP is typical for RWD systems. 10% to 15% loss is typical for FWD.agent007 wrote:As this thread got revived, I am observing the type of vehicles that have these conversion kits installed. Today I saw a white Nissan Latio and just for reference those ugly cars come with one engine option only and that is a 1.2 3 cylinder engine producing about 80hp (same as Note).
Using the 20% power loss rule, it means post-install, this Latio would be producing 64hp and this is at the crank. Whp might be 50 if he lucky and the thing is, that car is being used as PH.
All those Nissan QG, HR and MR engines are junk imo and blow coil packs and MAFS often. Nothing like a GA, CA, SR and KA like they use to make. Even the RB proves more reliable than the VQ.
maj. tom wrote:OEM ignition coils are more expensive that i thought.
Even the Aqua (Prius C) has 1 coil OEM for $116USD.
NGK and DENSO also have for the same model but close to that price at $104 USD per coil.
Generic unknown brands come up to average $29USD per coil.
So i guess that says something about the quality of OEM vs. NGK/DENSO vs. very generic.
I wouldn't trust that precision ignition timing to an unknown brand generic resistance circuit.
And consider that they each have an IC controller as well.
nismotrinidappa wrote:Run the premium and enjoy cleaner internal and injectors . When using cng and your injectors just dribbling to maintain idle super IS going to clog it and affect idle issues and performance
racedriverpro wrote:Possibly the leaner burn creating more heat. The engine wasn't designed to be CNG conversion friendly.
The heat of that engine is not higher enough to cause a thermal failure of the coil packs, but in the plugs, is enough to change the electrical parameters the the coil pack circuit would operate with.Ted_v2 wrote:If i thinking what your thinking, you already solved the issue.
swapping coils or mounting it externally with wires to the cyl?
Ted_v2 wrote:If i thinking what your thinking, you already solved the issue.
swapping coils or mounting it externally with wires to the cyl?
Cold Joints and leaking plug wiresracedriverpro wrote:Wouldn't that create additional resistance in reference to ohm's law... weakening the spark delivered to the spark plug?
racedriverpro wrote:Wouldn't that create additional resistance in reference to ohm's law... weakening the spark delivered to the spark plug?
kamakazi wrote:What spark plugs and gaps are people running in their CNG fueled vehicles.
jerry88 wrote:Hey cng users
I just found out by troubleshooting.
I got the best performance from my engine on CNG when i disconnected the solenoid on the butterfly on the intake manifold that is close to the cylinder head. I have 2 cars with cng and did this on both. I now get better acceleration just as if i was running petrol.
The only problem i have to work out now is how to get the check engine light off for that unit.
jerry88 wrote:Hey cng users
I just found out by troubleshooting.
I got the best performance from my engine on CNG when i disconnected the solenoid on the butterfly on the intake manifold that is close to the cylinder head. I have 2 cars with cng and did this on both. I now get better acceleration just as if i was running petrol.
The only problem i have to work out now is how to get the check engine light off for that unit.
jerry88 wrote:Based on what i read about this butterfly , it is mainly for idle speed. I have seen on youtube that they remove these butterfly for better performance and hp.
I realized that that with it unplugged there is no lazy pull off again.
kamakazi wrote:What vehicles are those or specifically what engines are being run on CNG.jerry88 wrote:Hey cng users
I just found out by troubleshooting.
I got the best performance from my engine on CNG when i disconnected the solenoid on the butterfly on the intake manifold that is close to the cylinder head. I have 2 cars with cng and did this on both. I now get better acceleration just as if i was running petrol.
The only problem i have to work out now is how to get the check engine light off for that unit.
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