Blue flames
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Blue flames
Hey y’all so I got a 2003 Nissan 350z with the tomei catback exhaust. I recently had a shop put on a set of Z1 high flow cats (got them off this forum for cheaper!)and now I can shoot these crisp blue flames which is nice ))I don’t have a tune yet either! the shop I took it too also did check up and saw my that spark plug 6 had bad heat range. I was wondering why my z shoots blue flames instead of yellowish/orange and saw in some of the threads that having bad spark plugs can create this. I’m about to change out my valve covers to new OEM ones and changing my spark plugs to the NGK6As instead of the OEM NGK5As. SO MY QUESTION,, will replacing the spark plugs remove my ability to shoot flames??? Or will my flames turn yellowish/orange instead of blue?? I attached a picture.... I have gotten bigger ones
My Z in MEXICO
My Z in MEXICO
#2
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Yes, maybe it’ll run correctly with good fresh plugs now.
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Seriously?
Unburned fuel exiting from exhaust pipes is never a good thing other than in a race car running massive overlapped cam timing, turbo(s), etc.
Unburned fuel exiting from exhaust pipes is never a good thing other than in a race car running massive overlapped cam timing, turbo(s), etc.
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#5
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To add onto Mic's comments, there should be NO flames from your exhaust- blue, orange or rainbow!! Running rich enough to produce flames means running SO RICH that unburned gasoline is pooling in your exhaust and muffler. This kind of inefficiency doesn't help when racing the 350Z on SCCA race circuits around the country, so please don't delude yourself into thinking you're getting additional performance from the flame drain. The VQ V6 is a precision built engine and running rich means fuel is probably running down cylinder walls (degrading rings) and into the oil (wearing rod and crank bearings) as well. Get it fixed before you damage that beautiful engine!
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Yeah, what they said....no flames, it ruins your exhaust and cats! Doubt you want to buying those regularly. That stuff is for the IG kids that have a different car every year. Fuel should be burnt to make power not impress people on the internet, hell I just bought a set of expensive OKD coils just to make sure I burn my fuel lol.
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To add onto Mic's comments, there should be NO flames from your exhaust- blue, orange or rainbow!! Running rich enough to produce flames means running SO RICH that unburned gasoline is pooling in your exhaust and muffler. This kind of inefficiency doesn't help when racing the 350Z on SCCA race circuits around the country, so please don't delude yourself into thinking you're getting additional performance from the flame drain. The VQ V6 is a precision built engine and running rich means fuel is probably running down cylinder walls (degrading rings) and into the oil (wearing rod and crank bearings) as well. Get it fixed before you damage that beautiful engine!
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Yeah, what they said....no flames, it ruins your exhaust and cats! Doubt you want to buying those regularly. That stuff is for the IG kids that have a different car every year. Fuel should be burnt to make power not impress people on the internet, hell I just bought a set of expensive OKD coils just to make sure I burn my fuel lol.
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yes - anytime you do something to the engine outside of what nissan designed from the factory it's hurting the engine.
With that being said - it's your car, it's your engine, it'll be your fault if you break your engine ... last time I checked, a good running DE engine is around $750 to $1000 for a donor engine and add another $1000 for install.
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Flames out the exhaust is right up there with the "pops n' bangs" crowd so prevalent on social media. Another imitation race car thing. A little natural burbling due to deep downshift and an aftermarket exhaust, fine. Tuning it in, not so much.
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I have the full tomei catback. I did notice that the y-pipe is now all rainbow looking from the outside other than when it came brand new. Could this be from unspent fuel or just the heat?
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it may be wise to learn more about how engines run as a whole. Plenty of information on the internet (whether to trust it, is another thing).
yes - anytime you do something to the engine outside of what nissan designed from the factory it's hurting the engine.
With that being said - it's your car, it's your engine, it'll be your fault if you break your engine ... last time I checked, a good running DE engine is around $750 to $1000 for a donor engine and add another $1000 for install.
yes - anytime you do something to the engine outside of what nissan designed from the factory it's hurting the engine.
With that being said - it's your car, it's your engine, it'll be your fault if you break your engine ... last time I checked, a good running DE engine is around $750 to $1000 for a donor engine and add another $1000 for install.
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Why are you changing from OEM spark plug spec?
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Okay ya I see that point, but they were around the same price so I’d figure why not just got with it.
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If you haven't already purchased your spark plugs, you may want to read this thread. NGK has introduced a new coating for plugs that can be used with the Z:
https://my350z.com/forum/engine-and-...for-the-z.html
The thread lists part numbers and gives a short description on what the new NGKs are like. In short, these plugs will last over 100K and should be installed before you get a tune. One item to check beyond that is the type of fuel injectors being used in your Z. Some people have installed larger injectors with the idea that it'll automatically produce more power. That's not the way it works. Even with the bolt-ons you have, standard OEM fuel injectors are what you should be using.
https://my350z.com/forum/engine-and-...for-the-z.html
The thread lists part numbers and gives a short description on what the new NGKs are like. In short, these plugs will last over 100K and should be installed before you get a tune. One item to check beyond that is the type of fuel injectors being used in your Z. Some people have installed larger injectors with the idea that it'll automatically produce more power. That's not the way it works. Even with the bolt-ons you have, standard OEM fuel injectors are what you should be using.