Fuel Injector - facts thread
#1
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Fuel Injector - facts thread
Ok.. after having had the pleasure of reading many old threads last night...
It's a given that one must get a recalibrated ECU with larger injectors (especially the 370cc/min 300ZTT ones) or these injectors would "wash out" the combustion chamber when in open loop.
4th Gen injectors are RED in color and flow approximately 240cc/min
4th Gen injectors are side/galley feed variety (vs. 5th Gen top feed)
4th Gen VQ30DE can use injectors from TT 300Z(i.e. 370cc/min) without fitment problems
Can anyone answer (or correct the facts above) the following questions?
What do the COLORS of the top of the injectors represent? (I assume they don't consistantly code for flow capacity)
Would NA Z32 injectors also be a "direct fit" on the 4th Gen? (I believe they are rated at 270cc/min?)
It's a given that one must get a recalibrated ECU with larger injectors (especially the 370cc/min 300ZTT ones) or these injectors would "wash out" the combustion chamber when in open loop.
4th Gen injectors are RED in color and flow approximately 240cc/min
4th Gen injectors are side/galley feed variety (vs. 5th Gen top feed)
4th Gen VQ30DE can use injectors from TT 300Z(i.e. 370cc/min) without fitment problems
Can anyone answer (or correct the facts above) the following questions?
What do the COLORS of the top of the injectors represent? (I assume they don't consistantly code for flow capacity)
Would NA Z32 injectors also be a "direct fit" on the 4th Gen? (I believe they are rated at 270cc/min?)
#2
Re: Fuel Injector - facts thread
Originally posted by Chunger
Ok.. after having had the pleasure of reading many old threads last night...
It's a given that one must get a recalibrated ECU with larger injectors (especially the 370cc/min 300ZTT ones) or these injectors would "wash out" the combustion chamber when in open loop.
Ok.. after having had the pleasure of reading many old threads last night...
It's a given that one must get a recalibrated ECU with larger injectors (especially the 370cc/min 300ZTT ones) or these injectors would "wash out" the combustion chamber when in open loop.
Dixit
#3
Re: Re: Fuel Injector - facts thread
Originally posted by BigDogJonx
This is not true, take MardisGrasMax, he put 370cc injectors in his 4th gen Max and no ECU upgrade. Just recently dynoed it at almost 400whp running 15lbs of s/c boost.
Dixit
This is not true, take MardisGrasMax, he put 370cc injectors in his 4th gen Max and no ECU upgrade. Just recently dynoed it at almost 400whp running 15lbs of s/c boost.
Dixit
I thought he did use an ECU.. I qouted him from his dyno thread
" Using the G force NA ECU to ramp up the timing in the low and mid rpms gained ~15hp/15tq. "
NOT to say it is programmed for bigger injectors, but just trying to help
BTW dixit.. I am SO JEALOUS of your car
#4
Re: Re: Re: Fuel Injector - facts thread
Originally posted by bags533
I thought he did use an ECU.. I qouted him from his dyno thread
" Using the G force NA ECU to ramp up the timing in the low and mid rpms gained ~15hp/15tq. "
NOT to say it is programmed for bigger injectors, but just trying to help
BTW dixit.. I am SO JEALOUS of your car
I thought he did use an ECU.. I qouted him from his dyno thread
" Using the G force NA ECU to ramp up the timing in the low and mid rpms gained ~15hp/15tq. "
NOT to say it is programmed for bigger injectors, but just trying to help
BTW dixit.. I am SO JEALOUS of your car
That is the thread that shows that he installed them without upgrading the ECU. He did the Upgrade later for timing since he is running so much boost and to retard/advance timing for knock/ping control.
Dixit
#5
I think there is also other injectors that are a direct fit for 4th gens, I think they were from a Silvia, but I could wrong, I don't have time to do a search right now, but I also believe they were larger than the 300z injectors......and Mardigras doesn't have any ecu for his injectors, the ecu adjusts to them but you have to lower you base fuel pres. to 20psi, and this would only be good for boosted cars because you need the fmu to get the psi back up because the fuel wont atomiz good at that low of a psi. Also I would say the 300z injectors are the biggest you could get away with the ecu compensating for. Hope I didnt post any wrong info.
#6
Moderator running more PSI than all the boosted Maximas... combined
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Re: Re: Fuel Injector - facts thread
He's using Fields AFC and adjustable FPR to trick the ECU.
Originally posted by BigDogJonx
This is not true, take MardisGrasMax, he put 370cc injectors in his 4th gen Max and no ECU upgrade. Just recently dynoed it at almost 400whp running 15lbs of s/c boost.
Dixit
This is not true, take MardisGrasMax, he put 370cc injectors in his 4th gen Max and no ECU upgrade. Just recently dynoed it at almost 400whp running 15lbs of s/c boost.
Dixit
#7
The G Force ECU is for a normal NA Max with stock injectors.
The Fields dosent effect part throttle driving.
I lowered the base fuel pressure with an adjustable fuel pressure regulator. Their is a few threads about it, search is your friend.
#8
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Hi Matt! I think we can all concur that you are not the "Norm"... I remember your setup...including the tuning with the lower base FP and 3:1 disc...
I'm thinking the SE-R or NA Z32 injectors at 270cc would be more "friendly" a swap than the 370cc TT.
BTW - the question was not of the ECU mod but color code and compatibilitiy with NA Z32 injector...
I'm thinking the SE-R or NA Z32 injectors at 270cc would be more "friendly" a swap than the 370cc TT.
BTW - the question was not of the ECU mod but color code and compatibilitiy with NA Z32 injector...
#9
Re: Re: Re: Re: Fuel Injector - facts thread
Originally posted by BigDogJonx
http://forums.maxima.org/showthread....ight=Injectors
That is the thread that shows that he installed them without upgrading the ECU. He did the Upgrade later for timing since he is running so much boost and to retard/advance timing for knock/ping control.
Dixit
http://forums.maxima.org/showthread....ight=Injectors
That is the thread that shows that he installed them without upgrading the ECU. He did the Upgrade later for timing since he is running so much boost and to retard/advance timing for knock/ping control.
Dixit
Thanks again for correcting me
#10
Re: Fuel Injector - facts thread
I hope you don't mind me asking a related question.
What is the minimum level of boost you can use the 370cc injectors along with the minimum 3:1 calibration disk for the Vortech fmu?
For instance, suppose you are running 9 psi of boost with a 6:1 or 8:1 disk in the fmu and stock injectors. Could you use the 370cc injectors with the 3:1 disk and not be running too rich, or is 9 psi not enough boost for that combination of injectors and fmu disk? Of course, you would have to use an adjustable fpr like Matt does to lower the base fuel pressure so that it won't be too rich at idle, and for fine tuning you would want something like the s-afc. But in general, at 9 psi, would the 370cc injectors along with the 3:1 disk flood the engine or not?
What is the minimum level of boost you can use the 370cc injectors along with the minimum 3:1 calibration disk for the Vortech fmu?
For instance, suppose you are running 9 psi of boost with a 6:1 or 8:1 disk in the fmu and stock injectors. Could you use the 370cc injectors with the 3:1 disk and not be running too rich, or is 9 psi not enough boost for that combination of injectors and fmu disk? Of course, you would have to use an adjustable fpr like Matt does to lower the base fuel pressure so that it won't be too rich at idle, and for fine tuning you would want something like the s-afc. But in general, at 9 psi, would the 370cc injectors along with the 3:1 disk flood the engine or not?
#12
Originally posted by MardiGrasMax
It would be too much.
It would be too much.
Thanks.
#14
My other car is a Hybrid
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Originally posted by Guru
Stock 350Z injectors are 300cc/min. Power Enterprise has 380 and 510 cc injectors available.
Stock 350Z injectors are 300cc/min. Power Enterprise has 380 and 510 cc injectors available.
#15
Originally posted by Stephen Max
Thanks Matt, even though that's not what I wanted to hear. So, to go with the 370cc injectors, I would need to either go to a smaller pulley size to make more boost, thus increasing the fuel requirement, or lean out the AFR with a s-afc? Or both?
Thanks.
Thanks Matt, even though that's not what I wanted to hear. So, to go with the 370cc injectors, I would need to either go to a smaller pulley size to make more boost, thus increasing the fuel requirement, or lean out the AFR with a s-afc? Or both?
Thanks.
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