370cc injectors+Hesitation and intermittent poor throttle response...
09-05-2006, 08:23 AM
#1
370cc injectors+Hesitation and intermittent poor throttle response...
Are these to be expected if I just installed 370cc 300zx injectors and the ECU and MAFS remain stock? Or is this only something which may occur if the injectors are faulty or fouled?
Basically, I just installed them a day or so ago, and I have noted hesitation going from idle to WOT, or from pretty much anywhere between 2k and 4k rpm. Hesitation at the lower part of the band occurs when I am sitting still and revving the engine from idle while the car is in park (I have an auto). I have had slight hesitation issues since when I installed a 2.5" exhaust on my N/A Max; I had chalked these up to a lack of backpressure. Since installing the new injectors the issues seem to have amplified.
Basically, I just installed them a day or so ago, and I have noted hesitation going from idle to WOT, or from pretty much anywhere between 2k and 4k rpm. Hesitation at the lower part of the band occurs when I am sitting still and revving the engine from idle while the car is in park (I have an auto). I have had slight hesitation issues since when I installed a 2.5" exhaust on my N/A Max; I had chalked these up to a lack of backpressure. Since installing the new injectors the issues seem to have amplified.
do you mean safe?
09-05-2006, 09:26 AM
#8
Originally Posted by Flava_24/7
Why are running 370cc on a NA setup?
09-05-2006, 09:31 AM
#9
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Originally Posted by MaximaSE96
well if he had a fuel tuner it would also advance his timing....and 370cc out of a 95-96 300zx are plug and play...which is easier than messing with injector harnesses
-matt
09-05-2006, 09:38 AM
#10
Originally Posted by matty
Yea well it might have been better to wait till you install the blower
Originally Posted by RichMax
and wanted to be sure the car was safe.
09-05-2006, 10:50 AM
#11
Originally Posted by NmexMAX
:, and I still don't get this satement. If you're worried about going lean N/A.. Well, I intended to install the entire supercharger this past weekend... however, putting in the new fuel rail and fuel pump took most of the weekend.
But yes, I am noting signs that the car is running VERY rich. I guess this weekend is do-or-die on the blower install... Going to pick up my piggyback today or tomorrow, I guess...
09-05-2006, 11:14 AM
#12
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Originally Posted by RichMax
But yes, I am noting signs that the car is running VERY rich. I guess this weekend is do-or-die on the blower install... Going to pick up my piggyback today or tomorrow, I guess...
Installing peices of the blower kit is a good idea so you dont do everything all at once, then find problem and have to sort everything out and back-track. However, thats good if your going to get the blower on right away. Like put the injectors in, then start the car. Then start the blower install. .Carefull you dont drive the car too much and wash your rings.
-matt
09-05-2006, 11:20 AM
#13
Originally Posted by MaximaSE96
well if he had a fuel tuner it would also advance his timing....and 370cc out of a 95-96 300zx are plug and play...which is easier than messing with injector harnesses
I understand that the Z32 injectors are plug and play, Im running them but even with the advanced timing there is no real need for the 370cc injectors if hes NA.
09-05-2006, 12:09 PM
#14
I have been debating over going with the SAFC-II or the E-Manage Blue. I know the SAFC-II can't actually control timing advance, but is more prevalent than the E-manage...
Any thoughts?
Any thoughts?
09-05-2006, 01:18 PM
#18
I would need someone able and willing to install and tune the damn thing for less than $500-$1000. You heard correctly, I have gotten these quotes for the EU installed and dyno-tuned on my '99...
09-05-2006, 05:17 PM
#20
Originally Posted by Flava_24/7
I understand that the Z32 injectors are plug and play, Im running them but even with the advanced timing there is no real need for the 370cc injectors if hes NA.
he could also just get it tuned with with SAFC or EU before the blower went in
09-05-2006, 06:41 PM
#21
Originally Posted by MaximaSE96
i agree...i dont want to run them just to advance timing...but i also dont want to push my stock injectors too hard either by bumping up Fuel Pressure unless u can tell me what percent of duty cycle stock injectors run at on stock fuel pressure
he could also just get it tuned with with SAFC or EU before the blower went in
he could also just get it tuned with with SAFC or EU before the blower went in
The 370 cc/min injectors provide 54% more fuel than the stock 240 cc/min injectors
If he plans on running with this setup NA he does need to adjust the FP somehow. Even when boosted he will still need something to tune his FP unless he goes with the JWT SC ecu.
09-05-2006, 07:50 PM
#22
Originally Posted by Flava_24/7
Stock injectors are 240 cc
The 370 cc/min injectors provide 54% more fuel than the stock 240 cc/min injectors
If he plans on running with this setup NA he does need to adjust the FP somehow. Even when boosted he will still need something to tune his FP unless he goes with the JWT SC ecu.
The 370 cc/min injectors provide 54% more fuel than the stock 240 cc/min injectors
If he plans on running with this setup NA he does need to adjust the FP somehow. Even when boosted he will still need something to tune his FP unless he goes with the JWT SC ecu.
I will simply alter my timetable for the s/c install and tune.
09-06-2006, 04:29 AM
#25
Originally Posted by Flava_24/7
Stock injectors are 240 cc
The 370 cc/min injectors provide 54% more fuel than the stock 240 cc/min injectors
If he plans on running with this setup NA he does need to adjust the FP somehow. Even when boosted he will still need something to tune his FP unless he goes with the JWT SC ecu.
The 370 cc/min injectors provide 54% more fuel than the stock 240 cc/min injectors
If he plans on running with this setup NA he does need to adjust the FP somehow. Even when boosted he will still need something to tune his FP unless he goes with the JWT SC ecu.
well if he doesnt have a fuel tuning device he has to adjust pressure...but with a tuning device he can simply take out fuel for now....but i am asking you is the percent of duty cycle stock injectors in the 4th gen run at
09-06-2006, 05:50 AM
#26
Originally Posted by MaximaSE96
....but i am asking you is the percent of duty cycle stock injectors in the 4th gen run at
http://forums.maxima.org/showthread.php?t=202144
09-06-2006, 05:57 AM
#27
Originally Posted by MaximaSE96
well if he doesnt have a fuel tuning device he has to adjust pressure...but with a tuning device he can simply take out fuel for now....but i am asking you is the percent of duty cycle stock injectors in the 4th gen run at
Im not sure what percentage of the duty duty cycle the A32 injectors run at on stock setups, but it appears they max out at around 250-260whp on boosted setups.
The OEM injectors flow rate should be plenty for an NA setup.
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