Nistune a blowthrough setup...need some help!

[meet07]

Ok I just upgraded my turbo, ecu and im having issues with the k constance and the program.

If I adjust the k for idle at like 14.7 then it runs lean around partial throttle. And if I up the k then it runs too rich at idle and decent at partial. Is there something else that im missing b/c im running a blow through maf setup??

And what about cold,warm, after start start up? Is more fuel need here since im running blow through?? I was able to start the car and drive it to the gas station to top her off with 93. I had to go home and get a spare pair of rim/tires b/c my boost controller happened to find its way underneath my front tire. When I got back it didnt want to start. A local shot it with carb cleaner and she fired right up..? Before he did that the plugs looked dry.

Thanks guys.

[Blown240sx]

Ok I just upgraded my turbo, ecu and im having issues with the k constance and the program.

If I adjust the k for idle at like 14.7 then it runs lean around partial throttle. And if I up the k then it runs too rich at idle and decent at partial. Is there something else that im missing b/c im running a blow through maf setup??

And what about cold,warm, after start start up? Is more fuel need here since im running blow through?? I was able to start the car and drive it to the gas station to top her off with 93. I had to go home and get a spare pair of rim/tires b/c my boost controller happened to find its way underneath my front tire. When I got back it didnt want to start. A local shot it with carb cleaner and she fired right up..? Before he did that the plugs looked dry.

Thanks guys.

Id just set the cold and warm idle as close as you can get them to running well then use the actual fuel map to fine tune.
Also the idle enrichment should be set and then adjust your partial throttle with either throttle enrichment tables or the fuel map itself.

[Yellow4g63]

Ok I just upgraded my turbo, ecu and im having issues with the k constance and the program.

If I adjust the k for idle at like 14.7 then it runs lean around partial throttle. And if I up the k then it runs too rich at idle and decent at partial. Is there something else that im missing b/c im running a blow through maf setup??

And what about cold,warm, after start start up? Is more fuel need here since im running blow through?? I was able to start the car and drive it to the gas station to top her off with 93. I had to go home and get a spare pair of rim/tires b/c my boost controller happened to find its way underneath my front tire. When I got back it didnt want to start. A local shot it with carb cleaner and she fired right up..? Before he did that the plugs looked dry.

Thanks guys.

up the K then adjust the latency to get you to 14.7 at idle and see how that works out. My start issues on my car were from the K and latency been way out.

[meet07]

Ok I just upgraded my turbo, ecu and im having issues with the k constance and the program.

If I adjust the k for idle at like 14.7 then it runs lean around partial throttle. And if I up the k then it runs too rich at idle and decent at partial. Is there something else that im missing b/c im running a blow through maf setup??

And what about cold,warm, after start start up? Is more fuel need here since im running blow through?? I was able to start the car and drive it to the gas station to top her off with 93. I had to go home and get a spare pair of rim/tires b/c my boost controller happened to find its way underneath my front tire. When I got back it didnt want to start. A local shot it with carb cleaner and she fired right up..? Before he did that the plugs looked dry.

Thanks guys.

up the K then adjust the latency to get you to 14.7 at idle and see how that works out. My start issues on my car were from the K and latency been way out.

-Do I still need to mess with the latency if Im running the factory 370cc injectors??
-And im suppose to tune partial and wot with the O2 off or just partial throttle and then turbo on the O2 when tuning boost??
-When do you mess with all the diffrent enrichment tables like cold,warm, after start start up??

Im gathering as much info as possible. I wont even be able to messs with the car until the weekend and I have read all the manuals like 5 times. Hands on is always a little diffrent than reading...lol

[Blown240sx]

You shouldnt need to touch latency on factory injectors.
I tune with the O2 always off cause I dont like the ECU changing anything since it uses a narrow band O2. Yea it might help with daily driving Fuel economy but you should be able to tune it to get good gas mileage.

[Darius]

Ditto.

[Yellow4g63]

-Do I still need to mess with the latency if Im running the factory 370cc injectors??
-And im suppose to tune partial and wot with the O2 off or just partial throttle and then turbo on the O2 when tuning boost??
-When do you mess with all the diffrent enrichment tables like cold,warm, after start start up??

Im gathering as much info as possible. I wont even be able to messs with the car until the weekend and I have read all the manuals like 5 times. Hands on is always a little diffrent than reading...lol

I have seen the stock nissan injector latency set between 600us or 700us and even 580us. I thought you had bigger injectors are you sure ur not maxing them out? do a log and check your injector duty cycle. What size is your intercooler pipe?

[Carl H]

i assume you're using a z32 ecu, have you fitted a z32 maf?

[meet07]

Ford lightning maf blow through with a z32 ecu.

[meet07]

-Do I still need to mess with the latency if Im running the factory 370cc injectors??
-And im suppose to tune partial and wot with the O2 off or just partial throttle and then turbo on the O2 when tuning boost??
-When do you mess with all the diffrent enrichment tables like cold,warm, after start start up??

Im gathering as much info as possible. I wont even be able to messs with the car until the weekend and I have read all the manuals like 5 times. Hands on is always a little diffrent than reading...lol

I have seen the stock nissan injector latency set between 600us or 700us and even 580us. I thought you had bigger injectors are you sure ur not maxing them out? do a log and check your injector duty cycle. What size is your intercooler pipe?

I couldnt tell you if I am maxing out the factory injectors b/c I havnt gotten to the point of wot tuning... I set the latency at 600 and the k is set to 160. I drove it from the shop to my house only. Ill have a little more time this saturday to play with it.

[meet07]

UPDATE!! I played with it a little bit today and Ive got it!! To be honest its actually pretty easy after getting to know the program and how the car reacts to changes. Im running 10-12psi right now on this ebay gt35 turbocharger with a .68 turbine housing. Im seeing full boost at like 4-4200 rpms. I havnt yet tweaked my timing but im running like 16 degrees at full boost. Ill post pics and videos soon! Duty cycle is right around 76% so I think I may crank the boost up to 14-15psi soon but not now.

[Yellow4g63]

I would stay were your at until u get bigger injectors.

[meet07]

I would stay were your at until u get bigger injectors.

But I want more!!

[Yellow4g63]

I would stay were your at until u get bigger injectors.

But I want more!!

LoL get the bigger injectors before you burn a hole in the piston.

[Carl H]

is the blowthru maf in a piece of pipe the same ID as the stock lightning maf?

[meet07]

is the blowthru maf in a piece of pipe the same ID as the stock lightning maf?

Its 3 inch. That was the only size the flange came in that I purchased. I still have the platic housing that the maf came in. I purchased it brand new. The fuel tables are way richer than average. Peak rpm and max boost air/fuels are usually 12-11 and mine are up in the 9's

Im running a max of 16 degrees at 10-12 psi. Is that ok or should I bump it up? I remember seeing a thread where the guys running upwards of 19psi was running timing around 16 degrees or so.

Thanks

[Carl H]

you need to get your afrs straight before you start cranking the boost...too rich and you'll bore wash and have spun bearings with a quickness.
what wideband are you running, because on a stock ignition system there is no way you'd be able to ignite 9:1 afrs.
check the diamater of the maf housing (id on it) as i believe it is about 3.25"...altho its been quite some time since i've had my hands on one.

[Blown240sx]

Ive run as much as 25-26 degrees on an RB25 with a 3076 @ 21 psi on 93 octane. Now this is with a + or - of 3 degrees timing since the base timing could be off a bit.

[meet07]

I put the maf into a custom 3 inch pipe that was done locally. I just looked at my bin again and it shows 10.01 I know thats not gonna be right since im not draw through but she is not seeing 10 on the wideband. WOT at like 12psi is showing 12-11 on the LC-1. Im nunning the Innovate with the lc-1, digital read out with the blue screen. It all works well. I still need to install my egt gauge and fuel pressure gauge. but i did a logging run under WOT and it didnt detect any knock.