11psi of boost and hitting fuel cut off.

[IBoughtASupra]

A friend of mine made 15LBS on a stock CT. Yes, that is past the effiency level. He was using an Autometer Boost Gauge as well. At 15LBS, it did not hit fuel cut. He was using an Areomotive Fuel Pressure regulator. You can push those 400cc's a good way but at least a Walbro and Fuel Pressure Regulator are recommended. DriftMotion has the Walbro and Areomotive Fuel Pressure kits. They are good qulaity, as I have purchased both of them.

 

[jamesmwalker79]

ok guys good news after i checked all the hose's for cracks and put them back on and tightend them all back up. i went for a test drive for about 20 miles and wouldn't you know it didn't hit fuel cut off and had no issue's. cars running great now. thanks to every one who had some input for me and helped me out. will be talking to you all again soon and i will be posting some pics once i wash the car. thanks again everyone.

 

[hvyman]

A friend of mine made 15LBS on a stock CT. Yes, that is past the effiency level. He was using an Autometer Boost Gauge as well. At 15LBS, it did not hit fuel cut. He was using an Areomotive Fuel Pressure regulator. You can push those 400cc's a good way but at least a Walbro and Fuel Pressure Regulator are recommended. DriftMotion has the Walbro and Areomotive Fuel Pressure kits. They are good qulaity, as I have purchased both of them.

this is just plain wrong as stock is 440cc injectors. there is a screw in the stock afm that you can adjust to amount of un-metered air coming in for higher boost levels. you will eventually reach its max. after 14psi on a stock ct is a waste and im guessing your fiend was going for im boosting 15psi yo!. stock 440cc injectors should only be pushed to 330hp period. you COULD put them to 400hp but then you are pretty much maxing out 20yr old injectors and about to lose a engine.

if you are going to run the lex afm get some 550cc injectors so you have a 25% fuel and 25% air upgrade and the stock ecu can control it to some degree. if you dont have the injectors get a wide band and afpr and monitor your a/f ratio constantly to make sure your not running lean with just a 25% increase in air.

 

[IBoughtASupra]

Ofcourse, he sold the car. The thing is the guy kept spooling the turbo in every gear. Shifted at 3,500RPM in every gear and I don't know why. His turbo can barely spool now, it only goes to 5LBS. I laughed, I told him not to shift like that.

 

[TurboStreetCar]

i got the arp head bolts in route same with mhg. so i shouldnt blow anything up after those are installed.

:3d_frown: Your just not getting it.

 

[jamesmwalker79]

:3d_frown: Your just not getting it.

ok if im not getting it enlighten me then.

 

[Another MkIII]

ok if im not getting it enlighten me then.

Basically, if you put a Lexus AFM on, you will be getting more air. Ergo, you need more fuel. Otherwise, you go lean, go boom. No amount of ARP head studs and MHGs can change that fact.
-AM3

 

[TurboStreetCar]

ok if im not getting it enlighten me then.

Reread all the posts (Hint #43, 39, 37, 31, ect) made by myself and others on what you should do In there entirety untill you grasp the concept. All the information is already in this thread. How many times do you be to be told?

 

[kamikazemkiii]

+1 well said, hopefully thats comprehendible.

 

[KORYTOYORTA]

Basically what everyone is trying to say is if you get the lexus air flow meter you will need to get 550 injectors, if you get 550 injectors you will need a larger walbaro fuel pump to flow more fuel to the injectors and if you get the pump you will need to buy a fuel pressure regulator to control the pressure of the larger pump. So if you are low on cash you may want to stay stock for now.

And you know it is highly recommended to deck the block and mill the head when you install a mhg if not it will more than likely leak.

Basically you just got the car do the maintence stuff first make sure it runs good and reliable then think about power.

 

[SupraSean]

Basically what everyone is trying to say is if you get the lexus air flow meter you will need to get 550 injectors, if you get 550 injectors you will need a larger walbaro fuel pump to flow more fuel to the injectors and if you get the pump you will need to but a fuel pressure regulator to control the pressure of the larger pump. So if you are low on cash you may want to stay stock for now.

And you know it is highly recommended to deck the block and mill the head when you install a mhg if not it will more than likely leak.

Basically you just got the car do the maintence stuff first make sure it runs good and reliable then think about power.

x2, Reliability then Sustainability then Power,,, Plain and Simple

 

[jamesmwalker79]

Basically what everyone is trying to say is if you get the lexus air flow meter you will need to get 550 injectors, if you get 550 injectors you will need a larger walbaro fuel pump to flow more fuel to the injectors and if you get the pump you will need to buy a fuel pressure regulator to control the pressure of the larger pump. So if you are low on cash you may want to stay stock for now.

And you know it is highly recommended to deck the block and mill the head when you install a mhg if not it will more than likely leak.

Basically you just got the car do the maintence stuff first make sure it runs good and reliable then think about power.

ok i get what your saying i guess i just forgot to mention that i have the waldro fuel pump sitting on my work bench along with 550 inj. just dont have the fuel pressure reg. yet.

 

[TurboStreetCar]

Thats the information you needed to post up. If you have the required fuel system components the AFM will work fine. What is the boost set to now?

 

[jamesmwalker79]

Thats the information you needed to post up. If you have the required fuel system components the AFM will work fine. What is the boost set to now?

11psi

 

[RogueSteel]

Walbro, FPR, 550s, Lexus AFM, Boost and A/F Ratio gauges lol

 

[Nihiliz]

WOW, when my car was stock, i was boosting 15 psi, STOCK EVERYTHING with a lowes made manual boost controller. Hell, the head gasket was stock. i never seen fuel cut at 15 PSI. some kids may not beleive this but slowsc on this forum can vouch hahaha did i mention i had it like this for almost a year aswell.? thats just nuts. hope everything works out for ya bud

 

[TurboStreetCar]

Every car is different or your were under the assumption everything was stock.

Fuel cut is not based on boost pressure, The TCCS only calculates a mass airflow signal from Airspeed vs RPM and displacement. It cuts when mass airflow is above the fuel cut threshold. This is why the threshold of fuel cut varies car to car and climate to climate.

 

[rayall01]

Yes, it's dependent on many factors. In my case, I was running 8 psi with no problems, until I installed a three inch downpipe. Then I started hitting fuel cut.

 

[Nihiliz]

i wasent assuming it was stock. i know its stock. i put the motor in. lol

 

[BKCressida1718]

if i have a bad afm will i still hit fuel cut?