Wideband reads 10.0 at full boost on stock injectors?

[mizak82]

I have a t3/t4 turbonetics turbo on this car with 15lbs of boost.. Its a built engine (rods, pistons, valves).. I only restored the car, I didnt build the motor myself.. how can stock injectors dump that much fuel to keep up with a larger turbo on higher than stock boost.. Sorry for the newb question in advance..

 

[Anubis_4_99]

My stock fuel system in my old talon handled about 20PSI. I was pushing it to the edge though. Most stop at about 15-18PSI and then start upgrading there fuel system to run more boost.

 

[mizak82]

regardless of turbo size?

 

[hubz91talontsi]

Do you have dsmlink? We need more info inorder to help you. Are you sure it has stock injectors?

 

[mizak82]

I do not have dsm link.. I just bought a wideband for it and installed it today.. The car runs great.. I dont have a problem with it.. I just dont understand how those injectors can keep up.. But ya the blue ones 450cc..

 

[WES_393]

But ya the blue ones 450cc..

Are you sure they're 450cc's? Some Denso injectors have blue tops as well and look VERY similar to stock.

10 is a little on the rich side so it wouldn't be too far fetched to say the car has larger injectors and but no tune to compensate so the engine is running rich. Personally, I couldn't get 450's to handle 12 psi on an Evo3 16g so how your at 15psi with zero fuel mods is beyond me. Unless there are unknown fuel mods.

 

[mizak82]

well between 10 and 11.. I will recheck in the morning on the injectors but 99% sure they are stock.. What fuel mods would allow for this, bigger fuel pump? anything else?

 

[brian9397gsx]

I could see this on a 255 walbro and stock regulator, I know I see 60 psi at idle. I had to pull alot of ve out to get decent afrs at idle.

On a friends car with 450cc injectors Wally and link I had to set injector comp at 650 (just for first start up) to get afrs at 14-15.

 

[mizak82]

my AFR at idle is like 14.8.. I believe there is a larger fuel pump believe a 255 or maybe a 190.. i really should know that.. and the FPR is gone..

 

[donniekak]

The stock tune is extremely rich. It targets high 9's low 10's under full boost.

 

[mizak82]

Those numbers are still in a safe range right?

 

[hubz91talontsi]

How big is this "t3/t4" turbo? My guess is a boostleak..