5.7 tbi - larger cam tune advice needed

[stew86MCSS396]

If you’re using the L03 injectors with stock fuel pressure, you’re probably going lean. Do you know which injectors you’re using and what your fuel pressure is?

[bdads]

stock injector-stock pump- will check pressure later today--- this seems to just happen at wide open throttle-- if I open it up easy part throttle it revs right up to 5000

[NISANDA]

Sound like you are leaning out at top, try and go rich on all the top VE area 20% at a time, if you still lean your maxing out the injector.

[bdads]

thanks for all the help ,,, it does act like that,, lean on top ----
yet the spark concerns me ---
some times it acts like its sparking too advanced,,, sometimes it acts like its wot- popping in the exhaust ????
ive been making too little adjustments-- or too big !!!!--- gotta be a better starting point.... I will try to hook up data logging and see if I can get that working !!!!---

[stew86MCSS396]

Should've mentioned this before you started to mess with your VE...

Your injector size as stated here: http://www.gearhead-efi.com/Fuel-Inj...ident%2A+color

BPW calculated here:http://www.gearhead-efi.com/Fuel-Inj...BPW-Calculator

Set your BPW accordingly in the scalars...however I have a feeling your 305 injectors will not be up to the task.

[bdads]

cool-thanks,,, I'm going to track down some larger injectors--- and start fresh !!!

[bdads]

just got some 5.7 truck injectors--- the 35206 #s 61 pph -- and gave the regulator a few spins tighter--- about half way down on the adjuster --- has anyone seen any other 5.7 bins besides the anlu ?? thanks-- steve

[donf]

stock injector-stock pump- will check pressure later today

My stock pump would only put a few psi more than stock operating pressure when dead headed, so I upgraded to a big block pump. I think the tbi stickies recommend an upgraded pump and fuel pressure gauge to verify, before you even start tuning. Its to keep you from chasing your tail tuning wise.

[bdads]

fuel tables on the anlu bin seemed to be way out of whack--- I smoothed everything,, and leaned out the low rpm ranges---fed it some more around 2500 on up to 5500--- feels good so far,,, now will start trying to log when im at the track--- rock-on !!!