03 Chevy Silverado 5.3 stage 4 truck cam v2 help

[001tuner]

03 chevrolet silverado 5.3 gen 3 with long tube headers and 4" exhaust.
stage 4 truck cam v2
prc heads

i recently removed the supercharger that was on my truck and the previous owner had a stage 2 comp cam with a magnuson supercharger on it.
i installed a stage 4 truck cam v2 in it and installed a tbss intake with a 92mm ( i believe ) jegs throttle body and 50 lbs injectors at 58 psi.
the previous owner had a handheld and hptuners he tuned the truck with. i have little experience with hptuners but i have used the holley efi and terminator systems before.
the issue i am having is my truck has almost no take out until it hits about 4000 rpm. i have gone through and adjusted everything i can possibly think of to get it to pull. it pulls strong over 4000 rpm but it wont spin tires and it feels super weak getting to the 4k rpm mark. ei know it runs pretty lean at idle but ive heard it doesnt do any harm running lean while cruising or at idle/ low rpm in gears. any help would be appreciated.

dadscurrent3test.hpt25-06-28 20-20-28.hpl

[001tuner]

also i have changed the pe table afr to hit 12.78 instead of the 11.7 that was originally on it. i had no idea it was trying to run that rich in higher rpms. i also havent logged it since.

[gametech]

You really need to do some more reading before you blow this thing up. Your closed loop trims are super lean, and your timing looks to be way too high. The injector data is not correct, and you are logging things you don't need while leaving out important stuff like o2 readings. Trying to lean out your PE is only going to make all of this worse.

[001tuner]

soory about that, i forgot to mention the STFT o2s are both turned off in the tune. i didnt realize until after i logged. ive been trying to do research on the timing but i cant seem to understand the timing tables, hence why i went to the forums for help. also how is the injector data wrong? they are 50 lb injectors? i understand im in the wrong about a few things which is why im looking for help.

[gametech]

Your IFR table is set up for a vac referenced regulator, but your offset vs volts vs vac table is set for a non-referenced system. So even if one of them is correct (doubtful), the other has to be wrong. Do you actually have GM based injector data, or just an advertised flow rate? There are several tables that have to be correct for the computer to properly control fueling.

[001tuner]

I understand, i havent messed with the injector vac reference and such yet. the injectors are gm injectors that came with the tbss intake. it says the injectors are 2010-2013 6.2 flex fuel injectors.it doesnt show anything other than flow rate. how would i go by changing that if you dont mind me asking? also im starting to understand the spark table being awfully high, any pointers on that aswell? thank you. pat number for the injectors are 12613412.

[001tuner]

EDIT- okay so i found this information i can copy and paste with the same injectors. (unsure of how to post a link, but i believe i corrected that.)

[gametech]

https://forum.hptuners.com/showthrea...13412+injector
If anything is unclear on the injectors, that thread has all the info you need.
As for the rest of the tune, you may want to look up a stock file for your vehicle in the tune repository on the HPT customer page. If that truck initially had a canned tune for the blower, it may have all sorts of crap messed with for no good reason. The compare feature in the editor will show the differences.

[001tuner]

https://forum.hptuners.com/showthrea...13412+injector
If anything is unclear on the injectors, that thread has all the info you need.

Gotcha, I do believe I got the injector data fixed after looking at that thank you. If you could, could you help me with the timing table though? I?m a bit lost. If I?m reading correctly I want more timing at less cylinder airmass and then less at wot?

[001tuner]

updated log and tune currently.
25-06-29 15-10-58.hpldadscurrent4test.hpt

[mychevyisntheavy]

u have brake torq turned on in (system options) you need to turn it off. you will not beable to do a burn out. or cause havack.

[RDF1]

Here is the 3412 data that works good.

What size tires do you have?

[001tuner]

u have brake torq turned on in (system options) you need to turn it off. you will not beable to do a burn out. or cause havack.

I never even realized there was an additional table set for torque management. I will try it, thank you. Also sorry the delayed responses.

[001tuner]

295/65/15

[001tuner]

sadly it made no change. here is the current tune and log file.testtune6.hpt25-07-04 14-53-13.hpl

[RDF1]

Does this have the stock 4l80 converter?

Also it has 3.90 gear?


3.90 and 295/65/15, your speed settings are all a good bit off.

[001tuner]

Does this have the stock 4l80 converter?

Also it has 3.90 gear?


3.90 and 295/65/15, your speed settings are all a good bit off.

Yes it has 3.90 gears with a Yukon locker. How so exactly though? I used the hp calculator and it gave a 31.5 diameter and I adjusted with that. Also no, it has a triple disk circle d torque converter with a 3400-3600 stall. 4180e.

[edcmat-l1]

Your cam choice killed the low end torque. Best thing you can do is put the SC back on it.

[RDF1]

Yes it has 3.90 gears with a Yukon locker. How so exactly though? I used the hp calculator and it gave a 31.5 diameter and I adjusted with that. Also no, it has a triple disk circle d torque converter with a 3400-3600 stall. 4180e.

295/65/15 should measure 29.5-30".

ECM 9000 should be 106651.8
ECM 5002 should be 2666.294


Was the converter cut for the super charger or naturally aspirated 5.3?
The datalogs show the converter is pretty tight is why im asking.

Look at where you were brake stalling it. Converter is holding it around 2400-2500 rpms.
And when you let off the brake and it starts moving the truck the rpms are still sitting at 2500rpms. That converter is too tight for your setup. The cam is going to be soggy that low of rpms. Thats why it starts pulling good at 4000 rpms cause thats where it starts making decent power.


This is set for your tire/gear combo.

[001tuner]

I appreciate it. I guess will have to swap cams out then. I had no idea the truck cams were so weak at low rpms which sucks because I have another stage 3 truck cam I?m putting into a 4.8. I?m having an issue now though where occasionally and it?s not consistent but if I hit it wot it shifts perfect and goes to 6k but going from part throttle (60% or so) then hit on it it will hit 6k rpm and wrap out like it hits a limiter. Any ideas on that? I really do appreciate the input. Yall have been a huge help.