Gen 3 5.3 TUNING HELP LOOKOVER TUNE SLOW DOWN LOW

[JunkyardDog]

[attach]154043 5.3 standard bore

1. 5.3 standard bore
2. summit level 1 cam 209/217 112
3. 317 heads
4. ls 7 lifters
5. btr pushrods
6. summit pro flat top pistons
7. aus 42pd injectors

[gtstorey]

Need log also.

Did you get full GM data with those injectors?

[abc]

Yep, need the .HPL file of the concern area and more description. Keep in mind, as long as the fueling is close, the ignition timing makes the biggest impact on power production of a finished combo.

[Alvin]

A log would be helpful

[JunkyardDog]

1995 chevy 11-6-24 log file timing -2 degree tune.hpl1995 chevy 10-18-24 current tune timing -2 degree.hpt

[abc]

You need to address your ignition table/tables. 1 degree of advance at 1500 rpm would be my guess at explaining your original concern.

[JunkyardDog]

i have added two to the whole high octane table an low an still feels sluggish

[gtstorey]

How come people never want to answer questions about their injector data?

[JunkyardDog]

yes i got the injector data with the injectors i ordered them from lsx celebration part number 56010-380-8-D

[gtstorey]

Unless you are 100% sure on how you entered the injector data, you should post it here so it can be confirmed. Very few people get it right.

[abc]

i have added two to the whole high octane table an low an still feels sluggish

These guys are gonna need to verify your injector data. I have not studied that part of it very much, I just buy known high quality in that area that is known to come with correct data. Once that is done, learn how to look at your log and cross reference the proper tables, in this exercise, it's the spark tables. If you scroll through your log, you will see when you attempt to accelerate, at 50 percent throttle angle, 90 kpa MAP, and 1500 rpm, the PCM is calling for 1 degree of ignition advance. Adding 2 degrees to that is not gonna be much help. Just a guess but, your gonna need to be somewhere around 15 degrees at that point for some sort of decent power production.

[JunkyardDog]

I can?t find the card that came with them here is what I found on ausinjector website

[blindsquirrel]

I can?t find the card that came with them here is what I found on ausinjector website

I don't see whatever you were trying to post or link to or whatever, but that company sells 'modified' injectors (redrilled), and they do not have any real GM-format data, which is the same as not having any data at all.

[JunkyardDog]

how would i get the gm format data

[blindsquirrel]

You could send them off to somebody who has the lab testing setup, or just buy injectors that come with data meant for use with the GM ECM/PCM. I wouldn't spend money for the characterization service for only one single set of questionably-modified scam injectors.

[blindsquirrel]

https://www.ebay.com/itm/27442490602...n=90000million

(yes, I am quite fed up with ebay's tracking data they add onto all their links, so I made up some of my own)

[SiriusC1024]

You didn't see this from their site? Flow rate is correct for 4bar GM pressure. I checked the math. That implies the data is valid for GM.

[JunkyardDog]

I attached the card earlier today I believe it’s a timing issue

[SiriusC1024]

All I see is a vehicle that hasn't been tuned. What even is the problem statement?

[RDF1]

The IAT Spark was subtracing 7* on that datalog So you had a total of mid teens on timing at WOT.
Plus down low rpm under 2000 it was very low on timing as well.