Calling ALL Tuners
Thread Starter
Joined: Nov 2001
Posts: 5,649
Likes: 9
From: Warr Acres, OK
Calling ALL Tuners I'm working on tuning a car (02 Z06 w/7# Procharger) that has been through 2 other tuners before me. My question is: Is there EVER any reason to change the Injector Offset vs Volts vs Kpa table. Someone before me has changed this table on average added + 15% to all the values, but when I set it back to the stock table settings, the car will barely run. But I'm also dealing with unknown for sure injector size and bar rating injectors and +25 LTFTs also. I'm thinking one of the previous tuners crutched this table to make the car driveable with the wrong values in the Flow Rate vs Kpa Table.
TECH Addict
Joined: Jul 2002
Posts: 2,261
Likes: 0
Is there EVER any reason to change the Injector Offset vs Volts vs Kpa table
If you have LS1 Edit or EFILive/Flashscan I can send you a 2000 ASA Bin for these injectors. At least then you could compare the values.
Thread Starter
Joined: Nov 2001
Posts: 5,649
Likes: 9
From: Warr Acres, OK
Originally Posted by Bink
Offset table (and associaoted tables) is specific for each injector type. If the procharger was supplied with the GTP (Bosch-GM) injectors then there is a specific offset table for it. GTPs flow~ 42# at 58 psi. The GTPs are white.
If you have LS1 Edit or EFILive/Flashscan I can send you a 2000 ASA Bin for these injectors. At least then you could compare the values.
If you have LS1 Edit or EFILive/Flashscan I can send you a 2000 ASA Bin for these injectors. At least then you could compare the values.
i would like to know this as well. i have some 38# injectors and want to know about the offset table, but its just something i dont htink i should tinker with without some proper knowledge/info
TECH Addict
Joined: Jul 2002
Posts: 2,261
Likes: 0
Originally Posted by jimmyblue
Does anybody collect "known good" injector offset
values by type?
Has anyone ever seen a manufacturer-sourced
number? Or a bench method for extracting it
experimentally?
values by type?
Has anyone ever seen a manufacturer-sourced
number? Or a bench method for extracting it
experimentally?
(I've confirmed this with wait4me) The correct tables are in the ASA files. These tables/PCMs were also used for the World Challenge Vettes.My understanding is that the Offset tables can only be determined experimentally. And "IF" the injector construction (pintle, coil etc.) is similar to ours then our stock tables are "good enough". At least that's my take on it.
FWIW.
Trending Topics
well i have the racetronix and they are suppose to react faster and i think they are disk style. any ideas on waht to do about that? i am trying to see if i can get taht info from them
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Good topic. I have EFI Live Workshop version and have been glaring at those tables wondering what to do. I also was under the understanding that each injector has its own offset values. Where do you find them?
It would be nice to have a reference chart with some of the more common injector sizes we use that would show these values. Keep this thread going!!
Howard
It would be nice to have a reference chart with some of the more common injector sizes we use that would show these values. Keep this thread going!!
Howard
TECH Addict
Joined: Jul 2002
Posts: 2,261
Likes: 0
Originally Posted by WS6FirebirdTA00
well i have the racetronix and they are suppose to react faster and i think they are disk style. any ideas on waht to do about that? i am trying to see if i can get taht info from them
It says in their ProCal section "If the customer opts for ProCal service, his or her injectors are tested, using RC Engineering's computer-controlled equipment, over a wider range of pulse widths, usually from .5 milliseconds to continuous flow. ProCal tests injectors at pressures up to 125 psi. Additionally, if variable voltages are used, RC will test injectors at any customer- specified voltage between five and 14 volts". If they test at 58 psi you should be able to adjust your offset table with that data.
FWIW.
http://www.rceng.com/procal.htm
Last edited by Bink; Aug 14, 2005 at 08:21 PM.
TECH Addict
Joined: Jul 2002
Posts: 2,261
Likes: 0
Originally Posted by WS6FirebirdTA00
hey thanks man. ill see if they have any info on these if not ill have to find time to take mine off.
I saw a post where RC gave the offset for a set of injectors they sold.
I edited my last post.
TECH Addict
Joined: Jul 2002
Posts: 2,261
Likes: 0
Originally Posted by 9D9LS
Good topic. I have EFI Live Workshop version and have been glaring at those tables wondering what to do. I also was under the understanding that each injector has its own offset values. Where do you find them?
It would be nice to have a reference chart with some of the more common injector sizes we use that would show these values. Keep this thread going!!
Howard
It would be nice to have a reference chart with some of the more common injector sizes we use that would show these values. Keep this thread going!!
Howard
looking at the 2000 to 2001, the offset table varys quite a bit. and that is going fomr the same brand 26.4 to 28.8. no different style 26.4 to 37.8 im sure would screw things up real nicely
well in the past racetronix has told us he would come back with information about the injectors, since he has been claiming we all dont know what we are doing and the ifr is the only change needed when in fact it isnt. while i wait for a response to my post that is a day or so old, that im sure he has read through, i will try to come up with some more information on this stuff and post up anything i can find.
Last edited by WS6FirebirdTA00; Aug 15, 2005 at 11:09 PM.
Let's raise this again. I swapped to 42lb's in June and just adjusted IFR. Car runs fine but technically speaking what are we looking for? Will the injector react quicker? Run better at low speeds? Help with surging? Does anyone have Offset vs Volts vs KPA for Ford SVO 42lb's? Seemed a popular injector so I got them for $200 with 1000 miles on them.
AFAIK, the offset table wont matter much, just tune the ve table and itll cover most of the slack in it. i just used an offset table in mine from a larger injected car, cant remember which, just to get it closer. but i have seen no issues, just makes the ve off slightly i think. it would be nice to have it all set right but i have found nothing. i have 42#ers running in my car now and they are great
I just was reading your thread on hptuners from April on this issue. I'm leaving it alone. However thinking of changing the MAP boundry on the first column to be 57 as my car idles in that range.
Thread Starter
Joined: Nov 2001
Posts: 5,649
Likes: 9
From: Warr Acres, OK
Just to update this thread, Racetronix told me the particular Rochester 50# injectors that were supplied with the SC kit and installed in this particular car are not compatable with the drivers in the LSX PCMs. We ended up changing them out with Motron 60#s and went back to the stock LS6 Offset vs Volts vs KPA table and the car tuned fine.