Anyone have the injector flow vs map kpa table for 83# injectors.
05-29-2010, 10:24 PM
#1
Anyone have the injector flow vs map kpa table for 83# injectors. Hey Just wondering if some one has this sorted out. I have a good tune in the car now but am going to swap out the 42's for the 83's. I guess i could do the math but if someone has already figured it out that would be great. I think the 83's flow 92#/hr at 58psi.
kpa 0 5 10 15 20 25 3 flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 35 40 45 50 55 60 65
flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 70 75 80
flow 48.43 48.55 48.74
kpa 0 5 10 15 20 25 3 flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 35 40 45 50 55 60 65
flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 70 75 80
flow 48.43 48.55 48.74
05-30-2010, 06:35 AM
#2
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You are going to have to retune it with a wideband! You can't just put a new injector table in and think all is well... Yes, the math will get you a good useable table that is a starting point, but it is by no means plug and play... the fueling tables will need going over.
05-30-2010, 08:07 AM
#3
Thanks for the advice. I do know what you are talking. How do think I tuned it when I put the 42's in. I was just wondering if someone already had some numbers that worked well and got in the ballpark so I don't have to drive around for hrs on open loop logging afr error. I must be a big secret.
05-30-2010, 08:14 AM
#4
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Wasn't trying to be a jerk - just see post after post on here where people think they can just take some table for whatever and plug it into their tune and all will be great...
Whenever I tune for any injector change, I scale the table close to what I would think the injectors would be at the given fuel pressure and then have a wideband on it from the initial start. You know right away how close you were. Work from idle on up - initially scaling the injector table till idle and low throttle is right, then work the other tables to bring all of the fueling in line.
Whenever I tune for any injector change, I scale the table close to what I would think the injectors would be at the given fuel pressure and then have a wideband on it from the initial start. You know right away how close you were. Work from idle on up - initially scaling the injector table till idle and low throttle is right, then work the other tables to bring all of the fueling in line.
05-30-2010, 08:40 AM
#5
If your injector data was correct when you tuned with your 42#ers, and you get all the correct data for your new 83#ers, you should just be able to drop them witout retuning.
You need not only the flow vs kPa, but the battery offsets and the short pulse adders, etc.
The short pulse adder zone is below 4ms. Which is where you are 80% of the time, thats why this table needs to be correct so you can control your idle and cruze.
You need not only the flow vs kPa, but the battery offsets and the short pulse adders, etc.
The short pulse adder zone is below 4ms. Which is where you are 80% of the time, thats why this table needs to be correct so you can control your idle and cruze.
05-30-2010, 11:46 PM
#6
60s worked great. 80s not so great in my car. I have been messing with them for quite awhile now and got lots of help from various people but still have issues. Idle is surging, off idle surging and got a backfire today when stepped on it . Not not sure these are all related to the tune either. Have a few things to check out.
I am thinking hard putting in some 120 low impedence injectors that have and likely sell off these 80s if they don't work exactly how I want them too very soon.
What pisses me off is I just put 115 pound injectors on my old 91 race talon few days ago. I simply entered in something called global.. and then something called deadtime.
that was it car idles like stock. But the talons are low impedence. Also the dsm forums for tuning freely give exact info out and its easy anyway with no short pulse adders or any of the crap the ls1 cars have.
Main reason went to 80 high impedence is bit cleaner. No wiring harness no converter box.
Oh and bought a 300 buck dvd from Greg Banish that was supposed to contain exact numbers for all the various places you need to tweak on the ls1 cars. It worked perfect for 60s although you can hack the 60s and get them to work not bad. But it didn't work worth crap for the 80s. His numbers gave a pig rich idle. And terrible off idle bog.
Waste of money to buy that for 80s.
I am also almost tempted to go to new company that has those injectors for 250 each but that is just so pricey its stupid.
I am thinking hard putting in some 120 low impedence injectors that have and likely sell off these 80s if they don't work exactly how I want them too very soon.
What pisses me off is I just put 115 pound injectors on my old 91 race talon few days ago. I simply entered in something called global.. and then something called deadtime.
that was it car idles like stock. But the talons are low impedence. Also the dsm forums for tuning freely give exact info out and its easy anyway with no short pulse adders or any of the crap the ls1 cars have.
Main reason went to 80 high impedence is bit cleaner. No wiring harness no converter box.
Oh and bought a 300 buck dvd from Greg Banish that was supposed to contain exact numbers for all the various places you need to tweak on the ls1 cars. It worked perfect for 60s although you can hack the 60s and get them to work not bad. But it didn't work worth crap for the 80s. His numbers gave a pig rich idle. And terrible off idle bog.
Waste of money to buy that for 80s.
I am also almost tempted to go to new company that has those injectors for 250 each but that is just so pricey its stupid.
06-01-2010, 07:21 AM
#7
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Hey Just wondering if some one has this sorted out. I have a good tune in the car now but am going to swap out the 42's for the 83's. I guess i could do the math but if someone has already figured it out that would be great. I think the 83's flow 92#/hr at 58psi.
kpa 0 5 10 15 20 25 3 flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 35 40 45 50 55 60 65
flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 70 75 80
flow 48.43 48.55 48.74
kpa 0 5 10 15 20 25 3 flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 35 40 45 50 55 60 65
flow 46.13 46.50 47.00 47.50 48.05 48.18 48.18
kpa 70 75 80
flow 48.43 48.55 48.74
If you dont know/care what your stock numbers were, then what are the current numbers all about? I see you have it tuned for 42's but at what pressure, what injectors are they?
