racetronix 42lbs injectors
11-25-2006, 09:32 AM
#1
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racetronix 42lbs injectors Can anyone show me a step by step injector tuning for 42 pounders with HPT?
They flow 48.23 at 58 psi (42 is at 43 psi)
I'm running 30 SVO's
Thanks
Mark
They flow 48.23 at 58 psi (42 is at 43 psi)
I'm running 30 SVO's
Thanks
Mark
Weird to see you in this section. 
11-25-2006, 10:44 AM
#4
you can see what values are in the editor for min pulse width, pulse width adder, default pulse width, etc...it would be a matter of interpreting the data you scan to be able to change those parameters & tables correctly. Im sure you could make up some custom histograms that could help the cause.
11-25-2006, 11:36 AM
#6
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i have practically the same IFR table calculator. email me @ sm1218@aol.com if you want me to send that one along with one i made to ya
i had to change my pulse width and default puls width down by 10% if not even 15%
i had to change my pulse width and default puls width down by 10% if not even 15%
11-25-2006, 11:51 AM
#7
you don't change the pulse width, that's something that gets calculated dynamically. IFR table is just something that's gets plugged as one of the parameters to calculate pulse width.
and for 'step by step' instructions... can you enter 3 numbers, two of them given, and another a standard value? that's all it takes
and for 'step by step' instructions... can you enter 3 numbers, two of them given, and another a standard value? that's all it takes
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11-25-2006, 12:16 PM
#8
Just changing the IFR table didn't work for me, but I'm not sure why. I had to skew the VE table quite a bit to get it to work, but it works fine now. I think it may have to do with the fact that I'm using a IAT/ECT bias of 1.0 instead of the stock settings, which in and of itself changed the VE table (the numbers skewed higher).
11-25-2006, 01:52 PM
#9
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Originally Posted by MeentSS02
Just changing the IFR table didn't work for me, but I'm not sure why. I had to skew the VE table quite a bit to get it to work, but it works fine now. I think it may have to do with the fact that I'm using a IAT/ECT bias of 1.0 instead of the stock settings, which in and of itself changed the VE table (the numbers skewed higher).
I've also noticed strange **** if the incorrect rail pressure is used. I logged my fuel pressure on 4 35 mile trips and averaged the 4 averages for use in RHS spreadsheet. After using this method, my VE table drifting/skewing was next to nothing.
11-25-2006, 05:01 PM
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Basically resetting the IFR and minimum pulsewidth's should get you in the ballpark, but you also need to look at the voltage offset table. If you notice your fuel trims being bad (when they weren't before the injector swap) and you have the IFR set correctly then that table is probably messing with you.
11-25-2006, 05:26 PM
#11
I would love it if you would give us some more insight on the offset table. Lets take a car you have never tuned before. You get the car bone stock and then install H/C and a set of 30lb SVO's. Where do you start to adjust the offset table as you didn't have a baseline realistically. If you were just swaping out injectors I could see this but a lot of the cars some of us do are brought with these mods already in place and no way of looking to see where it was at before.
11-25-2006, 06:32 PM
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Any chance we can get someone to convert this for use with Tunercat's OBDII/Jet tuenr?
I've had this calculator from redhardsupra from his blogspot,but not sure how it applies to our application.
I've had this calculator from redhardsupra from his blogspot,but not sure how it applies to our application.
11-26-2006, 12:39 AM
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Sorry,I was missing something..Common sense.
Don't have alot of experience with Excel,kinda been thrown in,in the last few week's.
Also new to injector tuning,It looked like greek when comparing it..
RedHardSupra,I'd like to thank you for the tremendous help you've given me without even knowing it.Your blogspot is awesome,I don't have HPTuner's but your info is thorough enough it doesn't matter usually.
Any chance you could look at some spreadsheet's some guy's are doing with TC?PM me if you can look at them and I'll send you everything you need.
It's probrably my problem,not understanding spreadsheet's much.
Don't have alot of experience with Excel,kinda been thrown in,in the last few week's.
Also new to injector tuning,It looked like greek when comparing it..
RedHardSupra,I'd like to thank you for the tremendous help you've given me without even knowing it.Your blogspot is awesome,I don't have HPTuner's but your info is thorough enough it doesn't matter usually.
Any chance you could look at some spreadsheet's some guy's are doing with TC?PM me if you can look at them and I'll send you everything you need.
It's probrably my problem,not understanding spreadsheet's much.
11-26-2006, 03:07 PM
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Originally Posted by Black02SS
I would love it if you would give us some more insight on the offset table. Lets take a car you have never tuned before. You get the car bone stock and then install H/C and a set of 30lb SVO's. Where do you start to adjust the offset table as you didn't have a baseline realistically. If you were just swaping out injectors I could see this but a lot of the cars some of us do are brought with these mods already in place and no way of looking to see where it was at before.
That's tough. The best thing is if you already have a developed table. Right now I am working on a new engine for my truck. Before swapping the motor I have already swapped in the 44 lb/hr. injectors I am going to use with the new engine. It definitely takes time but right now my LTFT's are all +/-2%.