VT V8 injector scaling info
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Re: VT V8 injector scaling info
And RT bins for different variants are easy to do - I tried to go for the latest variant that had a usable XDF.
Re: VT V8 injector scaling info
i checked the vs v6 xdf, it's the same value, and it runs the same injectors as VT V8, so i think it's just the conversion is wrong? i have adjusted it before on a vs v6, i just adjusted it via % difference between the 2 injectors and changed the value and it worked fine. So looking to get the correct value it would be ruffly be X/18.92, i changed that and checked a stock tune then checked my altered tune and all looks right. So
Stock injectors
vt v8 5.0l (incl vt clubsport): 0 280 150 973
20 Lb/hr 208 CC/Min 12 Ohm 3.0bar
208CC/Min = 391.17 msec/gram
Then your injectors
270cc/Min = 301.43 msec/gram
Maybe someone else can confirm the same for other xdf's, does anyone know how we came to the original X / 20.48?
Stock injectors
vt v8 5.0l (incl vt clubsport): 0 280 150 973
20 Lb/hr 208 CC/Min 12 Ohm 3.0bar
208CC/Min = 391.17 msec/gram
Then your injectors
270cc/Min = 301.43 msec/gram
Maybe someone else can confirm the same for other xdf's, does anyone know how we came to the original X / 20.48?
Re: VT V8 injector scaling info
Hi guys,
This may or may not be relevant - I have know idea on how this works with Tuner Pro, i've only ever used Kalmaker for the trusty Delco 808 !
Anyway here is some information - Hope it is of sime use & help !
Injector Rates arent critical. If you compare a V6 calibration with a 5L V8, you will see the factory uses 2 different injector rates for the same injector. I guess thats because 2 different departments do the tuning. I have never bothered with conversion tables from cc per min etc to Injector Rate, mainly because there is no conversion formula. Dynamic rates can only be found from using a Injector Flow Bench
The rule of thumb Injector Rate formula....
LBS/HR DIVIDED BY 2.2 FLOW IN KG/HR
ANSWER X 1000 FLOW IN GRAMS/HR
ANSWER DIVIDED BY 3600 FLOW IN GRAMS/SECOND
1 DIVIDED BY ANSWER X .53 FLOW IN SECONDS/GRAM FOR KALMAKER
.117 IS INJECTOR RATE FOR 36LB/HR INJECTOR
THE .53 AS FAR AS I UNDERSTAND IS INJECTORS RUNNING DOUBLE FIRE 1 PULSE PER REVOLUTION.KALMAKER MUST USE HALF INJECTOR FLOW RATE TO CALCULATE FUEL FOR 1 PULSE PER REVOLUTION.
Cheers,
Kurt
This may or may not be relevant - I have know idea on how this works with Tuner Pro, i've only ever used Kalmaker for the trusty Delco 808 !
Anyway here is some information - Hope it is of sime use & help !
Injector Rates arent critical. If you compare a V6 calibration with a 5L V8, you will see the factory uses 2 different injector rates for the same injector. I guess thats because 2 different departments do the tuning. I have never bothered with conversion tables from cc per min etc to Injector Rate, mainly because there is no conversion formula. Dynamic rates can only be found from using a Injector Flow Bench
The rule of thumb Injector Rate formula....
LBS/HR DIVIDED BY 2.2 FLOW IN KG/HR
ANSWER X 1000 FLOW IN GRAMS/HR
ANSWER DIVIDED BY 3600 FLOW IN GRAMS/SECOND
1 DIVIDED BY ANSWER X .53 FLOW IN SECONDS/GRAM FOR KALMAKER
.117 IS INJECTOR RATE FOR 36LB/HR INJECTOR
THE .53 AS FAR AS I UNDERSTAND IS INJECTORS RUNNING DOUBLE FIRE 1 PULSE PER REVOLUTION.KALMAKER MUST USE HALF INJECTOR FLOW RATE TO CALCULATE FUEL FOR 1 PULSE PER REVOLUTION.
Cheers,
Kurt
Re: VT V8 injector scaling info
Yeh I was in the same boat as above I just adjusted it via % difference between the 2. At the end of the day you do fuel tuning anyway so as long as your blms are still within limits then it's fine