getting my fuel usage accurate

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
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Mr DOHC
Posts: 95
Joined: Wed May 18, 2016 4:34 pm
cars: VP Maloo

getting my fuel usage accurate

Post by Mr DOHC »

Hi all,

After all the mods i have done, my fuel usage is obviously way out. A full take shows around 800km to empty, but i'm really getting around half that.
What do i change and how can i calculate what to change?

Factory injectors are 205cc, currently using genuine Bosch greens, which are 440cc, so 2.14 times larger. Is it as simple as making a certain value in the ECU 2.14 times smaller or larger to compensate?
yoda69
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Re: getting my fuel usage accurate

Post by yoda69 »

Which ECU and code base are you using?
Mr DOHC
Posts: 95
Joined: Wed May 18, 2016 4:34 pm
cars: VP Maloo

Re: getting my fuel usage accurate

Post by Mr DOHC »

Kalmaker hardware with $12P
barnsie46
Posts: 26
Joined: Tue Apr 21, 2009 2:54 am
cars: vn ss manual 300kw, vq stato 5l
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Re: getting my fuel usage accurate

Post by barnsie46 »

be careful with the bosch green 440cc injectors some are double squirt i ran into this with a set someone had put in a vn v8 and i set the correct value for the injectors but could not work out why it was still over fueling.
barnsie46
Posts: 26
Joined: Tue Apr 21, 2009 2:54 am
cars: vn ss manual 300kw, vq stato 5l
Vs s3 ss manual , vx ss manual and a few more
Location: kadina south australia

Re: getting my fuel usage accurate

Post by barnsie46 »

be careful with the bosch green 440cc injectors some are double squirt i ran into this with a set someone had put in a vn v8 and i set the correct value for the injectors but could not work out why it was still over fueling untill i halved all the values in the ve tables.
Mr DOHC
Posts: 95
Joined: Wed May 18, 2016 4:34 pm
cars: VP Maloo

Re: getting my fuel usage accurate

Post by Mr DOHC »

The injectors have been great. Cars been running for maybe 2000km with them.
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