Injector valves replacement

[JR7800]

Hi all,

I wonder if someone might be able to help me.

I found some articles on the internet where people say that they changed their injector valves from size 70 to 60 to help with fuel consumption as soon as their 70 valves needed replacement from normal usage(it seems it wears out and becomes bigger than the size 70 and plays havock with the fuel consumption)

I have the 4500 GL and standard exhaust. 2000 model 174 000km. I get between 4.1km/l and my best ever is 4.7km/l this is combined driving on a tank(50%city/50% openroad no 4x4) does this sound about right? Still learning about my patrol...

I am a complete novice whit regard to fuel injection...

Any advice or ideas around the topic...(and ideas to up my km/l)

[Tjaart]

Hello JR

I get up to 6.11km/l with 4500. I've fitted a snorkel, so the engine can get fresh air. I've got branches and a 63mm stainless steel exhaust, so the airflow is much better. That is about it. I've got a unichip, so that might help a tad. But my average consumption is 4.5 to 5km/l off road on road etc.

[Kagiso II]

YES - please reply gents - Oompie also needs to know [Lobo is doing 4 - 5 kpl allipad, and that restricts the reach on available fuel ..]
(Lobo has the 280 ZX fuel injection fitted - with Dictator ecu ... i suppose the same would apply??]

[tour de frans]

Hi,Before you start modyfing your car or any car,check if the vehicle is on spec with performance.A 100kw car must make at least 95kw on a dyno,if not do not modify,look for the problem.I would sugest go to your nearest dyno and do a powerrun to see if the car is on spec.I can tel you now on the 4.5 the book claim 150, i think, kw's,but the 4.5's make 120kw.A strong one make 130kw.If you put your car on a dyno and the result is 110 or so kw's,the ign timeing is to slow,fix it and the car will respond with power and better fuel consumption!
I quote this because 9 out of 10 4.5's had the slow timeing problems,when I tune them on a Dyno.
Take care if the timeing were to slow and got fixed,for the car not to ping.A 4.5 that ping will give the best performance and consumption,but the ping is bad for the car.
Go read the thread under 4.5 pinging.
The kw's I quote,are at the coast,at inland it will be worse.
Rdgs
Frans

[tour de frans]

Excuse me,if you not living at the coast the 4.5 will not be a pinger,with the right timeing,but will ping if you visit the coast.
They have knock sensors,but the ecu can only pull timeing back to a point.
Frans

[Kagiso II]

Huh ?? 100 Kw .. uit LOBO ??? geezzzzzzz, I'll be that lucky ..

no - seriously - the kw quoted by factories as to their vehicles are Kw at the flywheel - and the Dynos we have access to measure output at the drive wheels - en these two - I am sure - will differ much more than 10 kw ???
will one of the informed gents kindly help oompi right here ? ..... that is, if I am wrong ?

Does anybody have the contact details of a supplier [other than a stealer] where I can obtain a fresh set of injectors for the 280 ZX f i system? [or the 2,8 skyline for that matter??]
Thanx
da olde man

[tour de frans]

Hallo oom,Ek het baie lank op n dyno gewerk(een besit),en ja die ouer of eerste dyno's het wiele krag gegee.En oom is reg daar is n groot verskil tussen flywheel en wiele krag +- so 30kw word verloor op die wiele.Dis nou bakkies ens,die karre verloor so 10 tot 15kw.
Die later of nuwe dyno's Claim altwee.Wat lekker is daarvan,nou hoef n ou nie sy enjin uit te haal om op n enjin dyno te sien hoeveel krag jou enjin op die flywheel maak nie.Die dyno werk dit uit.Natuurlik moet elke kar voorgestel word aan die dyno,enjingrote,turbo of nie,voorwiel of agterwiel aangedrewe of al vier,ratverhouding,wielgrote,wieldruk,watter rat die run gedoen word,enjin rpm.(die eienaar se onderbroek kleur )Al daai goed maak die dyno sy somme en se wat jou kar gee op die wielle of flywheel.Om net wiel krag te meet moet die dyno oprateur deur die selfde proses gaan met die voorstel van die kar.
Ek wou dit nie moeilik laat klink nie hoop dit help.

O ja ek het net n 100kw as n voorbeeld gebruik in my vorige post.
Groete
Frans

[Kagiso II]

WWW ..... dassy - NOU is ik ook by - dankie Frans .. en toemaar - ek het jou nie ernstig opgeneem met die 100Kw nie.
lobo is elgeval bestem vir 'n RB25 De OF RB30DE enjin en 5-spoed ratkas.

Kobus (Herrie ^ Safari] - Oompie gaan daai 5-spoed laai wat daar by Stratford le en vollene week as lobo gaan vir sy nuwe koppelaar stel, sommer die 5-spoed maak pas ... daai "High rider" ratkas]

MAAR ek wil nog steeds weet van die injectors vir die 2.8 fuel injection ???

DATSUN bedsjh.jpg (8 KiB) Viewed 2408 times

[tour de frans]

Oom wat is fout met die injectors?

[Kagiso II]

Haijj Frans
Ek weet nie ve3rseker nie - daai goed kom van 'n laat 1980's Nissan af - en Lobo trek nie so gewilig nie en hy is MA swaar op arabian-juice .. so 4 Kml - 5 op sy beste ...
Nou lees ek maar wat seg die manne en lei af dat Lobo se injectors ook al effe "uitgewear" is ??
Het jy ander advies vir oompie??