Trooper/Big Horn: 4JG2 engine specs

[garyq]

bore x stroke: 95.4x107
total piston displacement: 3059
compression ratio: 20:1
idling speed: 720 rpm
compression pressure: 30-200 kg/cm2-rpm
* 200 rpm,427 psi. Limit: 313 psi
Firing order: 1-3-4-2
Injection timing: T.D.C
valve clearance: intake: 0.40 (0.016)
exhaust: "same"
Oil capacity: with filter change: 6 liters
without: 5 liters

radiator cap opening pressure: 88.2-117.6 kPa (12.8-17 psi)
Coolant capacity: 8.6 liters
starting syst: output: hitachi 2.8 kW, denso 2.2 kW
clockwise direction (viewed from pinion side)
number of tooth, pinion: 9

Charging syst:
Hitachi: LR150 446, 50A output, rated
LR180-501B, 80 A output, rated

[niwde11]

pre, you got PM.

[niwde11]

gary; at what moment ba gumagana yung turbo ng 4jg2? is it speed or rpm dependent?tnx.

[garyq]

rpm related ang any turbo. Sa atin around 2-2500 rpm nagsisimula ang boost.

[boknoyxtrm2001]

Lord Garyq

Sir with your indulgence....


RPM readings dapat

720 +/- 30 <----- Cold Idle State

800 +/- 20 <----- Normal Idling

800 +/- 50 <------ W A/C on

[nap123]

gary sa manual niyan diba? sa automatic kasi 850 rpm idling speed

[niwde11]

Originally posted by garyq
rpm related ang any turbo. Sa atin around 2-2500 rpm nagsisimula ang boost.

Does that mean na pagkakaandar ng ride ay pwede kagad patayin yung makina(ex; dadaan ako ng malapit banko before going to my destination). Pwedeng di ko na pahinga yung turbo ng around 2 minutes.TIA

[garyq]

Nap: Oo sa manual yan. Looks like the 720 is from cold idle, kaka-start lang. Bok, thanks for the added info.

edwin: May turbo timer ako and a spare key. Pag malayo yung biyahe, cool down ko 2 minutes. Pag withdraw lang sa ATM and I can see the car di ko na pinapatay. I lock it with my spare key

[niwde11]

gary, kung medyo magtatagal sa place(e.g.bank), would you recomend na pahinga pa rin ng 2 mins before patayin engine?

[boknoyxtrm2001]

Nwdie

as long as nagkick in ang turbo mo.. dats the time ipapahinga mo yan pero kung normal driving kanaman wag na..


ang rule
pag gumamit nang turbo ipahinga nang 2 minutes and
pag malapitan wala po..


Pero ang question Lord gary paki sagot po..


ang turbo eh nagaactivate when you reach the desired KPH mo and the RPM

that doesn't mean na pag umabot nang 2K RPM magkikick in ang turbo???

kasi po parang di ganon ang principle ha.. Pero I still might be wrong studying pa ako nang 4Jg2 eh

[garyq]

boknoy: I think one has to see the basics of how a turbo works para maliwanagan dito. The turbine is moved by the exhaust gas coming from the engine. This in return is connected to a compressor wheel (more like a centrifugal pump) that "compresses" the air into the cylinder so that more air means more fuel you can inject producing more power. It takes a certain amount of exhaust gas to turn the turbine (because of inertia) kaya may turbo lag. The turbo syst has to overcome this so that the compressor on the other side of the shaft spins faster and compacts just enough air to the cylinder to give you the additional power. Pansin ko lang sa 4JG2 around 2000 rpm yung start ng noticeable boost and around 3200 rpm yung optimum. This is the reason kaya yun ang nasabi ko. Based lang yun sa rig ko. Hope this helps

[niwde11]

Tnx sa mga input. Buti na lang nandito si master boknoy and gary.

Sir bok, kailan b matatapos Phd mo sa 4jg2. hehehehe.

[boknoyxtrm2001]

Lord Garyq,

I bow down to your humbleness and your wisdom... iba talaga si guru....


Lord Nwdie11

Matatagalan pa.... kasi medyo complicated pa ang 4Jg2 yung sa DMAX nga hilo na ako eh...

[garyq]

boknoy: loko mo ko ha bro sino ba pwede makausap tungkol sa tranny ng ubs69? Yung sa local GM ba yung tranny or Aisin-Warner? Nga pala ano ang konsumo nung local na 4JG2 na matic tranny? May matic ba na lumabas? Thanks!

[kimpOy]

dude may kilala yung friend ko taga angeles city
magaling sa auto tranny ng bighorn.

[garyq]

kimps: saan yung shop niya? sa angeles ba? nga pala Capampangan ka ba?

[kimpOy]

yup sa angeles siya kasi yung kaibigan ko na nag fa-facelift ng bighorn (UBS) to trooper (UBR)
had encountered A/T tranny problems.

nasabi lang niya, nung tine test drive ko ang kanyang (plaisir) model na bighorn.

and yes capampanga ako.

[garyq]

cabalen ka pala. Taga Magalang dad ko. K pag may time ako bisitahin kita para rin for some parts nang rig ko. Salamat uli!

[kimpOy]

sure pre, text ka lang.
try ko rin kunin ang contact number nung tranny expert.