4jg1t "franken-engine"

[handymanny01]

3.1 block and 2.8 head come together!

[handymanny01]

Port matching head and manifolds ...

[handymanny01]

Direct injection is a go! And the water to air top mount, and VF10 hybrid turbo ..

[isuzurob]

I'm running a custom 12mm pump only the fuel pump body is original and modified 4jh1 injectors, you will need the injectors to match the piston bowl or you will have issues, I'm running a high flowed td04 turbo but it's far to small

[handymanny01]

isuzurob, Sounds like a similar setup to me,,, mine is 12mm pump, Toyota 3.7 direct injection cam plate, and mods to boost compensator , and pretty much everything else that can be tweaked,,, double factory fuelling ,, Turbo is Isuzu 3.1 exhaust housing and turbine, Subaru core, and VF10 comp housing machined to take hilux 3.0 upgrade billet wheel,, 44/58mm ... we are currently working on the best injectors to suit the 4jg1 pistons,, And the best position in relation to the bowl,,, The 4jh1 injectors have worked best 1.0mm closer to bowl than stock,, Am at 100kw and 360NM (at the wheels) so far,,, but def more to come... as these figures were achieved at only 2700 - 2800rpm,,,, falls off after that What mods did you do to your injectors? We plan to try 4jb1 injectors too,, and possibly a 4jb1 standard pump just to see what happens,,,

[isuzurob]

That turbo is way to small for your setup, I'm running modified twin spring injectors so they run single spring and still achieve full flow, I'm running 32psi and exhaust temps are 1200 pre turbo, as I said my turbo is way to little

[geeves]

1200 pre turbo. I hope thats F not C

[handymanny01]

thats what i was thinking Geeves!! hahaha

[handymanny01]

Curious why you think the turbo is too small Rob? (open to all ideas / opinions though) this is the same turbo that was previously on the 4gj2 with the monster injection pump that was making an estimated 130-140 kw at crank..(for 2 weeks then it blew up). so it clearly flows enough air,,, the isuzu exhaust housing is small for sure, but go any bigger and its gonna get laggy,, which is not the desired result.. but like I say,,, very open to ALL ideas!

[isuzurob]

That's degrees c was like that for 2 years of solid abuse and gudgeon pins got punched straight through the pistons 3 weeks ago now running custom forged pistons, I have full 32psi of boost at around 2200rpm and dies at 3,000rpm as exhaust wheel is to small this is why egt are so high also, no power without fuel remember, will rev to around 4200rpm, that's with a high flowed td04 which is far bigger than what you have, so as I said I'm thinking your turbo will be choking your engine setup