soulfreak Posted September 3, 2014 Share Posted September 3, 2014 Hi guys! Unfortunately I got my 2JZ-GE bottom end dead - oil and coolant emulsion did their job. Only spare engine what I could get was from GS300 2JZ-GE VVT-i. My plan is to leave everything from VVT-i bottom end (block, pistons, conrods) and put on non-VVT-i cylinder head with oem GTE head gasket. But I mentioned that VVT-i pistons are with different relief - smaller grooves for valves. non-VVT-i VVT-i Also I have questions about injectors and fuel pump!? Is it possible to leave oem J-spec NA fuel pump and injectors if I plan to raise the power till ~400hp? Thanks! Quote Link to comment Share on other sites More sharing options...
Style Posted September 3, 2014 Share Posted September 3, 2014 OEM injectors are 330cc IIRC so you'll need to uprate them. for the 400 mark you could use some MKIII 440cc injectors. Usually sell relatively cheap and are plug and play. You will need resistors though to make them high impedance. Fuel pump should just about be okay for 400. Anything above that will definitely need an uprated one. Good luck with the build Quote Link to comment Share on other sites More sharing options...
mikefinan Posted September 3, 2014 Share Posted September 3, 2014 high compression, 6psi with oem stock should see you reach 400....... Quote Link to comment Share on other sites More sharing options...
soulfreak Posted September 3, 2014 Author Share Posted September 3, 2014 I got 550cc injectors from 300zx low impedance. Do they fit to fuel rail? And how much hp can hold oem jspec injectors? Quote Link to comment Share on other sites More sharing options...
soulfreak Posted September 12, 2014 Author Share Posted September 12, 2014 Little update: Engine is collected together with VVT-i NA bottom + oem GTE head gasket + nonVVT-i NA head. Engine looks to be OK. Next week my LHD conversion will be finished and engine will finaly start. Quote Link to comment Share on other sites More sharing options...
Style Posted September 12, 2014 Share Posted September 12, 2014 I got 550cc injectors from 300zx low impedance. Do they fit to fuel rail? And how much hp can hold oem jspec injectors? I've never heard 300zx injectors to fit the 2jz dude. Low impedance as well so would need resistors if they did fit to make them high impedance. There are 550cc injectors from an RX7 that would fit but I honestly don't know exactly what ones they are. Info is on here somewhere though. Like I said before, 440cc MKIII injectors are probably what you want for 400hp. OEM 330cc ones won't get you far past 365hp I'd imagine, and that would be really pushing them so they wouldn't last long. Since you've dropped a GTE headgasket in as well you've dropped the compression ratio so the engine won't be as responsive. Best to keep a GE headgasket in there if you haven't fitted it already Quote Link to comment Share on other sites More sharing options...
David P Posted September 12, 2014 Share Posted September 12, 2014 Little update: Engine is collected together with VVT-i NA bottom + oem GTE head gasket + nonVVT-i NA head. Engine looks to be OK. Next week my LHD conversion will be finished and engine will finaly start. I believe that the VVTI N/A conrods are weaker than non VVTI conrods and will be the weakest component of the build, but I don't know their limit? Quote Link to comment Share on other sites More sharing options...
soulfreak Posted September 12, 2014 Author Share Posted September 12, 2014 Somewhere I red that VVT-i conrods can hold up to 550-600hp. So then it's not a problem for my build, I will stop at ~400hp... I hope Quote Link to comment Share on other sites More sharing options...
Noz Posted September 15, 2014 Share Posted September 15, 2014 I might have some non-vvti rods for cheap if you do decide to change. I was always sure the vvti was weaker as well. I'd definitely confirm this mate. I want that vvti head lol dizzy sucks, coils for the win! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 15, 2014 Share Posted September 15, 2014 Supra 2JZ-GTE and GE up to 1998 year including TT VVTi engines all use the same rods, part number 13201-46040 However, the Aristo 2JZ-GE with VVTi shows rods as part number 13201-46060 so they are different. Just *HOW* they differ I do not know. The interesting thing is the big ened shell part number is different for the Aristo N/A VVTi engine, as well as the rods. Crank and crank main bearings are the same. Did Toyota reduce bearing width in the Aristo / GS300 VVTi N/A to reduce friction? In a performance engine build i would fit Supra rods. I just happen to have a set that have been fully checked for ovality and straightness, big end bore size, and little end size. They are balanced and fitted with brand new ARP rod bolts.... E-mail if interested. Quote Link to comment Share on other sites More sharing options...
David P Posted September 15, 2014 Share Posted September 15, 2014 I think it was Kirk who popped up with the VVTI conrods specs the last time this question came around, but can't find the thread. Quote Link to comment Share on other sites More sharing options...
soulfreak Posted September 15, 2014 Author Share Posted September 15, 2014 No problems guys, I know that VVTi conrods are weaker. The question was about the pistons, see first post. And as the engine is already bolted together and hope tomorrow it will start. Quote Link to comment Share on other sites More sharing options...
David P Posted September 15, 2014 Share Posted September 15, 2014 I think the VVTI N/A pistons are 11 to 1 compression? Quote Link to comment Share on other sites More sharing options...
soulfreak Posted September 28, 2014 Author Share Posted September 28, 2014 Nope, NA VVTi engines CR is 10.5:1. Quote Link to comment Share on other sites More sharing options...
David P Posted September 28, 2014 Share Posted September 28, 2014 (edited) That being the case, sums say that with a T.T. head gasket you'd end up with a compression ratio of 9.7:1. This combo should be good for max of 1 - 1.1 bar of boost and with a turbo no larger than needed would be as lagless a setup as you could build. http://www.mkivsupra.net/vbb/showthread.php?307633-Benefits-of-TT-pistons-NA-T&highlight=compression+ratio Edited September 28, 2014 by David P (see edit history) Quote Link to comment Share on other sites More sharing options...
garethr Posted October 7, 2014 Share Posted October 7, 2014 Image (from Club Lexus) on Supraforums -- 2JZ-GE VVTi conrod vs the rod from all the other 2JZs http://www.supraforums.com/forum/showthread.php?636149-Help-jdm-2jzgte-or-2jzgte-vvti&p=8965432&viewfull=1#post8965432 Quote Link to comment Share on other sites More sharing options...
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