JZGE Engine info

[HIZOKU]

how big cams can i go with VVTi before vvti is useless

[3sgte]

this is on takai's 2jz-ge vvti

(snipped image)

Interesting, thanks for the picture. I have never seen those on a Canadian spec Lexus.
(due to emissions I presume)

[ecko]

RB26 ITB i have seen on 400KW+ cars so im sure it will be more then enough for me and can be had cheap found some today for $450 with everything i need

so im sure the ITB will flow enough im more worried about the head not being able to flow

not saying they would be a limitation just that maybe the bmw ones maybe better suited so maybe more power gains/repsonse etc

[gianttomato]

how big cams can i go with VVTi before vvti is useless

With shimless/shim under buckets, 300+ advertised duration, 250 or so at 50 thou lift, IIRC you can run about 14mm lift till the retainer hits the valve stem seal. Of course you need to clearance the pistons, run different valve springs and clearance the lifter bores so the lobes don't smash against them. Big cams like that only come to life at big rpms, so you'd want to make sure the bottom end is set up to withstand that and that the oiling system is up to scratch.

To give you an idea of what's possible read ed's VVTi 1UZ or Glenn's BEAMS 3SGE build threads.

Best bet is to start with non VVTi 2JZGE. I suggest this only because you can buy engine loom and ECU for <$500 if you look around. Get it running in standard guise and add some extractors. This will transform your MX32. Then get ITBs and aftermarket management (make sure there is provision to run VVTi should you choose to go that way in the future). Then add cams. With all of that you should see about 190 rwkW. MY 2JZGE with extractors and ITBs made about 150 rwkW.

If you choose to go VVTi at some later stage, the only thing you'd need to change would be the cams - everything else bolts up.

Be warned that big HP NA builds are exxy.

[3sgte]

Here is some info I posted a couple of years ago (Japanese):
http://www.toymods.org.au/forums/sho...298#post829298

I should probably get around to doing a translation of it.

[HIZOKU]

Well here are some sizes of TB

susuki gsxr1300 is 45mm maybe 46 keep reading diff things x4 avg about $150US


e36 45mm x 6 avg about $500us


rb26 44 x 6 avg about $450au from what i been finding


4age silver top is 42mm and blacktop is 45mm about 400au last time i checked


1uz 50mm ITB kit 900us


and look what i found by accident
http://cgi.ebay.com/ebaymotors/ITB-I...Q5fAccessories

I have found alot of motorbike guys can get theres made out to 49mm so this could be a very cheap option or if you want do it to other ones like rb26 or somthing

[gianttomato]

YSR in Japan do a "kit" using 4AGE ITBs. Maybe see if you can buy the manifold and source the ITBs here. Even for a stocky, you'll want 45mm as a minimum. If you want bigger 4A ITBs, Glenn has copies that he made that run out to 52mm (Kayza throttle bodies).

The M3 stuff can be sourced more cheaply from Europe.

Takai and Gavatron are doing ITB builds on their 2JZGEs (takai's is VVTi) - both are using GTR throttle plates on a chopped lower section manifold.

IIRC, those motorbike ones are small, closer to 39mm. Check of course - been a long time for me.

[HIZOKU]

I was on the YSR site the other day but could not find a link to there ITB for 2jz

and true about the M3 stuff from euro

motorbikes i don't think are 39mm i went and had a look at dads bike zx10r and they where 43mm

at the moment i think i will look at GTR just for fact there easy to get cheap and many people have done the conversion so if i need help i have more luck with it

[Enchanter]

Iam in the process of sourcing for a similar build at the moment. I plan on a 8000 rpm limit to keep the costs lower, but will still be going cams, itbs and tuned extractors. I've chosen non vvti and will be running megasquirt management.
One area I'm stuck on at the moment is the shim under conversion. What to use/where to get ? Any tips ?

[Shakotan_Aaron]

while i know its now common practace to wack a set of throttles and cams into a motor. but really to make more power you need more compression.

while the non vvti 2jz is very common and normally only a few hundred bucks i think the vvti is worth the extra. not sure if it was mentioned but they also have COP like turbo. also when i was looking at 1.5j it seems that the crank and rods of a GE are identical to that of turbo. only difference is no squirters and pistons obviously.

[HIZOKU]

The squirter thing is what made me think about getting a turbo one to start with even if a bare block
with the extra price of a VVti you could put pistons into a non vvti to raise compression how ever

[gianttomato]

You're planning an engine conversion (3K) and working over a naturally aspirated motor (~8K).

Start basic and work up otherwise you'll just end up with an engineless MX32 and a jigsaw puzzle of expensive parts.

Shimless - use 1/2NZFE lifters, they are 31mm diam like 2JZ. Shim under - custom retainers, 2TG shims, 3S lifters.

I suggested a non VVTi motor simply to limit costs. If you chance upon a cheap VVTi 2JZGE complete with ECU, grab it. Pistons are lighter and have shorter skirts, rods are a bit lighter, engine runs 10.4:1 comp. Yep, it has COP but they are double ended and run wasted spark.

Don't worry about squirters - send your oil to important things like mains and big end bearings.

[Shakotan_Aaron]

i always thought the main idea of oil squirters was as a piston cooler (mostly needed for turbo motors) if you have aftermarket pistons they are normally ceramic coated anyway..?

a budget hasn't really been mentioned, and if you are going to some expense i was thinking that it would be better to start from the best base possible.

[rolleraction]

[QUOTE=
Don't worry about squirters - send your oil to important things like mains and big end bearings.[/QUOTE]

+1 on this for NA applications

[uncivilised]

Just a question, is it worth using those ebay style intake manifolds for the 2jzge that locates the throttle body to the same position the gte engines?

like this