Purpose Built 2JZ-GE racing engine

[90lexus]

Originally Posted by pwpanas

Fwiw, I wouldn't let a short-term funds shortage impact your overall design in such a serious way. If you look long & hard you can find a 2JZ-GTE w/turbos from almost any Japanese engine importer (usually from an Aristo). Just mho, fwiw.

Well I appreciate your humble opinion and it is dualy noted for my next project, but I already ordered the GE and its on its way.

Originally Posted by pwpanas

Yep...and it's not just lag you're dealing with - it's the varying rwhp level depending on rpm. The good part about turbos is they can make a lot of power. It feels great when that power keeps ramping up like its never going to stop. The bad side is a roadracer trying to deal with that at-times wildly varying rwhp curve.

Okay, well I really want to make it to that 600 rwhp and if it is as hard as you say to do that with out a turbo ill just have to deal with it.

Originally Posted by pwpanas

I don't understand what you mean.

I was going to replace the heads and pistons, make my own intake, and get a new intake manifold, and from what i understand those are the only things that are different from the 2JZ-GTE and the 2JZ-GE.

Originally Posted by pwpanas

ONLY IN THE 2JZ-GTE!!!

Okay, well would the connecting rods and crank be able to handle the load?

Originally Posted by pwpanas

Depends on what you get, but likely yes regardless.

Originally Posted by pwpanas

Your valvetrain is the primary consideration when raising the redline (not the pistons).

Well either way they are both getting changed.

Originally Posted by pwpanas

Is that post-turbo?

Its my final output, so since I am going turbo yes, thats post turbo.

Originally Posted by pwpanas

There's no such thing. There are only companies that port/polish/valve-seat-cut, etc.

Well I'll just get a 2JZ-GTE head. How much are the gains from a port/polish and all that?

Originally Posted by pwpanas

10:1 is too big to turbo, and 12:1 will require race fuel.

What is the highest comp. ratio i can go with a turbo?

Originally Posted by pwpanas

I can advise you better on cams after you've gone turbo.
...

Originally Posted by pwpanas

Glad you're considering such extensive mods. Again, you've got a cool project going on here - please take lots of photos and post them all!!!

I always document my work and i definately will post all pics.

Originally Posted by pwpanas

Why? Will you be driving it in bone-stock form?

Well I just want to get the project rolling before i get the turbo, so i was thinking of putting the unmoded engine in my rear-wheel-drive-converted car while im saving the money for all of the parts, so i can get one large chunk of the project out of the way and then i'd pull the engine when i got the turbo and everything and put all of the new components into the engine.

Originally Posted by pwpanas

600rwhp from a normally-aspirated 3L on pump gas is asking a LOT. In fact, I'd almost be willing to bet $$$ that it can't be done without nos or a heavy dose of meth w/v.high compression pistons.

Okay, so turbo it is.

Thanks for the help, even though you haven't even touched on specifics your information is extremely helpful for planning out my project.

[pwpanas]

Originally Posted by 90lexus

...I was going to replace the heads and pistons, make my own intake, and get a new intake manifold, and from what i understand those are the only things that are different from the 2JZ-GTE and the 2JZ-GE...

Wrong...very wrong. There are MANY other differences, as detailed in many threads in this and other forums, as well as the original 'yota docs:
http://www.mkiv.com/specifications/ncf/ncf93/

Originally Posted by 90lexus

...Okay, well would the connecting rods and crank be able to handle the load?...

Crank yes (same in 2jz-gte and 2jz-ge). Rods I can't say 100% for sure (since I don't work on very many n/a's), but I'd guess that for only 600rwhp: yep.

Originally Posted by 90lexus

...Well I'll just get a 2JZ-GTE head. How much are the gains from a port/polish and all that?...

Whoa hold on there. You do realize the 2jz-gte head requires a totally different ignition system, and a different exhaust manifold (due to the port spacing), right? I'm pretty sure that the ports for the intake manifold are different as well...

A 2jz-gte head will flow 600rwhp no prob, with no porting & polishing.

Originally Posted by 90lexus

...What is the highest comp. ratio i can go with a turbo?...

With pure methanol you could probably run 11:1 and turbo it too. Pump gas is a totally different story. It all depends how much boost you're going to run. Normally, the way you make 600rwhp with a 2JZ-GTE, you run 8.5:1 pistons, about 25psi of boost, and 100 octane race fuel.

Originally Posted by 90lexus

...Thanks for the help, even though you haven't even touched on specifics your information is extremely helpful for planning out my project.

I'll get into as many specifics as I can...ask away...