2jz GTE vs. GE head

[tuning haus]

i posted this question on supraforums too but i wanted to see if anyone on here had any answers as well.

stock for stock can anyone with some credability chime in on which flows better?

2jz- GE head vs. GTE head?

also are the cams and valves/valve springs directly interchangeable? the 98+ GE's had the VVTi set up.. so i'm not sure on that one

also ported? i'm not sure if many have ventured to port a NA head to see what it does or any ideas? i know the GTE head once ported aggressively can flow anywhere up to high 200's low 300's. with 1mm over sized valves etc.

my guess is that the Exhaust side would flow better on the NA head and the INTAKE side would flow better on the Turbo head. ?

[Dramon]

They flow about the same. GE flows more on the exhaust side tho than the GTE.

[gonesingle]

Flow isn't everything.

It's been proven that the 1JZGTE head, 2JZGE head, and 2JZGTE head ALL 3 are capable of producing over 1000hp.

Invest in the fuel and ecu system, because in the end.. that is whats going to determine what kind of power you put down, not what head or displacement you have.

[Bean]

flow IS everything when it comes to power; its how much air your engine can digest at once.

Head flow, flow influenced by cam differences, flow by intake, and flow by exhaust all make an impact; if you increase the flow of all; it makes a huge difference in power.

Its been proven that the 1jz head does not flow the numbers the 2jz heads do... at least the non-vvti. I'd bet money the newer VVTI 1jz head flows pretty nice (as does the 2jz-gte vvti head).

What head you have DOES make an impact and so does the displacement. The displacement is a factor that makes the engine breathe more air; the headflow lets the engine breathe more air too; so does a turbo, so do longer duration and higher lift camshafts, etc, etc, etc

Fuel and ECU are very important, but headflow can and will kill you. KA24DE boys in the 240sx world suffer from horrible head flow and requires extensive porting to flow what the SR20 can stock. The E46 M3 head/engine flows a RIDICULOUS amount of air for the displacement and can max out the flow of a 66mm turbo on pump gas (remember boost is a byproduct of engine not being able to digest all of the air being shoved into it). Its what allows the RB26 to make so much power for its size.

You can port a 1jz head and make substantial amounts of power with it, yes. But stock for stock? Its not in the same league. GE head from the numbers I've seen flows a substantial amount more on exhaust and only slightly more/less on intake. And judging by sizing of stock ports on each head; it makes a lot of sense.

[hottscennessey]

http://supraforums.com/forum/showthread.php?t=437328

[gonesingle]

Those are made up numbers for the 1000th time. Jesus people. How long have we been on the internet for?

[hottscennessey]

good call, no flow sheets FTL.