Cam Specs. 2JZ vs 1JZ

[Silent Knight]

Does someone here have the specs on the stock cams for these two motors?

I need the specs JDM specs for both the 1JZ-GTE and 2JZ-GTE and also the US specs for both of these motors.

Cheers for the help.

[Si]

i have the info somewhere,

if your thinking of 2j cams into 1j i have a strong feeling its not really worth while.

RANDOM GOOGLE INFO

I knwo the the 1JZGE cams are different to the 1JZGTE cams in the front shaft seal size and also the camp angle pickups...
1jz turbo
Intake cam timing (o-c) : 3° BTDC - 41° ABDC
Exhaust cam timing (o-c) : 46° BBDC - 2° ATDC
Camshaft duration : 224 (in) 228 (ex)

http://forums.toymods.org.au/index.php? ... msg_109352

http://www.supraforums.com.au/forum/arc ... php/t-4956

[Silent Knight]

if your thinking of 2j cams into 1j i have a strong feeling its not really worth while.

Mixed opinions...I have heard otherwise.

Someone have all teh full details available somewhere?
Revhead...you should all of the details or don't you guys keep the US specs?

[Si]

i suppose even if the cams didnt fit you could put the whole head on

[Silent Knight]

i suppose even if the cams didnt fit you could put the whole head on

Why would I want to downgrade to a 2J head...?

[Si]

i dont think there are real propper benchmark figures that say a 2j head is any worse than a 1j head

[gmacrae]

i suppose even if the cams didnt fit you could put the whole head on

Why would I want to downgrade to a 2J head...?

Oh christ, here we go. This has been discussed many times in the past overseas, and the final conclusion always drawn is that the flow tests are never conducted accurately enough, usually comparing a tweaked 1j head to a stock 2j head or vice versa. The myth that the 1j outflows the 2j head was started a long time ago by a jealous 1jz owner trying to prove his was actually a better engine than the 2jz he secretly desired - though he'd never admit that to his soarer/mk3 buddies

I mean, lets be serious here. Why would toyota design the head for the smaller, lower hp engine to flow better than the flagship model? To me it makes perfect sense that they flow exactly the same, just because its easier to design and build like this.

1) Dont waste your time replacing your stock cams with more stock cams - you'll never get any decent gains
2) If you're wanting more hp, more parts are made for the 2jz anyway (manifolds, cams etc)

Gene

[Si]

I mean, lets be serious here. Why would toyota design the head for the smaller, lower hp engine to flow better than the flagship model?

yamaha designed the 1j
toyota designed the 2j

[3VLTOY]

Now now boys how bout we all go back to the top of this thread and read the original post?
I'm sure if you look a question was being asked not your own opinions on shit you either do or by the ooks do not understand.

If you know the answer to the above question it is appreciated if not then don't post

[Adamal]

The whole 1J head on a 2J block comes down to cost, if I recall correctly.

A complete 2JZGTE engine costs mega bling, whereas it was cheaper to buy a 2JZGE block, rework the internals and use a 1JZGTE head.

Anyway, as for the cam differences:

I HAVE NO IDEA!!!!!

[Silent Knight]

The myth that the 1j outflows the 2j head was started a long time ago by a jealous 1jz owner trying to prove his was actually a better engine than the 2jz he secretly desired - though he'd never admit that to his soarer/mk3 buddies Laughing

Right well thank you for the nice bed time story and what seems to be a very educated piece of BullShit information...

I did not start this thread to argue with meatsacks over which head is better I am asking for the differences between the cams for the US and JDM spec 1 and 2JZ's.

If you can't contribute then please feel free to piss right off...

[Mr Revhead]

sorry man dont have the info, we got nothing on the JZs here



so im gunna piss off

[vvega]

pissed off like a condom ??

i feel used

v

[Silent Knight]

Right...I've found out the specs on the 2JZ but I still need the 1JZ specs if anyone can help.

2JZ-GTE:
224 degree (JDM) 7.8mm Lift
233 degree (US) 8.25mm Lift

Good site for the specs: http://mkiv.supras.org.nz/specs.htm

[fivebob]

This may, or may not, be of some use to you.
http://my.is/forums/archive/index.php/t-273060.html

[Silent Knight]

Thanks fivebob but the only info they have on cam duration for the 1J on there is for the N/A.

[Si]

are the toyota part numbers different for the jdm and usdm cams?

[Mr Revhead]

exhaust cam is different jdm vs usa.

tell me what the the 1jzgte came in in the states and ill look it up

[Si]

i was under the impression the 1jz didnt come out as USDM untill the vvti ones came about,

did a quick search couldnt find anything

maybe someone else knows

[Silent Knight]

Hrmmm yea I think that might be the case aswell...I've only ever heard of the VVT-i Single Turbo 1J in the states aswell.

Well if that is the case then anyone know the duration for the JDM 1JZ cams?