1JZ-GTE vs 2JZ-GTE JDM Cam Profiles

[wilbo666]

I've taken some measurements off my 1JZ-GTE and 2JZ-GTE JDM cams:

1JZ-GTE Exhaust Cam: Peak ~7.98mm @ ~328Deg
1JZ-GTE Inlet Cam: Peak ~7.72mm @ ~34Deg

2JZ-GTE JDM Exhaust Cam: Peak ~8.67mm @ ~328Deg
2JZ-GTE JDM Inlet Cam: Peak ~8.08mm @ ~41Deg

Base circle ~36mm.

These values seem to differer from the quoted values, so I double checked the max lifts with a micrometer, and got within about 0.03mm from all 4 of my dial gauge recorded readings...

Anyway these are just the values that I recorded... I wouldn't base anything too important off them



I'm happy to email the excel spreadsheet with my measurements to anyone that wants it, just let me know. And if someone wants to host it that is OK by me too.

Cheers
Wilbo

[amichie]

Is that lobe lift or cam follower lift??

[chris davey]

Top work Wilbo. you got my email address don't you?

Now grab that exhaust cam off Pete for the US spec one

[wilbo666]

Is that lobe lift or cam follower lift??

Lobe.

Righto, Chris I'll email it off to ya!

Cheers
Wilbo

[amichie]

Lobe.

Righto, Chris I'll email it off to ya!

Cheers
Wilbo

Hi Wilbo
Can you please send me the excel sheet. I have a program that converts lobe lift to valve lift. All I need is the lobe lift + the base circle diameter which you have already stated above.

Thanks Andrew.

[email protected]

[wilbo666]

I'll email it off

Cheers
Wilbo

[98SZR]

Some very good info there.
+rep

Only question I have is compared to official stats for 2jz, the only thing could be if they are US stats, I'd rather have proven tested info (yours) than some unknown webpage:

Valves: efi/twin cam/24v
Intake valve dia. 33.5 mm
Intake valve lift 7.8 mm
Exhaust valve dia. 29.0 mm
Exhaust valve lift 8.4 mm
Intake opening 3 deg BTDC - 41 deg ABDC
Exhaust opening 52 deg BBDC - 4 deg ATDC

[wilbo666]

Some very good info there.
+rep

Only question I have is compared to official stats for 2jz:

Valves: efi/twin cam/24v
Intake valve dia. 33.5 mm
Intake valve lift 7.8 mm
Exhaust valve dia. 29.0 mm
Exhaust valve lift 8.4 mm
Intake opening 3 deg BTDC - 41 deg ABDC
Exhaust opening 52 deg BBDC - 4 deg ATDC

Glad someone brought that up...

These values seem to differer from the quoted values, so I double checked the max lifts with a micrometer, and got within about 0.03mm from all 4 of my dial gauge recorded readings...

http://mkiv.supras.org.nz/specs.htm says

Inlet Cam Lift: 7.8mm

http://www.turbosupras.com/pages/en/...ZA80/jza80.htm

Intake Camshaft lift: 7.88mm
Exhaust Camshaft lift: 8.4mm

http://www.toymods.net/forums/showthread.php?t=10384 [chris]

Intake lift
1jz: 7.61
2jz: 8.16

Exhaust lift
1jz: 7.6
2jz: 8.66

http://crower.com/cat/import/toyota/...amshafts.shtml

Stock Factory O.E.M. specs (2JZ-GTE) for turbo 248 / 248 200 / 204 .338" inch .346"

Inlet: 8.58mm
Exhaust: 8.79mm

Seems a lot of people list a lot of different values...! The good thing about doing something yourself is that you get to find out for yourself

Cheers
Wilbo

[98SZR]

Also sorry yes did see how you mentioned they differ, just wanted to know why

Found a good sheet with an overview of all 2jzgte engines, good to get all the figures! Link here: http://www.turbosupras.com/pages/en/...ZA80/jza80.htm

[wilbo666]

The figures that others have in my opinion must be wrong...

The EPC lists only 1 exhaust camshaft for the 2jz-gte, and 2 inlet camshafts for the 2jz-gte (one JDM, one USA)...

So I find it a bit disturbing that there are so many 2jz-gte lift values floating around...either my EPC is wrong or some of the measurements floating around are wrong (and hey that might be mine!)...!

...I'd personally take em out to save cluttering the thread, leave a link in you want, but it doesn't really bother me either way

Btw if anyone has a 2jz-ge inlet camshaft I'd be interested in seeing how that stacks up, and if the 2jz-ge inlet cam can fit the 1jz-ge and 2jz-ge heads (the exhaust cam won't fit because of the dizzy drive gear but the inlet might?)...

Cheers
Wilbo

[98SZR]

The figures that others have in my opinion must be wrong...

The EPC lists only 1 exhaust camshaft for the 2jz-gte, and 2 inlet camshafts for the 2jz-gte (one JDM, one USA)...

So I find it a bit disturbing that there are so many 2jz-gte lift values floating around...either my EPC is wrong or some of the measurements floating around are wrong (and hey that might be mine!)...!

...I'd personally take em out to save cluttering the thread, leave a link in you want, but it doesn't really bother me either way

Btw if anyone has a 2jz-ge inlet camshaft I'd be interested in seeing how that stacks up, and if the 2jz-ge inlet cam can fit the 1jz-ge and 2jz-ge heads (the exhaust cam won't fit because of the dizzy drive gear but the inlet might?)...

Cheers
Wilbo

Done mate. Yes there are so many figures out there floating around, but I'd rather measure them myself or get the measurements you have taken then some unconfirmed internet stats. As an example they call my paint code Grayish Green Mica Metallic (6NO) when it's real Toyota colour is Moonstone Pearl (6NO), so you can never be sure info is going to be 100% correct on the intraweb!

Will check my manuals and EPC at home tonight and see what they say.

[Enigma-Penguin]

+rep (if I can, I did it for the another thread before )

The ones I used to ref off were these:

Intake Exhuast
1jz-gte
lift 7.69 7.95
duration (adv) 224 228
duration @ .050" 189.1 194.1
lobe centre

2jz-gte USDM
lift 8.25 8.4
duration (adv) 233 236
duration @ .050" 200 205
lobe centre

2jz-gte JDM
lift 7.8 8.4
duration (adv) 224 236
duration @ .050" 205
lobe centre

2jz-ge
lift 8.3 8.3
duration (adv) 230ish 230ish
duration @ .050"
lobe centre

HKS 256 for 1jz
lift 8.7 8.7
duration (adv) 256 256
duration @ .050" 211.8 210.4
lobe centre 110 115

HKS 264 for 1jz
lift 9 9
duration (adv) 264 264
duration @ .050" 221.2 220
lobe centre 110 115

Crower small core 272 for 1jz
lift 8.7376 8.7376
duration (adv) 272 272
duration @ .050" 218 218
lobe centre

I knew there were plenty of values floating about, but its nice to have some solid figures ( I love how they use "ish" on some figures). I'm tempted to measure my HKS 264 IN/EX ones now. I thinks I need a micrometer

[The Real Roadrunner]

Btw if anyone has a 2jz-ge inlet camshaft I'd be interested in seeing how that stacks up, and if the 2jz-ge inlet cam can fit the 1jz-ge and 2jz-ge heads

Cheers
Wilbo

i is confused,
i have a 2jz-ge here if you want me to check the inlet but if you want to know if it fits the gte heads id guess no as it probly won't have the triggers for the cam pos sensors, i can check on teh weekend if you would like.

cheers
linden

[wilbo666]

i is confused,
i have a 2jz-ge here if you want me to check the inlet but if you want to know if it fits the gte heads id guess no as it probly won't have the triggers for the cam pos sensors, i can check on teh weekend if you would like.

cheers
linden

You are right, that won't work then, I didn't think of that

Scratch that idea

Cheers
Wilbo