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Thread: 2jzgte cams in 1jzgte do they fit without mod

  1. #1
    jetpilot Automotive Encyclopaedia 1JZ.747's Avatar
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    Default 2jzgte cams in 1jzgte do they fit without mod

    hi all


    i am looking at cams at present, and are wondering if 2jzgte cams fit the 1jzgte head without modification, i have heard they will but searching the net there appears to be some people saying the area where the came shaft sits in the journal needs to be shaved a few thou to clear properly. any advice would be appreciated.

    shane.

  2. #2
    Forum Member Grease Monkey
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    Places like HKS and Trust list separate 2JZ and 1JZ part numbers, so I'm assuming that they are physically different at least. Unsure as to whether they are interchangeable between the engines without modification, but it's a fair guess that they aren't.

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    regular fella Conversion King chris davey's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    They do not fit. The cams that I am getting from the Crower group buy were made from 2jz cams and modded to fit in a 1j. The inlet one was fine but the exhaust one didn't fit. These are custom cams though. So they are now getting redone to fit 1j on the exhaust.

    A couple of people on SF.com have fitted 2jz cams in a 1jz but there wasn't much difference. I assume you are looking for aftermarket 2jz cams though.

    Here is a before and after with stock 2j cams.

    its something like 0.100" smaller cam seal journal, and the thrust surface of the cam seal journal is like 0.200" smaller. ill have to get the exact measurements from my friend.
    Link: http://www.supraforums.com/forum/sho...light=2jz+cams

    Pic of bits to modify

    The 2 cams on the left are stock 2j the far right cam is a 1j. The cam seal area of both 2j cams need to be machined down to the 1J spec and one of the 2j cams (ex) needs the front journal of the thrust bearing widened to match the 1j as well. The machinest will be able to see exactly what needs to be done when they are both in front of you.
    Its really simply just take the cam seal surface and machine it down to match the 1J cams (aprox .100 thou dont quote me here its been awhile) And the ex cam needs the thrust bearing journal widened about .040 thou (again dont quote me this) Its simple for the machine shop to do the measurements if you have both cams in front of them. In my case it cost me 40-45.00 I cant remember. And the good news is the base circles were exactly the same so there was no valve adjustment needed in my case of course check yours to be sure. They give 1mm more lift and 10-15 degrees more duration. Lift is measured duration is a eye ball guess
    links:
    http://www.supraforums.com/forum/sho...light=2jz+cams
    http://www.supraforums.com/forum/sho...light=2jz+cams
    Hope that helps
    Quote Originally Posted by MR 1JZ View Post
    that interior is so jap...just looking at it makes me want to kill a whale
    QUICKEST 1JZ'S IN OZ

  4. #4
    jetpilot Automotive Encyclopaedia 1JZ.747's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    a set came up cheap, thats why i was looking at it. yea hks big mans cams.

    i read they had to be machined, but if one is to big it will have to be welded and machined, add the cost, its probably cheaper to buy new 1j ones and not have the head ache, which puts me back to where i was before, not wanting to spend that much, oh well.

    just have to buy one of those new 2000 hp jets for my N2O.
    Last edited by 1JZ.747; 10-01-2006 at 10:51 AM.

  5. #5
    regular fella Conversion King chris davey's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    Should have jumped in on the group buy
    Quote Originally Posted by MR 1JZ View Post
    that interior is so jap...just looking at it makes me want to kill a whale
    QUICKEST 1JZ'S IN OZ

  6. #6
    Party Animal Supreme Too Much Toyota MR 1JZ's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    shane...define the big mans cam...

    specs please
    Project Soarer II - Sold
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    regular fella Conversion King chris davey's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    I saw that edit Matt

    FYI I am getting 272/264 intake/exhaust setup. Both with 9.06mm lift. That is advertised duration. Can't remember what the duration at .050" is.

    I went with that combo from recommendations that having 272/272 can have the exhaust valve open too long and because the exhaust back pressure is greater than the intake pressure exhaust gases can be sucked back into the chamber and increase temps as well as dilluting the intake charge. Had some good gains with this 272/264 combo over straight 272's in cars ranging from 400rwhp to 900rwhp.
    Quote Originally Posted by MR 1JZ View Post
    that interior is so jap...just looking at it makes me want to kill a whale
    QUICKEST 1JZ'S IN OZ

  8. #8
    Party Animal Supreme Too Much Toyota MR 1JZ's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    yesI had teh stupid moment...

    304's might be a tad large LOL
    Project Soarer II - Sold
    Evo 5 - The silver fruitbox
    "I'm the man who has the ball. I'm the man who can throw it faster than f**k. So that is why i am better than everyone in the world. Kiss my ass and suck my dick... everyone."

  9. #9
    regular fella Conversion King chris davey's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    Some CRAZY cars in the US are using 280 deg HKS cams now and I have seen in a mag once of 292's being used on a 1j but I think it must have been a typo.
    Quote Originally Posted by MR 1JZ View Post
    that interior is so jap...just looking at it makes me want to kill a whale
    QUICKEST 1JZ'S IN OZ

  10. #10
    jetpilot Automotive Encyclopaedia 1JZ.747's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    originally i was looking at 280 deg custom from hardcore racing. but these are un streetable.

    just now looking at 264 272 combo, though i have read different info to chris, my info is saying run the 264 inlet and 272 outlet.

    but as i say, the well is dry of money, so i will be looking at reducing wieght and going with more gas it think, a $14 jet is a lot cheaper than cams, and about my affordability at present.

    i would love to get my head breathing better, but that money i would spend on cams, i could move up to a 2j, so when i take my skirt of an make up my mind and have the budget for it, i will either go cams, or go 2j

  11. #11
    Party Animal Supreme Too Much Toyota MR 1JZ's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    why not go cams...and a 2J bottom end

    booyah
    Project Soarer II - Sold
    Evo 5 - The silver fruitbox
    "I'm the man who has the ball. I'm the man who can throw it faster than f**k. So that is why i am better than everyone in the world. Kiss my ass and suck my dick... everyone."

  12. #12
    jetpilot Automotive Encyclopaedia 1JZ.747's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    its all about the benjamins homie.

    dont have enough green backs, other wise it would be 2j, over size valves, springs retainers, cams, plenum, throttle body, at least 200hp gas and a T51r or bigger. i would be looking for 150mph trap speed. one day i will get there.

  13. #13
    Party Animal Supreme Too Much Toyota MR 1JZ's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    well thats fair enough dude...I know the "not made of money" feeling too

    race cars cost lots of money but fuck me are they fun...
    Project Soarer II - Sold
    Evo 5 - The silver fruitbox
    "I'm the man who has the ball. I'm the man who can throw it faster than f**k. So that is why i am better than everyone in the world. Kiss my ass and suck my dick... everyone."

  14. #14
    regular fella Conversion King chris davey's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    I was surprised when I read of the reverse staggering 272/264 as I had always heard about the 264/272 combo also but what this fella had to say did sound right in theory so I will see when I get them in. (and get the rest of the shit sorted).

    150mph is crazy! You must love that diff ratio. with the new tyres I am looking at 135mph at 8000rpm max.
    Quote Originally Posted by MR 1JZ View Post
    that interior is so jap...just looking at it makes me want to kill a whale
    QUICKEST 1JZ'S IN OZ

  15. #15
    jetpilot Automotive Encyclopaedia 1JZ.747's Avatar
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    Default Re: 2jzgte cams in 1jzgte do they fit without mod

    if that combo didnt run 150 mph something is majorly wrong.

    it would get walked off the line with 50 of gas then have the second stage 150 hit at 40 foot mark.

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