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Thread: 3TC TRD valve spring specs needed

  1. #1
    Junior Member Backyard Mechanic
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    Default 3TC TRD valve spring specs needed

    Hi all. I purchased a Crower cam for my 3T/2T engine. In Crower catalogue they say to use TRD valve spring kit, but I have contacted TRD Japan and asked for kit or specs of inner spring since outer is standard 3TC item and been informed they don't have kit and no access to specs anymore. I have contacted Crower and informed them TRD parts not available and asked another option or specs required with no help. Anybody have specs of springs TRD part no. 90502-TE751. I know installed height of outer spring is 1.446 to 1.5 inches. I don't know installed pressure or height of inner spring.
    Thanks early for any info.

  2. #2
    Forum Member Grease Monkey
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    Default Re: 3TC TRD valve spring specs needed

    What are the specs of your Crower cam?

    I reckon you will have to ask a local cam place to recommend the valve springs to suit your cam. Crow cams can help out. There's also Euroexport, BRDracing, and Paradise racing that have 3TC springs.

    http://www.euroexportinc.com/3tc/valve-train-components

    http://www.brdracing.com/3tc_valvetrain.htm

    https://paradiseracing.com/shop/engi...oyota-2tc-3tc/

    I have a Wade cam 1147BS for my 3TC: 224 duration @ 0.05, 0.449" lift. My cylinder head machinist got me a set of harder springs from crow cams. I think they cross reference with Holden 202 valve springs.

  3. #3
    Junior Member Backyard Mechanic
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    Default Re: 3TC TRD valve spring specs needed

    Quote Originally Posted by brucey View Post
    What are the specs of your Crower cam?

    I reckon you will have to ask a local cam place to recommend the valve springs to suit your cam. Crow cams can help out. There's also Euroexport, BRDracing, and Paradise racing that have 3TC springs.

    http://www.euroexportinc.com/3tc/valve-train-components

    http://www.brdracing.com/3tc_valvetrain.htm

    https://paradiseracing.com/shop/engi...oyota-2tc-3tc/

    I have a Wade cam 1147BS for my 3TC: 224 duration @ 0.05, 0.449" lift. My cylinder head machinist got me a set of harder springs from crow cams. I think they cross reference with Holden 202 valve springs.
    I have bought a set of standard height double springs from euroexport. I have no idea,without having springs tested, of installed pressure. My main concern is too much pressure which can chew a cam apart in no time and not covered by Crower warranty.
    A mate who builds race engines has testing gear, when I find specs I will post at later date.
    The Crower cam is grind no. 61852. Duration Advertised 274 In- 280 Ex @0.050 218 In- 228 Ex, Lift 0.353 In- 0.372 Ex. I was after cam with good midrange torque and slight increase in top end, which was recommended by Crower for my use and gearing I'm using.

  4. #4
    Forum Member Grease Monkey
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    Default Re: 3TC TRD valve spring specs needed

    I've got single crow cams valve springs in my 3TC. Taken it to 6500rpm easily. Haven't taken it further since I'm rebuilding the bottom end and putting on twin carbs.

    The 0.353" lift and mild cam you have probably doesn't need need really high seat pressure.
    If you email euroexport they could give you the specs of their springs.

    Did you get your stock cam reground, or its a new Crower cam?

  5. #5
    Junior Member Backyard Mechanic
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    Default Re: 3TC TRD valve spring specs needed

    Quote Originally Posted by brucey View Post
    I've got single crow cams valve springs in my 3TC. Taken it to 6500rpm easily. Haven't taken it further since I'm rebuilding the bottom end and putting on twin carbs.

    The 0.353" lift and mild cam you have probably doesn't need need really high seat pressure.
    If you email euroexport they could give you the specs of their springs.

    Did you get your stock cam reground, or its a new Crower cam?
    Thanks for info.
    Crower cams had a special on some cams a couple of months ago and cost me post above what a reground cam was here, it is a new billet cam.
    My concern was too much seat pressure, just trying to find a replacement for TRD springs. The reason I went for mild grind was after mid range torque because main use is daily driver with weekend khanacross or autocross events. I'm using 4.3 diff gears with a TRD gearbox kit I bought from NZ a number of years ago, which gives 2.63 first gear.

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