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Cam timing?

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Gatesys SW20
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2012/11/30 08:54:20 (permalink)
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Cam timing?

Hey guys instead of rebuilding my tip end to accommodate for a set of 264 cams I figured I'd go the cheaper way as I'm on a budget and can't afford 1200$

So in my stock cam how far retarde or advanced should I go I've read on a stock cam don't go beyond 8 degs difference either side of stock
I probably won't need different came gears will I? Or can't the stock ones be adjusted

Also I'm looking for a bit better low end/ mid range
Unless someone can sway me for mid to top end.

How expensive is this aswell? Thought I'd ask here first

Just want to get a nice solid running car. Going on the dyno in a few weeks with an apexi safc if this helps
Does a new fpr and bored rail. And standard bolt ons
Intake exhaust etc
Any help would be great
Thanks :)
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    Gatesys SW20
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    Re:Cam timing? 2012/11/30 08:55:49 (permalink)
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    Does already have a new fpr..."*
    #2
    P E T E
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    Re:Cam timing? 2012/11/30 09:47:21 (permalink)
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    Hey bud,
     
    There;s not alot you can do with the stock cams. What Gen Engine are you running? If its a Gen III, then you can't do squat without aftermarket Cam Wheels. If your running a Gen II then it has 3 adjustments.
     
    See here for more info in regards to mucking about with cam timing on the stock engine: http://mr2oc.com/showthre...6&page=2&pp=20
     
    Essentially, there are gains to be had on a Gen II, but nothing on a Gen III.

    > P E T E <
    #3

    Reddtarga
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    Re:Cam timing? 2012/11/30 10:36:36 (permalink)
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    Probably not worth it.
    Check out:
    http://www.roadandtrack.net.au/index.php/toyota
    'Modifying the 3sge engine'
    "With factory cams, small alterations to only the cam
    (valve) opening points by moving the cam wheel, seems
    to have little nett benefit. Whilst some improvements
    may be made at one point, there is trade off in power
    elsewhere, & quite often, also with emissions. Once the
    cam design is altered however, then the cam timing
    point needs to be optimized. The stock cam gears have
    either 3 or 6 holes to allow this, but it’s a terrible job to
    do this on the car & that’s where the need for a vernier
    gear comes in. Unless you have modified cams, vernier
    gears are mostly a gimmick. If you do buy them, only
    buy ones with hardened gears. Many well known Jap
    brands use unhardened gears and they don't last long."

    1990 ADM NA
     
     
     
     
     
     
    #4
    MRTurbo
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    Re:Cam timing? 2012/11/30 11:13:53 (permalink)
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    so is this turbo or NA??

    1990 SW20 GT 3S-GTE Targa
    2001 Honda CBR600F4i

    #5
    Gatesys SW20
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    Re:Cam timing? 2012/11/30 14:15:01 (permalink)
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    Oh sorry guys
    Gen 2 Na

    Yeah fair enough red targa
    I knew there was a trade off but I was just looking at getting a little better low - mid range or better top end

    Has a pretty decent top end
    So I was leaning more towards a little punchier on the low to mid side
    #6

    MRTurbo
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    Re:Cam timing? 2012/11/30 14:23:35 (permalink)
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    a turbo or V6 might help with that mid range punch ;)
    small NAs are usually only all about top end :P

    1990 SW20 GT 3S-GTE Targa
    2001 Honda CBR600F4i

    #7
    Gatesys SW20
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    Re:Cam timing? 2012/11/30 14:32:20 (permalink)
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    If only I had my blacks :(

    The engine is running great
    But if it ever needed to be replaced which I doubt as I drive it hard but I never hurt the engine.

    If I didn't haver blacks I'd go a red top beams
    If I did
    Either turbo swap with the gearbox and LSD from a rev 5
    Or a 1mzfe supercharged
    #8
    MR2QIK
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    Re:Cam timing? 2012/11/30 15:07:15 (permalink)
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    Really not worth the effort playing with stock cams IMHO. From memory, you can get a small improvement by retarding the exhaust cam a bit, but it's not worth the time/effort.
     
    I know this may sound kinda silly, but if you haven't tried it yet, go fill up on some United 100 RON fuel. The ecu can handle this & there's a noticeable improvement in response. Even worked on my Honduh.

    MR2QIK - "The Little Car That Could"



    320rwkw @ 19psi (pump fuel, no giggle gas)
    11.96 @ 116mph (with 228rwkw)
    #9
    Gatesys SW20
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    Re:Cam timing? 2012/11/30 15:12:26 (permalink)
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    Thanks guys, for your help is it a job to mess around with it?

    Fair enough
    And actually I just put 20$ in only because I was on empty and that was closest ahaha
    I thought it would be crap due to how cheap it is 1.61 is pretty cheap for 100 octane

    Haven't really noticed anything yet maybe a little more responsive but I guess my ecu is still getting use to it as I e run 98 ultimate bp for about 6 months
    #10
    MR2QIK
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    Re:Cam timing? 2012/11/30 15:30:30 (permalink)
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    Yes it's a job. To really do it right & verify the improvement, you need to throw it on the dyno, adjust it 2 degrees at a time (assuming adjustable cam gears) each way until you hit the sweet spot. Not fun adjusting the timing & not cheap spending that much time on the dyno either. I'd be surprised if you found 5rwkw.

    MR2QIK - "The Little Car That Could"



    320rwkw @ 19psi (pump fuel, no giggle gas)
    11.96 @ 116mph (with 228rwkw)
    #11
    Gatesys SW20
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    Re:Cam timing? 2012/11/30 15:58:52 (permalink)
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    Yeah fair enough
    Bummer
    Have to look for power elsewhere :p

    So uniteds 100 Ron is good is it?
    #12
    MR2QIK
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    Re:Cam timing? 2012/11/30 16:39:42 (permalink)
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    Yeah.....I like it. I certainly notice a difference over BP in my car(s). Might not be exactly the same in the case of your car as it's an AUDM ECU setup for inferior Aussie fuel from 20yrs ago.

    MR2QIK - "The Little Car That Could"



    320rwkw @ 19psi (pump fuel, no giggle gas)
    11.96 @ 116mph (with 228rwkw)
    #13
    Gatesys SW20
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    Re:Cam timing? 2012/11/30 18:23:22 (permalink)
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    Ahahah true that ill wait and see when I drive it tomorrow to work.

    But I'm having the afrs tuned so psht
    I'm actually trying to find a blitz ecu the one that you don't have to tune it comes loaded up already.
    #14
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