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    Re: The Mini-Raptor, K-fab Style
    Keeper of the Asylum K-fab's Avatar
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    Quote Originally Posted by bdkw1 View Post
    Needs boost, that will solve all problems right?
    Yes!

    So... been a day. Fixed my old XP900's lower front a-arm (it got dorked this weekend, I have tools, owner and I have agreement)

    The MR is having funky cooling issues. My first time cycling it, it worked. Temp goes up to 200, thermostat (which says 71C - 160F) opens, temp drops, thermostat closes, temps up, blah, blah, blah - does this until it levels out around 200. Good. That's what I wanted.

    Nope, then it does the "I'm hot" and spikes up to 220 then 230. Off with the engine. No steam, no hissing.

    Yesterday I drained, changed thermostat (holy f**k not easy!), filled, burped, started, warmed to fan on.

    Hot water goes into the line that goes to the rad at the back of the tunnel. No hot coming out at other end. Wtf?
    It worked fine the last time.

    Very confused.

    I checked the lines today for obstruction (the little 40 buck video on a flexible stick thing I picked up at Vato Zone is killer). Was able to look into all the lines and there's nothing there that shouldn't be.

    I picked each end up with the engine lift. Burped the bypass that way.

    Gonna look for more air tomorrow after I finish something else.


    Changed direction for a few:


    At full droop the rear wheels toe in. They were just touching the bottom spring perches. Not good.

    So I tried adding just a little toe out- basically enough to stop interference.

    Made rear end squirrelly as shit at ride height.

    Out with more big hunks of round stock and Iím making perches that move the springs up 2.75Ē and clear the tires.


    Got the spring side of each one done, programmed the other side but didnít get a chance to run it. Will finish tomorrow.

    Pix later.
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    Re: The Mini-Raptor, K-fab Style
    Millenium Member plkracer's Avatar
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    Did your impeller come loose? Seen it once or twice.
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    Re: The Mini-Raptor, K-fab Style
    Keeper of the Asylum K-fab's Avatar
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    Quote Originally Posted by plkracer View Post
    Did your impeller come loose? Seen it once or twice.
    Will check.

    Second run showed that a tad bit of toe out makes for a really squirrelly back end.
    Reason I'm having to try to get my toe adjusted is because (like so many aspects of this build) there's a slight clearance issue at full droop.

    The wheels toe in as the suspension droops out and right at the limit, the tire tags the shock spring collar. If I adjust it so that there's clearance (minimal at that), as the MR goes back to ride height the toe in the rear becomes toe out and the back end gets all loose.



    Decided I'd just move the spring perch up so I had clearance and the issue would go away. (hoped at least...)

    Fortunately I have had five large slugs of round stock aluminum in storage for years, left over from a long gone machine shop project and I have a lathe.

    Left to right:
    First two, one with slot, one showing the nicely blended, tapered, lightened inner part that doesn't work. (shit).
    Third one - see the nice flat for the shock to bottom on? Yeah, perfect! Just 2" too high. (shit)
    Far right - see how deeply the cup goes now? Yeah, back to stock spring perch thickness. No travel lost.



    Out came a pair of billet slugs, measurements made, lathe programmed, chips made.



    Two nice new spring perches that have moved the lip 2.8" up are produced. One's still in the lathe, finishing, one's been slotted to fit over the shock shaft so I could install.

    Saw it as soon as I placed the perch on the shock - I'd done a tapered inner section (saving weight). No, that won't work... The shock body has to hit a flat surface when it bottoms. This is tapered just right that the shock body will wedge itself in the cup the first time they meet.

    Shit.

    Okay, it goes to a flat. Easy enough. Quick reprogramming of the lathe and we have a third cup.

    Held it up with pride, admired, patted myself on the back. It looks REALLY NICE.



    Walked over to the Mini-Raptor, held it up against the shock (no slot cut to put on shock yet), admired my nice flat spot for the shock body to bottom on and realized I'd just removed 2" of shock travel with my nice flat piece.

    Shit.

    Round three!

    Deep cup that accommodates the shock body, narrow as possible body to save weight, made it 4.8" in diameter instead of the 5.125" that the Revolution Racing cup was.



    Here's that far right piece, finished along with another friend that gets finished the correct way also.



    New spring perch in place. Pic doesn't quite show the additional clearance I gained. I'm also going to offset the shock spacers .125" - .150" so the shock moves inward and away. Should give me about 1/4" clearance at full droop. Tires will still hit stuff - the sidewalls flex, but it shouldn't be an issue.

    At ride height the clearance is well over a half inch.

    More later, as always.
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