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JehTehsus
JehTehsus
Member
Last Activity: Today, 06:21 PM
Joined: 12-11-2019
Location: Victoria, BC, Canada
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Sounds great guys, thanks for the input. I am going to get that on order with a few other bits here, things are starting to come together and it feels good.

    Had some 'fun' messing around...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    I need to make up my mind on whether to go with 0.7/0.625 F/R masters or 0.625 for both, with the stock brakes. I am leaning to 0.625 for both and making a significant adjustment with balance bar. This...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    MC piston size will definitely affect bias. Even if you kept a 50/50 setting on the balance bar, at 100lbf on the pedal and say a 6x ratio you would have 300lb on each master. Different sizes will then...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Finally got around to taking a stab at degreeing my cam.

    Was having some issues getting the dial micrometer properly lined up, anyone have any recommendations where I should rest the pointer?...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Thanks for pointing me in this direction.

    Looking through a number of posts, I think we can safely say peak brake pressures are under 2000PSI. In fact, looking at pressure traces under track...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Most diagrams I have seen show springs between the two pistons internally. Which to my mind makes sense, if you did have a slow leak in one circuit having a spring may mean the difference between getting...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Ok, I have tried actually putting together a calculator for comparison purposes.

    Running the numbers like this it does seem obvious there is an issue... in fact, I am kinda hoping I am buggering...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    So taking those numbers I am getting ~1000psi pressure from the stock E30 master cylinder @70lb human effort. Which is what I thought originally (used 400lbs for the booster in my estimates when selecting...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Do you have any idea what sort of assist the E30 brake booster provides? It would be great if I had something more definite for comparisons, random googling yields boosters providing anywhere from 400-1000+...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    I don't expect to have any issues, but doing a fairly quick and rough cam profile isn't too much work so I figure I may as well check....
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    I have another 90 degree swivel fitting I am putting on the feeder end of the fuel rail. It is going to point towards where the brake booster currently is. The plan is to mount the flex fuel sensor below...
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    Last edited by JehTehsus; 05-25-2020, 08:43 AM.

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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Mostly stuck working on the chicken coop this weekend, but I did manage to rough out a fuel pressure regulator mounting bracket and get the coils all mounted. Coil mounting panel still needs a few adjustments...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    I ended up picking a 0.75 for the fronts and 0.625 for the rears - they actually just arrived today. I think I probably went to big on the fronts, looking over it again.

    Also, quick build...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    They were all up when I was looking at it earlier - good old photobucket.

    I may end up downsizing front cylinder more then. Do you remember what your pedal ration was? I know 6 is probably...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Yeah, I am in a similar boat. Trying to get a bit more space so I can comfortably mount an E85 sensor and fuel filter, never mind all the room the 8AN lines and fittings eat up. That and fully independent...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Are you planning on running it with IS stock sized brakes? If so that makes me feel a little more optimistic. With the way shipping/deliveries are going it is looking like I won't even be able to get...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    This is great, thanks. Another reference should make my install even more painless, not that it seems very complicated from what I was looking at.

    It definitely strikes me as very solid,...
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    Last edited by JehTehsus; 05-20-2020, 08:47 AM.

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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Took a very quick look this long weekend, valve cover seems to sit OK on top of the gasket, I did not torque it down. That said, I may run into issues, because I tried it without a gasket and it definitely...
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    Good to know. My block has been decked a touch, which I suppose could contribute if there is an issue. Overall I think I am actually happy with the studs, even if I do end up having to modify valve cover....
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  • JehTehsus
    replied to JT's M20 Build Thread
    in M20
    I'll take a close look at it this weekend. If it does interference I guess I'm modifying the valve cover....
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