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Thread: Ruckkehr's 二回目 Second Lap: Clean Build

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  1. #1
    5,000 rpm - there be torque here! Greasemonkey2000's Avatar
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    Quote Originally Posted by RuckkehrMiata View Post
    The mechanic at least told me that without the ECU properly handling it the engine would lean out and cylinder temps would skyrocket possibly leading to damage very quickly if say under WOT.
    Humm...I was just going by what 949 Racing has for the Tomei cams:
    "* The NA8 BP05 cams will work with OEM lifters, valve springs and ECU provided either OEM intake or exhaust is used.

    * If high flow intake and exhaust are both used with any of the cams on this page, the OEM ECU will not provide enough fuel potentially leading a a dangerously lean condition (boom!). Additional power gains will be found with a fully programmable ECU regardless of what other parts are fitted to the engine."

    http://949racing.com/Tomei-miata-cam.aspx

    Obviously these are B6 HKS cams so maybe they are more aggressive and the B6 ecu isn't as capable as the BP...
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  2. #2
    The Technical Guy RuckkehrMiata's Avatar
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    Quote Originally Posted by Greasemonkey2000 View Post
    Humm...I was just going by what 949 Racing has for the Tomei cams:
    "* The NA8 BP05 cams will work with OEM lifters, valve springs and ECU provided either OEM intake or exhaust is used.

    * If high flow intake and exhaust are both used with any of the cams on this page, the OEM ECU will not provide enough fuel potentially leading a a dangerously lean condition (boom!). Additional power gains will be found with a fully programmable ECU regardless of what other parts are fitted to the engine."

    http://949racing.com/Tomei-miata-cam.aspx

    Obviously these are B6 HKS cams so maybe they are more aggressive and the B6 ecu isn't as capable as the BP...
    From the internet:

    264 Intake
    Max Valve Lift - 10.3mm
    Valve opens at 2 deg BTDC
    Valve closes at 28 deg ABDC
    Valve Centerline 105 deg

    264 Exhaust
    Max Valve Lift - 9.8mm
    Valve opens at 42 deg BBDC
    Valve closes at -12 deg ATDC
    Valve Centerline 121


    On a lighter note, it was really cool seeing how these cams changed the cars personality. It heavily smoothed out the HP curve until it was very linear. Pretty much shaped like */*

    I didn't feel the "dead zones" until redline, it was really and truely awesome feeling.
    Last edited by RuckkehrMiata; 09-17-2016 at 05:54 PM.
    `89 NA build: 二回目 My (defunct) `92 NA build: Ruckkehr

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