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Thread: LS Mid-Rise Manifold Tests

  1. #1

    Default LS Mid-Rise Manifold Tests

    I'm building a LS1 and would like to use the new "mid rise" manifold but I haven't been able to find any good test results for the manifold. I would like to know how it compares in performance to a LS6 and FAST 92mm style manifolds. I think the mid-rise in a polished finish would have a killer look, but don't want to give up performance, especially in the 1,500 to 5,000 rpm range. This will be a street car, not a racer.....other then the normal "JUMP ON IT" type of enjoyment.
    Any feedback would be appreciated. 1969 Camaro, LS1, T56, Fab9 w/4.30 gears, 335/30R18 tires. Thank you!

  2. #2
    Join Date
    Dec 2009


    I don't know of any LSx "Mid-Rise" performance tests, but these articles are really good:

    If you're after low-to-mid RPM LSx power, read the second to last paragraph:

    These are the LSx intake manifolds illustrated in the above article:

    Holley's "Mid-Rise" EFI intake manifold (dual-plane/EFI plenum):
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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