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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.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, R134a A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

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