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#1
03-11-2016, 09:14 AM
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455 Super Duty build
We are just completing a 1974 455 Super Duty engine build. The ill fated engine only had a few hundred miles on it after a pretty "high end" build and it failed.
The short block is finished and we're going to button the rest up next week, then put it up on the dyno. The build is as follows, .040" over, custom Ross flat top pistons (exactly zero deck), Felpro .039" head gaskets, Eagle rods, balanced assembly, stock heads that have been previously ported but we don't know by who or the head flow. Doesn't look overly dramatic, mostly opened up at the intake gaskets from what I can see, followed by some work back into the runners. We installed a custom ground 230/236/112 HR camshaft, and will use 1.65 Harland Sharp rocker arms. It will have a stock intake (not ported in any way, just gasket matched, stock 1974 Super Duty Q-jet part number 7044273, and a stock 1974 Super Duty distributor (points). Hoping for close to 1hp/cid and 530-540tq for peak numbers. We woln't be chasing the tune really hard for best numbers, just going to run it in on the dyno, check for leaks, and make a few pulls on it. I'll put the dyno sheets up after we're done......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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