Thread: Olds 455 runs hot - dyno 210hp rear wheel

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Make sure it isn't running too lean.

I have a 455 in my W-30 that I built about 10 years ago and I run headers. My first question is why you have a damper on the exhaust manifold as those engines warm up just fine in factory trim without one. How hot is hot, I run a 160 in mine and it stays a nice balmy 165 with a 4 tube brass core, this is a 72 factory 4spd W-30 car. Gets up to 185 or so on a 95deg day. It has always run up around 210 or a little more with the funky 3 tube core it came with and the factory cam.

Next question is did you use the advance/retard chain set from Cloyes and how much did you advance/retard it.

455 .060 over
C casting heads
Mondello JM 28-29 cam (ugly idle)
Rhodes lifters
Offy Port-O-Sonic intake with QuickFuel 850 annular
Milodon Cheater gear drive at 0 degrees

Really low numbers anyway, I would expect 400 @ high 400's or a little more torque.