454 Build Help Please
#21
I can get you a price, one set of heads are 088, the other set is 12562934, which are gm factory replacements, identical to the 088s. Both sets are in great shape with isky valve springs matched to the cams.
Are those the style you need?, and the problem is shipping them will be pricey because the are heavy.
Are those the style you need?, and the problem is shipping them will be pricey because the are heavy.
#22
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Oh ok. I am redoing engines and will be selling some stuff, rectangle port heads, weiand single plane intakes, custom madera roller cams etc. all were on a merc 420 454 that had a roller cam upgrade and was around 450 horse. You will have a hard time getting 450 horse with the peanut heads.
#23
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The L29 heads have a strange combustion chamber. It has a large chunk of steel in the combustion chamber I think to help a swirl condition for the intake charge. That chunk of steel is prone to cause detonation. I've used these heads in multiple combinations, the total timing must be limited to 27 - 28 rather than the usual 34 - 36. They are not a good choice for performance builds, if they are all you have check your air fuel ratios under full load and keep them rich.
#25
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HP 500 carb'd cam will get 450hp, Mercruiser used it on their 454 HP450. They used square port heads but I bet torque would be better with the ovals.
You need a cam with close to .600 lift to get there
You need a cam with close to .600 lift to get there