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73-87 Chevy _ GMC Trucks => Performance => Topic started by: Conny8412 on January 12, 2013, 09:32:25 PM
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Hey all,
Decided to go a little cheaper route with my big block swap and buy my buddies 454 off him. This motor is in excellent condition, less then 6 years old and probably 1/2k miles on it. It is out of his restored 86 k30. My question is, i hear 2 bolt mains are a little tougher to build up and reach the HP/TQ #'s you could easily reach with a 4 bolt. Is this true? I first thought about stroking it out and building a 496, but im going to stick with the 454 i think. Im looking to reach the 600HP/600TQ goal. With that being said, i want a TRUCK motor, not a high revving muscle car motor. I want all my TQ at a lower rpm. Are these numbers possible with this motor? Does anyone have a good idea for setup (heads, cam, crank, intake, etc.) that would help me reach these numbers? I am a fan of Lunatti cams and AFR heads, but as we all know, AFR's are outrageous. Is there another aluminum head that i can reach these #'s with? I appreciate the help!
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The amount of bolts holding the crank are irrelevant to the power amount. More bolts equate to stronger bottom end. If you are building a pulling motor ignore the HP output it is just a factor of torque. All the stuff you read in magazines are after peak power, you are after low rpm peak torque and none of what is used one works on the other. 600ft/lb of torque on a big block should be achievable or at least close. You need to determine you power range, transmisison style budget etc and build a package to give what you want. High flow heads will kill your low end power if that is what you are after. Peanut port heads will be the best for low torque...
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What's 1/2 k miles?
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Your two bolt block should handle 600hp just fine. Just keep the compression ratio below 10:1.
A high compression ratio will be more likely to introduce detonation into your engine. The two bolt block won't be as forgiving to your bearings if you start beating it up with detonation.
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Thanks guys. 1,000-2,000 miles on the motor
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Copy! Like the Red!
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Thanks Man!