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Old 10-14-2004, 12:11 AM
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need some help building a 454

I need some help in buiding a strong 454. I am building it to go to mud bogg competitions. Should I have more bottom end or top end. And I have some money for this project but not a fortune. right now the only pieces I have for it is the block and the heads. they are 118cc. Any help would be greatly appreciated.

Chris

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Old 10-14-2004, 06:54 AM
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What are the rules you have to work with?
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Old 10-14-2004, 10:00 AM
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454

the only rules are no nitrous run anything else you want

Chris
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Old 10-14-2004, 10:10 AM
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What's the weight of the buggy? There are a couple of routes you can take with this thing, but the class and weight will determine which route.

Chris
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Old 10-14-2004, 11:33 PM
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they base the class off of the tire size. I run 35 inch boggers. and it is a 80 chevy pick up truck with the center section of the bed cut out. I have the radiator and the fuel cell mounted in the back. it keeps the mud out of the radiator.the truck probably weighs about 2500-3000 lbs.


Thanks,

Chris
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Old 10-15-2004, 07:09 AM
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I'd build a 496CID for this due to the weight. If on a budget get one of Eagle or scats Cast crank stroker kits. You need inches to get that truck moving. Heads, if on a budget get a set of Iron Eagles or Merlins. Around a 320cc runner. If you can swing aluminum, get a set of AFR's or Canfields. This will also keep some weight of the front.

I miss mud drags and bogging. The shop I grew up in we kept the engines in the Orange Crush TNT buggy. That was in the 80's. Nothing like a 611CID BBC fed by a 14-71 on injected alky to get the old heart moving.

Chris
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Old 10-15-2004, 09:28 AM
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I agree with Ctsraub, a 496 would work really well. I am not sure what RPM range you are looking for, but if you dont have the money for a set of aftermarket heads, a set of well ported 049 or 781 ovals on a 496 will make a pretty easy 600 hp with a mech roller cam especially if you go high compression. If you do have the money to go with aftermarket heads, I think AFRs are a really good choice. I would go with the 315cc rectangular port CNC ported heads. With a high compression 496, the 315cc heads, and a decient mech roller cam, you would be making a pretty stout 800 hp.

Good luck
Adam
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Old 10-15-2004, 11:34 AM
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I'm not sure on what range of horse power I'll be running. I havent even looked into the cam yet. I'm not sure if I want more rpms or more torque. The motor I have now is a 383 stroker and it has more rpms than it does torque. I didn't know which would be better for the mud. I want to build this big block to go through a 180 foot pit, but I'm on abudget> ihave goten some great ideashow big of a cam should I run?



Chris
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Old 10-15-2004, 03:02 PM
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Camshaft is the 2nd to last item to be bought. You don't pick a cam and then decide on an engine combo.

Chris
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Old 10-15-2004, 05:31 PM
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I have a build sheet and dyno results of a 496 by John Lingenfelter that will give you some ideals of what you are dealing with. It will be a couple of days before I can get it to you. If I remember correctly, it starts out at 1500 RPM and 470 Ft #s torque and builds to a max of 570 ft#s at 3500 RPM and 422 HP at 4000 RPM. The torque is within 100 pounds through out the RPM range, while the Horse power steadily increases to 4500RPM.

Trees
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Old 10-15-2004, 09:21 PM
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trees

hey that would be very helpful. Thank you that should help me out alot


Chris

also would it be better to run one big carb or two four barrels. also how big of a carb should I use if I build a 496.



Chris

also would it be better to run one big carb or two four barrels. also how big of a carb should I use if I build a 496.



Chris

what size of mechanical roller cam should I use once have everything else figured out.


Chris
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