460 For Pulling

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Jun 14, 2023 | 06:08 PM

muddin_monster

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3rd Gear

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From: Logan

460 For Pulling

Hey all, I am currently wanting to build a 460 for a pulling motor in a 1990 F350. It has EFI, and I assume I'm going to need to change that over to carb for any real performance to be made. My question is regarding the cubes I should run. Here's the class rules:
"6,200 pounds maximum weight with driver. 565 Ci maximum engine displacement, 2 valves per cylinder. Gasoline or alcohol allowed. 31-inch pulling or 36-inch DOT tires. 133-inch maximum wheelbase."
My question is should I push it with a 557" kit, or run safely down with a 514" or 545" kit? Any thoughts?

My other question is would it make sense to build the kit to have fun at a lower power level/lower class and be able to utilize it for mudding as well? My plan is to run different tires for the pull and mudding, but I don't know if that makes sense given the differences between the two sports.

Thanks!
- Chris

Last edited by muddin_monster; Jun 14, 2023 at 06:11 PM.

Jun 15, 2023 | 06:16 AM

DaveMcLain

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Run the largest engine you can run within the rules. Do they require a production block? If not then having a bore larger than 4.440 will really help but right now the SVO and Eliminator blocks are thin on the ground.

Jun 15, 2023 | 10:53 AM

muddin_monster

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From: Logan

Quote:

Originally Posted by DaveMcLain

I'm sorta new to the BBF with EFI, is there any way I can make a good pulling motor utilizing the factory EFI or would running it carbed be much cheaper and easier?

Thanks
Chris

Jun 15, 2023 | 11:07 AM

DaveMcLain

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A carburetor would be easier and cheaper. And make more power most likely. What are the limitations on the cylinder heads and intake manifold? Is a 4500 carburetor allowed? Do they allow headers? Flat tappet or roller cam?

Jun 15, 2023 | 11:24 AM

muddin_monster

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From: Logan

Quote:

Originally Posted by DaveMcLain

From what I have seen, it has to be a 2v per cylinder head, naturally aspirated, and under 565 cubes. Past that point I think I can go whole hog on whatever I want. I'll double check with the league today.

Thanks,
Chris

Jun 18, 2023 | 11:28 PM

OBS460

Logistics Pro

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From: Everywhere and nowhere

Parkland Percormance Auto Machine in Washington and Barnett Performance in Michigan are 2 places that know a lot about making a lot of power with a 460 base.
Parkland Auto Machine - Home
https://barnetthighperformance.com/