[Mighty T/A]

I would have put a Pontiac in it too. Try to buy or build a 5000hp capable unit? Time, spare parts, and reliability won’t be on your side.

Guys! I love the Pontiac engine too. But you can’t do what you can with a 481X to this level simply because of the size limitations. My 572 is 4.5X4.5 with free flowing heads built for that size of bore (no one, not even Bill or whoever is your favorite, can build a head that can match because of the space constraints in the physical size of the block and bore, period!) so if you are ever on a sticky track you will get pulled on the top , period. And yes, billet components are on the shelf with at least 3 suppliers so you can keep racing when you break, and 4500hp will hurt parts no matter how good you are. If it’s a slick track everyone has a shot!

As for the BBC and Hemi discussion, a 481X is a stand alone specifically designed race engine. It’s no brand of engine other than AJPE.




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[LiL Jack]

Originally Posted by Mighty T/A

I would have put a Pontiac in it too. Try to buy or build a 5000hp capable unit? Time, spare parts, and reliability won’t be on your side.

Guys! I love the Pontiac engine too. But you can’t do what you can with a 481X to this level simply because of the size limitations. My 572 is 4.5X4.5 with free flowing heads built for that size of bore (no one, not even Bill or whoever is your favorite, can build a head that can match because of the space constraints in the physical size of the block and bore, period!) so if you are ever on a sticky track you will get pulled on the top , period. And yes, billet components are on the shelf with at least 3 suppliers so you can keep racing when you break, and 4500hp will hurt parts no matter how good you are. If it’s a slick track everyone has a shot!

As for the BBC and Hemi discussion, a 481X is a stand alone specifically designed race engine. It’s no brand of engine other than AJPE.




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That’s understandable.


Big Chief said he is going to Donkey Stomp you tho. 😃

[Anderson Port Development]

Originally Posted by Mighty T/A

I would have put a Pontiac in it too. Try to buy or build a 5000hp capable unit? Time, spare parts, and reliability won’t be on your side.

Guys! I love the Pontiac engine too. But you can’t do what you can with a 481X to this level simply because of the size limitations. My 572 is 4.5X4.5 with free flowing heads built for that size of bore (no one, not even Bill or whoever is your favorite, can build a head that can match because of the space constraints in the physical size of the block and bore, period!) so if you are ever on a sticky track you will get pulled on the top , period. And yes, billet components are on the shelf with at least 3 suppliers so you can keep racing when you break, and 4500hp will hurt parts no matter how good you are. If it’s a slick track everyone has a shot!

As for the BBC and Hemi discussion, a 481X is a stand alone specifically designed race engine. It’s no brand of engine other than AJPE.

... Exactly ...

[adam woodmancy]

Originally Posted by Mighty T/A

It’s no brand of engine other than AJPE.




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Those magic 4 letters are all you need to know.

[LiL Jack]

Originally Posted by adam woodmancy

Those magic 4 letters are all you need to know.

I would piss on those four letters!

Pontiac Power for life!!!!

[adam woodmancy]

Originally Posted by LiL Jack

I would piss on those four letters!

Pontiac Power for life!!!!

I would let Alan piss on me if half his intelligence would rub off on me. Lol

[Stan Weiss]

Originally Posted by LiL Jack

I would piss on those four letters!

Pontiac Power for life!!!!

Jack,
Any of the "Warriors" running one of Alan's products?

Stan

[LiL Jack]

Originally Posted by Stan Weiss

Jack,
Any of the "Warriors" running one of Alan's products?

Stan

No, we are all blue collar guys and can’t afford that high dollar stuff.

[67GTO4SPEED]

Originally Posted by Dragncar

Still, do they make more proven, reliable power than a big aftermarket Chevy, Ford or Hemi ? Is it just another flavor of the same, in the end horsepower ?
Or is there some advantage, cost per HP ?

Originally Posted by adam woodmancy

Those magic 4 letters are all you need to know.

No disrespect meant at all to Alan Johnson, but they didn't exactly reinvent the wheel with the 481X. It's basically a Billet version of a Big Chief with the cam raised and pushrod moved around to improve valvetrain geometry. It has a standard 4.840" BBC bore spacing, and uses a BBC crank, with optimized bearing sizes, an 8 bolt Hemi flange. The block height is 10.4" and they are a 4.5" bore engine, so they've aren't some huge bore, stretched block monster that many assume them to be. The center 3 mains are crossbolted and the block design honestly looks just like a shiny Big Chief block.

They are great engines no doubt, but they are honestly an improved version of a tried and true design that has been around quite a while.

[Dragncar]

Originally Posted by 67GTO4SPEED

No disrespect meant at all to Alan Johnson, but they didn't exactly reinvent the wheel with the 481X. It's basically a Billet version of a Big Chief with the cam raised and pushrod moved around to improve valvetrain geometry. It has a standard 4.840" BBC bore spacing, and uses a BBC crank, with optimized bearing sizes, an 8 bolt Hemi flange. The block height is 10.4" and they are a 4.5" bore engine, so they've aren't some huge bore, stretched block monster that many assume them to be. The center 3 mains are crossbolted and the block design honestly looks just like a shiny Big Chief block.

They are great engines no doubt, but they are honestly an improved version of a tried and true design that has been around quite a while.

Winner winner chicken dinner!!! That is the info I have been waiting for.
Thanks, told me what I needed to know about the engine.